1 Features
• Eight pin-programmable decade (scope) gains
– G (V/V) = ½, 1, 2, 5, 10, 20, 50, and 100
• Fully differential outputs
• Output common-mode control
• Low gain error drift: ±2ppm/°C (maximum)
• Faster signal processing:
– Wide bandwidth: 6.2MHz (G < 10), 2.4MHz
(G = 50, 100)
– High slew rate: 45V/μs at all gains
– Settling time: 750ns to 0.01% (G < 20)
– Input stage noise: 8.8nV/√Hz at G > 10V/V
– Filter option to achieve better SNR
• Input overvoltage protection to ±40V beyond
supplies
• Input-stage supply range:
– Single supply: 9V to 36V
– Dual supply: ±4.5V 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 VQFN

2 Applications
• Factory automation and control
• Analog input module
• Data acquisition (DAQ)
• Test and measurement
• Parametric measurement unit (PMU)

3 Description
The PGA854 is a wide-bandwidth, high-voltage, lownoise
programmable gain instrumentation amplifier
with differential output. The PGA854 is equipped
with eight decade (scope) gain settings, from an
attenuating gain of 0.5V/V to a maximum of 100V/V.
Gain is set using three digital gain selection pins.
The PGA854 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 devices
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 PGA854 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 PGA854 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.