Product details

Architecture FET / CMOS Input, Fixed Gain/Buffer Number of channels (#) 1 Total supply voltage (Min) (+5V=5, +/-5V=10) 9 Total supply voltage (Max) (+5V=5, +/-5V=10) 13 GBW (Typ) (MHz) 3100 BW @ Acl (MHz) 3100 Acl, min spec gain (V/V) 1 Slew rate (Typ) (V/us) 7000 Vn at flatband (Typ) (nV/rtHz) 2.3 Vn at 1 kHz (Typ) (nV/rtHz) 10 Iq per channel (Typ) (mA) 34 Vos (offset voltage @ 25 C) (Max) (mV) 800 Rail-to-rail No Features Adjustable BW/IQ/IOUT, Integrated Clamps Rating Catalog Operating temperature range (C) -40 to 85 Input bias current (Max) (pA) 25 Offset drift (Typ) (uV/C) 700 2nd harmonic (dBc) -55 3rd harmonic (dBc) -59 @ MHz 1000
Architecture FET / CMOS Input, Fixed Gain/Buffer Number of channels (#) 1 Total supply voltage (Min) (+5V=5, +/-5V=10) 9 Total supply voltage (Max) (+5V=5, +/-5V=10) 13 GBW (Typ) (MHz) 3100 BW @ Acl (MHz) 3100 Acl, min spec gain (V/V) 1 Slew rate (Typ) (V/us) 7000 Vn at flatband (Typ) (nV/rtHz) 2.3 Vn at 1 kHz (Typ) (nV/rtHz) 10 Iq per channel (Typ) (mA) 34 Vos (offset voltage @ 25 C) (Max) (mV) 800 Rail-to-rail No Features Adjustable BW/IQ/IOUT, Integrated Clamps Rating Catalog Operating temperature range (C) -40 to 85 Input bias current (Max) (pA) 25 Offset drift (Typ) (uV/C) 700 2nd harmonic (dBc) -55 3rd harmonic (dBc) -59 @ MHz 1000
VQFN (RGT) 16 9 mm² 3 x 3
  • Large-signal bandwidth (1 VPP): 3.1 GHz
  • Slew rate: 7000 V/µs
  • Input voltage noise: 2.3 nV/√Hz
  • 1% settling time: 0.7 ns
  • Input-impedance: 50 GΩ || 2.4 pF
  • Capable of driving 50 Ω load
  • Adjustable quiescent current for power and performance trade-off
  • Integrated input and output clamp with fast overdrive recovery
  • Voltage supply: ±4.5 V to ±6.5 V
  • Large-signal bandwidth (1 VPP): 3.1 GHz
  • Slew rate: 7000 V/µs
  • Input voltage noise: 2.3 nV/√Hz
  • 1% settling time: 0.7 ns
  • Input-impedance: 50 GΩ || 2.4 pF
  • Capable of driving 50 Ω load
  • Adjustable quiescent current for power and performance trade-off
  • Integrated input and output clamp with fast overdrive recovery
  • Voltage supply: ±4.5 V to ±6.5 V

The BUF802 device is an open-loop, unity gain buffer with a JFET-input stage that offers low-noise, high-impedance buffering for data acquisition system (DAQ) front-ends. The BUF802 supports DC to 3.1 GHz of bandwidth while offering excellent distortion and noise performance across the frequency range.

The BUF802 may be used in a composite loop with a precision amplifier in applications where higher precision performance is required. The BUF802 uses an innovative architecture to simplify the design of high-precision, wide-bandwidth composite loops.

The BUF802 features an adjustable quiescent current pin, which enables designers to trade bandwidth and distortion for a lower quiescent current, thus making the part suitable across a wide-frequency range. The BUF802 has integrated input and output clamps to protect the device and its subsequent signal-chain from overdrive voltages.

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The BUF802 device is an open-loop, unity gain buffer with a JFET-input stage that offers low-noise, high-impedance buffering for data acquisition system (DAQ) front-ends. The BUF802 supports DC to 3.1 GHz of bandwidth while offering excellent distortion and noise performance across the frequency range.

The BUF802 may be used in a composite loop with a precision amplifier in applications where higher precision performance is required. The BUF802 uses an innovative architecture to simplify the design of high-precision, wide-bandwidth composite loops.

The BUF802 features an adjustable quiescent current pin, which enables designers to trade bandwidth and distortion for a lower quiescent current, thus making the part suitable across a wide-frequency range. The BUF802 has integrated input and output clamps to protect the device and its subsequent signal-chain from overdrive voltages.

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Technical documentation

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Type Title Date
* Data sheet BUF802 Wide-Bandwidth, 2.3 nV/√Hz, JFET Input Buffer datasheet (Rev. A) 08 Dec 2021
User guide BUF802RGTEVM User's Guide 14 Jun 2021
Technical article How to reduce distortion in high-voltage, high-frequency signal generation for AWGs 30 Oct 2018
Technical article What are the advantages of using JFET-input amplifiers in high-speed applications? 19 Jun 2018
Technical article Unique active mux capability combines buffer and switch into one solution 10 Oct 2017
Technical article How to minimize filter loss when you drive an ADC 20 Oct 2016

Design & development

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Evaluation board

BUF802RGTEVM — BUF802 evaluation module high-speed, wide-bandwidth, 2.3-nV/√Hz, input buffer in RGT package

The BUF802RGTEVM evaluation module (EVM) is designed to easily demonstrate the functionality and versatility of the BUF802 buffer. The EVM can be configured for a composite loop with a precision amplifier or just the BUF802 device. It features single or split supplies and footprints for SMA (...)
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Simulation model

BUF802 TINA-TI Reference Circuit (Rev. B)

SBOMBQ8B.TSC (5133 KB) - TINA-TI Spice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
Calculation tool

ANALOG-ENGINEER-CALC — Analog engineer's calculator

The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
Calculation tool

VOLT-DIVIDER-CALC — Voltage Divider Determines A Set of Resistors for a Voltage Divider

VOLT-DIVIDER-CALC quickly determines a set of resistors for a voltage divider. This KnowledgeBase Javascript utility can be used to find a set of resistors for a voltage divider to achieve the desired output voltage. This calculator can also be used to design non-inverting attentuation circuits.

(...)

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VQFN (RGT) 16 View options

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