Texas Instruments TLV1570CPWR

Overview

TLV1570CPWR from Texas Instruments is a 10-bit, 8-channel serial analog-to-digital converter (ADC) with 1.25 MSPS throughput at 5 V and 625 KSPS at 3 V, operating from a single 2.7–5.5 V supply. It integrates an on-chip 8:1 analog multiplexer, internal reference (2.3 V or 3.8 V), SAR architecture, and SPI/QSPI-compatible 4-/5-wire serial interface - used in hard disk drive servo control and automotive sensor acquisition.

For engineers reviewing the TLV1570CPWR datasheet, TLV1570CPWR pinout, TLV1570CPWR application, or TLV1570CPWR equivalent, this page delivers verified electrical specs, real-world timing behavior, channel auto-scan configuration, power-down recovery timing, and validated alternative ADCs for multi-channel DSP data acquisition systems.

Technical Context

The TLV1570CPWR implements a successive-approximation register (SAR) ADC with binary-weighted capacitor array and CMOS threshold detector; conversion requires exactly 16 SCLK cycles per sample, limiting maximum sampling rate to f_SCLK/16. Its MUX output (MO) is independently accessible, enabling shared signal conditioning (e.g., anti-aliasing filter) across all eight channels before digitization.

It supports two operational modes: DSP mode (FS-driven frame sync) and microcontroller mode (FS = high), with distinct power-down recovery paths - autopower-down resumes in 1 SCLK, while software power-down requires 16 SCLKs. Internal reference selection (DI5/DI6) and channel auto-scan sequence (DI9–DI7, DI10) are fully programmable via 16-bit serial control register written to SDIN.

Key Specifications

Pinout & Package

TSSOP-20 (PW) package: 6.5 mm × 4.4 mm, 0.65 mm pitch, surface-mount, moisture-sensitive level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-channel, 10-bit serial ADC applications.

Compared with TLV1570CPWR, ADS7822U trades speed and DSP integration for resolution, while MAX11131ETE+ offers higher bit depth in a smaller footprint but sacrifices supply flexibility and frame-sync capability - TLV1570CPWR remains optimal for 1.25 MSPS, 8-channel, DSP-coupled acquisition with programmable auto-scan.

Availability

TLV1570CPWR is available at Aetrix Electronics and suitable for hard disk drive servo control, automotive ECU sensor acquisition, and industrial process monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLV1570CPWR 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 over 50 years of innovation in precision data converters and signal chain solutions.

The TLV1570CPWR belongs to TI's legacy high-speed serial ADC product line, designed specifically for multi-channel, DSP-coupled data acquisition in cost-sensitive, thermally constrained applications like storage and automotive subsystems.

FAQ

What is the maximum sampling frequency achievable with TLV1570CPWR?

The TLV1570CPWR achieves up to 1.25 MSPS at 5 V and 625 KSPS at 3 V. This is determined by its fixed 16-SCLK-per-conversion timing: maximum sampling frequency equals f_SCLK/16. Thus, a 20 MHz SCLK yields 1.25 MSPS, while a 10 MHz SCLK yields 625 KSPS. The device does not support oversampling or decimation modes - throughput is strictly clock-limited.

Does TLV1570CPWR support true differential input channels?

No, the TLV1570CPWR accepts only single-ended analog inputs on CH0–CH7 and AIN. Its internal SAR architecture uses a pseudo-differential structure (REF+ and REF−, where REF− is tied to AGND), but it lacks dedicated differential input pairs or programmable input polarity. For differential signal acquisition, external instrumentation amplifiers must be used ahead of the MUX or AIN.

How does the TLV1570CPWR channel auto-scan function work in practice?

The TLV1570CPWR auto-scan is configured via control register bits DI10 (enable), DI9–DI7 (base channel), and DI8–DI7 (sequence pattern). When enabled, it cycles through up to eight channels without host intervention - e.g., writing 0400h repeatedly samples CH0→CH1→CH2…CH7 sequentially. Sequence reset (DI7 = 1) restarts from the base channel, and changing DI8–DI7 mid-sequence switches patterns without requiring another reset.

Can TLV1570CPWR operate with separate analog and digital ground planes?

Yes - and it is strongly recommended. The TLV1570CPWR has separate AGND (Pin 14) and DGND (Pin 7) pins. TI's layout guidance specifies shorting them together *immediately outside the package* using a low-impedance trace, while maintaining isolated analog and digital ground planes on the PCB. This minimizes noise coupling from digital switching into the sensitive analog input path and reference circuitry.

What happens to the TLV1570CPWR's output during software power-down?

When software power-down is activated (CR.DI15 = 1), the TLV1570CPWR enters a 10 µA standby state: the ADC core, reference, and clock buffer are disabled, SDOUT goes high-impedance, and no conversion results are generated. Recovery requires 16 SCLK cycles before valid data appears on SDOUT - unlike autopower-down, which resumes in 1 SCLK. During this 16-cycle window, the device ignores SDIN writes and FS edges.