Texas Instruments TLV571IPW

Overview

TLV571IPW from Texas Instruments is an 8-bit parallel analog-to-digital converter (ADC) with successive-approximation architecture, operating from a single 2.7 V to 5.5 V supply. It delivers 1.25 MSPS throughput at 5 V, supports 0 V to AVDD analog input range, features < ±0.5 LSB integral and differential nonlinearity, and integrates an internal oscillator for clock generation - used in high-speed DSP data acquisition systems.

For engineers reviewing the TLV571IPW datasheet, TLV571IPW pinout, TLV571IPW application, or TLV571IPW equivalent, this device is selected for embedded real-time signal digitization where low-power, hardware- or software-configurable sampling, and direct microprocessor/DSP interfacing are required - especially in mass storage, automotive sensor front-ends, and digital servo control loops.

Technical Context

The TLV571IPW implements a charge redistribution SAR ADC core with dual-mode sampling: hardware-triggered via CSTART (falling edge starts sampling, rising edge initiates conversion) or software-controlled via WR/RD edges. Its internal 9–22 MHz oscillator eliminates external clock dependency, while configurable control registers CR0 and CR1 enable binary/twos-complement output, internal/external clock selection, and INT/EOC mode switching.

It uses separate analog (AGND, AVDD, REFP/REFM) and digital (DGND, DVDD) supply domains with dedicated ground pins (pins 5, 8, 9), supporting precise reference management and noise isolation. The 16-clock-per-conversion timing (10 clocks for conversion + 6 for sampling) ensures deterministic latency and enables synchronization with host processors like TMS320C6x DSPs.

Key Specifications

Pinout & Package

TLV571IPW is housed in a 24-pin TSSOP (PW) package with 0.65 mm pitch, optimized for compact PCB layouts and thermal performance in industrial environments.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit parallel ADC applications.

Compared with ADS7822U and MAX1112CPE+, the TLV571IPW uniquely combines parallel interface compatibility, internal clock, hardware/software start flexibility, and dual power-down modes - making it the only option among the three that supports direct drop-in replacement in existing TMS320C6x-based data acquisition designs without signal integrity or timing revalidation.

Availability

TLV571IPW is available at Aetrix Electronics and suitable for mass storage subsystems, automotive ECU signal conditioning, digital servo feedback loops, and image sensor front-ends requiring stable component supply across extended product lifecycles.

Supply support for TLV571IPW 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 decades of expertise in precision data converters and industrial-grade ICs.

The TLV571IPW belongs to TI's legacy high-speed data acquisition product line, designed specifically for cost-optimized, low-power, parallel-interface ADC applications in DSP-centric embedded systems - emphasizing ease of integration, minimal external components, and robust operation across industrial temperature ranges.

FAQ

What is the maximum sampling rate achievable with TLV571IPW, and what conditions are required?

The TLV571IPW achieves a maximum throughput rate of 1.25 MSPS when operated at 5 V with a 20 MHz external clock or internal oscillator configured for 20 MHz. At 3 V, the maximum rate drops to 625 KSPS using a 10 MHz clock. This is due to internal timing constraints and power-supply-dependent propagation delays - confirmed in the SLAS239A datasheet Section "DSP Interface" and "Recommended Operating Conditions".

Does TLV571IPW require external reference components, or can it operate with internal references?

The TLV571IPW does not include an internal voltage reference; it requires external connections to REFP and REFM pins. However, these may be tied directly to AVDD and AGND respectively for basic operation, establishing a 0 V to AVDD full-scale range. For higher accuracy, external precision references (e.g., REF3025) can be applied - as specified in the "Reference Voltage Input" section of the datasheet.

How does the TLV571IPW handle power management during idle periods?

The TLV571IPW implements two distinct low-power states: auto power-down (≤1 mA) activates automatically 50 ns after conversion completes if no RD signal is detected, and software power-down (≤10 µA) is entered by driving CS high. Both preserve control register contents, enabling fast wake-up without reconfiguration - detailed in Table 3 ("Power Down Modes") of the SLAS239A datasheet.

Can TLV571IPW interface directly with a TMS320C6x DSP, and what hardware connections are needed?

Yes, the TLV571IPW is explicitly designed for direct interfacing with TMS320C6x DSPs. Required connections include D0–D7 data bus, CS, WR, RD, INT/EOC, and AVDD/DVDD supplies. Figure 8 of the SLAS239A datasheet shows the complete interface schematic, confirming compatibility with C6x external memory interface timing and control protocols.

What are the absolute maximum ratings for analog input voltage on TLV571IPW?

The absolute maximum analog input voltage for TLV571IPW is –0.3 V to AVDD + 0.3 V, as stated in the "Absolute Maximum Ratings" table (page 16) of SLAS239A. Exceeding this range risks permanent damage. For reliable operation, the recommended input range is strictly 0 V to AVDD - verified across all test conditions in the "Recommended Operating Conditions" section.