Texas Instruments ADC104S051CIMM

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 supports channel selection via DIN control register for portable instrumentation and remote data acquisition.

For engineers reviewing the ADC104S051 datasheet, ADC104S051 pinout, ADC104S051 application, or ADC104S051 equivalent, this page delivers verified electrical specs (DNL ±0.13 LSB, SNR 62.7 dB), true pin functions (CS, SCLK, DOUT, DIN, IN1–IN4), real-world use cases (remote sensor nodes, embedded control), and two confirmed pin-compatible alternatives.

Technical Context

The ADC104S051 uses a charge-redistribution DAC architecture with internal track-and-hold, acquiring input voltage over 3 SCLK cycles before performing 13-cycle conversion and MSB-first serial readout. Its control logic accepts 8-bit DIN commands to select one of four analog inputs (IN1–IN4) for the next conversion cycle.

It operates fully over 200–500 ksps without performance degradation, supports SPI/QSPI/MICROWIRE protocols, and enters ultra-low-power shutdown (<0.5 µW) when CS is high. The straight-binary output and supply-referenced full-scale (VA/1024 per LSB) enable direct interfacing with microcontrollers and DSPs without external reference or level-shifting.

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 compact PCB layouts and thermal performance (θ_JA = 190°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-channel, 10-bit SAR ADC applications.

Compared with ADC104S021 and ADC104S101, the ADC104S051 uniquely balances mid-range speed (200–500 ksps), ultra-low power (2.7 mW @ 3V), and industrial temperature support - making it optimal for general-purpose embedded data acquisition where flexibility and efficiency are equally critical.

Availability

ADC104S051 is available at Aetrix Electronics and suitable for portable systems, remote data acquisition, instrumentation and control systems requiring stable component supply and long-term industrial-grade availability.

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 specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in precision data converters and industrial-grade ICs.

The ADC104S051 belongs to TI's precision SAR ADC family designed for cost-sensitive, low-power embedded systems requiring reliable multi-channel analog digitization without external references or complex support circuitry.

FAQ

What is the maximum sample rate supported by the ADC104S051?

The ADC104S051 is fully specified for continuous operation from 200 ksps to 500 ksps. At 500 ksps, it achieves guaranteed performance including DNL ±0.5 LSB, SNR ≥61.3 dB, and THD ≤−72 dB. Exceeding 500 ksps is not characterized and may degrade linearity or dynamic performance. The ADC104S051 maintains consistent timing behavior across this entire range without recalibration or configuration changes.

Does the ADC104S051 require an external voltage reference?

No, the ADC104S051 uses its VA supply pin as the analog reference - full-scale range is 0V to VA, with LSB = VA/1024. This eliminates the need for external references, simplifying layout and reducing BOM count. However, VA must be clean and well-bypassed (1 µF + 0.1 µF capacitors within 1 cm) to maintain SNR and THD performance, as supply noise directly impacts conversion accuracy.

How is channel selection implemented on the ADC104S051?

Channel selection is performed via the 8-bit DIN control register, loaded during the first 8 rising edges of SCLK after CS falls. Bits ADD2–ADD0 (bits 5–3) determine the next input: 000 = IN1 (default), 001 = IN2, 010 = IN3, 011 = IN4. The remaining bits (DONTC) are ignored. This allows dynamic, per-conversion channel switching without reconfiguring hardware connections.

What is the power consumption of the ADC104S051 in shutdown mode?

In shutdown mode (CS high), the ADC104S051 draws only 30 nA at +3.6V and 90 nA at +5.25V - corresponding to 0.11 µW and 0.47 µW power dissipation, respectively. During shutdown, DOUT enters high-impedance state and internal clocks are gated off. Full functionality resumes within one SCLK cycle after CS goes low, with no power-up delay or dummy conversions required.

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 serial output (data valid on SCLK falling edge), and DIN for control register input (sampled on SCLK rising edge). No mode pins or configuration registers are needed - compatibility is inherent in its timing and signaling structure, enabling plug-and-play integration with most microcontroller SPI peripherals.