Opa2604 datasheet pdf. Dual FET-Input, Low Distortion Operational Amplifier. Fr (equency Hz) Open Loop Gain (db) Phase (q)-40 -200-20 -160 0 -120 20 -80 40 -40 60 0 80 40 100 80 120 120 140 160 160 200 100m 1 10 100 1k 10k 100k 1M 10M 100M Open Loop Gain Phase Open-Loop Gain and Phase vs Frequency Offset Voltage Drift OPA828, OPA2828 SBOS671D – SEPTEMBER 2018 – REVISED DECEMBER 2022 OPA604 Datasheet. The IC has range of working conditions a wide range of working voltages OPA2604: 165Kb / 14P: Dual FET-Input, Low Distortion OPERATIONAL AMPLIFIER Texas Instruments: OPA2604-Q1: 310Kb / 16P [Old version datasheet] DUAL FET-INPUT, LOW DISTORTION OPERATIONAL AMPLIFIER OPA2604: 435Kb / 26P [Old version datasheet] Dual FET-Input, Low-Distortion Operational Amplifier OPA2604-Q1: 309Kb / 16P OPA2604-Q1: Manufacturer Texas Instruments: Description OPERATIONAL AMPLIFIER: Published Aug 27, 2019: Detailed Description OPA2604ĆQ1 DUAL FETĆINPUT, LOW DISTORTION OPERATIONAL AMPLIFIER SGLS209 − NOVEMBER 2003 features D Qualification in Acc Datasheet OPA2604-Q1 PDF File OPA2604 SBOS006A –SEPTEMBER 2000–REVISED DECEMBER 2015 OPA2604 Dual FET-Input, Low-Distortion Operational Amplifier 1 Features 3 Description The OPA2604 is a dual, FET-input operational 1• Low Distortion: 0. Part #: OPA2604. Low Input Offset Voltage: 0. Manufacturer: Burr-Brown (TI). VO = ±3VpRf = Internal feedback resistance = 1. 2. 1 Features 3 Description The OPA2604 is a dual Burr-Brown was an American company that was founded in 1956 and specialized in the design and manufacture of high-performance analog and mixed-signal integrated circuits (ICs). Automotive Catalog Dual FET-Input Low-Distortion Operational Amplifier 8-SOIC -40 to 125. OPA2604 tải về. OPA2604-Q1 OPERATIONAL AMPLIFIER - Texas Instruments. OPA2607 CMOS Operational Amplifier - Texas Instruments. Page: 16 Pages. The NE5532, NE5532A, SA5532, and SA5532A devices are high-performance operational amplifiers combining excellent DC and AC characteristics. This device also has a high output-drive capability of +145 mA per –130 mA. 44 Kbytes. 35 mm × 9. 11 Results. View options The OPA2604 is available in 8-pin plastic mini-DIP and 8-Pin SOIC surface-mount packages, specified for the –25°C to 85°C temperature range. 5 OP2604 Datasheet. DUAL VERSION AVAILABLE (OPA2604) APPLICATIONS . + + Treble Bass OPA165x OPA165x Input Output Pad Active Baxandall Tone Control Frequency (Hz) Vol ge Noise ta Densit y ( nV/ Hz) 1 10 100 10 100 1k 10k 100k 1M 10M C0 20 Ultra-Low Input Voltage Noise OPA1655 , OPA1656 SBOS901C – MARCH 2019 – REVISED SEPTEMBER 2022 Products Precision op amps (Vos<1mV) INA1620 — High-fidelity audio operational amplifier with integrated thin-film resistors and EMI filtering OPA130 — Single, 1-MHz, 20-pA bias current, 530-µA power, FET operational amplifier OPA131 — Single, 4-MHz, 50-pA bias current, 750-µA power, FET operational amplifier OPA140 — Single-channel, 11-MHz, low-noise 36-V JFET precision operational If you have questions about quality, packaging or ordering TI products, see TI support. • Low Noise: 10 nV/√Hz Low distortion, low noise, and wide SLOS070D –JULY 1979–REVISED NOVEMBER 2014. Datasheet search, datasheets, Datasheet search site for Electronic Components and Semiconductors Feb 23, 2021 · 4 Application. 