Texas Instruments ADC104S051CIMMX

Overview

ADC104S051 from Texas Instruments is a 10-bit, 4-channel successive-approximation ADC with serial SPI-compatible interface, operating at 200–500 ksps sample rates, 2.7V–5.25V single supply, and −40°C to +85°C industrial temperature range. It integrates internal track-and-hold and charge-redistribution DAC for precision acquisition in portable instrumentation and remote data acquisition systems.

For engineers reviewing the ADC104S051 datasheet, ADC104S051 pinout, ADC104S051 application, or ADC104S051 equivalent, this page delivers verified specifications, validated pin functions, confirmed industrial use cases, and two rigorously cross-checked alternative parts - all aligned to TI's SNAS253G revision March 2013 documentation.

Technical Context

The ADC104S051 employs a charge-redistribution DAC architecture with internal track-and-hold, enabling full 10-bit resolution without missing codes across its 200–500 ksps range. Its conversion sequence requires exactly 13 SCLK cycles after acquisition, with throughput time fixed at 16 SCLK periods per frame.

It uses straight binary output coding, supports SPI/QSPI/MICROWIRE protocols, and features channel-selectable input multiplexing via an 8-bit control register (ADD2:ADD0 bits). Power-down mode reduces current to 30 nA at 3.6V, activated by high CS.

Key Specifications

Pinout & Package

ADC104S051 is housed in a 10-lead VSSOP package (3.0 mm × 3.0 mm, 0.5 mm pitch), optimized for space-constrained PCB layouts while maintaining thermal resistance of 190°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit SAR ADC applications.

Compared with ADC104S021 and ADC104S101, the ADC104S051 uniquely balances mid-range speed (200–500 ksps), ultra-low power, and industrial temperature support - making it optimal for portable instrumentation where 500 ksps headroom and sub-3 mW consumption are simultaneously required.

Availability

ADC104S051 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 assurance, and traceable sourcing.

Supply support for ADC104S051 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 delivering analog, embedded processing, and connectivity solutions with deep expertise in precision data converters and industrial-grade reliability.

The ADC104S051 belongs to TI's precision SAR ADC product line, designed specifically for low-power, multi-channel data acquisition in portable and distributed industrial systems where size, energy efficiency, and robustness are critical.

FAQ

What is the maximum sample rate supported by the ADC104S051?

The ADC104S051 is fully specified for operation up to 500 ksps, with guaranteed performance across the entire 200–500 ksps range. At 500 ksps, it maintains 62.7 dB SNR and ±0.13 LSB DNL. Exceeding 500 ksps is not recommended, as AC specifications degrade beyond this point per TI's SNAS253G datasheet.

Does the ADC104S051 require an external voltage reference?

No, the ADC104S051 uses its VA supply pin as the internal reference - eliminating the need for an external reference IC. The full-scale range is 0V to VA, with LSB = VA/1024. This simplifies design but requires clean, well-bypassed VA (1 µF + 0.1 µF) to maintain SNR and INL performance.

How is channel selection implemented on the ADC104S051?

Channel selection is controlled via the 3-bit ADD2:ADD0 field in the 8-bit control register loaded through the DIN pin. Valid combinations are: 000 → IN1 (default), 001 → IN2, 010 → IN3, 011 → IN4. These bits are latched on the first 8 rising SCLK edges after CS falls, determining the input for the *next* conversion cycle.

What is the power-down current of the ADC104S051 at 3.6V?

At 3.6V supply and TA = 25°C, the ADC104S051 draws 30 nA in shutdown mode (CS high), as specified in the Electrical Characteristics table. This ultra-low quiescent current enables years of operation in battery-backed sensor nodes and energy-harvesting applications.

Is the ADC104S051 compatible with standard SPI interfaces?

Yes, the ADC104S051 supports SPI, QSPI, and MICROWIRE protocols. It uses CS as frame sync, SCLK for timing, DOUT for MSB-first data output on falling edges, and DIN for control register input on rising edges - matching standard SPI Mode 0 (CPOL = 0, CPHA = 0) timing conventions.