Texas Instruments ADC108S052CIMTX

Overview

ADC108S052 from Texas Instruments is a low-power, 8-channel, 10-bit successive-approximation ADC with conversion rates from 200 ksps to 500 ksps, independent analog (VA = 2.7V–5.25V) and digital (VD = 2.7V–VA) supplies, and SPI/QSPI/MICROWIRE-compatible serial interface. It operates across −40°C to +105°C and is used in portable instrumentation for multi-sensor signal acquisition.

For engineers reviewing the ADC108S052 datasheet, ADC108S052 pinout, ADC108S052 application, or ADC108S052 equivalent, key selection factors include its 16-pin TSSOP package, 10-bit resolution with ±0.4 LSB INL/DNL, 61.3 dB SINAD at 40.2 kHz, and configurable channel selection via DIN-controlled control register.

Technical Context

The ADC108S052 implements a charge-redistribution DAC-based successive-approximation architecture with integrated track-and-hold. Its 16-SCLK conversion cycle includes 3 cycles for acquisition and 13 for conversion/readout, delivering straight-binary output MSB-first on DOUT.

It supports independent VA and VD supplies, enabling noise isolation between analog and digital domains. Channel selection (IN0–IN7) is controlled by a 3-bit address (ADD2–ADD0) loaded into the control register via DIN on rising SCLK edges following CS assertion.

Key Specifications

Pinout & Package

ADC108S052 is housed in a 16-lead TSSOP (Package Number PW0016A) with 0.65 mm pitch, optimized for compact 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 MAX11100ETE+, ADC108S052 uniquely combines independent analog/digital supplies, 0.09 µW shutdown power, and guaranteed −40°C to +105°C operation-making it optimal for rugged, low-power, multi-rail embedded data acquisition.

Availability

ADC108S052 is available at Aetrix Electronics and suitable for automotive navigation, portable medical instruments, and industrial process control requiring stable component supply and long-term manufacturability.

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 ICs.

The ADC108S052 belongs to TI's precision SAR ADC product line, designed specifically for low-power, multi-channel signal acquisition in portable, automotive, and industrial instrumentation where supply flexibility and thermal robustness are critical.

FAQ

What is the maximum clock frequency supported by ADC108S052?

The ADC108S052 supports a maximum SCLK frequency of 8 MHz under specified operating conditions (VA = VD = 2.7V–5.25V, TA = −40°C to +105°C). At this rate, the device achieves its top 500 ksps throughput. Exceeding 8 MHz may cause timing violations or degraded AC performance, as confirmed in the SNAS337G datasheet Section "AC Electrical Characteristics".

Does ADC108S052 require an external reference voltage?

No, ADC108S052 does not require an external reference. It uses the analog supply voltage (VA) as its internal reference, establishing a full-scale range of 0V to VA. This simplifies design by eliminating external reference components, though VA must be stable and well-bypassed-as detailed in the "Typical Application Circuit" (Figure 37) of the ADC108S052 datasheet.

How is channel selection implemented on ADC108S052?

Channel selection on ADC108S052 is performed via a 3-bit address (ADD2–ADD0) loaded into the control register through the DIN pin on the first 8 rising edges of SCLK after CS falls. Valid combinations (000 to 111) select IN0 through IN7 respectively, as defined in Table 3 of the SNAS337G datasheet. The default channel upon power-up is IN0.

What is the power consumption of ADC108S052 in shutdown mode?

In shutdown mode (CS high, fSCLK = 0 ksps), ADC108S052 consumes 30 nA typical at 5.0V and 10 nA typical at 3.0V-equivalent to 0.30 µW and 0.09 µW respectively. This ultra-low quiescent power enables energy-efficient wake-on-event architectures in battery-powered systems, as verified in the "Power Supply Characteristics" table of the ADC108S052 datasheet.

Is ADC108S052 compatible with standard SPI interfaces?

Yes, ADC108S052 is fully compatible with SPI, QSPI, and MICROWIRE serial protocols. It uses standard 4-wire operation (CS, SCLK, DIN, DOUT) with MSB-first straight-binary output, 16-clock-frame framing, and CS-driven enable/disable timing. No mode configuration or level-shifting is needed for interfacing with common microcontrollers such as MSP430, C2000, or ARM Cortex-M series.