Texas Instruments ADC081S101CIMF

Overview

ADC081S101CIMF from Texas Instruments is a single-channel, 8-bit successive-approximation ADC with SPI/QSPI/MICROWIRE/DSP-compatible serial interface, operating at 0.5–1 Msps sample rates on a single 2.7V–5.25V supply. It features ±0.05 LSB typical INL, 49.7 dB typical SNR, and 2.0 mW (3V) / 10.0 mW (5V) normal-mode power consumption. Used in portable instrumentation for analog sensor digitization.

For engineers reviewing the ADC081S101CIMF datasheet, ADC081S101CIMF pinout, ADC081S101CIMF application, or ADC081S101CIMF equivalent, key selection criteria include guaranteed performance across 500 ksps–1 Msps, low-power shutdown mode (2.5 µW @ 5V), straight-binary output format, and compatibility with industrial-grade SOT-23/WSON packages.

Technical Context

The ADC081S101CIMF employs a charge-redistribution DAC core with internal track-and-hold, enabling precise sampling at up to 1 Msps. Its conversion timing is synchronized to the falling edge of CS, with acquisition time (tACQ) specified at ≤350 ns and aperture jitter at 30 ps.

Digital interface operation follows SPI-like framing: three leading zeros, eight MSB-first data bits, and four trailing zeros per conversion, clocked on SCLK falling edges. The device supports variable power management via CS-controlled shutdown, reducing supply current to 60 µA (active standby) or 500 nA (full shutdown).

Key Specifications

Pinout & Package

ADC081S101CIMF is available in a 6-lead SOT-23 package (CIMF suffix) with exposed pad grounded per TI recommendation. Pin functions are validated per SNAS310D Rev. January 2014.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADC081S051CIMF and ADC081S021CIMF, the ADC081S101CIMF delivers verified 1 Msps throughput with superior linearity and SNR-making it the only option among the three for applications demanding full-speed precision at the upper end of the 8-bit SAR ADC spectrum.

Availability

ADC081S101CIMF is available at Aetrix Electronics and suitable for portable instrumentation, remote sensor networks, and industrial panel meters requiring stable component supply and long-term production continuity.

Supply support for ADC081S101CIMF 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.

The ADC081Sxx1 family was designed specifically for cost-sensitive, low-power, single-channel measurement applications requiring guaranteed performance across wide sample rate ranges-not just at nominal conditions.

FAQ

What is the maximum guaranteed sample rate for ADC081S101CIMF?

The ADC081S101CIMF is fully specified and guaranteed to operate at up to 1 Msps across the industrial temperature range (−40°C to +85°C). This maximum rate is ensured under conditions of VA = +2.7V to +5.25V, fSCLK = 10 MHz to 20 MHz, and CL = 15 pF. Performance metrics including INL, SNR, and DNL remain valid at this rate per SNAS310D Rev. January 2014.

Does ADC081S101CIMF require an external reference voltage?

No, ADC081S101CIMF does not require an external reference. It uses its analog supply voltage (VA) as the reference, supporting input ranges from 0V to VA. This eliminates the need for a separate precision reference IC, simplifying design and reducing BOM cost-though supply rail noise directly impacts SNR, so proper decoupling (1 µF + 0.1 µF) is mandatory near the VA pin.

Can ADC081S101CIMF interface directly with a 1.8V microcontroller?

ADC081S101CIMF digital inputs (CS, SCLK) accept voltages up to +5.25V regardless of VA, enabling safe interfacing with 1.8V logic when VA ≥ 1.8V. However, SDATA output swing is rail-to-rail relative to VA, so if VA = 3.3V or 5V, a level shifter is required for reliable reception by a 1.8V MCU input. The device itself does not support 1.8V-only operation.

What is the function of the three leading zeros in ADC081S101CIMF's serial output frame?

The three leading zeros in the ADC081S101CIMF serial frame (total 15 bits: 3+8+4) serve as synchronization and timing alignment markers. They ensure that the first data bit (MSB) appears on the fourth SCLK falling edge after CS goes low, providing consistent setup time for the receiving controller. This fixed framing eliminates the need for start-bit detection or variable-length parsing in firmware.

How does ADC081S101CIMF enter and exit shutdown mode?

ADC081S101CIMF enters shutdown mode when CS is driven high before the tenth falling edge of SCLK after CS was asserted low. It exits shutdown and begins conversion on the next falling edge of CS. In shutdown, supply current drops to 500 nA (5V) or 60 µA (active standby), and SDATA enters high-impedance state. No reset sequence is required-operation resumes immediately upon CS assertion.