Texas Instruments ADC102S021CIMMX/NOPB

Overview

ADC102S021CIMMX/NOPB from Texas Instruments is a 10-bit, dual-channel successive-approximation ADC with serial SPI-compatible interface, 50–200 ksps sample rate, ±0.13 LSB typical INL/DNL, and 61.8 dB SNR at 39.9 kHz - used for precision analog monitoring in portable instrumentation and remote data acquisition systems.

For engineers reviewing the ADC102S021CIMMX/NOPB datasheet, ADC102S021CIMMX/NOPB pinout, ADC102S021CIMMX/NOPB application, or ADC102S021CIMMX/NOPB equivalent, key selection considerations include its single-supply operation (2.7V–5.25V), 8-pin VSSOP package, channel-to-channel crosstalk of −87 dB, power-down current of 0.12 µW (3V), and guaranteed no missing codes over industrial temperature range (−40°C to +85°C).

Technical Context

The ADC102S021CIMMX/NOPB implements a charge-redistribution DAC architecture with internal track-and-hold, supporting simultaneous sampling control via CS-driven serial frames. It uses straight binary output coding and accepts input voltages from 0V to VA with 33 pF input capacitance in track mode.

Its serial interface operates at SCLK frequencies from 0.8 MHz to 3.2 MHz, requires integer multiples of 16 SCLK cycles per frame, and supports dynamic input channel selection (IN1 or IN2) via 3-bit control register loaded on DIN during each conversion cycle.

Key Specifications

Pinout & Package

The ADC102S021CIMMX/NOPB is housed in an 8-lead VSSOP (DGK0008A) package with exposed pad, optimized for compact PCB layout and thermal performance (θ_JA = 250°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADC102S051CIMMX/NOPB and ADC122S021CIMMX/NOPB, the ADC102S021CIMMX/NOPB delivers optimal balance of low power (1.94 mW), proven 10-bit linearity (±0.13 LSB), and industrial temperature reliability - making it the preferred choice for cost-sensitive, battery-constrained, or thermally demanding dual-channel monitoring designs.

Availability

ADC102S021CIMMX/NOPB is available at Aetrix Electronics and suitable for portable systems, remote data acquisition, and instrumentation and control systems requiring stable component supply across long production lifecycles.

Supply support for ADC102S021CIMMX/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 specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in precision data converters and industrial-grade IC design.

The ADC102S021CIMMX/NOPB belongs to TI's precision SAR ADC product line, engineered specifically for low-power, dual-channel analog monitoring in space- and energy-constrained embedded systems.

FAQ

What is the maximum clock frequency supported by ADC102S021CIMMX/NOPB for reliable operation?

The ADC102S021CIMMX/NOPB supports SCLK frequencies from 0.8 MHz to 3.2 MHz across its full operating range. At 3.2 MHz, it achieves 200 ksps throughput with 16 SCLK cycles per conversion frame. Operation outside this range may violate timing specifications such as tACC (data access time) or tSU (data setup time), potentially causing read errors or inconsistent channel selection. Always verify timing margins under worst-case voltage and temperature conditions.

Does ADC102S021CIMMX/NOPB require external reference voltage or calibration?

No, the ADC102S021CIMMX/NOPB uses its VA supply pin as the analog reference - it is ratiometric and requires no external reference. Offset and gain errors are factory-trimmed; typical values are +0.1 LSB offset and −0.11 LSB full-scale error. System-level calibration is optional and only needed for applications demanding <±0.05 LSB total error, as the device guarantees ±0.4 LSB max INL/DNL over temperature without calibration.

How does the ADC102S021CIMMX/NOPB handle channel selection between IN1 and IN2?

The ADC102S021CIMMX/NOPB selects input channels via a 3-bit control register loaded on DIN during each conversion frame. Bits ADD1 and ADD0 determine selection: '00' = IN1 (default), '01' = IN2. ADD2 is don't-care. The register is updated on the first 8 rising SCLK edges after CS falls, and the selected channel is sampled in the *next* conversion cycle - enabling predictable, software-controlled multiplexing without pipeline delay.

Can ADC102S021CIMMX/NOPB operate from a 2.7V supply while maintaining full 10-bit performance?

Yes, the ADC102S021CIMMX/NOPB is fully specified from 2.7V to 5.25V. At 2.7V, it maintains 10-bit resolution with no missing codes, ±0.4 LSB max INL/DNL, 61.3 dB min SNR, and 75 dB min SFDR - all within datasheet limits. Power consumption drops to ~1.3 mW, and full-power bandwidth remains 8 MHz. Performance curves in Figures 11–12 and 19–20 confirm stable behavior across the entire supply range.

Is ADC102S021CIMMX/NOPB pin-compatible with other devices in the ADC102Sxx family?

Yes, the ADC102S021CIMMX/NOPB is fully pin- and function-compatible with ADC102S051CIMMX/NOPB and ADC102S101CIMMX/NOPB per Table 1 of the datasheet. All share identical 8-pin VSSOP (DGK) packaging, pin assignments, serial interface protocol, and control register structure - enabling drop-in replacement when scaling sample rate or resolution within the same PCB layout.