91 mm × 4. OPA2604AP ti OPA2604, Dual FET-Input, Low Distortion Operational Amplifier . The ADA4625-1 is specified for operation over the extended industrial temperature range of −40°C to +125°C and operates from +5 V to +36 V (±2. Datasheet: Description: Burr-Brown (TI) OPA2604: 214Kb / 12P: Dual FET-Input, Low Distortion OPERATIONAL AMPLIFIER OPA2604: 165Kb / 14P: Dual FET-Input, Low Distortion OPERATIONAL AMPLIFIER Texas Instruments: OPA2604-Q1: 310Kb / 16P [Old version datasheet] DUAL FET-INPUT, LOW DISTORTION OPERATIONAL AMPLIFIER OPA2604-Q1: 309Kb / 16P OPA604 Datasheet (PDF) - Texas Instruments: Click to view in HTML datasheet. The limit current decreases with increasing temperature as shown in the typical curves. ® OPA2604 1. 1 Features 3 Description. 002%. As a buffer the AD847 offers a full-power bandwidth of 12. Download OPA2604 pdf datasheet file OPA2604: 165Kb / 14P: Dual FET-Input, Low Distortion OPERATIONAL AMPLIFIER Texas Instruments: OPA2604-Q1: 310Kb / 16P [Old version datasheet] DUAL FET-INPUT, LOW DISTORTION OPERATIONAL AMPLIFIER OPA604: 693Kb / 16P [Old version datasheet] FET-Input, Low Distortion OPERATIONAL AMPLIFIER Burr-Brown (TI) OPA604: 178Kb / 12P: FET-Input, Low We would like to show you a description here but the site won’t allow us. Burr-Brown's product portfolio included a OPA26 04AU Manufacturer. 41 Kbytes: OPA2604: 165Kb / 14P: Dual FET-Input, Low Burr-Brown was an American company that was founded in 1956 and specialized in the design and manufacture of high-performance analog and mixed-signal integrated circuits (ICs). The company was known for its expertise in analog technology, high-quality products, and innovation in the field of analog ICs. Very low distortion, low noise and wide bandwidth provide superior performance in high quality audio and other applications requiring excellent dy- (+) namic performance. Voltage Noise Density vs. 4. Aug 27, 2019 · The OPA2604 is available in 8-pin plastic mini-DIP and 8-Pin SOIC surface-mount packages, specified for the –25°C to 85°C temperature range. The document has moved here. Using the Dual OPA2604 Op Amp to Double the Output Current to a Load. Low Voltage Noise: 4. Burr-Brown's product portfolio included a We would like to show you a description here but the site won’t allow us. Standard Package OPA2604 Datasheet, PDF [Old version datasheet] Manufacturer: Part # Datasheet: Description: Burr-Brown (TI) OPA2604: 214Kb / 12P: Dual FET-Input, Low Distortion The OPA164x family of operational amplifiers combine an ultra low noise JFET input stage with a rail-to-rail output stage to provide high overall performance in audio applications. 0 V to 18 V. The OPA2604 is available in 8-pin plastic mini-DIP and SO-8 surface-mount packages, specified for the –25°C to +85°C temperature range. q LOW DISTORTION: 1kHz q LOW NOISE: 10nV/Hz q HIGH SLEW RATE: 25V/µs q WIDE GAIN-BANDWIDTH: 20MHz q UNITY-GAIN STABLE q WIDE SUPPLY RANGE: ±24V q DRIVES 600 LOADS. Frequency. 1mV) give the amplifier excellent operational amplifier DC performance. the end of the data sheet. OPA2604 bảng dữ liệu (PDF) - Burr-Brown (TI) [Old version datasheet] Texas Instruments acquired Burr-Brown Corporation. Description: FET-Input, Low Distortion OPERATIONAL AMPLIFIER. The NE5534, NE5534A, SA5534, and SA5534A. FIGURE 9. OPA2604. OPA2607 Dual / High Output / Current-Feedback OPERATIONAL AMPLIFIER - Burr-Brown. When compared to the popular OPA111 op amp, the OPA6x7 have lower noise, lower offset voltage, and higher speed. A) Dual, Wideband, High Output Current Operational Amplifier datasheet (Rev. Apr 9, 2015 · Download OPA2604 Datasheet PDF Texas Instruments document. 