Analog Devices Inc. LTC1096AIS8#PBF

Overview

LTC1096AIS8#PBF from Analog Devices (acquired 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 mode, achieves ±0.5 LSB total unadjusted error over temperature, and operates from –40°C to +85°C in an 8-lead SOIC package. It is used in battery-powered sensor monitoring where low quiescent current and ratiometric operation are critical.

For engineers reviewing the LTC1096AIS8#PBF datasheet, LTC1096AIS8#PBF pinout, LTC1096AIS8#PBF application, or LTC1096AIS8#PBF equivalent, key selection criteria include its 16 μs conversion time, 33 kHz max sampling rate, 80 μA active supply current, differential input architecture, and compatibility with external reference or V_CC-based scaling for direct transducer interfacing.

Technical Context

The LTC1096AIS8#PBF implements a switched-capacitor SAR architecture with on-chip sample-and-hold, enabling precise acquisition of differential analog signals without external hold circuitry. Its serial interface uses a synchronous 3-wire protocol (CS/, CLK, DOUT), with data shifted out MSB-first on CLK falling edges.

Power management is controlled via the CS/SHDN pin: logic high forces full shutdown (1 nA typical ICC), while logic low enables conversion with wake-up latency ≤10 μs. Input range is –0.05 V to V_CC + 0.05 V, supporting ratiometric use with V_REF = V_CC or independent external references down to 250 mV full-scale span.

Key Specifications

Pinout & Package

Package: 8-lead plastic SOIC (S8), –40°C to +85°C operating temperature range, JEDEC MS-012AC compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit micropower ADC applications.

Compared with ADS7822U and MAX1110EUA+, the LTC1096AIS8#PBF uniquely balances ±0.5 LSB accuracy, 80 μA active current, differential input, and 3–9 V flexibility-making it optimal for industrial sensor nodes requiring precision and wide supply tolerance without external support components.

Availability

LTC1096AIS8#PBF is available at Aetrix Electronics and suitable for battery-operated systems, remote data acquisition, and isolated sensor interfaces requiring stable component supply across extended temperature ranges.

Supply support for LTC1096AIS8#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, 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 energy-constrained industrial and portable instrumentation where accuracy, low supply current, and robust analog front-end integration are essential.

FAQ

What is the maximum sampling rate supported by the LTC1096AIS8#PBF?

The LTC1096AIS8#PBF supports a maximum sampling frequency of 33 kHz under recommended operating conditions (V_CC = 5 V, f_CLK = 500 kHz). This corresponds to a 16 μs conversion time per sample. At lower clock frequencies or reduced supply voltages (e.g., 3 V), the maximum sampling rate decreases to 16.5 kHz due to timing constraints in the SAR algorithm and internal charge redistribution.

Does the LTC1096AIS8#PBF require an external reference voltage?

No, the LTC1096AIS8#PBF does not require an external reference voltage. It supports ratiometric operation using V_CC as the reference input (connected to Pin 5), enabling direct interfacing with resistive sensors. An external reference (2.5 V to 5 V) may be used for improved accuracy or when V_CC is noisy or unstable. The LTC1096AIS8#PBF maintains ±0.5 LSB total unadjusted error whether using V_CC or an external reference.

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

The LTC1096AIS8#PBF enters shutdown mode when the CS/SHDN pin (Pin 1) is driven high. In this state, internal bias currents are disabled, reducing supply current to 1 nA typical. Wake-up occurs on the falling edge of CS/SHDN, requiring ≥10 μs delay before the first CLK falling edge to ensure internal circuits stabilize. No configuration registers or commands are needed-the LTC1096AIS8#PBF is hardware-controlled for deterministic low-power behavior.

Can the LTC1096AIS8#PBF interface directly with a microcontroller's GPIO pins?

Yes, the LTC1096AIS8#PBF is designed for direct GPIO interfacing using its 3-wire serial protocol (CS/, CLK, DOUT). Logic thresholds meet standard CMOS levels: VIH ≥ 2.0 V at 5 V V_CC, VIL ≤ 0.8 V. DOUT is tri-state when CS/SHDN is high, preventing bus contention. No level-shifting or buffering is required for 3.3 V or 5 V microcontrollers, and the LTC1096AIS8#PBF tolerates 10 μA sink/source on digital pins per datasheet specifications.

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

The LTC1096AIS8#PBF 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 inputs slightly below ground or above V_CC, accommodating small transient excursions. For guaranteed correct codes across temperature, the input must remain within this window; exceeding it risks diode conduction and code errors. The LTC1096AIS8#PBF achieves this with on-chip clamping diodes and high-impedance inputs (±1.0 μA leakage).