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PGA849

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Low-noise wide-bandwidth precision programmable-gain amplifier

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Data sheet

PGA849

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Product details

Features Overvoltage protection, Super-beta PGA/VGA PGA Number of channels 1 Digital interface Pin programmable Vs (max) (V) 36 Vs (min) (V) 8 Input type Differential Input offset drift (±) (typ) (V/°C) 0.0000002 Input voltage noise (typ) (V√Hz) 0.0000000078 Noise at 0.1 Hz to 10 Hz (typ) (VPP) 0.00000026 BW at Acl (MHz) 10 Acl, min spec gain (V/V) 0.125 Slew rate (typ) (V/µs) 35 Iq per channel (typ) (mA) 4.3 Gain (max) (dB) 24 Gain error (typ) (%) 0.02 Gain drift (max) (ppm/°C) 2 Rating Catalog Architecture Bipolar Operating temperature range (°C) -40 to 125
Features Overvoltage protection, Super-beta PGA/VGA PGA Number of channels 1 Digital interface Pin programmable Vs (max) (V) 36 Vs (min) (V) 8 Input type Differential Input offset drift (±) (typ) (V/°C) 0.0000002 Input voltage noise (typ) (V√Hz) 0.0000000078 Noise at 0.1 Hz to 10 Hz (typ) (VPP) 0.00000026 BW at Acl (MHz) 10 Acl, min spec gain (V/V) 0.125 Slew rate (typ) (V/µs) 35 Iq per channel (typ) (mA) 4.3 Gain (max) (dB) 24 Gain error (typ) (%) 0.02 Gain drift (max) (ppm/°C) 2 Rating Catalog Architecture Bipolar Operating temperature range (°C) -40 to 125
VQFN (RGT) 16 9 mm² 3 x 3
  • Differential to single-ended conversion
  • Eight pin-programmable binary gains
    • G (V/V) = ⅛, ¼, ½, 1, 2, 4, 8, and 16
  • Low gain error drift: 2ppm/°C (max)
  • Faster signal processing:
    • Wide bandwidth: 10MHz at all gains
    • High slew rate: 35V/µs
    • Settling time: 500ns to 0.01%, 950ns to 0.0015%
    • Input stage noise: 7.8nV/√Hz at G = 16V/V
    • Filter option to achieve better SNR
  • Input overvoltage protection to ±40V beyond supplies
  • Input-stage supply range:
    • Single supply: 8V to 36V
    • Dual supply: ±4V to ±18V
  • Independent output power-supply pins
  • Output-stage supply range:
    • Single supply: 4.5V to 36V
    • Dual supply: ±2.25V to ±18V
  • Specified temperature range: ­–40°C to +125°C
  • Small package: 3mm × 3mm QFN
  • Differential to single-ended conversion
  • Eight pin-programmable binary gains
    • G (V/V) = ⅛, ¼, ½, 1, 2, 4, 8, and 16
  • Low gain error drift: 2ppm/°C (max)
  • Faster signal processing:
    • Wide bandwidth: 10MHz at all gains
    • High slew rate: 35V/µs
    • Settling time: 500ns to 0.01%, 950ns to 0.0015%
    • Input stage noise: 7.8nV/√Hz at G = 16V/V
    • Filter option to achieve better SNR
  • Input overvoltage protection to ±40V beyond supplies
  • Input-stage supply range:
    • Single supply: 8V to 36V
    • Dual supply: ±4V to ±18V
  • Independent output power-supply pins
  • Output-stage supply range:
    • Single supply: 4.5V to 36V
    • Dual supply: ±2.25V to ±18V
  • Specified temperature range: ­–40°C to +125°C
  • Small package: 3mm × 3mm QFN

The PGA849 is a wide-bandwidth, low-noise programmable gain instrumentation amplifier for differential-to-single-ended conversion. The PGA849 is equipped with eight binary gain settings, from an attenuating gain of 0.125V/V to a maximum of 16V/V, using three digital gain selection pins.

The PGA849 architecture is optimized to drive inputs of high-resolution, precision analog-to-digital converters (ADCs) with sampling rates up to 1MSPS without the need for an additional ADC driver. The output-stage power supplies are decoupled from the input stage to protect the ADC or downstream device against overdrive damage.

The super-beta input transistors offer an impressively low input bias current, which in turn provides a very low input current noise density of 0.3pA/√Hz, making the PGA849 a versatile choice for virtually any sensor type. The low-noise current-feedback front-end architecture offers exceptional gain flatness even at high frequencies, making the PGA849 an excellent high-impedance sensor readout device. Integrated protection circuitry on the input pins handles overvoltages of up to ±40V beyond the power-supply voltages.

The PGA849 is a wide-bandwidth, low-noise programmable gain instrumentation amplifier for differential-to-single-ended conversion. The PGA849 is equipped with eight binary gain settings, from an attenuating gain of 0.125V/V to a maximum of 16V/V, using three digital gain selection pins.

The PGA849 architecture is optimized to drive inputs of high-resolution, precision analog-to-digital converters (ADCs) with sampling rates up to 1MSPS without the need for an additional ADC driver. The output-stage power supplies are decoupled from the input stage to protect the ADC or downstream device against overdrive damage.

The super-beta input transistors offer an impressively low input bias current, which in turn provides a very low input current noise density of 0.3pA/√Hz, making the PGA849 a versatile choice for virtually any sensor type. The low-noise current-feedback front-end architecture offers exceptional gain flatness even at high frequencies, making the PGA849 an excellent high-impedance sensor readout device. Integrated protection circuitry on the input pins handles overvoltages of up to ±40V beyond the power-supply voltages.
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* Data sheet PGA849 Low-Noise, Wide-Bandwidth, Precision Programmable Gain Instrumentation Amplifier datasheet PDF | HTML 29 Mar 2024
Product overview PGA855 and PGA849 Product Overview (Rev. A) PDF | HTML 11 Jul 2024
Application note Achieve High SNR with the PGA855, Fully Differential Programmable-Gain Amplifier PDF | HTML 21 Mar 2024
EVM User's guide PGA849 Evaluation Module User's Guide PDF | HTML 20 Mar 2024

Design & development

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Evaluation board

PGA849EVM — PGA849 evaluation module

The PGA849EVM provides access to the features and measures the performance of the PGA849 device. The PGA849 is a precision, wide-bandwidth programmable gain instrumentation amplifier (PGA) for differential to single-ended conversion optimized to drive high-performance analog-to-digital converters (...)
User guide: PDF | HTML
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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 (...)
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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 (...)
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Reference designs

TIDA-010945 — Precision signal chain for digital multimeters reference design

This reference design explains the theory, design and testing of a high-performance signal chain for DC measurements. The main target application is digital multimeters (DMMs), however the design can also be applicable to other applications, such as data acquisition (DAQ) and condition monitoring. (...)
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