Texas Instruments ADC081S051CIMF/NOPB

Overview

ADC081S051CIMF/NOPB from Texas Instruments is a single-channel, 8-bit successive-approximation ADC with SPI/QSPI/MICROWIRE-compatible serial interface, 200–500 ksps sample rate, ±0.06 LSB typical INL, 49.6 dB SNR at 100 kHz input, and operation from 2.7V to 5.25V supply - used in portable data acquisition front-ends where low power and compact size are critical.

For engineers reviewing the ADC081S051CIMF/NOPB datasheet, ADC081S051CIMF/NOPB pinout, ADC081S051CIMF/NOPB application, or ADC081S051CIMF/NOPB equivalent, key selection considerations include guaranteed no-missing-codes performance across industrial temperature (−40°C to +85°C), 6-lead WSON/SOT-23 package compatibility, shutdown current as low as 2.6 µW at 5.25V, and full specification over variable throughput - not just fixed-rate operation.

Technical Context

The ADC081S051CIMF/NOPB employs a charge-redistribution DAC core with internal track-and-hold, enabling precise sampling up to 500 ksps without external hold circuitry. Its conversion timing is fully synchronous to SCLK, with aperture jitter of 30 ps and acquisition time ≤350 ns.

Serial output uses straight binary coding: three leading zeros, eight data bits (MSB first), then four trailing zeros - compatible with standard microcontroller SPI peripherals without protocol translation. Chip select (CS) directly initiates conversion and controls TRI-STATE output enable/disable timing per cycle.

Key Specifications

Pinout & Package

ADC081S051CIMF/NOPB is available in a 6-lead WSON (2.0 mm × 2.0 mm, 0.5 mm pitch) and SOT-23 package. Both packages share identical pinout and thermal characteristics per TI SNAS309F.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADC081S021CIMF/NOPB and ADC081S101CIMF/NOPB, the ADC081S051CIMF/NOPB delivers optimal balance of throughput headroom, power efficiency, and dynamic performance for mid-speed embedded sensing - avoiding overdesign while ensuring margin for transient signal capture.

Availability

ADC081S051CIMF/NOPB is available at Aetrix Electronics and suitable for portable medical devices, industrial remote I/O modules, and smart energy metering subsystems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ADC081S051CIMF/NOPB 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 experience in precision data converters and industrial-grade ICs.

The ADC081S051CIMF/NOPB belongs to TI's precision SAR ADC family designed for cost-sensitive, space-constrained applications demanding reliable performance across voltage and temperature - particularly in portable instrumentation and distributed sensing.

FAQ

What is the maximum clock frequency supported by ADC081S051CIMF/NOPB?

The ADC081S051CIMF/NOPB supports SCLK frequencies from 25 kHz to 20 MHz. At 20 MHz, it achieves up to 1 Msps throughput under optimized timing conditions. However, its guaranteed electrical specifications (INL, SNR, etc.) apply strictly within the 4–10 MHz SCLK range and 200–500 ksps sample rate window per the SNAS309F datasheet. Operation outside these ranges may function but lacks tested performance assurance.

Does ADC081S051CIMF/NOPB require an external reference voltage?

No, ADC081S051CIMF/NOPB does not require an external reference. It uses its analog supply voltage (VA) as the reference, with full-scale range defined as 0V to VA. This eliminates the need for a precision voltage reference IC, reducing BOM cost and board area - though supply noise directly impacts SNR, so proper decoupling (1 µF + 0.1 µF) is mandatory.

Can ADC081S051CIMF/NOPB interface directly with a 3.3V microcontroller SPI port?

Yes, ADC081S051CIMF/NOPB supports direct connection to 3.3V microcontrollers. Its digital inputs (CS, SCLK) accept voltages from −0.3V to 5.25V regardless of VA, and SDATA output swings rail-to-rail (0V to VA). When VA = 3.3V, logic levels align natively; when VA = 5.25V, SDATA high level exceeds 3.3V logic thresholds, so a series resistor or level shifter may be needed depending on MCU input tolerance.

What is the meaning of "no missing codes" in ADC081S051CIMF/NOPB specifications?

"No missing codes" means that every possible 8-bit output code (0x00 to 0xFF) will appear at the SDATA output for some valid analog input voltage within the 0V to VA range. This is guaranteed across the full industrial temperature range (−40°C to +85°C) and supply range (2.7V–5.25V), ensuring monotonic transfer function and predictable behavior in closed-loop control or threshold-detection applications using ADC081S051CIMF/NOPB.

How does the power-down mode of ADC081S051CIMF/NOPB work?

Power-down mode is activated by driving CS high before the 10th falling edge of SCLK after a conversion start. In this state, ADC081S051CIMF/NOPB draws only 500 nA supply current (typical) at 5.25V, reducing power consumption to 2.6 µW. The device remains in shutdown until CS falls again, with 1 µs wake-up time to full operation - enabling rapid response in event-triggered sampling architectures.