Analog Devices Inc. LT1996IDD#PBF

Overview

LT1996IDD#PBF from Analog Devices (acquired Linear Technology) is a precision, micropower, gain-selectable difference amplifier IC integrating eight matched SiChrome resistors and a low-offset op amp in a single 10-lead DFN package. It delivers gain accuracy <0.05%, CMRR >80 dB at G=9, rail-to-rail output swing within 40 mV of rails, and operates from 2.7 V single or ±18 V split supply - ideal for high-accuracy differential sensing in portable medical instrumentation.

For engineers reviewing the LT1996IDD#PBF datasheet, LT1996IDD#PBF pinout, LT1996IDD#PBF application, or LT1996IDD#PBF equivalent, key selection criteria include verified resistor matching (±0.03% max at G=9), guaranteed gain drift <3 ppm/°C, input common-mode range up to ±60 V on P9/M9 pins, and confirmed operation across –40°C to 85°C industrial temperature range.

Technical Context

The LT1996IDD#PBF implements a fully integrated difference amplifier topology where internal 450 kΩ-based resistor networks (450k/9, 450k/27, 450k/81, and 450k) set precise gain configurations without external components. Its op amp core features 15 µV typical offset voltage, 3 nA input bias current, and 560 kHz gain-bandwidth product.

Pin configuration determines function: P9/M9 enable G=±9, P27/M27 enable G=±27, P81/M81 enable G=±81, and REF sets output common-mode level. Input impedance varies by configuration - e.g., 350 kΩ on P9 with M9 grounded - and output remains rail-to-rail under 1 mA load.

Key Specifications

Pinout & Package

LT1996IDD#PBF uses a 10-lead (3 mm × 3 mm) plastic DFN package with underside metal pad connected to VEE (optional PCB connection). Thermal resistance θ_JA = 160°C/W; max junction temperature = 125°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LT1996CDD#PBF, the LT1996IDD#PBF offers guaranteed –40°C to 85°C operation and tighter gain error (±0.03% vs ±0.04%), critical for field-deployed medical devices; versus AD8277ARZ, it provides 10× gain configurability, 25% lower supply current, and DFN space savings - but requires careful pin-strapping for desired gain.

Availability

LT1996IDD#PBF is available at Aetrix Electronics and suitable for handheld instrumentation, medical diagnostics, and industrial process monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LT1996IDD#PBF 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

Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, acquired Linear Technology in 2017 to expand precision signal conditioning capabilities.

The LT1996 product line was designed by Linear Technology (now ADI) to eliminate external precision resistors in instrumentation-grade amplifiers, targeting applications demanding <0.05% gain accuracy, ultra-low drift, and flexible gain configuration in minimal board area.

FAQ

What is the maximum common-mode voltage supported by LT1996IDD#PBF on its P9 and M9 pins?

The LT1996IDD#PBF supports ±60 V common-mode voltage on P9 and M9 pins when P81 and M81 are grounded and supply is ±15 V. This capability enables direct interfacing with high-voltage industrial sensors without external attenuators or protection circuitry, preserving signal integrity and reducing component count in the LT1996IDD#PBF signal chain.

Does LT1996IDD#PBF require external resistors to achieve gain settings like G=9 or G=81?

No, the LT1996IDD#PBF does not require external resistors for standard gain configurations. Its internal precision SiChrome resistor network (450k/9, 450k/27, 450k/81, and 450k) enables G=±9, ±27, and ±81 difference amplifier operation with only pin-strapping - no external components needed. This integration is a core feature of the LT1996IDD#PBF design.

What is the guaranteed gain error specification for LT1996IDD#PBF at G=9 over temperature?

The LT1996IDD#PBF guarantees a gain error of ±0.03% maximum at G=9 across the full –40°C to 85°C operating temperature range. This specification is validated per the datasheet's electrical characteristics table for LT1996ADD grade parts and ensures predictable performance in uncontrolled thermal environments without calibration.

Can LT1996IDD#PBF be used in single-supply 3.3 V systems?

Yes, the LT1996IDD#PBF operates from a minimum 2.7 V single supply and is fully specified at 3 V, 5 V, and ±15 V. At 3.3 V, it delivers rail-to-rail output swing (within 65 mV of rails), 100 µA supply current, and maintains CMRR >75 dB at G=9 - making it suitable for low-voltage portable electronics where the LT1996IDD#PBF's micropower and precision are critical.

How does the resistor matching specification of LT1996IDD#PBF impact CMRR in difference amplifier mode?

The LT1996IDD#PBF's resistor matching of ±0.03% at G=9 directly enables its guaranteed 90 dB CMRR at that gain setting. Since CMRR degradation is dominated by resistor mismatch in difference amplifiers, this tight matching ensures rejection of >99.988% of common-mode interference - a key performance differentiator of the LT1996IDD#PBF in noisy industrial or medical signal chains.