1 Features
• 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

2 Applications
• Factory automation and control
• Analog input module
• Data acquisition (DAQ)
• Test and measurement
• Semiconductor test

3 Description
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.