Analog Devices Inc. LTC1096IN8#PBF

Overview

LTC1096IN8#PBF from Analog Devices (formerly Linear Technology) is a micropower 8-bit successive approximation analog-to-digital converter with single differential analog input, sample-and-hold, and 3-wire serial interface. It operates from 3V to 9V supply, draws only 80μA during conversion, powers down to 1nA typical in shutdown, and achieves ±0.5LSB total unadjusted error over –40°C to +85°C. It is used in battery monitoring and isolated data acquisition where low quiescent current and direct sensor interfacing are critical.

For engineers reviewing the LTC1096IN8#PBF datasheet, LTC1096IN8#PBF pinout, LTC1096IN8#PBF application, or LTC1096IN8#PBF equivalent, key selection criteria include its 8-pin DIP package, differential input architecture, 33kHz max sampling rate at 5V, 16μs conversion time, and compatibility with ratiometric or external reference configurations.

Technical Context

The LTC1096IN8#PBF implements a switched-capacitor SAR ADC core with integrated sample-and-hold and on-chip bias circuitry optimized for micropower operation. Its differential input stage supports common-mode voltage tracking and allows full-scale spans as low as 250mV, enabling 1mV resolution without external gain stages.

It uses a synchronous 3-wire serial interface (CS/SHDN, CLK, DOUT) with data valid on CLK falling edges. Wake-up timing requires ≥10μs from CS↓ to first CLK↓ after initial CLK↑, and it supports clock frequencies up to 500kHz at 5V or 250kHz at 3V - directly governing maximum sampling rate and power consumption trade-offs.

Key Specifications

Pinout & Package

Package: 8-Lead Plastic DIP (N8), –40°C to +85°C operating temperature range, θ_JA = 130°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 MAX11100EUA+, the LTC1096IN8#PBF uniquely combines differential input, 3V–9V operation, and 1nA shutdown - making it optimal for battery-powered industrial sensors requiring rail-flexible, noise-immune analog front-ends.

Availability

LTC1096IN8#PBF is available at Aetrix Electronics and suitable for battery monitoring, isolated data acquisition, remote temperature measurement, industrial sensor interface, and portable medical device applications requiring stable component supply across extended temperature ranges.

Supply support for LTC1096IN8#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.

The LTC1096 series belongs to Linear's legacy micropower precision ADC product line, designed specifically for energy-constrained industrial and portable systems requiring high accuracy without external support circuitry.

FAQ

What is the maximum sampling frequency of the LTC1096IN8#PBF?

The LTC1096IN8#PBF supports a maximum sampling frequency of 33kHz when operated at 5V with a 500kHz clock. At 3V supply, the maximum clock frequency drops to 250kHz, limiting the sampling rate to 16.5kHz. This relationship is defined by the tCYC parameter (29μs at 5V, 58μs at 3V), and actual system-level sampling rate depends on host processor timing margins and CS/CLK sequencing.

Does the LTC1096IN8#PBF require an external reference voltage?

Yes, the LTC1096IN8#PBF requires an external reference voltage applied to the VREF pin. It accepts references from 2.5V to 5V and supports ratiometric operation - for example, tying VREF to the same source that excites a resistive sensor bridge. The device does not include an internal reference, enabling design flexibility for precision or low-voltage applications.

What is the function of the CS/SHDN pin on the LTC1096IN8#PBF?

The CS/SHDN pin (Pin 1) serves as both chip select and shutdown control for the LTC1096IN8#PBF. When driven low, it enables conversion and serial communication; when high, it disconnects internal power, reducing supply current to 1nA typical. This dual function allows precise power gating in battery-operated systems without requiring additional enable circuitry.

Can the LTC1096IN8#PBF interface directly with a microcontroller's SPI port?

Yes, the LTC1096IN8#PBF interfaces directly with most microcontroller SPI peripherals configured for 3-wire mode (CS, CLK, MISO). It uses a synchronous half-duplex protocol where DOUT outputs 8-bit data MSB-first on CLK falling edges. No MOSI connection is needed, and standard SPI hardware can generate the required timing - though software must manage CS assertion and wake-up delay (≥10μs).

What is the analog input structure of the LTC1096IN8#PBF?

The LTC1096IN8#PBF features a true differential analog input (IN+ and IN– pins) with high input impedance (>10GΩ) and ±1.0μA leakage current over temperature. This architecture enables direct connection to floating sources like Wheatstone bridges or thermocouples, supports common-mode voltage tracking, and allows full-scale spans as low as 250mV - delivering 1mV effective resolution without external gain stages.