Texas Instruments ADS7888SDCKR

Overview

ADS7888SDCKR from Texas Instruments is an 8-bit, 1.25-MSPS successive-approximation register (SAR) analog-to-digital converter in a 6-pin SC70 package. It operates from 2.35 V to 5.25 V, delivers ±0.15 LSB INL and ±0.1 LSB DNL, achieves 49.5 dB SINAD at 100 kHz, and supports zero-latency conversion for real-time sensor monitoring in battery-powered systems.

For engineers reviewing the ADS7888SDCKR datasheet, ADS7888SDCKR pinout, ADS7888SDCKR application, or ADS7888SDCKR equivalent, this page provides verified technical context, validated pin functions, confirmed performance metrics across temperature (–40°C to 125°C), and direct alternative options for low-power, high-throughput 8-bit ADC selection in space-constrained designs.

Technical Context

The ADS7888SDCKR implements a capacitor-based SAR architecture with integrated sample-and-hold, enabling single-cycle acquisition and conversion without external components. Its serial interface uses CS (active-low chip select) and SCLK (up to 25 MHz) for glueless interfacing with microcontrollers and DSPs, with data output on SDO in MSB-first format (4 leading zeros + 8 data bits + 4 trailing zeros).

It features unipolar input range (0 V to VDD), wide input bandwidth (15 MHz at –3 dB), and digital input tolerance up to 5.25 V independent of VDD - allowing mixed-supply system integration. Power-down mode draws only 1 µA, supporting ultra-low-quiescent operation in intermittent-sampling applications.

Key Specifications

Pinout & Package

ADS7888SDCKR is packaged in a 6-pin SC70 (DCK) package measuring 2.00 mm × 1.25 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 8-bit SAR ADC applications.

Compared with ADS7868IDBVR and MAX11100ETT+, the ADS7888SDCKR uniquely balances wide supply range (2.35–5.25 V), digital overvoltage tolerance, and ultra-low power-down current - making it optimal for industrial and battery-operated systems requiring robust mixed-voltage interoperability without added components.

Availability

ADS7888SDCKR is available at Aetrix Electronics and suitable for battery-powered sensor nodes, motor current monitoring, optical network transceivers, and portable medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADS7888SDCKR 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 space-constrained, micro-power applications demanding high-speed, low-latency digitization - particularly in portable instrumentation, industrial sensing, and communications infrastructure where size, power, and reliability are critical.

FAQ

What is the maximum SCLK frequency supported by ADS7888SDCKR?

The ADS7888SDCKR supports a maximum SCLK frequency of 25 MHz across its full operating supply range (2.35 V to 5.25 V), enabling the full 1.25-MSPS throughput. Timing parameters including t_d2, t_h1, and t_wH/t_wL are guaranteed at this rate per the datasheet's Table 8.7. Exceeding 25 MHz may cause invalid conversions or timing violations.

Does ADS7888SDCKR require an external reference voltage?

No, ADS7888SDCKR does not require an external reference. It uses VDD as its internal reference, establishing a unipolar input range of 0 V to VDD. This eliminates the need for external voltage references or precision dividers, simplifying design and reducing BOM cost - confirmed in Section 9.1.1 and Electrical Characteristics tables.

What is the quiet time (t_q) requirement after ADS7888SDCKR SDO goes into 3-state?

The quiet time (t_q) for ADS7888SDCKR is 40 ns minimum - the minimum interval required between SDO entering 3-state and asserting CS low for the next conversion. Violating this timing risks invalid data or missed samples, as defined in Table 8.7 and Figure 32. This parameter is independent of VDD and applies across –40°C to 125°C.

Can ADS7888SDCKR interface directly with a 5-V microcontroller when powered from 3.3 V?

Yes, ADS7888SDCKR supports digital input overvoltage tolerance: its CS and SCLK pins accept VIH up to 5.25 V even when VDD = 3.3 V. This allows direct connection to 5-V logic without level shifters. However, SDO output swing remains referenced to VDD (3.3 V), so receiving logic must recognize 3.3 V as valid high - confirmed in Section 9.3.1 and Table 8.6.

What package type does ADS7888SDCKR use, and is it RoHS-compliant?

ADS7888SDCKR uses the SC70-6 (DCK) package, measuring 2.00 mm × 1.25 mm, and is RoHS-compliant per Texas Instruments' official packaging documentation (SLAS468A, Section 14). The "R" suffix in the part number denotes tape-and-reel packaging, and TI confirms lead-free, halogen-free construction meeting JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1).