PGA848 Low-Noise, Wide-Bandwidth, Scope Gain, Single-Ended Output,

Programmable Gain Instrumentation Amplifier

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 current-

feedback 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.

Package Information

PART NUMBER

PACKAGE(1)

PACKAGE SIZE(2)

PGA848

RGT (VQFN, 16)

3mm × 3mm

(1)

For more information, see Section 11.

(2)

The package size (length × width) is a nominal value and

includes pins, where applicable.

IN+

IN

+

–

PGA848

+

–

Gain

Network

OVP

OVP

V

S-

V

S+

V

LVDD

V

LVSS

R

R

R

R

+

–

REF

OUT

DAIN

DAIN+

ADC

IN

VDD

VSS

V

IN+

V

IN

V

IN

+

VS+

VS-

V

DGND

DGND

A<2:0>

LVSS

LVDD

V

OUT

V

REF

V

OUT = G × VIN +

V

REF

PGA848 Simplified Application

Frequency (Hz)

-80

-60

-40

-20

0

20

40

60

10

100

1k

10k

100k

1M

10M

G = 0.5

G = 1

G = 2

G = 5

G = 10

G = 20

G = 50

G = 100

Gain vs Frequency

PGA848

SBOSAN4 – AUGUST 2025

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. ADVANCE INFORMATION for preproduction products; subject to change

without notice.