TLC548中文资料8 位、45.5kSPS ADC，串行输出、低功耗、与 TLC540/545/1540 兼容、单通道数据手册TI规格书

描述 Description

The TLC548 and TLC549 are CMOS analog-to-digital converter (ADC) integrated circuits built around an 8-bit switched-capacitor successive-approximation ADC. These devices are designed for serial interface with a microprocessor or peripheral through a 3-state data output and an analog input. The TLC548 and TLC549 use only the input/output clock (I/O CLOCK) input along with the chip select (CS\\) input for data control. The maximumI/O CLOCK input frequency of the TLC548 is 2.048 MHz, and the I/O CLOCK input frequency of the TLC549 is specified up to 1.1 MHz. Operation of the TLC548 and the TLC549 is very similar to that of the more complex TLC540 and TLC541 devices; however, the TLC548 and TLC549 provide an on-chip system clock that operates typically at 4 MHz and requires no external components. The on-chip system clock allows internal device operation to proceed independently of serial input/output data timing and permits manipulation of the TLC548 and TLC549 as desired for a wide range of software and hardware requirements. The I/O CLOCK together with the internal system clock allow high-speed data transfer and conversion rates of 45 500 conversions per second for the TLC548, and 40 000 conversions per second for the TLC549. Additional TLC548 and TLC549 features include versatile control logic, an on-chip sample-and-hold circuit that can operate automatically or under microprocessor control, and a high-speed converter with differential high-impedance reference voltage inputs that ease ratiometric conversion, scaling, and circuit isolation from logic and supply noises. Design of the totally switched-capacitor successive-approximation converter circuit allows conversion with a maximum total error of ±0.5 least significant bit (LSB) in less than 17 us. The TLC548C and TLC549C are characterized for operation from 0°C to 70°C. The TLC548I and TLC549I are characterized for operation from -40°C to 85°C.

特性 Features

·Microprocessor Peripheral or Standalone Operation ·8-Bit Resolution A/D Converter ·Differential Reference Input Voltages ·Conversion Time. . . 17 us Max ·Total Access and Conversion Cycles Per Second - TLC548 . . . up to 45 500 - TLC549 . . . up to 40 000 ·On-Chip Software-Controllable Sample-and-Hold Function ·Total Unadjusted Error . . . ±0.5 LSB Max ·4-MHz Typical Internal System Clock ·Wide Supply Range . . . 3 V to 6 V ·Low Power Consumption . . . 15 mW Max ·Ideal for Cost-Effective, High-Performance Applications including Battery-Operated Portable Instrumentation ·Pinout and Control Signals Compatible With the TLC540 and TLC545 8-Bit A/D Converters and with the TLC1540 10-Bit A/D Converter ·CMOS Technology

简介

TLC548属于集成电路（IC）的模数转换器（ADC）。由TI制造生产的TLC548模数转换器（ADC）模数转换器（ADC、A/D 或 A 转 D）对模拟信号进行采样，例如由麦克风采集的声音或传感器的输出，然后将其转换为数字信号。一般来说，数字输出是二进制补码二进制数，与输入成比例。输入类型可能是差分、伪差分或单端输入。模数转换器可按照位数、采样率、输入数、接口、转换器数和架构（例如自适应增量、双斜率、折叠、流水线、SAR、三角积分、两步式）进行选择。