Texas Instruments ADC124S101CIMM

Overview

ADC124S101 from Texas Instruments is a 12-bit, 4-channel successive-approximation ADC with serial SPI-compatible interface, operating at 500 ksps to 1 Msps sample rates, 72.4 dB typical SNR, ±0.64 LSB typical INL, and single-supply operation from 2.7V to 5.25V. It serves as a compact analog front-end for multi-sensor data acquisition in portable instrumentation.

For engineers reviewing the ADC124S101 datasheet, ADC124S101 pinout, ADC124S101 application, or ADC124S101 equivalent, key selection considerations include its guaranteed no-missing-codes performance over industrial temperature (−40°C to +85°C), low-power shutdown mode (0.14 µW at 3V), and configurable channel sequencing via DIN-controlled control register.

Technical Context

The ADC124S101 implements a charge-redistribution SAR architecture with integrated track-and-hold, supporting up to four independent analog inputs (IN1–IN4) routed through an internal multiplexer. Its conversion timing is fully synchronous to SCLK, requiring exactly 13 SCLK cycles for conversion after 3-cycle acquisition, yielding a fixed 16-cycle throughput time per frame.

Serial communication uses MSB-first straight-binary output on DOUT and 8-bit control register loading on DIN, compatible with SPI, QSPI, and MICROWIRE protocols. The device features supply-referenced conversion (VA = VREF), eliminating external reference components while maintaining 12-bit monotonicity and guaranteed no missing codes across full operating range.

Key Specifications

Pinout & Package

ADC124S101 is housed in a 10-lead VSSOP (DGS) package with 0.5 mm lead pitch and exposed thermal pad. Pin layout follows TI's standard 10-pin VSSOP footprint, compatible with automated assembly and IPC-7351B land patterns.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-channel, 12-bit SAR ADC applications.

Compared with ADC124S051 and ADS7953, the ADC124S101 uniquely balances 1 Msps throughput, ultra-low shutdown power, and supply-referenced simplicity in a 10-pin VSSOP - making it optimal for space- and energy-constrained 4-channel designs where external references are undesirable.

Availability

ADC124S101 is available at Aetrix Electronics and suitable for portable instrumentation, remote data acquisition, and industrial sensor nodes requiring stable component supply, long-term lifecycle assurance, and guaranteed no-missing-codes performance across temperature.

Supply support for ADC124S101 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 IC design.

The ADC124S101 belongs to TI's serial-interface SAR ADC family designed for low-power, multi-channel data acquisition in space-constrained embedded systems - emphasizing supply simplicity, guaranteed linearity, and seamless microcontroller integration.

FAQ

What is the maximum sample rate supported by the ADC124S101?

The ADC124S101 supports a maximum sample rate of 1 Msps, with full electrical specifications guaranteed across the entire 500 ksps to 1 Msps range. At 1 Msps, it achieves 72.4 dB typical SNR and ±0.64 LSB typical INL under standard test conditions (VA = 5.25 V, f_IN = 40.3 kHz). This makes ADC124S101 suitable for high-speed sensor sampling without performance trade-offs.

Does the ADC124S101 require an external voltage reference?

No, the ADC124S101 does not require an external voltage reference. It uses its analog supply voltage (VA) as the reference, supporting a 2.7 V to 5.25 V range. This ratiometric architecture simplifies design by eliminating external reference components and associated decoupling, while maintaining 12-bit monotonicity and guaranteed no missing codes - a key feature of the ADC124S101.

How is channel selection implemented on the ADC124S101?

Channel selection on the ADC124S101 is controlled via a 3-bit address field (ADD2–ADD0) in an 8-bit control register loaded on DIN during each conversion frame. The mapping is: 000 → IN1 (default), 001 → IN2, 010 → IN3, 011 → IN4. This allows dynamic, software-directed sequencing of the four analog inputs without hardware reconfiguration - a core capability of the ADC124S101.

What is the power consumption of the ADC124S101 in shutdown mode?

In shutdown mode (CS high), the ADC124S101 consumes only 0.14 µW at 3 V supply or 0.32 µW at 5 V supply, corresponding to 38 nA or 60 nA supply current respectively. This ultra-low quiescent power enables aggressive duty-cycling in battery-operated systems, and the ADC124S101 resumes full operation immediately upon CS assertion with no wake-up delay or dummy conversions required.

Is the ADC124S101 pin-compatible with other members of the ADC124Sxx1 family?

Yes, the ADC124S101 is fully pin- and function-compatible with ADC124S021 and ADC124S051, as confirmed in Table 1 of the official datasheet (SNAS283D). All share identical 10-pin VSSOP packaging, pin assignments, control register format, and serial interface timing - allowing drop-in replacement based on required sample rate (200 ksps, 500 ksps, or 1 Msps) without PCB or firmware changes.