Calculation tool
PGA85X-INPUT-OUTPUT-RANGE-DESIGN-CALC — PGA85x input and output range design calculator
PGA85X-INPUT-OUTPUT-RANGE-DESIGN-CALC
PGA855
Low-noise, wide-bandwidth, fully-differential-output programmable-gain instrumentation amplifier
Data sheet
PGA855
- Eight pin-programmable binary gains
- G (V/V) = ⅛, ¼, ½, 1, 2, 4, 8, and 16
- Low gain error drift: 1 ppm/°C (max) at G = 1 V/V
- Fully differential outputs
- Independent output power-supply pins to allow for ADC input overdrive protection
- Output common-mode control
- Faster signal processing:
- Wide bandwidth: 10 MHz at all gains
- High slew rate: 35 V/µs
- Settling time: 500 ns to 0.01%, 950 ns to 0.0015%
- Input stage noise: 7.8 nV/√ Hz at G = 16 V/V
- Filter option to achieve better SNR
- Input overvoltage protection to ±40 V beyond supplies
- Input-stage supply range:
- Single supply: 8 V to 36 V
- Dual supply: ±4 V to ±18 V
- Output-stage supply range:
- Single supply: 4.5 V to 36 V
- Dual supply: ±2.25 V to ±18 V
- Specified temperature range: –40°C to +125°C
- Small package: 3-mm × 3-mm VQFN
The PGA855 is a high-bandwidth programmable gain instrumentation amplifier with fully differential outputs. The PGA855 is equipped with eight binary gain settings, from an attenuating gain of 0.125 V/V to a maximum of 16 V/V, using three digital gain selection pins. The output common-mode voltage can be independently set using the VOCM pin.
The PGA855 architecture is optimized to drive inputs of high-resolution, precision analog-to-digital converters (ADCs) with sampling rates up to 1 MSPS without the need for an additional ADC driver. The output-stage power supplies (LVSS/LVDD) are decoupled from the input stage and can be connected to power supplies of the ADC 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 0.3 pA/√ Hz, making the PGA855 a versatile choice for virtually any sensor type. The low-noise current-feedback front-end architecture offers excellent gain flatness, even at high frequencies, making the PGA855 an excellent high-impedance sensor readout device. Integrated protection circuitry on the input pins handles overvoltages up to ±40 V beyond the power-supply voltages.
Technical documentation
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View all 5 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | PGA855 Low-Noise, Wide-Bandwidth, Fully Differential Output Programmable-Gain Instrumentation Amplifier datasheet (Rev. B) | PDF | HTML | 27 Sep 2023 |
| Application note | Achieve High SNR with the PGA855, Fully Differential Programmable-Gain Amplifier | PDF | HTML | 21 Mar 2024 | |
| Product overview | PGA855 and PGA849 Product Overview | PDF | HTML | 21 Feb 2024 | |
| EVM User's guide | PGA855 Evaluation Module User's Guide (Rev. A) | PDF | HTML | 25 Sep 2023 | |
| Product overview | PLC Analog Input Front-End Architectures | PDF | HTML | 31 Jul 2022 |
Design & development
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Evaluation board
PGA855EVM — PGA855 evaluation module for fully-differential-output programmable-gain instrumentation amplifier
The PGA855 evaluation module (EVM) is a development platform for evaluating the PGA855, which is a high-precision programmable-gain amplifier with differential outputs. PGA855 is optimized to drive inputs of high-performance analog-to-digital converters (ADCs) with fully differential inputs.
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 (...)
User guide: PDF
| Package | Pins | Download |
|---|---|---|
| VQFN (RGT) | 16 | View options |
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