Texas Instruments ADC082S101CIMMX

Overview

ADC082S101 from Texas Instruments is a low-power, 8-bit, dual-channel successive-approximation ADC with SPI-compatible serial interface, 500 ksps to 1 Msps sample rate, ±0.13 LSB typical INL, and operation from 2.7V to 5.25V supply. It performs simultaneous track-and-hold on two analog inputs (IN1/IN2) and delivers straight-binary output for portable instrumentation and remote data acquisition.

For engineers reviewing the ADC082S101 datasheet, ADC082S101 pinout, ADC082S101 application, or ADC082S101 equivalent, key selection criteria include guaranteed performance across full 500 ksps–1 Msps range, channel-to-channel crosstalk <−73 dB at 5.25V, shutdown current of 0.12 µW at 3V, and VSSOP-8 package compatibility with space-constrained embedded systems.

Technical Context

The ADC082S101 implements a charge-redistribution DAC architecture with internal track-and-hold, enabling precise sampling during the first three SCLK cycles after CS assertion. Its control logic manages multiplexer selection (IN1/IN2), conversion sequencing, and 16-cycle serial frame timing - all synchronized to external SCLK.

It uses VA as both supply and reference, delivering 8-bit straight-binary output MSB-first on DOUT, while accepting 8-bit control register data on DIN to configure next-channel selection. Power management is controlled solely via CS: high = shutdown (0.12 µW), low = active (3.9 mW at 3V).

Key Specifications

Pinout & Package

ADC082S101 is housed in an 8-lead VSSOP (DGK) package - 2.3 mm × 2.0 mm footprint, 0.5 mm lead pitch, thermally enhanced for compact PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADC082S051 and ADC102S021, the ADC082S101 uniquely delivers 8-bit accuracy at 1 Msps in the same VSSOP-8 footprint - making it optimal for cost-sensitive, medium-speed dual-channel digitization where timing determinism and ultra-low shutdown power are critical.

Availability

ADC082S101 is available at Aetrix Electronics and suitable for portable systems, remote data acquisition, and instrumentation and control systems requiring stable component supply and long-term industrial lifecycle 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 digital signal technologies with over 50 years of innovation in precision data converters.

The ADC082S101 belongs to TI's precision SAR ADC family designed for low-power, multi-channel data acquisition in space- and energy-constrained industrial and portable applications.

FAQ

What is the maximum sample rate supported by the ADC082S101?

The ADC082S101 supports a maximum sample rate of 1 Msps, with full electrical specifications guaranteed across the entire 500 ksps to 1 Msps range. This eliminates performance uncertainty at higher throughput - unlike many SAR ADCs rated only at a single sample rate. The device achieves this using a 16-cycle serial frame synchronized to SCLK, where conversion and readout complete within each frame.

Does the ADC082S101 require an external reference voltage?

No, the ADC082S101 does not require an external reference. It uses the VA supply pin as both power source and internal reference, with LSB size defined as VA/256. This simplifies system design by removing the need for a separate precision reference IC or resistor divider network, though supply noise directly impacts SNR - hence the requirement for local 1 µF + 0.1 µF bypassing at VA.

How is channel selection implemented on the ADC082S101?

Channel selection between IN1 and IN2 is controlled via the 3-bit address field (ADD2–ADD0) in the 8-bit control register loaded on DIN during each conversion frame. Per Table 4 in the datasheet, ADD1=0 and ADD0=0 selects IN1 (default), while ADD1=0 and ADD0=1 selects IN2. ADD1=1 is invalid and results in indeterminate DOUT behavior. The register is updated before each conversion, enabling dynamic channel switching.

What is the power consumption of the ADC082S101 in shutdown mode?

In shutdown mode (CS high), the ADC082S101 draws just 0.12 µW at +3V supply and 0.35 µW at +5V supply. This ultra-low quiescent power enables aggressive duty-cycling in battery-operated devices - for example, waking every 10 seconds to perform a 1-ms conversion burst, achieving average current well below 1 µA. The device resumes conversion immediately upon CS assertion, with no power-up delay or dummy cycles.

Is the ADC082S101 pin-compatible with other members of the ADC082Sxx family?

Yes, the ADC082S101 is fully pin- and function-compatible with ADC082S021 and ADC082S051 per Table 1 in the datasheet. All share identical VSSOP-8 pinout, register map, timing structure, and interface protocol. This allows drop-in replacement for performance scaling - e.g., upgrading from ADC082S051 (500 ksps max) to ADC082S101 (1 Msps) without PCB or firmware changes - provided the higher-speed SCLK and timing margins are met.