Analog Devices Inc. LTC1096AIS8#TRPBF

Overview

LTC1096AIS8#TRPBF from Analog Devices (formerly Linear Technology) is a micropower 8-bit successive approximation ADC with integrated sample-and-hold, single differential analog input, and 3-wire serial interface. It draws only 80 μA during conversion at 5 V, drops to 1 nA in shutdown, achieves ±0.5 LSB total unadjusted error over temperature, and operates from –40°C to +85°C in an 8-lead SOIC package - ideal for battery-powered sensor monitoring and isolated data acquisition.

For engineers reviewing the LTC1096AIS8#TRPBF datasheet, LTC1096AIS8#TRPBF pinout, LTC1096AIS8#TRPBF application, or LTC1096AIS8#TRPBF equivalent, key selection criteria include its 16 μs conversion time, 33 kHz max sampling rate, 5 V operation capability, differential input architecture, and automatic power-down behavior triggered by CS/SHDN high.

Technical Context

The LTC1096AIS8#TRPBF implements a switched-capacitor SAR architecture with on-chip sample-and-hold, enabling precise ratiometric or externally referenced measurements. Its differential input supports common-mode voltage rejection and direct connection to transducers without gain stages.

It uses a synchronous 3-wire serial interface (CS/SHDN, CLK, DOUT) where data is clocked out on falling CLK edges. Wake-up requires 10 μs after CS↓ before first CLK↓, and it supports clock frequencies up to 500 kHz at 5 V - enabling efficient microcontroller interfacing with minimal I/O overhead.

Key Specifications

Pinout & Package

Package: 8-lead plastic SOIC (S8), –40°C to +85°C operating temperature range, 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 LTC1096AIS8#TRPBF uniquely combines differential input, external VREF support, sub-100 μA active current, and true 1 nA shutdown - making it optimal for precision, low-power, isolated, or battery-operated differential sensing where 8-bit resolution is sufficient.

Availability

LTC1096AIS8#TRPBF is available at Aetrix Electronics and suitable for battery monitoring, isolated data acquisition, and remote sensor systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC1096AIS8#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 technologies, serving industrial, automotive, communications, and healthcare markets.

The LTC1096 series belongs to ADI's legacy micropower precision ADC product line, designed specifically for ultra-low-power, high-accuracy data acquisition in space-constrained and energy-limited applications such as portable instrumentation and remote sensors.

FAQ

What is the maximum sampling frequency supported by the LTC1096AIS8#TRPBF?

The LTC1096AIS8#TRPBF supports a maximum sampling frequency of 33 kHz at 5 V supply and 500 kHz clock frequency. At lower supply voltages (e.g., 3 V), the maximum sampling rate reduces to 16.5 kHz due to slower internal switching. This limit is defined by the 8-clock-cycle conversion time and minimum clock period requirements specified in the datasheet.

Does the LTC1096AIS8#TRPBF require an external reference voltage?

Yes, the LTC1096AIS8#TRPBF requires an external reference voltage applied to the VREF pin to define its full-scale range. It supports ratiometric operation (using V_CC as reference) or precision external references (e.g., 2.5 V or 5 V). The VREF pin accepts voltages from –0.05 V to V_CC + 0.05 V, enabling flexible scaling down to 250 mV full-scale spans.

How does the shutdown mode work on the LTC1096AIS8#TRPBF?

The LTC1096AIS8#TRPBF enters shutdown mode when the CS/SHDN pin is driven high, reducing supply current to 1 nA typical. No additional control signals or configuration registers are needed - the device automatically powers down all internal circuitry except leakage paths. Wake-up occurs within 10 μs after CS/SHDN goes low, provided the first CLK falling edge follows that transition.

Can the LTC1096AIS8#TRPBF interface directly with a microcontroller's SPI peripheral?

The LTC1096AIS8#TRPBF uses a 3-wire synchronous serial interface (CS/SHDN, CLK, DOUT) that is SPI-compatible in master-out-slave-in (MOSI) mode but lacks a dedicated data input (DIN) pin. It can be interfaced with standard SPI hardware by configuring the MCU as master with MOSI disabled and using GPIO for CS/SHDN control - no protocol translation is required.

What is the analog input voltage range specification for the LTC1096AIS8#TRPBF?

The LTC1096AIS8#TRPBF analog input range is specified as –0.05 V to V_CC + 0.05 V for both IN+ and IN– pins. This allows operation with input signals slightly beyond the supply rails, accommodating small transients or offsets. For guaranteed correct codes across the full 0 V to V_REF range, V_CC must exceed V_REF by at least 50 mV to avoid diode conduction at the input protection clamps.