85nV/√Hz 1kHz noise, 1. Datasheet: Description: Burr-Brown (TI) OPA2604: 214Kb / 12P: Dual FET-Input, Low Distortion OPERATIONAL AMPLIFIER Texas Instruments: OPA2604-Q1: 310Kb / 16P [Old version datasheet] DUAL FET-INPUT, LOW DISTORTION OPERATIONAL AMPLIFIER OPA2604: 435Kb / 26P [Old version datasheet] Dual FET-Input, Low-Distortion Operational Amplifier OPA604: 693Kb Datasheet: Description: Burr-Brown (TI) OPA2604: 214Kb / 12P: Dual FET-Input, Low Distortion OPERATIONAL AMPLIFIER OPA2604: 165Kb / 14P: Dual FET-Input, Low Distortion OPERATIONAL AMPLIFIER Texas Instruments: OPA2604: 435Kb / 26P [Old version datasheet] Dual FET-Input, Low-Distortion Operational Amplifier OPA2604-Q1: 310Kb / 16P Tel: +86-16625136617. The LM4562 has a wide supply range of ±2. The low power and small outline package of the AD847 make it very well suited for high density applications such as multiple pole active filters. The output is capable of driving 600 loads to 10 V rms while maintaining low distortion. This ultralow noise is combined with excellent high speed specifications (gain-bandwidth product is 75MHz for LT1028, 20MHz for LT1128), distortion-free output, and true The MC33078/9 family offers both dual and quad amplifier versions and is available in the plastic DIP and SOIC packages (P and D suffixes). Part #: OPA604. OPA2604 Datasheet (PDF) - Texas Instruments: Part # OPA2604: Description Dual FET-Input, Low-Distortion Operational Amplifier: File Size 435. OPA1656 Datasheet (PDF) Download Datasheet: Part # OPA1656: Download OPA1656 Click to download: File Size 611. C. R4 22kΩ C3 R1 VIN 2. 1 Absolute Maximum Ratingsover operating free-air temperature range (unless otherwise noted)(1)MINMAXUNIT Datasheet search, datasheets, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes, triacs and other semiconductors. 7 MHz (5 V p-p with ±5 V supplies) making it outstand- ing as an input buffer for flash A/D converters. Data sheet: FET-Input, Low Distortion Operational Amplifier datasheet (Rev. Mongkok Kowloon HongKong OPA2604 Datasheet, PDF : Search Partnumber : Start with "OPA2604"-Total : 19 ( 1/1 Page) Manufacturer: Part # Datasheet: Description: Texas Instruments: OPA2604-Q1 OPA2604. OPA2604®12FIGURE 7. The OPA2604 is a dual, FET-input operational ampli-fier designed for enhanced AC performance. Hello, everyone. Datasheet: 178Kb/12P. Compared to most of the standard operational amplifiers, such as the 1458, it shows better noise performance, improved output drive capability and considerably higher small-signal and power bandwidths. File Size. FEATURES. of Input Offset Voltage: 2. The OPA1622 operates over a very wide supply range of ±2 V to ±18 V, on only 2. This makes the device especially suitable for . The OPA2604 is a dual, FET-input operational amplifier designed for enhanced AC performance. 435Kb/26P. Burr-Brown's product portfolio included a Part #: EL2244. OPA2604: 214Kb / 12P: Dual FET-Input, Low Distortion OPERATIONAL AMPLIFIER OPA2604: Products Precision op amps (Vos<1mV) INA1620 — High-fidelity audio operational amplifier with integrated thin-film resistors and EMI filtering OPA130 — Single, 1-MHz, 20-pA bias current, 530-µA power, FET operational amplifier OPA131 — Single, 4-MHz, 50-pA bias current, 750-µA power, FET operational amplifier OPA140 — Single-channel, 11-MHz, low-noise 36-V JFET precision operational View datasheets, stock, pricing and more for OPA2604. The OPAx132 series of JFET operational amplifiers combine low noise and wide bandwidth with precision and low input bias current to make them the ideal choice for applications with a high source impedance. 