TLV1544 概述

The TLV1544 and TLV1548 are CMOS 10-bit switched-capacitor successive-approximation (SAR) analog-to-digital (A/D) converters. Each device has a chip select (CS\), input-output clock (I/O CLK), data input (DATA IN) and serial data output (DATA OUT) that provide a direct 4-wire synchronous serial peripheral interface (SPITM, QSPITM) port of a host microprocessor. When interfacing with a TMS320 DSP, an additional frame sync signal (FS) indicates the start of a serial data frame. The devices allow high-speed data transfers from the host. The (INV CLK)\ input provides further timing flexibility for the serial interface.

The TLV1544 has four analog input channels while the TLV1548 has eight analog input channels. The TLV1544C and TLV1548C are characterized for operation from 0°C to 70°C. The TLV1544I and TLV1548I are characterized for operation over the full industrial temperature range of -40°C to 85°C. The TLV1548M is characterized for operation over the full military temperature range of -55°C to 125°C.

TLV1544 特性

• Conversion Time <= 10 us
• 10-Bit-Resolution ADC
• Programmable Power-Down Mode: 1 uA
• Wide Range Single-Supply Operation of 2.7 V dc to 5.5 V dc
• Analog Input Range of 0 V to V_CC
• Built-in Analog Multiplexer with 8 Analog Input Channels
• TMS320 DSP and Microprocessor SPI and QSPI Compatible Serial Interfaces
• End-of-Conversion (EOC) Flag
• Inherent Sample-and-Hold Function
• Built-In Self-Test Modes
• Programmable Power and Conversion Rate
• Asynchronous Start of Conversion for Extended Sampling
• Hardware I/O Clock Phase Adjust Input