Analog Devices Inc. LTC1096CS8#PBF

Overview

LTC1096CS8#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 idle current, achieves ±0.5 LSB total unadjusted error over temperature, and operates in 0°C to 70°C industrial range. It is used in battery-powered sensor monitoring where low quiescent power and direct sensor interfacing are critical.

For engineers reviewing the LTC1096CS8#PBF datasheet, LTC1096CS8#PBF pinout, LTC1096CS8#PBF application, or LTC1096CS8#PBF equivalent, key selection criteria include its 80 μA active supply current, 16 μs conversion time, 33 kHz max sampling rate, differential input architecture, and SOIC-8 package compatibility with space-constrained embedded systems.

Technical Context

The LTC1096CS8#PBF implements a switched-capacitor SAR ADC architecture with on-chip sample-and-hold, enabling accurate DC and low-frequency signal digitization without external hold circuitry. Its differential input supports ratiometric operation and accepts analog spans as low as 250 mV full-scale when referenced to an external VREF pin.

It uses a synchronous 3-wire serial interface (CS/SHDN, CLK, DOUT) with data valid on CLK falling edges and requires no DIN line-unlike the multiplexed LTC1098 variant. Wake-up timing is strictly controlled: CS↓ must precede first CLK↓ by ≥10 μs at 5 V operation to ensure stable internal biasing before conversion initiation.

Key Specifications

Pinout & Package

Package: 8-lead plastic SOIC (S8), 150°C max junction temperature, θJA = 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 LTC1096CS8#PBF uniquely combines differential input, external VREF support, and sub-100 μA active current-making it optimal for ultra-low-power, precision ratiometric sensing where signal conditioning headroom is limited.

Availability

LTC1096CS8#PBF is available at Aetrix Electronics and suitable for battery-operated systems, remote data acquisition nodes, and isolated industrial monitoring requiring stable component supply across extended production lifecycles.

Supply support for LTC1096CS8#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, acquired Linear Technology in 2017 to expand precision signal chain solutions.

The LTC1096CS8#PBF belongs to ADI's legacy Linear Technology micropower ADC family, designed specifically for energy-constrained applications including portable instrumentation, battery fuel gauging, and distributed sensor networks.

FAQ

What is the maximum clock frequency supported by the LTC1096CS8#PBF?

The LTC1096CS8#PBF supports a maximum clock frequency of 500 kHz at 5 V operation, yielding a 16 μs conversion time and 33 kHz maximum sampling rate. At 3 V, the max clock drops to 250 kHz due to internal charge pump limitations-verified in the Recommended Operating Conditions table on page 4 of the datasheet.

Does the LTC1096CS8#PBF require an external reference voltage?

Yes, the LTC1096CS8#PBF requires an external reference voltage applied to the VREF pin to define its full-scale range. It does not include an internal reference. The device supports ratiometric operation-where VREF is derived from the same source as the sensor excitation-enabling high-accuracy measurements immune to supply variation.

Can the LTC1096CS8#PBF operate from a 3.3 V supply?

Yes, the LTC1096CS8#PBF operates from 3.0 V to 9.0 V, making 3.3 V fully compliant. At 3.3 V, the maximum clock frequency is 250 kHz (per page 4), resulting in a 58 μs conversion time and 16.5 kHz max sampling rate. Total unadjusted error remains ±1.0 LSB over temperature per page 5 specifications.

What is the purpose of the CS/SHDN pin on the LTC1096CS8#PBF?

The CS/SHDN pin on the LTC1096CS8#PBF serves as both chip select and shutdown control. When pulled low, it enables conversion and serial communication; when high, it disconnects internal power domains, reducing supply current to 1 nA typical. This dual function enables precise power gating in duty-cycled sensor systems without external regulators.

How does the differential input of the LTC1096CS8#PBF improve measurement accuracy?

The differential input of the LTC1096CS8#PBF rejects common-mode noise induced on sensor cables and allows measurement of signals referenced to non-ground potentials-such as bridge outputs or thermocouple voltages. Combined with ±0.5 LSB total unadjusted error and high input impedance (>1 GΩ), it enables accurate digitization without external instrumentation amplifiers in noisy industrial environments.