Texas Instruments ADC108S022CIMT/NOPB

Overview

ADC108S022CIMT/NOPB from Texas Instruments is a low-power, 8-channel, 10-bit successive-approximation ADC with 50–200 ksps throughput, SPI/QSPI/MICROWIRE-compatible serial interface, and independent analog/digital supplies (VA = 2.7–5.25 V, VD = 2.7–VA). It operates across −40°C to +105°C and delivers ±0.3 LSB max INL/DNL for precision sensor data acquisition in automotive navigation and portable medical instrumentation.

For engineers reviewing the ADC108S022CIMT/NOPB datasheet, ADC108S022CIMT/NOPB pinout, ADC108S022CIMT/NOPB application, or ADC108S022CIMT/NOPB equivalent, this page provides verified pin functions, real-world timing behavior (13-cycle conversion + 3-cycle acquisition), power-down current (0.09 µW @ 3 V), channel isolation (79.8 dB), and validated alternatives for multi-channel industrial sensing systems.

Technical Context

The ADC108S022CIMT/NOPB uses a charge-redistribution DAC architecture with internal track-and-hold, enabling full-resolution acquisition in the first conversion after power-up without dummy cycles. Its 16-SCLK frame includes 3 SCLK cycles for track mode and 13 for hold/convert/readout, with MSB-first straight-binary output on DOUT.

It supports dynamic input selection via an 8-bit control register (ADD2–ADD0 bits select IN0–IN7), accepts analog inputs from 0 V to VA, and features separate AGND/DGND pins to minimize digital noise coupling into analog conversion. The device maintains guaranteed performance over 0.8–3.2 MHz SCLK and tolerates up to 16 MHz clock frequency.

Key Specifications

Pinout & Package

ADC108S022CIMT/NOPB is housed in a 16-lead TSSOP (Package Number PW), with 8 analog inputs (IN0–IN7), dual ground separation (AGND/DGND), independent analog/digital supplies (VA/VD), and SPI-compatible digital interface (CS, SCLK, DIN, DOUT).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7953IRHBT and MAX11100ETK+, ADC108S022CIMT/NOPB uniquely balances ultra-low shutdown power (0.09 µW), wide dual-supply flexibility (2.7–5.25 V VA, 2.7–VA VD), and guaranteed −40°C to +105°C operation - making it optimal for cost-sensitive, thermally demanding, battery-backed industrial and automotive sensor hubs.

Availability

ADC108S022CIMT/NOPB is available at Aetrix Electronics and suitable for automotive navigation systems, portable medical instruments, industrial process monitors, and mobile communication baseband modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADC108S022CIMT/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 over 90 years of innovation in precision data converters and industrial-grade ICs.

The ADC108S022CIMT/NOPB belongs to TI's precision SAR ADC product line, engineered for low-power, multi-channel sensor signal conditioning in automotive, medical, and industrial applications where reliability across extreme temperatures is critical.

FAQ

What is the minimum and maximum SCLK frequency supported by ADC108S022CIMT/NOPB?

The ADC108S022CIMT/NOPB ensures full specification compliance over 0.8 MHz to 3.2 MHz SCLK. It remains functional up to 16 MHz, but timing margins and AC performance (e.g., SINAD, THD) are only guaranteed within the 0.8–3.2 MHz range per the datasheet. At 3.2 MHz, the device achieves its rated 200 ksps throughput with 16 SCLK cycles per conversion frame.

Does ADC108S022CIMT/NOPB require a power-up delay or dummy conversion before delivering valid data?

No. The ADC108S022CIMT/NOPB delivers a fully accurate 10-bit result for IN0 on the first conversion after power-up, with no required delay or dummy cycle. This is enabled by its internal track-and-hold and charge-redistribution architecture, which acquires and converts the input signal to full resolution within the initial 16-SCLK frame.

How does the ADC108S022CIMT/NOPB handle channel selection during continuous conversion mode?

In continuous mode, the ADC108S022CIMT/NOPB loads the next channel address via the DIN pin during the first 8 rising SCLK edges after CS falls. The ADD2–ADD0 bits in the control register determine the subsequent input (IN0–IN7). Each 16-SCLK frame sequences one channel, and the device automatically re-enters track mode after the N×16th rising SCLK edge to begin acquisition for the next selected channel.

Can ADC108S022CIMT/NOPB operate with VA = 5 V and VD = 3.3 V?

Yes. The ADC108S022CIMT/NOPB permits VD as low as +2.7 V and up to VA, so VA = 5 V and VD = 3.3 V is a valid configuration. This allows clean 5 V analog reference while interfacing to 3.3 V logic controllers. Ensure DGND is tied to the 3.3 V domain ground and AGND to the 5 V analog ground, with star-point connection to avoid ground loops.

What is the purpose of the DONTC bits in the ADC108S022CIMT/NOPB control register?

The DONTC bits (bits 7, 6, 2, 1, 0) in the ADC108S022CIMT/NOPB control register are "don't care" positions - their logic state has no effect on channel selection or device operation. Only bits 5–3 (ADD2–ADD0) determine the input channel (IN0–IN7); all other bits may be set to 0 or 1 without altering ADC108S022CIMT/NOPB behavior.