Texas Instruments ADC088S022CIMT

Overview

ADC088S022 from Texas Instruments is an 8-channel, 8-bit successive-approximation ADC with SPI-compatible serial interface, 50–200 ksps throughput, ±0.2 LSB max INL/DNL, and independent 2.7V–5.25V analog/digital supplies - used for multi-sensor data acquisition in portable instrumentation and automotive subsystems.

For engineers reviewing the ADC088S022 datasheet, ADC088S022 pinout, ADC088S022 application, or ADC088S022 equivalent, this page delivers verified electrical specs, TSSOP-16 pin mapping, real-world use cases in medical instruments and mobile communications, and two validated alternative parts with documented functional trade-offs.

Technical Context

The ADC088S022 employs a charge-redistribution DAC architecture with integrated track-and-hold, enabling full-resolution acquisition in the first conversion after power-up. Its 8-input multiplexer supports channel selection via 3-bit address (ADD2–ADD0) loaded on DIN during CS assertion.

Serial communication follows SPI/QSPI/MICROWIRE timing: CS falling edge initiates frame; SCLK (0.8–3.2 MHz) controls both conversion and data transfer; DOUT outputs 8-bit straight-binary MSB-first over 16 cycles (4 leading zeros + 8 data bits + 4 trailing zeros). Power-down mode reduces consumption to 0.03 µW at 3V.

Key Specifications

Pinout & Package

Packaged in 16-lead TSSOP (thin shrink small-outline package) with 0.65 mm pitch, thermal resistance θ_JA = 96°C/W on 4-layer PCB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822U and MAX11100ETE+, the ADC088S022 uniquely combines independent analog/digital supplies, sub-µW shutdown, and VA-as-reference simplicity - making it optimal for portable, multi-voltage, and thermally demanding applications where supply flexibility and power efficiency are primary constraints.

Availability

ADC088S022 is available at Aetrix Electronics and suitable for automotive navigation, portable medical instruments, mobile communications baseband, and industrial process monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADC088S022 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 power management ICs.

The ADC088S022 belongs to TI's precision SAR ADC product line, designed specifically for cost-sensitive, low-power, multi-channel data acquisition in portable and harsh-environment applications - emphasizing supply flexibility, fast wake-up, and robust serial interface compatibility.

FAQ

What is the maximum clock frequency supported by ADC088S022?

The ADC088S022 supports a maximum SCLK frequency of 3.2 MHz, as specified in the AC Electrical Characteristics table. Operation above this limit may cause timing violations in conversion and serial readout, resulting in invalid output codes. The minimum clock frequency is 0.8 MHz; using lower frequencies extends throughput time but does not affect accuracy.

Does ADC088S022 require an external voltage reference?

No, the ADC088S022 uses its analog supply voltage (VA) as the internal reference - eliminating the need for an external reference. The full-scale range is 0V to VA, and LSB size equals VA/256. This simplifies design and reduces component count, provided VA is well-bypassed and stable within ±1%.

How does ADC088S022 handle channel selection during continuous conversion mode?

In continuous mode, the ADC088S022 loads the next channel address from DIN during the first 8 rising SCLK edges after CS falls. The ADD2–ADD0 bits determine which of IN0–IN7 is sampled next. After each 16-cycle frame, the device automatically re-enters track mode and uses the newly loaded address - enabling programmable scan sequences without host intervention.

What is the purpose of separate AGND and DGND pins on ADC088S022?

Separate AGND and DGND pins minimize noise coupling from digital switching into the analog signal path. AGND returns analog supply and input currents; DGND returns digital supply and interface currents. They must be connected at a single point near the ADC088S022 - typically at the star ground near bypass capacitors - to prevent ground loops and preserve ±0.2 LSB linearity performance.

Can ADC088S022 operate with VA = 5.0V and VD = 3.3V?

Yes, ADC088S022 supports VA = 5.0V and VD = 3.3V, as long as VD remains within +2.7V to VA. This configuration allows interfacing with 3.3V logic families while powering analog circuitry at 5V for improved SNR. DOUT output levels will be referenced to VD (0.4V low, VD−0.5V high), ensuring safe logic-level compatibility.