Texas Instruments TLV1570CDW

Overview

TLV1570CDW 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 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 DSP-based image sensor processing.

For engineers reviewing the TLV1570CDW datasheet, TLV1570CDW pinout, TLV1570CDW application, or TLV1570CDW equivalent, this page delivers verified electrical specs, channel auto-scan behavior, power-down modes (10 µA software, 300 µA auto), INL/DNL < ±1 LSB, and real-world interface timing for TMS320 DSPs and microcontrollers.

Technical Context

The TLV1570CDW implements a successive-approximation register (SAR) ADC with binary-weighted capacitor array sampling, where REF– is tied to AGND and REF+ connects to the REF pin or internal reference. Conversion requires 16 SCLK cycles per sample, limiting maximum fs to fSCLK/16.

It supports two operational modes: DSP mode (FS-driven frame sync) and µC mode (FS pulled high), with independent MUX access enabling shared signal conditioning across all eight channels. Control register bits (DI15–DI0) configure channel selection, auto-scan sequence, reference source, and power-down state - applied only on the next conversion cycle.

Key Specifications

Pinout & Package

TLV1570CDW is housed in a 20-pin SOIC (DW) package rated for 0°C to 70°C operation, with separate analog (AGND, AVDD) and digital (DGND, DVDD) supply domains to minimize noise coupling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV1570CDW, ADS7822U trades speed for resolution and eliminates DSP interface features, while TLV2548IPW offers higher resolution and lower power but sacrifices throughput and FS-driven synchronization - making TLV1570CDW uniquely suited for real-time DSP-accelerated control loops.

Availability

TLV1570CDW is available at Aetrix Electronics and suitable for hard disk drive servo systems, digital motor servo loops, industrial process monitoring, and DSP-based image sensor interfaces requiring stable component supply across extended production lifecycles.

Supply support for TLV1570CDW 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 signal chain solutions.

The TLV1570CDW belongs to TI's legacy high-speed serial ADC product line, designed specifically for cost-sensitive, real-time embedded systems requiring multi-channel acquisition, low-power operation, and seamless DSP/microcontroller interfacing.

FAQ

What is the maximum sampling rate of the TLV1570CDW and what clock frequency is required?

The TLV1570CDW achieves a maximum throughput of 1.25 MSPS at 5.5 V, requiring a 20 MHz SCLK; at 2.7 V, it operates up to 625 KSPS with a 10 MHz SCLK. Each conversion consumes exactly 16 SCLK cycles, so fs = fSCLK / 16 - meaning a 16 MHz SCLK yields 1 MSPS. This fixed ratio simplifies timing budgeting in DSP or microcontroller firmware for TLV1570CDW integration.

Does the TLV1570CDW support automatic channel scanning, and how is it configured?

Yes, the TLV1570CDW supports hardware-assisted channel auto-scan via its 16-bit configuration register (CR). Setting DI10 = 1 enables auto-scan, and DI9–DI7 define the starting channel while DI9–DI8 select one of four predefined sequences (e.g., CH0→CH1→CH2→CH3 or CH7→CH6→CH5→CH4). The TLV1570CDW advances automatically after each conversion without host CPU intervention - ideal for cyclic sensor monitoring.

How does the internal reference voltage work on the TLV1570CDW, and what are its values?

The TLV1570CDW provides a programmable internal reference: DI6 = 1 selects internal mode, and DI5 chooses 2.3 V (for 3 V systems) or 3.8 V (for 5 V systems). In internal mode, the REF pin is not driven - it may be left open, and no decoupling capacitor is needed. This eliminates external reference components while maintaining accuracy, a key advantage of the TLV1570CDW in space-constrained designs.

What are the two power-down modes of the TLV1570CDW, and how do they differ?

The TLV1570CDW offers autopower-down (300 µA max) and software power-down (10 µA max). Autopower-down activates automatically 10 ns after conversion if no FS pulse arrives (DSP mode) or SCLK stops (µC mode). Software power-down is triggered by setting CR.DI15 = 1 and takes 16 SCLKs to resume - useful for deep sleep states. Both reduce system-level power, but TLV1570CDW's dual-mode flexibility supports dynamic power management in mixed-criticality applications.

Can the TLV1570CDW interface directly with SPI microcontrollers and TMS320 DSPs without additional logic?

Yes, the TLV1570CDW features a glueless serial interface compatible with both SPI microcontrollers (4-wire: CS, SCLK, SDIN, SDOUT) and TMS320 DSPs (5-wire: adds FS). In µC mode, FS is pulled high; in DSP mode, FS provides frame synchronization. No level shifters, buffers, or timing adapters are needed - the TLV1570CDW handles protocol alignment internally, simplifying hardware design and reducing BOM cost.