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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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Data sheet Order now

Product details

PGA/VGA PGA Number of channels 1 Digital interface Pin programmable Vs (max) (V) 36 Vs (min) (V) 8 Input type Bipolar, Overvoltage Tolerant 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 Gain (max) (dB) 16 Gain drift (max) (ppm/°C) 2 Rating Catalog Architecture High Input Impedance Operating temperature range (°C) -40 to 125
PGA/VGA PGA Number of channels 1 Digital interface Pin programmable Vs (max) (V) 36 Vs (min) (V) 8 Input type Bipolar, Overvoltage Tolerant 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 Gain (max) (dB) 16 Gain drift (max) (ppm/°C) 2 Rating Catalog Architecture High Input Impedance 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
EVM User's guide PGA849 Evaluation Module User's Guide PDF | HTML 20 Mar 2024
Product overview PGA855 and PGA849 Product Overview PDF | HTML 21 Feb 2024

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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 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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