Texas Instruments ADC084S021CIMM/NOPB

Overview

ADC084S021CIMM/NOPB from Texas Instruments is a 4-channel, 8-bit successive-approximation ADC with serial SPI-compatible interface, 50–200 ksps sample rate range, ±0.04 LSB typical INL/DNL, and 49.6 dB typical SNR. It operates from a single 2.7–5.25 V supply and delivers low-power performance (1.6 mW at 3 V) for portable data acquisition systems.

For engineers reviewing the ADC084S021CIMM/NOPB datasheet, ADC084S021CIMM/NOPB pinout, ADC084S021CIMM/NOPB application, or ADC084S021CIMM/NOPB equivalent, key selection considerations include its guaranteed 50–200 ksps operation across voltage and temperature, channel-selectable analog inputs (IN1–IN4), track-and-hold architecture, and compatibility with SPI/QSPI/MICROWIRE host interfaces.

Technical Context

The ADC084S021CIMM/NOPB implements a charge-redistribution SAR architecture with integrated track-and-hold, enabling full conversion immediately after power-up without dummy cycles. Its control logic accepts 8-bit DIN commands to select input channels (IN1–IN4) prior to each conversion, with output data clocked MSB-first on DOUT synchronized to SCLK falling edges.

Operation is framed by CS: a falling edge initiates track mode (3 SCLK cycles), followed by hold/convert mode (13 SCLK cycles), yielding 16-cycle serial frames. The device enters power-down when CS is high, reducing consumption to 0.12 µW (3 V) or 0.35 µW (5 V), and supports variable power management via supply voltage scaling.

Key Specifications

Pinout & Package

The ADC084S021CIMM/NOPB is housed in a 10-pin VSSOP package (3.00 mm × 3.00 mm), optimized for space-constrained PCBs and industrial temperature operation (–40°C to +85°C).

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, the ADC084S051CIMM/NOPB trades lower power for higher speed, while the ADC104S021CIMM/NOPB provides 2 extra bits of resolution at higher power and cost - both retain identical pinout and SPI timing, easing migration within the same family.

Availability

ADC084S021CIMM/NOPB is available at Aetrix Electronics and suitable for portable data loggers, industrial sensor nodes, medical vital sign sensors, and test & measurement front-ends requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADC084S021CIMM/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 IC design.

The ADC084S021CIMM/NOPB belongs to TI's precision SAR ADC product line, engineered for low-power, multi-channel data acquisition in portable, remote, and distributed sensing applications where size, energy efficiency, and guaranteed parametric performance are critical.

FAQ

What is the minimum and maximum sample rate supported by the ADC084S021CIMM/NOPB?

The ADC084S021CIMM/NOPB is fully specified from 50 ksps to 200 ksps across its entire operating range (2.7–5.25 V, –40°C to +85°C). Unlike many ADCs rated only at nominal conditions, this range is guaranteed in production - no derating required for voltage or temperature variations. This makes ADC084S021CIMM/NOPB suitable for designs where sample rate may vary dynamically under real-world conditions.

Does the ADC084S021CIMM/NOPB require external reference voltage or calibration?

No. The ADC084S021CIMM/NOPB uses an internal reference derived from VA, eliminating need for external reference components. It also requires no power-up delay or dummy conversions - the first result (IN1) is valid immediately after VA stabilizes. Offset and full-scale errors are trimmed at wafer test, with typical values of ±0.7 LSB, so system-level calibration is optional unless sub-LSB accuracy is required.

How does the ADC084S021CIMM/NOPB handle channel selection during continuous conversion?

The ADC084S021CIMM/NOPB selects the input channel for the *next* conversion via the 3-bit ADD2–ADD0 field loaded into the control register on DIN during the *current* frame. For example, loading '010' on DIN during conversion of IN1 configures the subsequent conversion to sample IN3. This pipelined addressing enables seamless round-robin or programmable sequencing without gaps or reconfiguration delays.

What is the power consumption of ADC084S021CIMM/NOPB in shutdown mode?

In shutdown mode (CS high), the ADC084S021CIMM/NOPB draws only 0.12 µW at 3 V or 0.35 µW at 5 V. This ultra-low quiescent draw is achieved by disabling internal clocks, bias circuits, and the track-and-hold amplifier - making it ideal for wake-on-event architectures where the ADC sleeps between periodic sensor reads.

Is the ADC084S021CIMM/NOPB compatible with standard SPI interfaces?

Yes. The ADC084S021CIMM/NOPB supports SPI, QSPI, and MICROWIRE protocols: CS acts as frame sync, SCLK controls timing, DIN accepts command data on rising edges, and DOUT outputs conversion results on falling edges - all with standard CPOL=0, CPHA=0 timing. No special host configuration is needed beyond standard SPI master setup.