Texas Instruments ADC081S101 MWC

Overview

ADC081S101 from Texas Instruments is a single-channel, 8-bit successive-approximation analog-to-digital converter with SPI/QSPI/MICROWIRE/DSP-compatible serial interface, operating at 500 ksps to 1 Msps sample rates, 2.7V–5.25V supply, and −40°C to +85°C industrial temperature range-used in portable instrumentation for real-time sensor digitization.

For engineers reviewing the ADC081S101 datasheet, ADC081S101 pinout, ADC081S101 application, or ADC081S101 equivalent, key selection considerations include guaranteed DNL ±0.07 LSB (typ), SNR 49.7 dB (typ), power-down consumption of 2.5 µW at 5V, WSON/SOT-23 package compatibility, and straight-binary output timing aligned to SCLK falling edges.

Technical Context

The ADC081S101 implements a charge-redistribution DAC core with internal track-and-hold, where acquisition begins on the 13th rising edge of SCLK and sampling occurs on the falling edge of CS. Aperture delay is fixed at 3 ns with 30 ps aperture jitter, enabling stable AC performance up to 100 kHz input frequency.

Its serial interface delivers three leading zero bits, eight MSB-first data bits, and four trailing zeros across 16 SCLK falling edges per conversion. The device supports variable power management via CS-driven shutdown, reducing supply current to 60 µA (active standby) or 500 nA (full power-down) at 5.25V.

Key Specifications

Pinout & Package

ADC081S101 is available in 6-lead WSON (NGF) and SOT-23 (DBV) packages, both with identical pinout and footprint compatibility. Thermal resistance is 94°C/W (WSON) or 265°C/W (SOT-23), requiring appropriate PCB copper area for thermal management in high-throughput operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADC081S051 and ADC081S021, the ADC081S101 delivers verified 1 Msps throughput, tighter linearity (±0.07 LSB DNL), and superior SNR (49.7 dB), making it the optimal choice for time-critical, medium-fidelity embedded digitization where full-speed operation is essential.

Availability

ADC081S101 is available at Aetrix Electronics and suitable for portable systems, remote data acquisitions, and instrumentation and control systems requiring stable component supply, long-term industrial temperature support, and SPI-compatible ADC sourcing.

Supply support for ADC081S101 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 company specializing in analog, embedded processing, and connectivity technologies, with leadership in precision data converters and low-power signal chain solutions.

The ADC081S101 belongs to TI's single-channel, low-power SAR ADC family designed for space-constrained, battery-operated, and industrial sensor interface applications where simplicity, guaranteed specs across speed range, and minimal external components are critical.

FAQ

What is the maximum guaranteed sample rate for ADC081S101?

The ADC081S101 is fully specified and guaranteed to operate at up to 1 Msps across its entire industrial temperature range (−40°C to +85°C) and supply range (2.7V–5.25V). This is confirmed in the Electrical Characteristics table and Timing Specifications section of the SNAS310D datasheet, where all AC and DC parameters-including DNL, SNR, and tACQ-are ensured at 1 Msps.

Does ADC081S101 require an external voltage reference?

No, ADC081S101 does not require an external voltage reference. It uses its analog supply voltage (VA) as the conversion reference, supporting unipolar input ranges from 0V to VA. This eliminates external reference components and simplifies design, though supply rail noise must be minimized using proper bypassing (1 µF + 0.1 µF capacitors).

What package options are available for ADC081S101?

The ADC081S101 is offered in two RoHS-compliant, lead-free packages: 6-lead WSON (NGF, 2 mm × 2 mm, 0.5 mm pitch) and 6-lead SOT-23 (DBV, 2.9 mm × 1.6 mm). Both share identical pinout, electrical characteristics, and functional behavior-only thermal resistance differs (94°C/W for WSON vs. 265°C/W for SOT-23).

How does the power-down mode work on ADC081S101?

ADC081S101 enters shutdown mode when CS is driven high before the 10th falling edge of SCLK after conversion initiation. In shutdown, supply current drops to 500 nA (at 5.25V), and SDATA enters high-impedance state. Conversion resumes on the next CS falling edge, with no wake-up delay-enabling precise, event-triggered sampling with µW-level quiescent power.

Is ADC081S101 compatible with 3.3V microcontrollers?

Yes, ADC081S101 is fully compatible with 3.3V microcontrollers. Its digital inputs (CS, SCLK) accept voltages up to +5.25V regardless of VA, and its SDATA output swings rail-to-rail (0V to VA). When powered from 3.3V, SDATA outputs 0–3.3V logic levels, matching standard 3.3V CMOS I/O thresholds without level-shifting circuitry.