Analog Devices Inc. LTC1096ACS8#TRPBF

Overview

LTC1096ACS8#TRPBF 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, achieves ±0.5 LSB total unadjusted error over temperature, and operates in 8-pin SOIC package. It is used in battery-powered remote sensor nodes requiring low-power ratiometric measurement.

For engineers reviewing the LTC1096ACS8#TRPBF datasheet, LTC1096ACS8#TRPBF pinout, LTC1096ACS8#TRPBF application, or LTC1096ACS8#TRPBF equivalent, key selection criteria include its 16 μs conversion time, 33 kHz max sampling rate, 5 V supply compatibility, differential input architecture, and shutdown current spec - all critical for ultra-low-power embedded data acquisition systems.

Technical Context

The LTC1096ACS8#TRPBF implements a switched-capacitor SAR ADC architecture with on-chip sample-and-hold and internal bias generation. Its differential input stage supports common-mode voltage tracking up to V_CC, enabling direct connection to floating transducers without level-shifting circuitry.

It uses a synchronous 3-wire serial interface (CS/, CLK, DOUT) with MSB-first transmission synchronized to falling clock edges. Wake-up timing requires ≥10 μs from CS↓ to first CLK↓ after initial CLK↑, and it supports external reference voltages from 2.5 V to 5 V while maintaining full-scale accuracy.

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#TRPBF uniquely balances 5 V compatibility, true differential input, and 1 nA shutdown - making it optimal for cost-sensitive, battery-powered industrial sensors where common-mode rejection and minimal quiescent drain are non-negotiable.

Availability

LTC1096ACS8#TRPBF is available at Aetrix Electronics and suitable for battery-operated systems, remote data acquisition, and isolated data acquisition requiring stable component supply across extended production lifecycles.

Supply support for LTC1096ACS8#TRPBF 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 LTC1096 series belongs to ADI's legacy micropower precision ADC product line, designed specifically for ultra-low-power sensor interfacing in portable, remote, and energy-constrained industrial and medical applications.

FAQ

What is the minimum supply voltage required for reliable operation of the LTC1096ACS8#TRPBF?

The LTC1096ACS8#TRPBF requires a minimum supply voltage of 3.0 V for guaranteed operation across its full temperature range. At 25°C, it may function down to ~2.8 V, but the datasheet specifies 3.0 V as the absolute minimum under all conditions. The LTC1096L variant supports 2.65 V, but LTC1096ACS8#TRPBF is the standard 5 V-compatible version and must not be operated below 3.0 V.

Does the LTC1096ACS8#TRPBF support an external reference voltage, and what is its valid range?

Yes, the LTC1096ACS8#TRPBF supports an external reference voltage applied to the VREF pin. Its valid range is –0.05 V to V_CC + 0.05 V, with guaranteed performance for references from 2.5 V to 5.0 V when V_CC = 5 V. For example, with V_CC = 5.0 V, a 2.5 V reference yields a 2.5 V full-scale range, enabling 10 mV LSB resolution.

How does the LTC1096ACS8#TRPBF achieve its 1 nA shutdown current, and what pin controls it?

The LTC1096ACS8#TRPBF achieves 1 nA shutdown current by internally disconnecting power to the analog core, reference buffer, and serial interface when the CS/SHDN pin (Pin 1) is driven high. This is not a software-controlled sleep mode but a hardware-level power gate - ensuring leakage is minimized without MCU intervention. Pulling CS/SHDN high is the sole requirement to enter this ultra-low-current state.

Can the LTC1096ACS8#TRPBF interface directly with a 3.3 V microcontroller's GPIO pins?

Yes, the LTC1096ACS8#TRPBF's digital I/O (CS/, CLK, DOUT) are fully compatible with 3.3 V logic levels when V_CC = 5 V: VIH is specified at 2.0 V min and VOL at 0.4 V max, satisfying 3.3 V MCU input thresholds. However, DOUT high-level voltage is 4.5 V min at 5 V V_CC, so a level shifter or series resistor is recommended if connecting to 3.3 V-only inputs to avoid overstress.

What is the maximum clock frequency supported by the LTC1096ACS8#TRPBF, and how does it affect conversion accuracy?

The LTC1096ACS8#TRPBF supports a maximum clock frequency of 500 kHz at V_CC = 5 V. Operating above this frequency risks violating internal timing margins, leading to increased missing-code probability and degraded INL/DNL. At 500 kHz, conversion completes in 16 μs (8 clock cycles × 2 μs period); reducing clock frequency linearly increases conversion time but improves SNR marginally due to longer sampling aperture.