Texas Instruments ADS7887SDCKR

Overview

ADS7887SDCKR from Texas Instruments is a 10-bit, 1.25-MSPS successive approximation register (SAR) analog-to-digital converter in a 6-pin SC70 package. It features zero latency, unipolar input range (0 V to VDD), ±0.35 LSB INL, 61 dB SINAD at 100 kHz, and operates from 2.35 V to 5.25 V supply. It is used in high-speed closed-loop systems requiring precise, low-power digitization of sensor signals.

For engineers reviewing the ADS7887SDCKR datasheet, ADS7887SDCKR pinout, ADS7887SDCKR application, or ADS7887SDCKR equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, application-specific implementation insights, and two confirmed alternative parts with documented functional and application-level differences.

Technical Context

The ADS7887SDCKR implements a capacitor-based SAR architecture with integrated sample-and-hold, enabling true zero-latency conversion. Its serial interface uses CS (active-low chip select) and SCLK (up to 25 MHz) for glueless interfacing with microcontrollers and DSPs, with sampling triggered on the falling edge of CS.

It supports wide-supply operation (2.35–5.25 V), delivers 3.8 mW typical power dissipation at 3 V/1.25 MSPS, and includes a power-down mode drawing only 1 µA. Digital inputs tolerate up to 5.25 V regardless of VDD - a key feature for mixed-voltage system interfacing.

Key Specifications

Pinout & Package

The ADS7887SDCKR is housed in a 6-pin SC70 package (2.00 mm × 1.25 mm body size), optimized for space-constrained PCB layouts in portable and embedded systems.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog-to-digital conversion applications.

Compared with ADS7886IDBVR and ADS7867IDBVR, the ADS7887SDCKR uniquely supports 5.25-V-tolerant digital inputs and full 2.35–5.25 V operation - making it the only option among the three suitable for mixed-supply industrial or automotive subsystems without level shifters.

Availability

ADS7887SDCKR is available at Aetrix Electronics and suitable for motor control, optical monitoring, battery-powered medical sensors, and high-speed closed-loop systems requiring stable component supply, long-term manufacturability, and guaranteed traceable sourcing.

Supply support for ADS7887SDCKR 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 ICs.

The ADS7887SDCKR belongs to TI's ADS788x family of miniature, micro-power SAR ADCs - designed specifically for space- and energy-constrained applications demanding high-speed, high-accuracy digitization without external references or support circuitry.

FAQ

What is the maximum SCLK frequency supported by the ADS7887SDCKR?

The ADS7887SDCKR supports a maximum SCLK frequency of 25 MHz across its full operating temperature range (–40°C to 125°C) and supply range (2.35 V to 5.25 V). At this clock rate, the device achieves its rated 1.25-MSPS throughput with a conversion time of 560 ns (typical). This timing is validated per TI's SLAS468A datasheet Section 8.7.

Does the ADS7887SDCKR require an external voltage reference?

No, the ADS7887SDCKR does not require an external voltage reference. It uses its VDD supply as the internal reference, establishing a unipolar input range of 0 V to VDD. This eliminates the need for external reference ICs or precision resistors, reducing BOM cost and layout complexity - a key advantage confirmed in the device description and electrical characteristics tables of the ADS7887SDCKR datasheet.

What is the purpose of the 4 leading and 2 trailing zeros in the ADS7887SDCKR serial output format?

The ADS7887SDCKR outputs 16 bits per frame: 4 leading zeros, followed by the 10-bit MSB-first result, then 2 trailing zeros. This fixed 16-bit framing simplifies interface timing with microcontrollers and DSPs - the host can reliably capture the 10-bit data using a consistent 16-clock window without needing dynamic bit-length detection. This behavior is explicitly defined in Figure 32 and Section 9.3.1 of the ADS7887SDCKR datasheet.

How does the ADS7887SDCKR handle power-up sequencing when interfaced with higher-voltage digital logic?

The ADS7887SDCKR allows digital inputs (CS, SCLK) to swing up to 5.25 V independently of VDD - meaning it can safely interface with 5-V logic even when powered from 2.35 V. This relaxes strict power-up sequencing requirements and eliminates the need for external level translators in mixed-voltage systems, as stated in the "Description" and "Feature Description" sections of the ADS7887SDCKR datasheet.

Is the ADS7887SDCKR pin-compatible with the ADS7888SDCKR?

Yes, the ADS7887SDCKR and ADS7888SDCKR share identical SC70-6 packaging, pinout, and interface timing. They differ only in resolution (10-bit vs. 8-bit), performance specs (INL, SINAD, THD), and internal conversion logic - allowing drop-in replacement in designs where 8-bit accuracy suffices and lower cost or reduced data bandwidth is acceptable.