Texas Instruments ADC084S051CIMM/NOPB

Overview

ADC084S051CIMM/NOPB from Texas Instruments is a low-power, 4-channel, 8-bit successive-approximation ADC with serial SPI-compatible interface, 200–500 ksps sample rate, ±0.09 LSB typical DNL, and operation from 2.7V to 5.25V supply. It integrates internal track-and-hold and multiplexed analog inputs (IN1–IN4), targeting portable data acquisition and embedded sensor monitoring.

For engineers reviewing the ADC084S051CIMM/NOPB datasheet, ADC084S051CIMM/NOPB pinout, ADC084S051CIMM/NOPB application, or ADC084S051CIMM/NOPB equivalent, key selection considerations include its guaranteed no-missing-codes performance, channel-to-channel crosstalk of −73 dB, 49.6 dB typical SNR at 40.2 kHz input, and power-down current of just 0.12 µW at 3V.

Technical Context

The ADC084S051CIMM/NOPB uses a charge-redistribution DAC architecture with internal track-and-hold, enabling precise sampling across four analog inputs in a single 10-lead VSSOP package. Its conversion sequence is synchronized to SCLK, requiring exactly 16 clock cycles per frame: 3 for track, 13 for hold/convert/readout, with MSB-first serial output on DOUT.

It operates without power-up delay or dummy conversions - the first result after power-on corresponds to IN1. The control register accepts 8-bit DIN input to select the next channel (ADD2:ADD0), while CS acts as both frame initiator and power-down enable, reducing supply current to sub-µA levels when high.

Key Specifications

Pinout & Package

ADC084S051CIMM/NOPB is housed in a 10-lead VSSOP (Package Number DGS0010A), 3.0 mm × 3.0 mm, 0.5 mm pitch, thermally enhanced for industrial ambient conditions.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-channel, 8-bit SAR ADC applications.

Compared with ADC084S021CIMM/NOPB and ADC084S101CIMM/NOPB, the ADC084S051CIMM/NOPB delivers optimal balance of speed (200–500 ksps), power (2.2 mW at 3V), and noise performance (49.6 dB SNR), making it the default choice for mid-bandwidth portable and industrial sensing where neither extreme low power nor maximum speed dominates the spec.

Availability

ADC084S051CIMM/NOPB is available at Aetrix Electronics and suitable for portable systems, remote data acquisition, instrumentation and control systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADC084S051CIMM/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 ADC084S051CIMM/NOPB belongs to TI's precision SAR ADC family designed for cost-sensitive, low-power, multi-channel data acquisition in portable and distributed sensing applications - emphasizing ease of integration, guaranteed specifications across temperature, and robust serial interface compatibility.

FAQ

What is the minimum and maximum sample rate supported by the ADC084S051CIMM/NOPB?

The ADC084S051CIMM/NOPB is fully specified from 200 ksps to 500 ksps. Unlike many SAR ADCs rated only at a single rate, its electrical characteristics - including DNL, INL, SNR, and THD - are guaranteed across this entire range. This eliminates derating uncertainty and simplifies timing margin analysis in variable-throughput systems. The device remains functional outside this range (down to 50 ksps, up to 1 Msps), but performance is not ensured beyond the 200–500 ksps band.

Does the ADC084S051CIMM/NOPB require an external reference voltage?

No, the ADC084S051CIMM/NOPB uses its VA supply pin as the reference - it is a ratiometric converter. The full-scale range is always 0 V to VA, and LSB size equals VA/256. This eliminates the need for a separate precision reference, reduces BOM count, and inherently rejects supply ripple when VA is well-bypassed. However, for highest accuracy, VA should be derived from a low-noise source such as a dedicated LDO or precision reference.

How does channel selection work on the ADC084S051CIMM/NOPB?

Channel selection is controlled via the 3-bit ADD2:ADD0 field in the 8-bit control register loaded through DIN. During each conversion frame, the ADC outputs the result for the currently selected channel while simultaneously accepting the address for the *next* channel. Valid combinations are: 000 → IN1 (default on power-up), 001 → IN2, 010 → IN3, 011 → IN4. Bits 7,6,2,1,0 are don't-care and may be set to any value.

What is the power consumption of the ADC084S051CIMM/NOPB in shutdown mode?

In shutdown mode - asserted by holding CS high - the ADC084S051CIMM/NOPB draws just 0.12 µW at +3V supply and 0.35 µW at +5V supply. This ultra-low quiescent current is achieved by disabling internal clocks, bias circuits, and the track-and-hold amplifier. Recovery to full operation occurs within one SCLK cycle after CS falls, with no power-up delay or invalid conversions required.

Is the ADC084S051CIMM/NOPB pin-compatible with other devices in the ADC084Sxx1 family?

Yes, the ADC084S051CIMM/NOPB is fully pin-compatible with all members of the ADC084Sxx1 family, including ADC084S021CIMM/NOPB and ADC084S101CIMM/NOPB. They share identical 10-pin VSSOP packaging, pin assignments, control register format, timing behavior, and power requirements. This enables direct substitution based solely on sample rate needs without PCB or firmware changes.