Texas Instruments ADC108S022CIMTX/NOPB

Overview

ADC108S022CIMTX/NOPB from Texas Instruments is a low-power, 8-channel, 10-bit successive-approximation ADC with 50–200 ksps throughput, ±0.3 LSB INL/DNL, and independent analog/digital supplies (VA: 2.7–5.25 V, VD: 2.7–VA). It interfaces via SPI/QSPI/MICROWIRE-compatible serial interface and operates across −40°C to +105°C - used in automotive navigation sensor signal acquisition.

For engineers reviewing the ADC108S022CIMTX/NOPB datasheet, ADC108S022CIMTX/NOPB pinout, ADC108S022CIMTX/NOPB application, or ADC108S022CIMTX/NOPB equivalent, key selection considerations include channel count, serial interface timing compliance (0.8–3.2 MHz SCLK), power-down current (0.09 µW @ 3 V), TSSOP-16 package thermal resistance (96°C/W), and input track/hold acquisition time (3 SCLK cycles).

Technical Context

The ADC108S022CIMTX/NOPB implements a charge-redistribution DAC-based successive-approximation architecture with integrated track-and-hold. Conversion begins on CS falling edge, followed by 3-cycle track phase and 13-cycle hold/convert/readout phase - total throughput time fixed at 16 SCLK periods.

It supports eight single-ended analog inputs (IN0–IN7), accepts VA as both supply and reference, and delivers straight-binary output MSB-first over DOUT. Digital control register (ADD2–ADD0) selects input channel per conversion cycle, while DIN loads register bits on rising SCLK edges.

Key Specifications

Pinout & Package

ADC108S022CIMTX/NOPB is housed in a 16-lead TSSOP (PW package), 4.4 mm × 5.0 mm body, 0.65 mm pitch, with exposed pad not electrically connected. Thermal resistance θ_JA = 96°C/W on 4-layer 2 oz. PCB.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-channel, 10-bit SAR ADC applications.

Compared with ADS7822U and MAX11100ETK+, ADC108S022CIMTX/NOPB uniquely combines independent analog/digital supplies, internal VA-referenced operation, and guaranteed −40°C to +105°C performance in a cost-optimized TSSOP package - making it optimal for automotive and industrial designs requiring robustness and layout simplicity over marginal resolution or speed gains.

Availability

ADC108S022CIMTX/NOPB is available at Aetrix Electronics and suitable for automotive navigation systems, portable medical monitors, industrial process controllers, and mobile communication baseband monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADC108S022CIMTX/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 automotive-grade reliability.

ADC108S022CIMTX/NOPB belongs to TI's precision SAR ADC product line, engineered for high-accuracy, low-power, multi-channel sensing in harsh environments - targeting automotive, industrial, and portable instrumentation applications.

FAQ

What is the maximum clock frequency supported by ADC108S022CIMTX/NOPB?

The ADC108S022CIMTX/NOPB supports a maximum SCLK frequency of 3.2 MHz under specified operating conditions (VA = VD = 2.7–5.25 V, TA = −40°C to +105°C). Its minimum clock frequency is 0.8 MHz. Operation outside this range may cause timing violations or conversion errors. The device requires 16 SCLK cycles per conversion frame, limiting maximum sample rate to 200 ksps at 3.2 MHz.

Does ADC108S022CIMTX/NOPB require an external voltage reference?

No, ADC108S022CIMTX/NOPB does not require an external voltage reference. It uses the analog supply voltage (VA) as its internal reference, with input range defined as 0 V to VA. This simplifies design by eliminating external reference components and associated routing constraints - provided VA is well-bypassed and stable.

How is channel selection implemented in ADC108S022CIMTX/NOPB?

Channel selection in ADC108S022CIMTX/NOPB is controlled via a 3-bit address (ADD2–ADD0) loaded into the internal control register through the DIN pin on rising SCLK edges. Valid combinations (000 to 111) select IN0 through IN7 respectively. The default channel after power-up is IN0, and channel can be changed dynamically without toggling CS.

What is the power consumption of ADC108S022CIMTX/NOPB in shutdown mode?

In shutdown mode (CS high), ADC108S022CIMTX/NOPB draws 30 nA typical at 3.0 V and 60 nA typical at 5.0 V, corresponding to 0.09 µW and 0.30 µW power consumption respectively. This ultra-low quiescent current enables energy-sensitive applications such as battery-backed sensor nodes and portable diagnostic equipment.

Is ADC108S022CIMTX/NOPB compatible with standard SPI interfaces?

Yes, ADC108S022CIMTX/NOPB is fully compatible with standard SPI, QSPI, and MICROWIRE interfaces. It uses CS as frame sync, SCLK for timing, DIN for control register loading, and DOUT for data output - all operating in standard mode 0 (CPOL = 0, CPHA = 0) with MSB-first transmission and no dummy cycles required.