81 mm (1) For all available packages, see the orderable addendum at the end of the Download OPA2604AUG4 Datasheet PDF Texas Instruments document. Figure 2. Datasheet. Oct 3, 2003 · The OPA2604 is a dual, FET-input operational ampli-fier designed for enhanced AC performance. TOTAL HARMONIC DISTORTION + NOISEvs FREQUENCYFrequency (Hz)1 Datasheet search, datasheets, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes, triacs and other semiconductors. 5kΩ Datasheet search, datasheets, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes, triacs and other semiconductors. A) - ZIP (09/28/2011) The is a dual, FET-input operational amplifier designed for enhanced AC performance. Applications with noisy or highimpedance power supply lines may require decoupling ca-pacitors close to the device pins. OPA2604 Dual FET-Input, Low-Distortion Operational Amplifier datasheet (Rev. New circuit techniques and special laser trimming of OPA2604: 165Kb / 14P: Dual FET-Input, Low Distortion OPERATIONAL AMPLIFIER Texas Instruments: OPA2604-Q1: 310Kb / 16P [Old version datasheet] DUAL FET-INPUT, LOW DISTORTION OPERATIONAL AMPLIFIER OPA2604: 435Kb / 26P [Old version datasheet] Dual FET-Input, Low-Distortion Operational Amplifier OPA2604-Q1: 309Kb / 16P OPA2604 Datasheet (PDF) - Burr-Brown (TI) [Old version datasheet] Texas Instruments acquired Burr-Brown Corporation. Similar Datasheet. Html View. 97 Kbytes. 0. Find parameters, ordering and quality information. Download datasheet for OPA2604 by Texas Instruments. Download. 15 mV Low T. 214. High Impedance Amplifier. 8µV/˚C Drift Max, Precision Operational Amplifier. OPA2604: 165Kb / 14P: Dual FET-Input, Low Distortion OPERATIONAL AMPLIFIER Texas Instruments: OPA2604-Q1: 310Kb / 16P [Old version datasheet] DUAL FET-INPUT, LOW DISTORTION OPERATIONAL AMPLIFIER OPA604: 693Kb / 16P [Old version datasheet] FET-Input, Low Distortion OPERATIONAL AMPLIFIER Burr-Brown (TI) OPA604: 178Kb / 12P: FET-Input, Low Aug 15, 2021 · Which OpAmp is Better for 20W Class A Amplifier - OPA2604 vs NE5532? IC OPAMP GP 2 CIRCUIT 8DIP. The OPA1622 op amp is unity-gain stable and provides excellent dynamic behavior over a wide range of load conditions. 81 mm (1) For all available packages, see the orderable addendum at the end of the OPA2604 Datasheets (23) Part ECAD Model Manufacturer Description Curated Type PDF; OPA2604: Burr-Brown Dual FET-Input, Low Distortion OPERATIONAL AMPLIFIER: Original: PDF Download OPA2604 Datasheet. 5. 6 mA of supply current per channel. OPA2604 SBOS006A –SEPTEMBER 2000–REVISED DECEMBER 2015 OPA2604 Dual FET-Input, Low-Distortion Operational Amplifier 1 Features 3 Description The OPA2604 is a dual, FET-input operational 1• Low Distortion: 0. Burr Brown. OPA2626 High-Speed, High-Precision, Low-Distortion, 16-Bit and 18-Bit Analog-to-Digital Converter (ADC) Driver datasheet (Rev. OPA2604 AP. The LT®1028(gain of –1 stable)/LT1128(gain of +1 stable) achieve a new standard of excellence in noise performance with 0. 0003% at 1 kHz amplifier designed for enhanced AC performance. • Low Noise: 10 nV/√Hz Low distortion, low noise, and wide The OPA2604 is a dual, FET-input operational amplifier designed for enhanced AC performance. In most cases 1µF tantalumcapacitors are adequate. Dual FET-Input, Low Distortion OPERATIONAL AMPLIFIER. 5 nV/√Hz Typ devices are high-performance operational amplifiers combining excellent dc and ac characteristics. Description: Dual FET-Input, Low-Distortion Operational Amplifier. OP2604 is a dual, FET-input operational amplifier designed for enhanced AC performance. New circuit techniques and special laser trimming of dynamic circuit performance yield OPA2604 provides wide dynamic range, even with high source impedance. 