Texas Instruments ADC082S051CIMM

Overview

ADC082S051 from Texas Instruments is a low-power, 2-channel, 8-bit successive-approximation ADC with serial SPI-compatible interface, operating at 200–500 ksps sample rates, 2.7V–5.25V single supply, and specified over industrial temperature (−40°C to +85°C); used for dual-sensor monitoring in portable instrumentation.

For engineers reviewing the ADC082S051 datasheet, ADC082S051 pinout, ADC082S051 application, or ADC082S051 equivalent, key selection considerations include its dual-input multiplexed architecture, 49.5 dB typical SNR, ±0.09 LSB typical DNL, power-down mode consuming only 0.12 µW at 3V, and VSSOP-8 package compatibility with space-constrained embedded systems.

Technical Context

The ADC082S051 employs a charge-redistribution DAC-based successive-approximation architecture with internal track-and-hold, supporting configurable single- or dual-channel acquisition via IN1/IN2 inputs. Its control logic synchronizes conversion, data readout, and channel selection using an 8-bit control register loaded via DIN on rising SCLK edges.

Conversion timing is tightly coupled to the external SCLK: 3 SCLK cycles for track mode, 13 for hold/convert/readout (total 16 SCLK per frame), with MSB-first straight-binary output on DOUT aligned to falling SCLK edges. Chip select (CS) initiates each serial frame and enables automatic power-down when high.

Key Specifications

Pinout & Package

ADC082S051 is housed in an 8-lead VSSOP (Package DGK0008A), 3.0 mm × 3.0 mm, 0.65 mm pitch, thermally enhanced for industrial ambient operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADC082S021 and ADC082S101, the ADC082S051 delivers optimal balance of speed (200–500 ksps), power (2.2 mW @ 3V), and noise performance (49.5 dB SNR), making it the default choice for general-purpose dual-channel 8-bit conversion in industrial and portable designs.

Availability

ADC082S051 is available at Aetrix Electronics and suitable for portable systems, remote data acquisition, and instrumentation and control systems requiring stable component supply, long-term lifecycle support, and guaranteed industrial-grade specifications.

Supply support for ADC082S051 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 high-reliability components for industrial, automotive, and communications markets.

The ADC082S051 belongs to TI's precision SAR ADC product line, designed specifically for cost-sensitive, space-constrained applications requiring dual analog inputs, low power, and SPI-compatible digital interfacing in industrial and portable equipment.

FAQ

What is the maximum sample rate supported by the ADC082S051?

The ADC082S051 is fully specified for continuous operation from 200 ksps up to 500 ksps. Its conversion timing is fixed at 16 SCLK cycles per frame, so achieving 500 ksps requires a minimum SCLK frequency of 8 MHz. Performance parameters including SNR, DNL, and INL remain guaranteed across this entire range without derating.

Does the ADC082S051 require an external voltage reference?

No, the ADC082S051 uses its analog supply voltage (VA) as the reference - it is a ratiometric converter. The full-scale range is always 0 V to VA, and output codes scale proportionally. This eliminates the need for an external reference and simplifies layout, though supply noise directly impacts SNR, so proper bypassing (1 µF + 0.1 µF) is essential.

How does channel selection work on the ADC082S051?

Channel selection is controlled via the 3-bit address field (ADD2–ADD0) in the 8-bit control register loaded on DIN. Only two valid configurations are supported: ADD1=0, ADD0=0 selects IN1; ADD1=0, ADD0=1 selects IN2. ADD1=1 is undefined and results in indeterminate DOUT behavior. The selected channel applies to the *next* conversion after register load.

What happens to the ADC082S051 when CS is held high?

When CS is high, the ADC082S051 enters shutdown mode, reducing supply current to 200 nA (at 3V) or 200 nA (at 5V), and places DOUT in high-impedance state. Internal clocking is gated off, and the track-and-hold circuit holds its last sampled voltage. Conversion resumes immediately on the next CS falling edge with no wake-up delay or dummy cycles required.

Is the ADC082S051 compatible with standard SPI interfaces?

Yes, the ADC082S051 supports SPI Mode 0 (CPOL = 0, CPHA = 0): data is sampled on the rising edge of SCLK and shifted out on the falling edge. It is also compatible with QSPI and MICROWIRE protocols. DIN accepts control register data on rising SCLK edges; DOUT outputs conversion results MSB-first on falling SCLK edges, with CS acting as frame sync.