Texas Instruments ADS7888SDBVR

Overview

ADS7888SDBVR from Texas Instruments is an 8-bit, 1.25-MSPS successive-approximation register (SAR) analog-to-digital converter with zero latency, unipolar 0 V to VDD input range, and 25-MHz serial interface. It operates from 2.35 V to 5.25 V, consumes only 3.8 mW at 3 V/1.25 MSPS, and features ±0.15 LSB INL and 49.5 dB SINAD - optimized for battery-powered sensor acquisition in compact industrial and medical systems.

For engineers reviewing the ADS7888SDBVR datasheet, ADS7888SDBVR pinout, ADS7888SDBVR application, or ADS7888SDBVR equivalent, this page delivers verified electrical specs, functional block context, SOT-23 package details, real-world use cases in motor sensing and optical networks, and two validated alternative parts with documented performance trade-offs.

Technical Context

The ADS7888SDBVR implements a capacitor-based SAR architecture with integrated sample-and-hold, where conversion is triggered by the falling edge of CS and data is clocked out MSB-first via SDO synchronized to SCLK. Its internal reference is derived directly from VDD, eliminating external reference components.

It supports glueless interfacing with microcontrollers and DSPs using a 3-wire SPI-compatible protocol (CS, SCLK, SDO), with power-down current as low as 1 µA and digital inputs tolerant up to 5.25 V regardless of VDD - enabling mixed-supply system integration without level shifters.

Key Specifications

Pinout & Package

ADS7888SDBVR is packaged in a 6-pin SOT-23 (DBV) with body size 2.90 mm × 1.60 mm, rated for –40°C to +125°C operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ADC applications.

Compared with ADS7888SDBVR, ADS7886IDBVR offers higher resolution at lower supply voltages but lacks 5 V compatibility, while ADS7868IDBVR reduces size and power but sacrifices 0.25 MSPS throughput and 5 V support - making ADS7888SDBVR optimal for 5 V–compatible, medium-speed, cost-sensitive industrial sensing.

Availability

ADS7888SDBVR is available at Aetrix Electronics and suitable for motor current sensing, optical network monitoring, battery-powered medical sensors, and industrial bus voltage monitoring requiring stable component supply across automotive-grade temperature ranges.

Supply support for ADS7888SDBVR 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 and embedded processing technologies, with decades of expertise in precision data converters and low-power design.

The ADS788x family was engineered for micro-power, miniature SAR ADC applications in space- and energy-constrained systems - emphasizing simplicity (no external reference), robustness (wide supply, mixed-voltage I/O), and fast time-to-market integration.

FAQ

What is the maximum clock frequency supported by ADS7888SDBVR?

The ADS7888SDBVR supports a maximum SCLK frequency of 25 MHz, enabling its full 1.25-MSPS throughput rate. At this clock speed, conversion time is 450–480 ns, and the device outputs a 12-bit frame (4 leading zeros + 8 data bits + 4 trailing zeros) synchronously on each SCLK falling edge. Exceeding 25 MHz violates timing specifications and may cause data corruption.

Does ADS7888SDBVR require an external voltage reference?

No, ADS7888SDBVR does not require an external voltage reference. It uses its VDD supply as the internal reference, resulting in a unipolar input range of 0 V to VDD. This simplifies system design and reduces BOM count, though accuracy is directly dependent on VDD stability and noise - decoupling with 1 µF + 10 nF capacitors is mandatory per the datasheet.

What is the power consumption of ADS7888SDBVR in power-down mode?

In power-down mode with SCLK disabled, ADS7888SDBVR draws only 1 µA typical supply current. When SCLK remains active at 25 MHz during power-down, current increases to 200 µA. The device enters power-down automatically after CS remains high for >100 ns following the 16th SCLK edge, and exits in <0.8 µs upon next CS assertion.

Can ADS7888SDBVR interface directly with a 5 V microcontroller while operating from a 3 V supply?

Yes, ADS7888SDBVR supports mixed-voltage operation: its digital inputs (CS, SCLK) tolerate up to 5.25 V regardless of VDD, so a 5 V MCU can drive them directly even when ADS7888SDBVR is powered from 3 V. However, its SDO output swings from 0 V to VDD (i.e., 0–3 V), requiring level translation if the MCU expects 5 V logic levels on input.

What package type is used for ADS7888SDBVR, and what are its thermal characteristics?

ADS7888SDBVR uses the SOT-23-6 (DBV) package with nominal dimensions of 2.90 mm × 1.60 mm. Its junction-to-ambient thermal resistance (RθJA) is 114.9°C/W. Under 1.25 MSPS operation at 3 V, it dissipates 3.8 mW - generating negligible self-heating (<0.5°C rise) in typical PCB layouts with moderate copper area.