Texas Instruments ADC082S101CIMM

Overview

ADC082S101 from Texas Instruments is a dual-channel, 8-bit successive-approximation ADC with serial SPI-compatible interface, 500 ksps to 1 Msps sample rate range, ±0.13 LSB typical INL, and 49.6 dB typical SNR. It operates from a single 2.7V–5.25V supply and supports track-and-hold acquisition on two independent analog inputs (IN1/IN2) for portable data acquisition systems.

For engineers reviewing the ADC082S101 datasheet, ADC082S101 pinout, ADC082S101 application, or ADC082S101 equivalent, key selection criteria include its guaranteed performance across full sample-rate range, low-power shutdown mode (0.12 µW at 3V), straight-binary output format, and compatibility with microprocessor/DSP serial interfaces using CS/SCLK/DIN/DOUT control.

Technical Context

The ADC082S101 implements a charge-redistribution DAC-based successive-approximation architecture with internal track-and-hold. It accepts two analog inputs via a multiplexer and performs conversion in 13 SCLK cycles after a 3-cycle acquisition window, delivering 8-bit straight-binary results MSB-first on DOUT.

Its serial interface complies with SPI, QSPI, and MICROWIRE standards, with chip-select–driven frame timing: each frame begins on CS falling edge and requires integer multiples of 16 SCLK cycles. Control register loading occurs on DIN during first 8 rising SCLK edges of each frame to select next channel (IN1 or IN2).

Key Specifications

Pinout & Package

ADC082S101 is housed in an 8-lead VSSOP package (DGK) with 0.65 mm lead pitch, optimized for compact PCB layouts and thermal performance (θ_JA = 250°C/W). The package is RoHS-compliant and rated for −40°C to +85°C industrial operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel SAR ADC applications.

Compared with ADC082S051, ADC082S101 delivers guaranteed 1 Msps operation and tighter INL/DNL; versus ADC102S101, it trades 2 bits of resolution for lower power and cost in applications where 8-bit fidelity suffices.

Availability

ADC082S101 is available at Aetrix Electronics and suitable for portable systems, remote data acquisition, and instrumentation and control systems requiring stable component supply, long-term manufacturability, and industrial temperature support.

Supply support for ADC082S101 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in precision data converters.

The ADC082S101 belongs to TI's low-power, serial-interface SAR ADC family designed for space-constrained, battery-operated, and industrial sensing applications where simplicity, reliability, and guaranteed performance across speed grades are critical.

FAQ

What is the maximum clock frequency supported by ADC082S101?

The ADC082S101 supports a serial clock (SCLK) frequency range of 50 kHz to 16 MHz. At 16 MHz, it achieves its maximum 1 Msps sample rate with guaranteed AC performance including 49.6 dB SNR and ±0.13 LSB INL. Operation outside this range may yield functional but uncharacterized behavior per the datasheet's Operating Ratings.

How does ADC082S101 handle channel selection between IN1 and IN2?

The ADC082S101 uses an 8-bit control register loaded via DIN to select the next input channel. Bits ADD1 and ADD0 determine selection: "00" chooses IN1 (default on power-up), "01" selects IN2, and "1x" is invalid. This register is updated during each serial frame to enable alternating or repeated sampling without MCU reconfiguration overhead.

Does ADC082S101 require external reference voltage?

No, ADC082S101 does not require an external reference. It uses its analog supply voltage (VA) as the reference, resulting in ratiometric operation where output codes scale linearly with VA. This simplifies design but requires a stable, low-noise VA supply-typically achieved with local 1 µF + 0.1 µF bypassing as specified in the datasheet.

What is the power-down current of ADC082S101 at 3V supply?

When CS is held high, ADC082S101 enters shutdown mode with a typical supply current of 200 nA, corresponding to 0.12 µW power consumption at 3V. This ultra-low state is maintained until CS falls again, enabling rapid wake-up with no power-up delay or dummy conversions required.

Is ADC082S101 pin-compatible with other members of the ADC082Sxx1 family?

Yes, ADC082S101 is fully pin- and function-compatible with ADC082S021 and ADC082S051 per Table 1 in the datasheet. All share identical 8-lead VSSOP packaging, pin assignments, serial interface protocol, and control register structure-allowing drop-in replacement when adjusting sample rate or power targets without PCB changes.