Analog Devices Inc. LTC1096IS8#PBF

Overview

LTC1096IS8#PBF from Analog Devices (formerly Linear Technology) is a micropower 8-bit successive approximation analog-to-digital converter with integrated sample-and-hold, single differential analog input, and 3-wire serial interface. It operates from 3V to 9V supply, draws only 80 μA during conversion at 33 kHz sampling rate, and auto-shuts down to 1 nA when idle. It is used in battery-powered sensor monitoring systems where low quiescent current and direct high-impedance analog input are critical.

For engineers reviewing the LTC1096IS8#PBF datasheet, LTC1096IS8#PBF pinout, LTC1096IS8#PBF application, or LTC1096IS8#PBF equivalent, key selection criteria include its 80 μA active supply current, ±0.5 LSB total unadjusted error over temperature, 16 μs conversion time, 8-pin SOIC package, and compatibility with ratiometric or external reference configurations.

Technical Context

The LTC1096IS8#PBF implements a switched-capacitor SAR architecture with on-chip sample-and-hold, enabling accurate DC and low-frequency signal digitization without external hold circuitry. Its differential input stage supports common-mode voltage tracking and operation with reduced full-scale spans as low as 250 mV.

It uses a synchronous 3-wire serial interface (CS/SHDN, CLK, DOUT) with data valid on CLK falling edges. Wake-up from shutdown requires a 10 μs delay between CS↓ and first CLK↓ after initial CLK↑, and it supports clock frequencies up to 500 kHz at 5 V or 250 kHz at 3 V.

Key Specifications

Pinout & Package

Package: 8-lead plastic SOIC (S8), –40°C to +85°C operating temperature range.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit micropower ADC applications.

Compared with ADS7822U and MAX11100ASA+, the LTC1096IS8#PBF uniquely combines true differential input, external reference support, and 1 nA shutdown-making it optimal for low-power, ratiometric, and floating-sensor applications where supply voltage may exceed 3.6 V.

Availability

LTC1096IS8#PBF is available at Aetrix Electronics and suitable for battery monitoring, isolated data acquisition, and remote environmental sensing requiring stable component supply across extended temperature ranges (–40°C to +85°C).

Supply support for LTC1096IS8#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, formed through the acquisition of Linear Technology in 2017.

The LTC1096IS8#PBF belongs to ADI's legacy Linear Technology micropower precision ADC family, designed specifically for energy-constrained systems requiring high accuracy, low supply current, and robust analog input handling in harsh environments.

FAQ

What is the maximum sampling frequency of the LTC1096IS8#PBF?

The LTC1096IS8#PBF supports a maximum sampling frequency of 33 kHz at 5 V supply and 500 kHz clock, or 16.5 kHz at 3 V and 250 kHz clock. This is defined by its 8-clock-cycle conversion time and minimum cycle time specifications, enabling real-time digitization of signals up to ~16.5 kHz bandwidth while maintaining ±0.5 LSB accuracy.

Does the LTC1096IS8#PBF require an external reference voltage?

Yes, the LTC1096IS8#PBF requires an external reference voltage applied to the V_REF pin. It supports ratiometric operation (e.g., with bridge sensors) or precision external references from 2.5 V to 5 V. The device does not include an internal reference, so V_REF must be stable and low-noise to achieve specified ±0.5 LSB total unadjusted error.

Can the LTC1096IS8#PBF operate from a 3.3V supply?

Yes, the LTC1096IS8#PBF operates from 3 V to 9 V, fully supporting 3.3 V nominal supplies. At 3.3 V, it maintains 80 μA max supply current and ±0.5 LSB total unadjusted error over temperature, with clock frequency limited to 250 kHz and minimum analog input range of –0.05 V to 3.35 V.

What is the purpose of the CS/SHDN pin on the LTC1096IS8#PBF?

The CS/SHDN pin on the LTC1096IS8#PBF serves as both chip select and shutdown control. When driven low, it enables conversion and serial communication; when high, it disconnects internal power rails, reducing supply current to 1 nA typical. This dual function eliminates need for external power switches and simplifies low-power system design.

How does the differential input of the LTC1096IS8#PBF improve measurement accuracy?

The differential input (+IN/–IN) of the LTC1096IS8#PBF rejects common-mode noise and enables measurement of signals referenced to non-ground potentials. This allows direct interfacing with floating sensors (e.g., half-bridge strain gauges) and improves immunity to EMI in noisy industrial environments-preserving ±0.5 LSB accuracy without external instrumentation amplifiers.