Texas Instruments ADC124S101CIMMX/NOPB

Overview

ADC124S101CIMMX/NOPB from Texas Instruments is a 12-bit, 4-channel successive-approximation ADC with serial SPI-compatible interface, 500 ksps to 1 Msps sample rate range, ±0.64 LSB typical INL, and single 2.7V–5.25V supply operation-used for multi-sensor data acquisition in portable instrumentation.

For engineers reviewing the ADC124S101CIMMX/NOPB datasheet, ADC124S101CIMMX/NOPB pinout, ADC124S101CIMMX/NOPB application, or ADC124S101CIMMX/NOPB equivalent, key selection criteria include guaranteed no missing codes over industrial temperature (−40°C to +85°C), channel-to-channel crosstalk of −86 dB at 5V, and power-down consumption of 0.14 µW at 3V-critical for battery-powered remote sensing nodes.

Technical Context

The ADC124S101CIMMX/NOPB implements a charge-redistribution DAC architecture with integrated track-and-hold, supporting four analog inputs (IN1–IN4) via internal multiplexer. Conversion timing is fully synchronous to SCLK, requiring 13 SCLK cycles per conversion and 16 SCLK cycles total throughput time.

It uses straight binary output coding, supports SPI/QSPI/MICROWIRE protocols, and features programmable input channel selection via 3-bit address (ADD2–ADD0) loaded on DIN during each frame. Power management is controlled solely by CS: high = shutdown (0.14 µW), low = active (4.3 mW at 3V).

Key Specifications

Pinout & Package

ADC124S101CIMMX/NOPB is housed in a 10-lead VSSOP (DGS) package with 0.5 mm lead 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, 12-bit SAR ADC applications.

Compared with ADC124S051CIMMX/NOPB and ADS7953IRHBT, ADC124S101CIMMX/NOPB uniquely balances 1 Msps throughput, ultra-low shutdown current, and minimal external component count in a proven 4-channel configuration-ideal for space-constrained, battery-sensitive designs requiring full-speed capability.

Availability

ADC124S101CIMMX/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, remote telemetry, and industrial sensor nodes requiring stable component supply, long-term lifecycle support, and guaranteed industrial-temperature operation.

Supply support for ADC124S101CIMMX/NOPB 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 emphasis on reliability, precision, and energy efficiency.

The ADC124S101CIMMX/NOPB belongs to TI's precision SAR ADC product line, engineered for low-power, multi-channel data acquisition in portable and distributed sensing applications where size, power, and accuracy are co-optimized.

FAQ

What is the absolute maximum supply voltage for ADC124S101CIMMX/NOPB?

The absolute maximum supply voltage (VA) for ADC124S101CIMMX/NOPB is 6.5 V, but the recommended operating range is +2.7 V to +5.25 V. Exceeding 6.5 V risks permanent damage to the internal MOS structures. Operation outside the specified range may cause parametric degradation or latch-up, especially if input pins exceed VA + 0.3 V or fall below GND − 0.3 V. Always observe the 1 µF + 0.1 µF local bypassing requirement for stable operation within the rated range.

Does ADC124S101CIMMX/NOPB require an external reference voltage?

No, ADC124S101CIMMX/NOPB does not require an external reference voltage-it uses its VA supply pin as the reference, making it ratiometric. The full-scale input range is 0 V to VA, and LSB size equals VA/4096. This eliminates the need for a separate precision reference IC, reducing BOM cost and layout complexity. However, supply noise directly impacts SNR, so clean, well-bypassed VA is essential-TI recommends dual-capacitor decoupling (1 µF tantalum + 0.1 µF ceramic) within 1 cm of the pin.

How is channel selection implemented on ADC124S101CIMMX/NOPB?

Channel selection on ADC124S101CIMMX/NOPB is performed via three address bits (ADD2, ADD1, ADD0) loaded into the control register through the DIN pin during each serial frame. These bits are clocked in on the first 8 rising edges of SCLK after CS falls. Valid combinations are: 000 → IN1 (default), 001 → IN2, 010 → IN3, 011 → IN4. Bits 7–6 and 2–0 are don't-care. The selected channel is sampled in the *next* conversion cycle-not the current one-enabling pipelined multi-channel sequencing.

What is the minimum and maximum SCLK frequency supported by ADC124S101CIMMX/NOPB?

ADC124S101CIMMX/NOPB supports SCLK frequencies from 50 kHz to 16 MHz. Its electrical specifications-including INL, SNR, and crosstalk-are guaranteed for f_SCLK = 8 MHz to 16 MHz when operating at 500 ksps to 1 Msps. Below 8 MHz, timing margins relax but performance remains functional; above 16 MHz, setup/hold violations may occur. Duty cycle must be maintained between 30% and 70%. For reliable 1 Msps throughput, use ≥12 MHz SCLK to accommodate 16-cycle frame timing.

Is ADC124S101CIMMX/NOPB pin-compatible with other members of the ADC124Sxx1 family?

Yes, ADC124S101CIMMX/NOPB is fully pin- and function-compatible with ADC124S021CIMMX/NOPB and ADC124S051CIMMX/NOPB per TI's datasheet Table 1. All share identical 10-pin VSSOP (DGS) packaging, pin assignments, serial interface protocol, control register format, and power architecture. This allows direct substitution to scale sample rate (200 ksps → 500 ksps → 1 Msps) without PCB redesign-only firmware timing adjustments are needed to match the new device's maximum throughput.