Texas Instruments ADC101S051CIMFX/NOPB

Overview

ADC101S051CIMFX/NOPB from Texas Instruments is a single-channel, 10-bit successive-approximation ADC with SPI/QSPI/MICROWIRE/DSP-compatible serial interface, operating at 200–500 ksps sample rates, 2.7V–5.25V supply, and −40°C to +85°C temperature range. It delivers 61.6 dB SNR (typ), ±0.15 LSB INL (typ), and 2.7 mW power consumption at 3.6V - used in portable instrumentation for precision analog signal digitization.

For engineers reviewing the ADC101S051CIMFX/NOPB datasheet, ADC101S051CIMFX/NOPB pinout, ADC101S051CIMFX/NOPB application, or ADC101S051CIMFX/NOPB equivalent, key selection criteria include guaranteed monotonicity over full temperature range, low-power shutdown mode (2.6 µW at 5.25V), straight-binary output format, and compatibility with microprocessor/DSP host interfaces requiring minimal board space and low EMI.

Technical Context

The ADC101S051CIMFX/NOPB implements a charge-redistribution DAC core with internal track-and-hold, enabling precise sampling of analog inputs up to VA (2.7V–5.25V) with 350 ns minimum acquisition time. Its conversion timing is fully synchronized to SCLK falling edges, with aperture jitter of 30 ps and full-power bandwidth of 8 MHz (at 3V) or 11 MHz (at 5V).

It operates in two modes: normal (CS low, active conversion) and shutdown (CS high, 500 nA supply current). The serial interface outputs three leading zeros, ten data bits (MSB first), and two trailing zeros per frame across SDATA on SCLK falling edges - compatible with standard SPI controllers without protocol translation.

Key Specifications

Pinout & Package

ADC101S051CIMFX/NOPB is packaged in a 6-lead WSON (NGF0006A) with exposed thermal pad, optimized for compact PCB layouts and thermal performance (θ_JA = 94°C/W). Pin 1 is VA (analog supply), Pin 2 is GND, Pin 3 is VIN (analog input), Pin 4 is SCLK (digital clock input), Pin 5 is SDATA (serial data output), and Pin 6 is CS (chip select).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit SAR ADC applications.

Compared with ADC101S021CIMF/NOPB and ADC101S101CIMF/NOPB, the ADC101S051CIMFX/NOPB provides optimal balance of speed (200–500 ksps), power efficiency, and temperature robustness for mid-range data acquisition - avoiding unnecessary overhead of the 1 Msps part while exceeding the capability of the 200 ksps variant.

Availability

ADC101S051CIMFX/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, remote data acquisition, and automotive subsystems requiring stable component supply, long-term manufacturability, and AEC-Q100-compliant sourcing.

Supply support for ADC101S051CIMFX/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 expertise in precision data converters and industrial-grade ICs.

The ADC101S051CIMFX/NOPB belongs to TI's precision SAR ADC product line, designed specifically for cost-sensitive, space-constrained applications requiring reliable 10-bit performance across extended temperature ranges and variable power budgets.

FAQ

What is the maximum sample rate supported by the ADC101S051CIMFX/NOPB?

The ADC101S051CIMFX/NOPB is fully specified for operation from 200 ksps up to 500 ksps. While it can function at up to 1 Msps under certain conditions, guaranteed electrical performance - including INL, DNL, SNR, and THD - applies only within the 200–500 ksps range per the official datasheet SNAS303I. For designs requiring assured 1 Msps operation, ADC101S101CIMF/NOPB is the validated alternative.

Does the ADC101S051CIMFX/NOPB require an external reference voltage?

No, the ADC101S051CIMFX/NOPB uses its analog supply voltage (VA) as the reference, supporting input ranges from 0 V to VA. This eliminates the need for an external reference but means supply noise directly impacts measurement accuracy - hence the requirement for tight local decoupling (1 µF + 0.1 µF capacitors near VA pin) as specified in the ADC101S051CIMFX/NOPB datasheet.

Is the ADC101S051CIMFX/NOPB pin-compatible with other devices in the ADC101S family?

Yes, the ADC101S051CIMFX/NOPB is fully pin- and function-compatible with ADC101S021CIMF/NOPB and ADC101S101CIMF/NOPB, as confirmed in Table 1 of the SNAS303I datasheet. All share identical 6-pin WSON/SOT-23 footprints, pin assignments, serial interface timing, and registerless command structure - enabling drop-in replacement based on required sample rate.

What is the quiet time (tQUIET) requirement between conversions for the ADC101S051CIMFX/NOPB?

The ADC101S051CIMFX/NOPB requires a minimum quiet time (tQUIET) of 50 ns between the end of one conversion (16th SCLK falling edge or CS rising edge) and the next CS falling edge. This interval allows bus relinquishment and internal state stabilization. Failure to observe tQUIET may result in invalid data or increased aperture jitter, degrading effective resolution in high-speed sampling scenarios.

How does the power-down mode work on the ADC101S051CIMFX/NOPB?

The ADC101S051CIMFX/NOPB 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 (typ) at 25°C, reducing power consumption to 2.6 µW at 5.25V. The device remains in shutdown until CS falls again, with 1 µs power-up time required before valid conversion - a feature leveraged in duty-cycled sensor systems to extend battery life.