Texas Instruments ADC088S102CIMT

Overview

ADC088S102 from Texas Instruments is an 8-channel, 8-bit successive-approximation ADC with 500 kSPS to 1 MSPS throughput, independent analog (VA: +2.7V to +5.25V) and digital (VD: +2.7V to VA) supplies, and SPI/QSPI/MICROWIRE-compatible serial interface. It operates across −40°C to +105°C and delivers ±0.2 LSB INL and ±0.3 LSB DNL at 5 V, serving as a compact, low-power data acquisition front-end in automotive navigation and portable instrumentation.

For engineers reviewing the ADC088S102 datasheet, ADC088S102 pinout, ADC088S102 application, or ADC088S102 equivalent, this page provides verified technical context, validated pin functions, real-world application mappings, confirmed alternatives, and supply-chain support for industrial embedded designs requiring stable 8-bit multichannel sampling under extended temperature conditions.

Technical Context

The ADC088S102 implements a charge-redistribution DAC-based successive-approximation architecture with integrated track-and-hold. Its 16-cycle conversion sequence includes 3 SCLK cycles in track mode (input acquisition) followed by 13 SCLK cycles in hold/convert mode (binary search and serial output).

It supports channel-selectable sampling via an 8-bit control register loaded on DIN during the first 8 rising SCLK edges after CS fall, with ADD2–ADD0 bits selecting one of eight analog inputs (IN0–IN7). Output coding is straight binary, LSB = VA/256, and DOUT is active-low-enabled with high-impedance state when CS is high.

Key Specifications

Pinout & Package

ADC088S102 is housed in a 16-lead TSSOP (Package PW0016A), with 8 analog inputs (IN0–IN7), dual ground separation (AGND/DGND), independent supplies (VA/VD), and SPI-compatible digital I/O (CS/SCLK/DIN/DOUT).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit multichannel ADC applications.

Compared with ADS7822U and MAX11100ETE+, the ADC088S102 uniquely balances 1 MSPS throughput, 8-channel count, dual-supply flexibility, and full industrial temperature support - making it optimal for space-constrained, wide-temp embedded systems needing verified 8-bit linearity without over-specifying resolution.

Availability

ADC088S102 is available at Aetrix Electronics and suitable for automotive navigation, portable instrumentation, and industrial process control requiring stable component supply across extended temperature and voltage ranges.

Supply support for ADC088S102 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 automotive and industrial qualification expertise.

The ADC088S102 belongs to TI's precision data acquisition portfolio, designed specifically for cost-sensitive, multichannel, low-power embedded systems demanding robust operation from −40°C to +105°C without external reference or buffering.

FAQ

What is the absolute maximum analog input voltage for the ADC088S102?

The absolute maximum analog input voltage for the ADC088S102 is VA + 0.3 V, but the functional operating range is strictly 0 V to VA. Exceeding VA forward-biases internal ESD diodes, risking latch-up or measurement inaccuracy. For reliable operation, analog inputs must remain within 0 V to VA, with VA itself rated from +2.7 V to +5.25 V per the datasheet. The ADC088S102 uses VA as its reference, so maintaining VA stability directly determines full-scale accuracy.

Does the ADC088S102 require an external reference voltage?

No, the ADC088S102 does not require an external reference voltage. It uses the analog supply voltage (VA) as its internal reference, with LSB = VA / 256. This simplifies design by eliminating external reference components and associated layout complexity. However, VA must be well-bypassed (1 µF + 0.1 µF ceramics within 1 cm) and kept low-noise, as any ripple or drift on VA directly modulates conversion accuracy. The ADC088S102 is specified to operate with VA from +2.7 V to +5.25 V.

How many clock cycles are required to complete one conversion on the ADC088S102?

The ADC088S102 requires exactly 16 SCLK cycles per conversion frame. The first 3 cycles are used for track-mode acquisition of the selected input channel; the remaining 13 cycles perform hold-mode conversion and serial output of the 8-bit result (MSB first on SCLK falling edges 5–12), plus leading/trailing zeros. This fixed 16-cycle timing enables deterministic firmware scheduling and eliminates variable-latency concerns in real-time control loops using the ADC088S102.

Can the ADC088S102 interface directly with a 1.8 V microcontroller SPI port?

No - the ADC088S102 digital inputs (CS, SCLK, DIN) require VIH ≥2.1 V at +2.7–3.6 V VA/VD and ≥2.4 V at +4.75–5.25 V, making direct connection to a 1.8 V MCU SPI port non-compliant. Level shifting is required. However, the ADC088S102's VD can be set to match the MCU's IOVDD (e.g., 3.3 V), and its DOUT output swing is VD − 0.5 V (min), ensuring compatibility when VD ≥ 2.7 V. The ADC088S102 thus supports mixed-voltage systems but not native 1.8 V logic interfacing.

What is the purpose of separate AGND and DGND pins on the ADC088S102?

Separate AGND and DGND pins on the ADC088S102 enable physical isolation of analog and digital return paths on the PCB, reducing noise coupling from digital switching transients into the sensitive analog conversion circuitry. AGND carries return current for VA and analog inputs; DGND carries return current for VD and digital I/O. They must be joined at a single point - typically at the ADC's ground pad or via a star ground - to avoid ground loops while preserving noise separation. This architecture is critical to achieving the ADC088S102's specified ±0.2 LSB INL and 49.2 dB SINAD.