1 Features
• Differential to single-ended conversion
• Eight pin-programmable decade (scope) gains
– G (V/V) = ½, 1, 2, 5, 10, 20, 50, and 100
• Low gain error drift: ±2ppm/°C (maximum)
• Faster signal processing:
– Wide bandwidth: 6.2MHz (G < 10), 2.4MHz (G
= 50, 100)
– Input stage noise: 8.5nV/√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 controls
• Analog input modules
• Data acquisition (DAQ)
• Test and measurement
• Parametric measurement units (PMU)

3 Description
The PGA848 is a wide-bandwidth, low-noise
programmable gain instrumentation amplifier for
differential-to-single-ended conversion. The PGA848
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 PGA848 architecture is optimized to drive
inputs of high-resolution, precision analog-to-digital
converters (ADCs) with sampling rates up to 1MSPS
without additional ADC drivers. 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.
This capability makes the PGA848 a versatile choice
for virtually any sensor type. The low-noise currentfeedback
front-end architecture offers exceptional
gain flatness even at high frequencies, making the
PGA848 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.