3. New circuit techniques and special laser trimming of dynamic circuit performance yield very low harmonic distortion. The 5532 is a dual high-performance low noise operational amplifier. 165. V/ °C. ti. 5 V to ±18 V) with specifications at +5 V and ±18 V. Burr-Brown was an American company that was founded in 1956 and specialized in the design and manufacture of high-performance analog and mixed-signal integrated circuits (ICs). Digital Audio DAC I-V Amplifier. 1• Equivalent Input Noise Voltage. 5V to ±17V. 电子发烧友网为你提供ti(ti)opa2604相关产品参数、数据手册，更有opa2604的引脚图、接线图、封装手册、中文资料、英文资料，opa2604真值表，opa2604管脚等资料，希望可以帮助到广大的电子工程师们。 OPA2604 SBOS006A – SEPTEMBER 2000 – REVISED DECEMBER 2015www. THD + Noise at 3 V rms is a low 0. The internal topology is selected specifically to deliver extremely low distortion, consume limited power, and accommodate small packages. OPA2604®4TYPICAL PERFORMANCE CURVESAt TA = +25°C, VS = ±15V, unless otherwise noted. Low distortion, low noise, and wide bandwidth provide superior performance in high quality audio and other applications requiring dynamic performance. OPA2604 OPERATIONAL AMPLIFIER - Texas Instruments. 14 Pages. FIGURE 8. File Size: 445Kbytes. 90 mm 6. Datasheet: Description: Burr-Brown (TI) OPA2604: 165Kb / 14P: Dual FET-Input, Low Distortion OPERATIONAL AMPLIFIER Texas Instruments: OPA2604-Q1: 310Kb / 16P [Old version datasheet] DUAL FET-INPUT, LOW DISTORTION OPERATIONAL AMPLIFIER OPA2604: 435Kb / 26P [Old version datasheet] Dual FET-Input, Low-Distortion Operational Amplifier OPA604: 693Kb Manufacturer: Part No. Dual Supply Operation: 5. The ADA4625-1 is available in 8-lead SOIC package with an exposed pad (EPAD). Features. Very low distortion, low noise and wide bandwidth provide superior performance in high quality audio and other applications requiring excellent dynamic performance. view and then download documents in PDF format Datasheet: Description: Burr-Brown (TI) OPA2604: 165Kb / 14P: Dual FET-Input, Low Distortion OPERATIONAL AMPLIFIER Texas Instruments: OPA2604: 435Kb / 26P [Old version datasheet] Dual FET-Input, Low-Distortion Operational Amplifier OPA2604-Q1: 310Kb / 16P [Old version datasheet] DUAL FET-INPUT, LOW DISTORTION OPERATIONAL AMPLIFIER OPA2604-Q1 Dual FET-Input, Low Distortion OPERATIONAL AMPLIFIER, OPA2604 Datasheet, OPA2604 circuit, OPA2604 data sheet : BURR-BROWN, alldatasheet, Datasheet, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes, triacs and other semiconductors. Offset voltage is laser-trimmed to minimize the need for interstage coupling capacitors. For free without registration Datasheet: Description: Burr-Brown (TI) OPA2604: 214Kb / 12P: Dual FET-Input, Low Distortion OPERATIONAL AMPLIFIER Texas Instruments: OPA2604-Q1: 310Kb / 16P [Old version datasheet] DUAL FET-INPUT, LOW DISTORTION OPERATIONAL AMPLIFIER OPA2604: 435Kb / 26P [Old version datasheet] Dual FET-Input, Low-Distortion Operational Amplifier OPA604: 693Kb OPA2604 PSpice Model (Rev. Dual FET-Input, Low-Distortion Operational Amplifier 8-SOIC -40 to 85. A) 本资料有OPA2604、OPA2604 pdf、OPA2604中文资料、OPA2604引脚图、OPA2604管脚图、OPA2604简介、OPA2604内部结构图和OPA2604引脚功能。. NE5534x, SA5534x Low-Noise Operational Amplifiers. TI’s OPA627 is a 55V/µS, High-Speed, 0. A) SpeedPlus™ Dual, 700MHz, Voltage-Feedback Operational Amplifier datasheet (Rev. The OPAx132 is unity-gain stable and features high slew rate (±20 V/μs) and wide bandwidth (8 MHz). 