Texas Instruments INA2133UAE4

Overview

INA2133UAE4 from Texas Instruments is a dual-channel, high-speed precision difference amplifier designed for accurate differential signal conditioning in industrial measurement systems. It delivers ±450 μV maximum offset voltage, 1.5 MHz bandwidth, and ±2.25 V to ±18 V dual-supply operation - enabling precise current sensing and sensor signal extraction in battery test equipment and servo feedback loops.

For engineers reviewing the INA2133UAE4 datasheet, INA2133UAE4 pinout, INA2133UAE4 application, or INA2133UAE4 equivalent, key selection criteria include guaranteed CMRR ≥80 dB over temperature, fast 5.5 μs settling to 0.01%, and SOIC-14 package compatibility with industrial PCB layouts requiring dual-channel isolation and rail-to-rail input common-mode range beyond supply rails.

Technical Context

The INA2133UAE4 integrates two independent, laser-trimmed precision op-amps with matched on-chip 25 kΩ resistor networks per channel - enabling unity-gain difference amplification without external components while maintaining tight gain error (±0.05%) and low drift (±5 μV/°C). Its internal architecture supports wide input common-mode voltage range (2×V− +3 V to 2×V+ −3 V) and operates across ±2.25 V to ±18 V supplies.

Each channel features fully isolated circuitry: no crosstalk between Channel A and Channel B even under overload or short-circuit conditions. The device uses bipolar (CSO: SHE) or CMOS (CSO: RFB) process variants - with slew rate differing by variant (5 V/μs vs 20 V/μs), but all specifications including bandwidth, offset, and CMRR validated for both.

Key Specifications

Pinout & Package

INA2133UAE4 is housed in a 14-pin SOIC (D) surface-mount package measuring 8.65 mm × 6.00 mm, rated for −40°C to +85°C industrial operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar difference amplifier applications.

Compared with INA2133UAE4, INA2134UA trades power efficiency for speed, while AD8276ARZ sacrifices channel integration and reference flexibility for superior offset performance - making INA2133UAE4 the optimal balance for industrial dual-signal acquisition where layout simplicity, thermal tracking, and supply headroom are critical.

Availability

INA2133UAE4 is available at Aetrix Electronics and suitable for battery test systems, servo drives, sensor data loggers, and solar string inverters requiring stable component supply across multi-year production cycles.

Supply support for INA2133UAE4 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

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision signal conditioning ICs.

The INA2133UAE4 belongs to TI's INAx133 family of high-speed difference amplifiers, engineered specifically for industrial measurement systems demanding rail-to-rail input range, low drift, and dual-channel independence without crosstalk.

FAQ

What is the maximum input common-mode voltage range supported by the INA2133UAE4?

The INA2133UAE4 supports an input common-mode voltage range from 2×V− +3 V to 2×V+ −3 V. For example, with ±15 V supplies, this extends from −27 V to +27 V - enabling direct measurement of signals beyond the supply rails. This capability is confirmed in Section 5.4 of the SBOS115B datasheet and applies to both channels independently in the INA2133UAE4.

Does the INA2133UAE4 require external resistors to configure gain?

No, the INA2133UAE4 does not require external resistors for unity-gain difference amplification. It integrates four laser-trimmed 25 kΩ on-chip resistors per channel, configured internally for precise G = 1 operation. External resistors are unnecessary unless non-unity gain configurations are needed - which is not supported by the fixed internal topology of the INA2133UAE4.

Can both channels of the INA2133UAE4 operate simultaneously without performance degradation?

Yes, both channels of the INA2133UAE4 operate fully independently with zero crosstalk. The datasheet explicitly states that "all circuitry is completely independent in the dual version" and confirms normal behavior even when one amplifier is overdriven or short-circuited. This is verified in Section 7.1 and Figure 7-26 layout guidelines for the INA2133UAE4.

What is the guaranteed settling time specification for the INA2133UAE4?

The INA2133UAE4 has a guaranteed settling time of 5.5 μs to 0.01% for a 10 V step input with 100 pF load capacitance, as specified in Section 5.4 Electrical Characteristics. This value is production-tested and applies across the full operating temperature range (−40°C to +85°C) and supply voltages (±2.25 V to ±18 V) for the INA2133UAE4.

Is the INA2133UAE4 pin-compatible with other members of the INAx133 family?

The INA2133UAE4 is pin-compatible with the INA2133UA and INA2133U variants in the SOIC-14 package, sharing identical pin functions and layout requirements. However, it is not pin-compatible with the single-channel INA133 (SOIC-8) or with later-generation devices like the INA2134. Pin compatibility is confirmed in Tables 4-1 and 4-2 of the SBOS115B datasheet for the INA2133UAE4.