Texas Instruments ADS7886SBDCKR

Overview

ADS7886SBDCKR from Texas Instruments is a 12-bit, 1-MSPS successive-approximation register (SAR) analog-to-digital converter with inherent sample-and-hold, unipolar 0 V to VDD input range, 20-MHz serial interface, and 1 µA power-down current. It operates from 2.35 V to 5.25 V and delivers 72.25-dB SINAD at 100 kHz for high-fidelity signal acquisition in battery-powered sensor interfaces.

For engineers reviewing the ADS7886SBDCKR datasheet, ADS7886SBDCKR pinout, ADS7886SBDCKR application, or ADS7886SBDCKR equivalent, key selection criteria include guaranteed 12-bit no-missing-codes performance, zero-latency conversion timing, wide supply voltage tolerance (2.35–5.25 V), digital input compatibility up to 5.25 V independent of VDD, and SC70-6 package suitability for space-constrained PCB layouts.

Technical Context

The ADS7886SBDCKR implements a capacitor-based SAR architecture with integrated sampling circuitry, enabling true zero-latency operation where conversion begins on the falling edge of CS. Its serial interface uses CS and SCLK for glueless microprocessor/DSP interfacing, outputting 12-bit MSB-first data preceded by four leading zeros over 16 clock cycles.

It supports two functional modes: normal conversion (initiated by CS falling edge, completed in 800 ns at 20 MHz SCLK) and power-down mode (entered when CS goes high between the 2nd and 10th SCLK falling edges). Digital inputs tolerate up to 5.25 V regardless of VDD level, relaxing power-up sequencing constraints and enabling mixed-voltage system integration.

Key Specifications

Pinout & Package

The ADS7886SBDCKR is packaged in a 6-pin SC70 (DCK) package measuring 2.00 mm × 1.25 mm, optimized for ultra-compact PCB layouts in portable and space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit SAR ADC applications.

Compared with ADS7886SBDCKR, ADS7887SBDCKR trades 2 bits of resolution for lower cost and power, while ADS8860IDRCT provides 4 extra bits at the expense of supply inflexibility and larger footprint-making ADS7886SBDCKR optimal for 12-bit, wide-supply, space-constrained designs requiring balanced speed, precision, and efficiency.

Availability

ADS7886SBDCKR is available at Aetrix Electronics and suitable for motor current sensing, optical sensor interfaces, battery-powered data acquisition, medical instrumentation, and high-speed closed-loop systems requiring stable component supply across automotive, industrial, and portable electronics programs.

Supply support for ADS7886SBDCKR 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 low-power design.

The ADS7886SBDCKR belongs to TI's micro-power miniature SAR ADC family, engineered for high-speed, low-power, space-constrained applications including portable instrumentation, optical networking, and motor control where 12-bit accuracy and 1-MSPS throughput are essential.

FAQ

What is the maximum sample rate supported by the ADS7886SBDCKR?

The ADS7886SBDCKR supports a maximum throughput rate of 1 MSPS, achieved with a 20-MHz SCLK. Conversion time is specified at 760–800 ns under these conditions, and the device maintains full 12-bit performance-including guaranteed no-missing-codes and ±1.25 LSB INL-across its entire operating temperature range (–40°C to 125°C). This rate is sustained without performance degradation in both 2.35–3.6 V and 4.75–5.25 V supply configurations.

Does the ADS7886SBDCKR require an external reference voltage?

No, the ADS7886SBDCKR does not require an external reference voltage. Its reference is derived internally from the VDD supply, establishing a unipolar input range of 0 V to VDD. This eliminates external reference components and simplifies layout-though VDD must be well-decoupled (1 µF + 10 nF) and low-noise to maintain specified SINAD and THD performance. The device's internal reference tracking ensures consistent full-scale scaling across the 2.35–5.25 V supply range.

How does the power-down mode function on the ADS7886SBDCKR?

The ADS7886SBDCKR enters power-down mode when CS is pulled high between the 2nd and 10th falling edges of SCLK after conversion initiation. In this state, supply current drops to 1 µA, and SDO transitions to high-impedance. Recovery requires a dummy CS low pulse lasting >10 SCLK cycles, followed by a 1 µs wake-up time before valid conversion resumes. This mode is ideal for duty-cycled sensing in battery-powered systems where average power must be minimized between acquisitions.

Can the ADS7886SBDCKR interface directly with a 5-V microcontroller while operating from a 3-V supply?

Yes, the ADS7886SBDCKR supports mixed-voltage operation: its digital inputs (CS, SCLK) accept voltages up to 5.25 V even when VDD is as low as 2.35 V. This allows direct connection to 5-V logic without level shifters. However, digital output levels (SDO) are referenced to VDD-so when VDD = 3 V, VOH ≈ 2.8 V and VOL ≈ 0.4 V-which remains compatible with standard 3.3-V CMOS inputs but may require verification against the host controller's VIH/VIL thresholds.

What package type is used for the ADS7886SBDCKR, and what are its dimensions?

The ADS7886SBDCKR uses the SC70-6 (DCK) package, a surface-mount, 6-pin miniature plastic package measuring 2.00 mm × 1.25 mm with a typical height of 0.9 mm. This compact footprint is ideal for space-constrained applications such as wearable sensors, optical modules, and portable test equipment. Thermal resistance is characterized at RθJA = 149.6 °C/W, and the device is rated for operation from –40°C to 125°C ambient temperature.