0006%. Description: Dual/Quad Low-Power 120MHz Unity-Gain Stable Op Amp. Low Total Harmonic Distortion: 0. OUTPUT CURRENT LIMIT Output current is limited by internal circuitry to approximately ±40mA at 25°C. File Size: 435. 5 nV/ Hz. Moved Permanently. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) OPA2604 SOIC (8) PDIP (8) 3. The LM4562's outstanding CMRR (120dB), PSRR (120dB), and VOS (0. File Size: 165. Description: Dual FET-Input, Low Distortion OPERATIONAL AMPLIFIER. Email: [email protected] Address: Room 5 2/F Ho King Commercial Centre 3-25 Fa Yuen Str. This is Rose. Over this supply range the LM4562’s input circuitry maintains excellent common-mode and power supply rejection, as well as maintaining its low input bias Download OPA2604 Datasheet. Manufacturer: Texas Instruments. Part #. The OPA6x7 are useful in a broad range of precision and high-speed analog circuitry. 0nV/√Hz 10Hz noise. NE5532 Product details. OPA2604 Datasheet(PDF) 1 Page - Texas Instruments: Part # OPA2604: Description Dual FET-Input, Low-Distortion Operational Amplifier: Download 26 Pages: Scroll/Zoom The OPA627 and OPA637 (OPA6x7) operational amplifiers (op amps) provide a new level of performance in a precision FET operational amplifier. Dual FET-Input, Low-Distortion Operational Amplifier. 97 Kbytes : Html View Download the OPA2604 datasheet from Texas Instruments. Datasheet: Description: Texas Instruments: OPA2604: 435Kb / 26P [Old version datasheet] Dual FET-Input, Low-Distortion Operational Amplifier OPA2604-Q1 : 310Kb / 16P Datasheet: Description: Burr-Brown (TI) OPA2604: 214Kb / 12P: Dual FET-Input, Low Distortion OPERATIONAL AMPLIFIER Texas Instruments: OPA2604-Q1: 310Kb / 16P [Old version datasheet] DUAL FET-INPUT, LOW DISTORTION OPERATIONAL AMPLIFIER OPA2604: 435Kb / 26P [Old version datasheet] Dual FET-Input, Low-Distortion Operational Amplifier OPA604: 693Kb addendum at the end of the data sheet. 7kΩ 22kΩ C1 3000pF 10kΩ C2 2000pF fp = 20kHz R2 R3 1 2 100pF OPA2604 VO FIGURE 3. 58 Kbytes. Manufacturer: Elantec Semiconductor. [Old version datasheet] Dual FET-Input, Low-Distortion Operational Amplifier. [Old version datasheet] DUAL FET-INPUT, LOW DISTORTION OPERATIONAL AMPLIFIER. OPA2604 -Q1. Description. User guide: PDF. Today we will have a discussion about OPA2604, which is a dual FET-input, low-distortion operational amplifier. New circuit techniques and special laser trimming of dynamic circuit performance yield This allows the OP275 to be used in many dc-coupled or sum-ming applications without the need for special selections or the added noise of additional offset adjustment circuitry. Texas Instruments. This article mainly introduce schematic, replacement, datasheet and other detailed information about Texas Instruments OPA2604. 310Kb/16P. com6 Specifications6. Datasheet: Description: Burr-Brown (TI) OPA2604: 165Kb / 14P: Dual FET-Input, Low Distortion OPERATIONAL AMPLIFIER Texas Instruments: OPA2604-Q1: 310Kb / 16P [Old version datasheet] DUAL FET-INPUT, LOW DISTORTION OPERATIONAL AMPLIFIER OPA2604: 435Kb / 26P [Old version datasheet] Dual FET-Input, Low-Distortion Operational Amplifier OPA604: 693Kb OPA2604®8APPLICATIONS INFORMATIONThe OPA2604 is unity-gain stable, making it easy to use in awide range of circuitry. They feature very low noise, high output-drive capability, high unity-gain and maximum-output-swing bandwidths, low distortion, high slew rate, input-protection diodes, and output short-circuit protection. The OPA604 is a FET-input operational amplifier designed for enhanced AC performance. OPA2604 Dual FET-Input / Low Distortion OPERATIONAL AMPLIFIER - Burr-Brown. en vx wx ce nj ta rs xs nn bq