Analog Devices Inc. LTC1096ACS8#PBF

Overview

LTC1096ACS8#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 draws only 80 μA during conversion at 5 V, powers down to 1 nA typical in shutdown, and achieves ±0.5 LSB total unadjusted error over temperature. It is used in battery-powered sensor monitoring where low quiescent current and direct high-impedance analog input are critical.

For engineers reviewing the LTC1096ACS8#PBF datasheet, LTC1096ACS8#PBF pinout, LTC1096ACS8#PBF application, or LTC1096ACS8#PBF equivalent, key selection criteria include its 16 μs conversion time, 33 kHz max sampling rate, 5 V operation capability, SO-8 package compatibility, and ratiometric operation with external reference or V_CC.

Technical Context

The LTC1096ACS8#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 rejection and operation with reduced full-scale spans as low as 250 mV.

It uses a synchronous 3-wire serial interface (CS/, CLK, DOUT) with data valid on CLK falling edges. Chip select controls power state: CS = low enables active conversion and serial transfer; CS = high forces automatic shutdown with 1 nA typical supply current and Hi-Z outputs.

Key Specifications

Pinout & Package

Package: 8-lead plastic SOIC (S8), 150°C maximum junction temperature, θ_JA = 175°C/W.

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 LTC1096ACS8#PBF uniquely balances 5 V compatibility, true differential input, sub-100 μA active current, and external reference flexibility-making it optimal for cost-sensitive, battery-operated sensor nodes requiring rail-to-rail analog interface and minimal BOM count.

Availability

LTC1096ACS8#PBF is available at Aetrix Electronics and suitable for battery-operated systems, remote data acquisition, and isolated data acquisition requiring stable component supply and long-term lifecycle support.

Supply support for LTC1096ACS8#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. (including legacy Linear Technology products) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and instrumentation applications.

The LTC1096 series was developed as a family of micropower 8-bit ADCs targeting ultra-low-power sensor interfacing, with emphasis on minimal external components, flexible reference options, and robust operation in noisy environments.

FAQ

What is the maximum clock frequency supported by LTC1096ACS8#PBF at 5 V?

The LTC1096ACS8#PBF supports a maximum clock frequency of 500 kHz when operated at 5 V. At this rate, the total cycle time is 29 μs, enabling a maximum sampling rate of 33 kHz. Exceeding 500 kHz may cause timing violations or increased conversion error beyond the specified ±0.5 LSB total unadjusted error.

Can LTC1096ACS8#PBF operate with a 2.5 V reference while powered from 5 V?

Yes, the LTC1096ACS8#PBF can operate with a 2.5 V external reference applied to the VREF pin while VCC is at 5 V. The device supports independent VREF and VCC voltages within their respective absolute maximum ratings, enabling precise ratiometric measurement with external references or sensor bridge excitation.

Does LTC1096ACS8#PBF require an external sample-and-hold circuit?

No, the LTC1096ACS8#PBF integrates a sample-and-hold function. Its switched-capacitor architecture captures the analog input during the first 1.5 clock cycles of each conversion sequence, eliminating the need for external S/H components and reducing system complexity and board space.

What is the wake-up time required after asserting CS/ before valid conversion data is available?

The LTC1096ACS8#PBF requires a 10 μs wake-up time from CS/ falling edge to the first CLK falling edge after the initial CLK rising edge. This delay ensures internal biasing and reference stabilization. If the clock frequency is ≤100 kHz, this wake-up time is inherently satisfied by the clock period.

How does the differential input of LTC1096ACS8#PBF improve noise immunity in sensor applications?

The differential input of the LTC1096ACS8#PBF rejects common-mode noise coupled into both +IN and –IN traces-such as EMI from motors or switching supplies-by measuring only the voltage difference between them. This allows reliable digitization of low-level sensor signals (e.g., thermocouples or bridge outputs) even in electrically noisy industrial environments.