Texas Instruments TLV1570IDW

Overview

TLV1570IDW 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-input MUX, programmable internal reference (2.3 V or 3.8 V), SAR architecture, and SPI/QSPI-compatible 4-/5-wire serial interface - used in automotive sensor acquisition and digital servo control.

For engineers reviewing the TLV1570IDW datasheet, TLV1570IDW pinout, TLV1570IDW application, or TLV1570IDW equivalent, this page delivers verified electrical specs, validated pin functions, confirmed operating modes (DSP/µC), real-world power-down behavior (10 µA software, 300 µA auto), and precise channel auto-scan sequencing logic per TI SLAS169B Rev. October 2000.

Technical Context

The TLV1570IDW implements a successive-approximation register (SAR) ADC using binary-weighted capacitor switching with REF– tied to AGND and REF+ driven by internal or external reference. Conversion requires 16 SCLK cycles per sample, limiting maximum sampling frequency to f_SCLK/16.

It supports two operational modes: DSP mode (FS-driven frame sync) and microcontroller mode (FS = high), with distinct power-down recovery timing - 1 SCLK for autopower-down, 16 SCLKs for software power-down. Channel selection is controlled via a 16-bit configuration register written to SDIN, enabling channel auto-scan, internal reference selection (DI6/DI5), and power management (DI15/DI4).

Key Specifications

Pinout & Package

TLV1570IDW is housed in a 20-pin SOIC (DW) package rated for –40°C to +85°C operation. Pin functions are electrically validated per TI SLAS169B and match the top-view DW package diagram.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822U and TLV2548IPW, the TLV1570IDW uniquely combines 1.25 MSPS throughput, dual-voltage internal reference, hardware auto-scan, and glueless DSP interface - making it optimal for high-speed embedded control where timing determinism and minimal host overhead are critical.

Availability

TLV1570IDW is available at Aetrix Electronics and suitable for automotive sensor acquisition, digital servo control, process monitoring, and image sensor digitization requiring stable component supply across extended temperature ranges.

Supply support for TLV1570IDW 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 TLV1570IDW belongs to TI's legacy high-speed serial ADC product line, designed specifically for resource-constrained embedded systems needing multi-channel digitization, low-power operation, and direct interfacing to DSPs and SPI microcontrollers.

FAQ

What is the maximum sampling rate of the TLV1570IDW and what clock frequency is required?

The TLV1570IDW achieves a maximum sampling rate of 1.25 MSPS at 5 V, requiring a 20 MHz SCLK; at 3 V, its maximum rate drops to 625 KSPS with a 10 MHz SCLK. Each conversion consumes exactly 16 SCLK cycles, so fs = f_SCLK/16. This fixed ratio means timing is deterministic and easily synchronized with host processors - a key advantage in real-time control loops using the TLV1570IDW.

How does the TLV1570IDW handle channel selection and auto-scan functionality?

The TLV1570IDW uses a 16-bit configuration register written via SDIN to control channel selection: DI10 enables auto-scan, while DI9–DI7 define the starting channel (if disabled) or DI8–DI7 set the sweep pattern (if enabled). Auto-scan sequences include CH0–CH7, odd/even subsets, or reverse order - all executed autonomously by the TLV1570IDW without host CPU involvement during conversion cycles.

Can the TLV1570IDW operate with a single supply, and how are AVDD and DVDD related?

Yes, the TLV1570IDW operates from a single 2.7–5.5 V source applied to both AVDD and DVDD, but TI specifies |AVDD − DVDD| < 0.5 V for reliable operation. Although separate pins exist, they are intended for independent analog/digital supply routing - not dual-voltage operation. Proper PCB layout requires shorting AGND and DGND under the TLV1570IDW package to minimize ground bounce and maintain 10-bit accuracy.

What are the power-down modes supported by the TLV1570IDW and how do they differ?

The TLV1570IDW supports two distinct power-down modes: autopower-down (enabled via DI4) automatically enters 300 µA state 10 ns after conversion completes, recovering on next FS or SCLK; software power-down (DI15 = 1) forces 10 µA state with 16-SCLK recovery latency. Both modes preserve no register state - the TLV1570IDW requires full reconfiguration after wake-up, ensuring predictable initialization in safety-critical applications.

Is the TLV1570IDW compatible with modern microcontrollers that support SPI?

Yes, the TLV1570IDW is fully SPI-compatible in 4-wire mode (CS, SCLK, SDIN, SDOUT) with FS held high, supporting standard SPI clock polarity and phase configurations. Its 16-cycle frame, MSB-first data format, and lack of mandatory dummy cycles allow seamless integration with ARM Cortex-M, PIC, and ESP32 microcontrollers - confirmed by TI's application notes and verified in production designs using the TLV1570IDW.