Texas Instruments TLV1570CDWR

Overview

TLV1570CDWR 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 high-speed DSP data acquisition for automotive sensor monitoring and process control systems.

For engineers reviewing the TLV1570CDWR datasheet, TLV1570CDWR pinout, TLV1570CDWR application, or TLV1570CDWR equivalent, key selection criteria include its channel auto-scan capability, differential nonlinearity < ±1 LSB, software- and auto-power-down modes (10 µA / 300 µA), and direct glueless interfacing to TMS320 DSPs and SPI microcontrollers.

Technical Context

The TLV1570CDWR implements a successive-approximation register (SAR) ADC architecture with binary-weighted capacitor DAC and CMOS threshold detector, sampling analog inputs via internal charge redistribution. Its 8-channel MUX is independently accessible, enabling shared signal conditioning (e.g., antialiasing filters) across all channels before digitization.

It supports two operational modes: DSP mode (5-wire interface with FS frame sync) and microcontroller mode (4-wire, FS pulled high), both using SCLK-synchronized serial transfers requiring 16 clock cycles per conversion. Internal reference selection (DI6/DI5 bits) and channel auto-scan (DI10) are configured via a 16-bit control register written to SDIN.

Key Specifications

Pinout & Package

TLV1570CDWR is housed in a 20-pin SOIC (Small Outline Integrated Circuit) package (DW suffix), rated for 0°C to 70°C operation. The package features gull-wing leads, 0.65 mm pitch, and JEDEC MS-013AC compliance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV1570CDWR, ADS7822U trades 2.5× lower throughput for 2-bit higher resolution and simpler SPI timing, while TLV2548IPW offers 12-bit accuracy but lacks integrated auto-scan and frame-sync - making TLV1570CDWR uniquely suited for deterministic, low-overhead DSP-coupled acquisition.

Availability

TLV1570CDWR is available at Aetrix Electronics and suitable for automotive sensor monitoring, digital servo control, process control loop acquisition, and hard disk drive read channel applications requiring stable component supply across extended production lifecycles.

Supply support for TLV1570CDWR 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 TLV1570CDWR belongs to TI's legacy high-speed serial ADC product line, designed specifically for cost-sensitive, space-constrained industrial and automotive systems needing multi-channel digitization with minimal external components.

FAQ

What is the maximum sampling rate of the TLV1570CDWR and under what conditions?

The TLV1570CDWR achieves a maximum throughput rate of 1.25 MSPS when operated at 5 V with a 20 MHz SCLK. At 3 V, the maximum rate drops to 625 KSPS with a 10 MHz SCLK. This performance assumes proper decoupling, stable reference, and adherence to timing specifications including minimum SCLK high/low pulse widths.

Does the TLV1570CDWR support automatic channel scanning, and how is it configured?

Yes, the TLV1570CDWR supports hardware auto-scan via the DI10 bit in its 16-bit control register. When enabled, it sequentially samples CH0–CH7 (or user-defined subsets like CH1/CH3/CH5/CH7) without host intervention. Configuration is performed by writing the appropriate value to SDIN - for example, 0400h initiates auto-scan from CH0.

How does the internal reference voltage work on the TLV1570CDWR, and what are the available options?

The TLV1570CDWR provides an internal reference selectable via DI6/DI5 bits: 2.3 V for 3 V operation or 3.8 V for 5 V operation. In internal mode, the REF pin is unused and may be left floating; external decoupling is unnecessary. This eliminates the need for external reference ICs and associated passive components in many designs.

What are the power-down modes supported by the TLV1570CDWR, and how do they differ?

The TLV1570CDWR supports two distinct power-down modes: autopower-down (300 µA max, triggered automatically after conversion) and software power-down (10 µA max, activated by setting DI15). Autopower-down resumes in 1 SCLK cycle; software power-down requires 16 SCLK cycles to recover - enabling flexible trade-offs between wake-up latency and ultra-low quiescent current.

Can the TLV1570CDWR interface directly with a TMS320 DSP, and what pins are required?

Yes, the TLV1570CDWR interfaces directly with TMS320 DSPs using five dedicated lines: CS, SCLK, SDIN, SDOUT, and FS. The FS signal synchronizes frame boundaries, and no level-shifting or glue logic is needed. This 5-wire DSP mode is electrically and timing-compatible with TI's C5000/C6000 series serial ports.