Texas Instruments PGA207UA-2

Overview

PGA207UA-2 from Burr-Brown (now Texas Instruments) is a high-speed, digitally programmable gain instrumentation amplifier with FET inputs, ±40V input protection, 3.5µs settling to 0.01%, and selectable gains of 1, 2, 5, or 10 V/V in a 16-pin SOIC package - used for precision multiplexed data acquisition in medical and industrial sensor front-ends.

For engineers reviewing the PGA207UA-2 datasheet, PGA207UA-2 pinout, PGA207UA-2 application, or PGA207UA-2 equivalent, key selection criteria include gain-switching speed (500 ns), input bias current (≤100 pA), common-mode rejection (≥90 dB at G=4/5), and overvoltage survivability without power applied.

Technical Context

The PGA207UA-2 integrates three op-amps in an instrumentation topology with digitally controlled feedback networks, enabling true differential input operation and rail-to-rail output sensing via dedicated VO1/VO2 pins. Its FET-input stage ensures ultra-low IB (≤100 pA) and high impedance (10¹³ Ω || 1 pF), critical for high-Z sensor interfaces.

Gain selection uses two TTL/CMOS-compatible address lines (A0, A1) that directly control internal resistor networks - no latching required - with immediate switching (<500 ns) and full settling in ≤3.5 µs. Input overload protection operates independently of supply voltage, sustaining ±40V inputs even with V_S = 0.

Key Specifications

Pinout & Package

SOL-16 surface-mount package (JEDEC MS-012, TI drawing DW), 10.3 mm × 7.5 mm body, 1.75 mm height, gull-wing leads, RoHS-compliant NIPDAU-DCC finish, MSL Level-3 (260°C, 168 hr).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable-gain instrumentation amplifier applications.

Compared with INA128UA and AD8253ARMZ, PGA207UA-2 uniquely balances TTL-compatible digital gain control, sub-4 µs settling, and ±40 V input survivability in a single SOIC package - making it optimal for cost-sensitive, high-channel-count, fault-tolerant DAQ where gain agility and ruggedness are co-primary requirements.

Availability

PGA207UA-2 is available at Aetrix Electronics and suitable for medical physiological monitoring, multiplexed industrial data acquisition, PC-based sensor interface cards, and high-impedance analytical instrumentation requiring stable component supply and long-lifecycle support.

Supply support for PGA207UA-2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Burr-Brown Corporation, acquired by Texas Instruments in 2000, specialized in high-precision analog signal-conditioning ICs for test, measurement, and industrial control systems.

The PGA207 product line was designed specifically for high-speed, multi-channel data acquisition systems requiring robust input protection, fast settling, and digitally reconfigurable gain - targeting medical, scientific, and automated test equipment markets.

FAQ

What are the exact gain settings supported by the PGA207UA-2?

The PGA207UA-2 supports four discrete, laser-trimmed gain values: 1 V/V, 2 V/V, 5 V/V, and 10 V/V. These are selected via binary combinations of the A0 and A1 digital inputs (00=1, 01=2, 10=5, 11=10). Unlike the PGA206UA-2 (which offers 1/2/4/8 V/V), the PGA207UA-2's 5× and 10× gains provide better resolution for mid-range sensor outputs. All gains are specified over the full –40°C to +85°C temperature range.

Does the PGA207UA-2 require external components for basic operation?

The PGA207UA-2 operates autonomously with only power supplies (±4.5 V to ±18 V), decoupling capacitors (recommended: 1 µF per supply), and digital address lines (A0/A1). No external gain-setting resistors, feedback networks, or offset trim components are needed for nominal use. Optional VOS adjustment (via pins 8 and 9) and shield drive (using VO1/VO2) are application-specific enhancements - not required for standard instrumentation amplifier functionality.

Can the PGA207UA-2 survive input overvoltage when unpowered?

Yes - the PGA207UA-2 features intrinsic ±40 V input protection that remains fully functional even with V+ and V– disconnected or at 0 V. This is achieved via internal series current-limiting circuitry and clamp structures independent of the amplifier's bias network. The device will not latch up or suffer permanent damage under such conditions, making it ideal for systems where sensor wiring may be hot-plugged or exposed to field transients prior to power-up.

How does the PGA207UA-2 handle multiplexed input channel switching?

The PGA207UA-2 is optimized for multiplexed DAQ: its 3.5 µs settling time to 0.01% enables rapid channel cycling without residual error, while FET inputs (≤100 pA IB) prevent charge injection errors from analog switches. For best results, route differential input pairs adjacently over a ground plane, use guarded traces between channels, and add small RC filters (e.g., 1 kΩ + 1 nF) at inputs to suppress multiplexer-induced glitches - all validated in Figure 4 of the PGA207UA-2 datasheet.

What is the function of the VO1 and VO2 pins on the PGA207UA-2?

VO1 and VO2 are the buffered outputs of the two input-stage amplifiers (A1 and A2) inside the PGA207UA-2. They are not intended as primary signal outputs but serve critical diagnostic and enhancement functions: (1) detecting input-stage saturation during overvoltage events, and (2) driving active shields (e.g., in ECG electrode cables) to reduce cable capacitance effects. Connecting VO1/VO2 to shield layers improves common-mode rejection and bandwidth - a technique explicitly documented in Figure 5 of the PGA207UA-2 datasheet.