Texas Instruments TLV1570IPWRG4

Overview

TLV1570IPWRG4 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, 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 feedback loops where multi-channel sampling and low-power operation are critical.

For engineers reviewing the TLV1570IPWRG4 datasheet, TLV1570IPWRG4 pinout, TLV1570IPWRG4 application, or TLV1570IPWRG4 equivalent, key selection criteria include its 10-bit resolution with <±1 LSB INL/DNL, autopower-down (300 µA) and software power-down (10 µA) modes, channel auto-scan capability, and direct interfacing to TMS320 DSPs without glue logic.

Technical Context

The TLV1570IPWRG4 employs a successive-approximation register (SAR) ADC architecture with binary-weighted capacitor DAC and CMOS threshold detector. Conversion requires 16 SCLK cycles per sample, supporting maximum sampling rates of 1.25 MSPS (at 20 MHz SCLK, 5 V) or 625 KSPS (at 10 MHz SCLK, 3 V).

It features dual power-down modes: autopower-down activates 10 ns after conversion completion (300 µA max), while software power-down enters via control register bit DI15 (10 µA max, 16-SCLK recovery). The on-chip MUX output (MO) allows external signal conditioning shared across all eight channels (CH0–CH7), and the REF pin supports both internal (2.3 V/3.8 V selectable) and external reference configurations.

Key Specifications

Pinout & Package

TLV1570IPWRG4 is housed in a 20-pin TSSOP (PW) package rated for –40°C to +85°C operation. The package footprint measures 6.5 mm × 4.4 mm with 0.65 mm lead pitch and exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV1570IPWRG4, ADS7822U trades speed and integrated reference for higher resolution, while TLV2548IPW offers 12-bit accuracy at lower throughput and simplified interface-neither matches TLV1570IPWRG4's combination of 1.25 MSPS, programmable reference, and DSP-native frame sync.

Availability

TLV1570IPWRG4 is available at Aetrix Electronics and suitable for automotive sensor acquisition, digital servo feedback, and process control I/O modules requiring stable component supply across extended temperature ranges.

Supply support for TLV1570IPWRG4 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 ADC innovation.

The TLV1570IPWRG4 belongs to TI's precision data acquisition product line, designed specifically for high-speed, low-power, multi-channel analog sensing in automotive, industrial, and DSP-centric embedded systems.

FAQ

What is the maximum sampling rate of the TLV1570IPWRG4 and what clock frequency is required?

The TLV1570IPWRG4 achieves a maximum sampling rate of 1.25 MSPS when operated at 5 V with a 20 MHz SCLK, or 625 KSPS at 3 V with a 10 MHz SCLK. Each conversion requires exactly 16 SCLK cycles, so fs(MAX) = fSCLK / 16. The device must be clocked within recommended SCLK pulse width limits (e.g., ≥23 ns high/low time at 5 V) to ensure reliable operation. TLV1570IPWRG4 performance degrades outside these timing constraints.

Does the TLV1570IPWRG4 support both internal and external voltage references?

Yes, the TLV1570IPWRG4 supports both internal and external reference modes. Internal reference is selected via control bit DI6 and provides either 2.3 V (for 3-V operation) or 3.8 V (for 5-V operation), with typical values of 2.26 V and 3.82 V respectively. In external mode, the REF pin accepts 0.6×AVDD to AVDD, and requires a 0.1 µF decoupling capacitor to AGND. TLV1570IPWRG4 does not output the internal reference voltage on the REF pin.

How does the channel auto-scan feature work on the TLV1570IPWRG4?

The TLV1570IPWRG4 auto-scan mode is enabled by setting control bit DI10 = 1. Channel sequence is defined by bits DI9–DI7 (e.g., 000 = CH0→CH1→…→CH7; 001 = CH1→CH3→CH5→CH7). Auto-scan resets when DI7 = 1. Each conversion advances to the next channel automatically, eliminating repeated SDIN writes. TLV1570IPWRG4 supports 11 distinct scan patterns, including forward, reverse, and interleaved sequences, all configurable per-cycle via the 16-bit control register.

What are the power-down modes available on the TLV1570IPWRG4 and how do they differ?

The TLV1570IPWRG4 offers two power-down modes: autopower-down (DI4 = 0) and software power-down (DI15 = 1). Autopower-down activates automatically 10 ns after conversion completes, drawing ≤300 µA and recovering in 1 SCLK. Software power-down requires explicit register write, draws ≤10 µA, and requires 16 SCLKs to resume. Both modes disable the ADC core and reference; only autopower-down affects the clock buffer in DSP mode. TLV1570IPWRG4 exits autopower-down on FS assertion (DSP) or next SCLK (µC).

Can the TLV1570IPWRG4 interface directly with SPI-compatible microcontrollers without additional components?

Yes, the TLV1570IPWRG4 interfaces directly with SPI-compatible microcontrollers using four wires: CS, SCLK, SDIN, and SDOUT. The FS pin must be tied high in µC mode to select SPI protocol. No level shifters, buffers, or glue logic are needed. TLV1570IPWRG4 supports standard SPI timing (CPOL = 0, CPHA = 0), accepts 2.7–5.5 V digital I/O, and tolerates SCLK frequencies up to 20 MHz at 5 V. Its 3-state outputs and CS-controlled power-down simplify system-level integration.