Programmable Gain Amplifier (PGA)

Product Specifications

Technical details and manufacturing context for Programmable Gain Amplifier (PGA)

Definition

A Programmable Gain Amplifier (PGA) is a component used in analog front-end (AFE) systems to condition weak signals from sensors or transducers. Its primary function is to amplify these signals to a level suitable for an analog-to-digital converter (ADC). The gain is adjustable via digital control signals, typically from a microcontroller, allowing the system to handle a wide dynamic range without saturation or loss of resolution. This improves measurement accuracy and flexibility. The PGA typically consists of an operational amplifier core with a programmable resistor network, such as an R-2R ladder or switched resistor array, in its feedback loop. A digital input code selects different resistor ratios, setting the closed-loop gain (e.g., 1, 2, 4, 8). Some PGAs use fully differential architectures or chopper stabilization to reduce noise and offset. The digital interface receives commands to switch between preset gain levels in real time. Key parameters include supply voltage (2.7–5.5 V), gain range (0.1–1000 V/V), gain error (±0.05% typical at 25°C), bandwidth (10–100 MHz depending on gain), input offset voltage (±0.5 mV max), input bias current (±10 pA typical), output voltage swing (0.05–4.95 V rail-to-rail), slew rate (20–100 V/µs at gain 1), operating temperature (-40 to 85°C), power dissipation (5–50 mW at 5V), package options (SOIC-8, MSOP-8), and ESD rating (±2 kV HBM per IEC 61000-4-2). These values are typical ranges and must be verified for the specific model. The PGA is used in applications such as data acquisition, instrumentation, and sensor interfaces. When selecting a PGA, consider gain range, accuracy, bandwidth, and power consumption. Verify all specifications with the manufacturer's datasheet.

Working Principle

The PGA uses an operational amplifier with a programmable feedback network. A digital code selects resistor ratios, setting the gain. The input signal is amplified accordingly. Some designs use differential or chopper-stabilized architectures to improve performance. The digital interface allows real-time gain adjustment.

Common Materials

Silicon (Semiconductor), Gold or Aluminum (Interconnects), Plastic or Ceramic (Package)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Supply Voltage	2.7–5.5 V	Operating range for single-supply applications
Gain Range	0.1–1000 V/V	Programmable in binary steps
Gain Error	±0.05 %	At 25°C, typical
Bandwidth	10–100 MHz	Depends on gain setting
Input Offset Voltage	±0.5 mV	Maximum over temperature
Input Bias Current	±10 pA	Typical at 25°C
Output Voltage Swing	0.05–4.95 V	Rail-to-rail output
Slew Rate	20–100 V/µs	At gain of 1
Operating Temperature	-40–85 °C	Industrial grade
Power Dissipation	5–50 mW	At 5V supply, typical
Package	SOIC-8, MSOP-8	Standard surface-mount
ESD Rating	±2 kV	HBM modelIEC 61000-4-2

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Operational Amplifier Core Part
Provides the fundamental amplification; its characteristics define the PGA's speed, noise, and precision.

Material: Silicon
Programmable Resistor Network
A network of resistors and switches (e.g., CMOS switches) that is reconfigured digitally to set the feedback ratio and thus the gain.

Material: Polysilicon, Metal (for resistors and interconnects)
Digital Interface & Control Logic
Receives and decodes digital gain-select signals (e.g., parallel or serial input like SPI/I²C) to control the resistor network switches.

Material: Silicon (CMOS logic)

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Analog Front-End (AFE)

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Analog Front End

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Manufacturers of Programmable Gain Amplifier (PGA)

Manufacturer profiles associated with Programmable Gain Amplifier (PGA).

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 6 September 2026

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Frequently Asked Questions

What is the primary function of a PGA?

A PGA amplifies weak analog signals to a level suitable for an ADC, with gain adjustable via digital control.

How is the gain set in a PGA?

Gain is set by a digital code that selects resistor ratios in the feedback network, such as an R-2R ladder.

What are typical supply voltage and gain range?

Supply voltage is typically 2.7–5.5 V, and gain range is 0.1–1000 V/V, but verify for the specific model.

What should I verify before selecting a PGA?

Check the datasheet for exact gain error, bandwidth, offset voltage, and other parameters, as values vary by model.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	N/A (electronic component, not pressure-sensitive)
other spec:	Supply Voltage: ±2.25V to ±18V, Gain Range: 1 to 1000 V/V, Bandwidth: 1 MHz to 100 MHz depending on gain setting
temperature:	-40°C to +125°C (industrial grade)

Programmable Gain Amplifier (PGA)

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards