Texas Instruments ADS7886SDBVR

Overview

ADS7886SDBVR from Texas Instruments is a 12-bit, 1-MSPS successive-approximation register (SAR) analog-to-digital converter with integrated 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 portable instrumentation.

For engineers reviewing the ADS7886SDBVR datasheet, ADS7886SDBVR pinout, ADS7886SDBVR application, or ADS7886SDBVR 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 voltage compatibility up to 5.25 V independent of VDD, and SOT-23-6 packaging for space-constrained PCB layouts.

Technical Context

The ADS7886SDBVR implements a capacitor-based SAR architecture with inherent sampling, eliminating external sample-and-hold requirements. Conversion is initiated on the falling edge of CS, and serial data output (MSB-first) occurs synchronously with SCLK edges - 4 leading zeros followed by 12 data bits across 16 clock cycles.

It supports two functional modes: normal operation (full 1-MSPS throughput with 760–800 ns conversion time) and power-down mode (entered via CS high between 2nd and 10th SCLK falling edge), reducing supply current to 1 µA. Digital inputs tolerate up to 5.25 V regardless of VDD level, easing mixed-supply system interfacing and relaxing power-up sequencing constraints.

Key Specifications

Pinout & Package

The ADS7886SDBVR is housed in a 6-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7887SDBVR and ADS8860IDRCT, the ADS7886SDBVR uniquely balances 12-bit precision, ultra-low 3.9-mW active power, SOT-23-6 size, and 5.25-V-tolerant digital inputs - making it optimal for space- and energy-constrained 12-bit measurement systems where mixed-voltage interfacing is required.

Availability

ADS7886SDBVR is available at Aetrix Electronics and suitable for motor current sensing, optical sensor interface, battery-powered instrumentation, medical sensor front-end, and high-speed closed-loop systems requiring stable component supply and long-term production continuity.

Supply support for ADS7886SDBVR 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 company specializing in analog and embedded processing technologies, with leadership in precision data converters and low-power signal chain solutions.

The ADS7886 belongs to TI's micro-power miniature SAR ADC family, designed specifically for space-constrained, battery-operated, and high-SNR measurement applications demanding 12-bit accuracy at 1-MSPS without external sample-and-hold circuitry.

FAQ

What is the absolute maximum supply voltage for ADS7886SDBVR?

The absolute maximum supply voltage (VDD) for ADS7886SDBVR is 7 V, as specified in the Absolute Maximum Ratings table. However, the recommended operating range is strictly 2.35 V to 5.25 V. Exceeding 5.25 V during normal operation risks violating electrical specifications and may cause permanent damage, even if below the 7-V absolute limit.

Does ADS7886SDBVR require an external reference voltage?

No, ADS7886SDBVR does not require an external reference voltage. Its reference is derived internally from VDD, resulting in a unipolar input range of 0 V to VDD. This eliminates external reference components and simplifies layout, though decoupling (1 µF + 10 nF) at VDD is mandatory for specified AC performance.

How does the power-down mode function in ADS7886SDBVR?

ADS7886SDBVR enters power-down mode when CS is pulled high between the 2nd and 10th falling edge of SCLK. In this state, supply current drops to 1 µA. Recovery requires a dummy conversion cycle (CS low for >10 SCLK edges), after which full functionality resumes within 1 µs - enabling rapid wake-up in duty-cycled systems.

What is the meaning of "zero latency" for ADS7886SDBVR?

"Zero latency" in ADS7886SDBVR means the conversion result corresponds to the analog input sampled precisely at the falling edge of CS - with no pipeline or buffer delay. The first data bit appears on SDO after only 3 SCLK edges, and the full 12-bit word is available within 800 ns, enabling tight real-time control loop timing.

Can ADS7886SDBVR interface directly with a 5-V microcontroller while powered from 3.3 V?

Yes, ADS7886SDBVR supports digital input voltages up to 5.25 V regardless of VDD level. When powered from 3.3 V, its CS and SCLK pins accept 5-V logic signals without level shifters - simplifying interface design in mixed-supply systems and relaxing power-up sequencing constraints.