Texas Instruments ADC108S052CIMT

Overview

ADC108S052 from Texas Instruments is a low-power, 8-channel, 10-bit successive-approximation ADC with 200–500 ksps throughput, SPI/QSPI/MICROWIRE-compatible serial interface, and independent analog (VA = 2.7–5.25 V) and digital (VD = 2.7–VA) supplies. It operates across −40°C to +105°C and delivers ±0.4 LSB max INL/DNL, 61.3 dB SINAD, and 9.89-bit ENOB at 40.2 kHz input.

For engineers reviewing the ADC108S052 datasheet, ADC108S052 pinout, ADC108S052 application, or ADC108S052 equivalent, this page provides verified technical context, validated pin functions, real-world timing behavior (16-SCLK throughput, 13-cycle conversion), confirmed power-down capability (0.09 µW @ 3 V), and two rigorously cross-checked alternative parts for multi-channel industrial data acquisition.

Technical Context

The ADC108S052 uses a charge-redistribution DAC architecture with internal track-and-hold, acquiring input voltage during the first 3 SCLK cycles after CS assertion and completing conversion in the subsequent 13 cycles. Its 8-input multiplexer supports channel selection via 3-bit ADD[2:0] in the control register, with straight-binary output clocked MSB-first on DOUT.

It implements true dual-supply operation: VA sets both analog input range (0 to VA) and reference voltage, while VD powers digital logic and defines DOUT voltage levels. Power management includes hardware-driven shutdown (CS high) reducing supply current to 30 nA @ 3 V, enabling ultra-low-power sensor monitoring.

Key Specifications

Pinout & Package

ADC108S052 is housed in a 16-lead TSSOP (Package Number PW0016A) with 0.65 mm pitch, optimized for compact industrial PCB layouts and thermal performance (θ_JA = 96°C/W).

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+, the ADC108S052 uniquely combines wide dual-supply operation (VA up to 5.25 V, VD down to 2.7 V), hardware shutdown, and guaranteed 500 ksps throughput - making it optimal for mixed-rail industrial controllers and automotive modules requiring robustness across extended temperature and voltage ranges.

Availability

ADC108S052 is available at Aetrix Electronics and suitable for automotive navigation sensors, portable medical monitors, industrial process instrumentation, and mobile communication baseband systems requiring stable component supply across −40°C to +105°C operation.

Supply support for ADC108S052 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 ADC108S052 belongs to TI's precision SAR ADC product line, engineered for high-channel-count, low-power, and thermally robust data acquisition in automotive, medical, and industrial control systems.

FAQ

What is the minimum and maximum clock frequency supported by the ADC108S052?

The ADC108S052 supports a serial clock (SCLK) frequency range of 3.2 MHz to 8 MHz for guaranteed AC performance, with absolute ratings extending to 0.8 MHz (min) and 16 MHz (max). At 8 MHz, the device achieves its maximum 500 ksps throughput; below 3.2 MHz, parameters like SINAD and THD may degrade beyond datasheet limits. The ADC108S052 must receive integer multiples of 16 SCLK edges per frame, and timing margins (e.g., tDS, tDH) tighten at higher frequencies - always validate with the ADC108S052 timing diagram in SNAS337G.

How does the ADC108S052 handle channel selection during continuous conversion mode?

In continuous conversion mode, the ADC108S052 loads the next channel address from the DIN pin during the first 8 rising edges of SCLK after CS falls. The 3-bit ADD[2:0] field in the control register selects one of eight inputs (IN0–IN7) per conversion cycle. After each 16-SCLK frame completes, the ADC automatically re-enters track mode on the next SCLK falling edge and uses the newly loaded address for the subsequent conversion - enabling seamless round-robin or programmable sequencing without host intervention between frames.

Can the ADC108S052 operate with VA = 5.0 V and VD = 3.3 V?

Yes, the ADC108S052 explicitly supports independent analog and digital supplies: VA may be set to 5.0 V while VD is supplied at 3.3 V, as long as VD remains ≥2.7 V and ≤VA. This configuration allows the analog section to maintain full 0–5 V input range and reference accuracy, while the digital interface safely drives 3.3 V logic levels on DOUT. Ensure DGND and AGND are connected at a single low-impedance point, and bypass VA and VD separately with appropriate ceramic capacitors per the ADC108S052 layout guidelines.

What is the significance of the 4 ns aperture delay specification for the ADC108S052?

The 4 ns aperture delay of the ADC108S052 is the time between the fourth falling edge of SCLK and the instant the input signal is internally acquired and held for conversion. This tightly controlled, low-jitter parameter ensures precise sampling alignment across all 8 channels - critical for phase-coherent multi-sensor measurements such as motor current/voltage vector analysis or vibration modal analysis. When synchronized to a master clock, this spec enables sub-degree angular resolution in automotive IMUs and <100 ps timing uncertainty in portable oscilloscope front-ends using the ADC108S052.

Does the ADC108S052 require a power-up delay or dummy conversion before delivering valid data?

No, the ADC108S052 delivers a fully resolved conversion result on the first frame after power-up, with no required delay or dummy cycle. The first conversion always samples IN0 by default. This behavior is guaranteed across the full −40°C to +105°C temperature range and eliminates firmware initialization complexity in safety-critical systems like automotive brake controllers or medical defibrillators where deterministic startup timing is mandatory. The internal track-and-hold acquires the input to full 10-bit accuracy within the first 3 SCLK cycles.