Texas Instruments ADC084S101CIMM

Overview

ADC084S101 from Texas Instruments is a low-power, 4-channel, 8-bit successive-approximation ADC with serial SPI-compatible interface, operating at 500 ksps to 1 Msps sample rates over −40°C to +85°C. It features ±0.13 LSB typical INL, 49.6 dB typical SNR, and single-supply operation from 2.7V to 5.25V - used in portable instrumentation for multi-sensor analog signal digitization.

For engineers reviewing the ADC084S101 datasheet, ADC084S101 pinout, ADC084S101 application, or ADC084S101 equivalent, key selection considerations include its guaranteed 8-bit no-missing-codes performance across full sample-rate range, channel-to-channel crosstalk of −73 dB at 5.25V, and power-down consumption as low as 0.12 µW at 3V - critical for battery-powered remote sensing and embedded control systems.

Technical Context

The ADC084S101 employs a charge-redistribution DAC architecture with internal track-and-hold, enabling precise sampling during first 3 SCLK cycles after CS assertion and conversion/readout over next 13 cycles. Its straight-binary output is compatible with SPI, QSPI, and MICROWIRE interfaces, supporting MSB-first serial data transfer on DOUT synchronized to SCLK falling edges.

It uses VA as both supply and reference, requiring tight decoupling (1 µF + 0.1 µF) within 1 cm of the pin. Input channels IN1–IN4 are multiplexed via 3-bit control register loaded on DIN during each frame, with acquisition time of 3 SCLK cycles and total throughput time of 16 SCLK periods at up to 16 MHz clock frequency.

Key Specifications

Pinout & Package

ADC084S101 is housed in a 10-lead VSSOP (DGS) package with 0.5 mm lead pitch, optimized for compact PCB layouts and thermal performance (θ_JA = 190°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADC084S051 and ADC104S101, the ADC084S101 uniquely balances 8-bit fidelity, 1 Msps throughput, and ultra-low 3.2 mW active power - making it optimal for portable systems needing speed and efficiency without resolution overkill.

Availability

ADC084S101 is available at Aetrix Electronics and suitable for portable systems, remote data acquisition, instrumentation and control systems requiring stable component supply and long-term industrial lifecycle support.

Supply support for ADC084S101 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 delivering analog and embedded processing solutions with emphasis on reliability, precision, and energy efficiency.

The ADC084S101 belongs to TI's precision SAR ADC product line, designed specifically for space-constrained, battery-sensitive applications requiring multi-channel digitization without sacrificing speed or linearity.

FAQ

What is the maximum clock frequency supported by the ADC084S101?

The ADC084S101 supports a maximum SCLK frequency of 16 MHz, with guaranteed AC performance across 50 kHz to 16 MHz. At 16 MHz, the device achieves its full 1 Msps sample rate while maintaining specified SNR (49.6 dB typ), THD (−75 dB), and timing margins including tCH/tCL ≥ 0.3 × tSCLK. Operation outside this range may compromise conversion accuracy or timing compliance.

Does the ADC084S101 require an external reference voltage?

No, the ADC084S101 uses its VA supply pin as the internal reference - LSB = VA/256 - eliminating need for external reference components. This simplifies BOM and layout but requires clean, well-decoupled VA (1 µF + 0.1 µF capacitors within 1 cm) to maintain 49.6 dB SNR and prevent supply-induced gain error. Reference noise directly impacts ENOB.

How does channel selection work on the ADC084S101?

Channel selection is controlled via a 3-bit address (ADD2:ADD0) loaded into the ADC084S101's control register on DIN during each serial frame. The mapping is: 000 → IN1 (default), 001 → IN2, 010 → IN3, 011 → IN4. Bits 7–6 and 2–0 are don't-care. Address for the *next* conversion is clocked in during the current frame's first 8 SCLK rising edges.

What is the power-down behavior of the ADC084S101?

When CS is held high, the ADC084S101 enters shutdown mode, reducing supply current to 200 nA (typ) and power consumption to 0.12 µW at 3V. DOUT goes high-impedance, internal clock is gated off, and analog circuitry is disabled. Conversion resumes on the next CS falling edge with no wake-up delay - the first result corresponds to IN1.

Is the ADC084S101 pin-compatible with other members of the ADC084Sxx family?

Yes, the ADC084S101 is fully pin- and function-compatible with ADC084S021 (50–200 ksps) and ADC084S051 (200–500 ksps), sharing identical 10-pin VSSOP (DGS) footprint, pin assignments, control register format, and serial interface protocol - enabling drop-in upgrades or downgrades based on throughput requirements without PCB revision.