TLV1543CN10A/D高精度10位A/D转换器详解

需积分: 9 173 浏览量更新于2024-08-02 收藏 650KB PDF 举报

TLC1543CN10A/D转换器是一款高性能的模拟数字转换器，专为工业级应用设计。这款10位分辨率的转换器具有低功耗、快速转换速度和灵活的接口选项，使其在现代电子系统中表现出色。首先，TLC1543系列包括多个型号：TLV1544C、TLV1544I、TLV1548C、TLV1548I和TLV1548M，这表明它有一个产品家族，适应不同的应用需求。这些器件采用CMOS工艺制造，基于先进的开关电容式 Successive Approximation (SAR) 转换技术，能实现高精度的数据转换。其核心特性包括： 1. **快速转换时间**：转换过程能在极短的时间内完成，最高可达10微秒，这对于实时数据采集或对速度有严格要求的应用来说非常重要。 2. **10位分辨率**：转换后的数据具有10位精度，这意味着它能提供丰富的模拟信号细节，适合对数据质量有较高要求的场合。 3. **可编程电源管理模式**：支持低功耗模式，当系统处于休眠状态时，功耗仅需1微安，节省能源的同时延长设备寿命。 4. **宽工作电压范围**：TLC1543能够支持单电源操作，工作电压从2.7伏到5.5伏，适用范围广泛，适应多种电源环境。 5. **多通道输入**：内置8路模拟输入通道的模拟多路复用器，方便连接多个传感器或信号源。 6. **兼容性强**：兼容TMS320 DSP和微处理器，支持SPI和QSPI（Quad SPI）串行接口，简化了与主控制器的连接和通信。 7. **功能特性**：具备EOC（End-of-Conversion）标志，用于检测转换完成，内置采样保持功能，以及自测试模式，提高了系统的可靠性和稳定性。 8. **可编程性能**：用户可以调整电源消耗和转换速率，满足不同应用场景下的灵活性。 9. **异步启动**：支持异步模式，使得转换可以在外部时钟触发下进行，增加了采样时间的选择范围。 10. **硬件I/O时钟调整**：提供硬件I/O时钟相位调整输入，允许微调时钟以优化系统同步。 TLC1543CN10A/D转换器是一款适用于多种应用的高性价比选择，尤其适用于需要高速、高精度和低功耗的嵌入式系统和工业自动化项目。通过其丰富的功能和广泛的兼容性，它能够简化系统设计，提高效率，并降低总体成本。

www.Chinadz.Com

TLV1544C, TLV1544I, TLV1548C, TLV1548I, TLV1548M

LOW-VOLTAGE 10-BIT ANALOG-TO-DIGITAL CONVERTERS

WITH SERIAL CONTROL AND 4/8 ANALOG INPUTS

SLAS139C – DECEMBER 1996 – REVISED JANUARY 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

input data bits

DATA IN is internally connected to a 4-bit serial input data register. The input data selects a different mode or

selects different analog input channels. The host provides the data word with the MSB first. Each data bit clocks

in on the edge (rising or falling depending on the status of INV CLK

and FS) of the I/O CLK sequence. The input

clock can be inverted by grounding INV CLK

(see Table 3 for the list of software programmed operations set

by the input data).

Table 3. TLV1544/1548 Software-Programmed Operation Modes

INPUT DATA BYTE

FUNCTION SELECT

A3 – A0

COMMENT

BINARY HEX

Analog channel A0 for TLV1548 selected 0000b 0h Channel 0 for TLV1544

Analog channel A1 for TLV1548 selected 0001b 1h

Analog channel A2 for TLV1548 selected 0010b 2h Channel 1 for TLV1544

Analog channel A3 for TLV1548 selected 0011b 3h

Analog channel A4 for TLV1548 selected 0100b 4h Channel 2 for TLV1544

Analog channel A5 for TLV1548 selected 0101b 5h

Analog channel A6 for TLV1548 selected 0110b 6h Channel 3 for TLV1544

Analog channel A7 for TLV1548 selected 0111b 7h

Software power down set 1000b 8h No conversion result (cleared by any access)

Fast conversion rate (10 µs) set 1001b 9h No conversion result (cleared by setting to fast)

Slow conversion rate (40 µs) set 1010b Ah No conversion result (cleared by setting to slow)

Self-test voltage (V

ref

)

– V

ref–

)/2 selected 1011b Bh Output result = 200h

Self-test voltage V

ref

selected 1100b Ch Output result = 000h

Self-test voltage V

ref

)

selected 1101b Dh Output result = 3FFh

Reserved 1110b Eh No conversion result

Reserved 1111b Fh No conversion result

analog inputs and internal test voltages

The eight analog inputs and the three internal test inputs are selected by the 11-channel multiplexer according

to the input data bit as shown in Table 3. The input multiplexer is a break-before-make type to reduce

input-to-input noise injection resulting from channel switching.

The device can be operated in two distinct sampling modes: normal sampling mode (fixed sampling time) and

extended sampling mode (flexible sampling time). When CSTART

is held high, the device is operated in normal

sampling mode. When operated in normal sampling mode, sampling of the analog input starts on the rising edge

of the fourth I/O CLK pulse in the microprocessor interface mode (and on the fourth falling edge of I/O CLK in

the DSP interface mode). Sampling continues for 6 I/O CLK periods. The sample is held on the falling edge of

the tenth I/O CLK pulse in the microprocessor interface mode. The sample is held on the falling edge of the tenth

I/O CLK pulse in the DSP interface mode.The three test inputs are applied to the multiplexer, then sampled and

converted in the same manner as the external analog inputs.

Free Datasheet Download http://www.Chinadz.Com

http://www.Icver.Com

www.Chinadz.Com

TLV1544C, TLV1544I, TLV1548C, TLV1548I, TLV1548M

LOW-VOLTAGE 10-BIT ANALOG-TO-DIGITAL CONVERTERS

WITH SERIAL CONTROL AND 4/8 ANALOG INPUTS

SLAS139C – DECEMBER 1996 – REVISED JANUARY 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

converter

The CMOS threshold detector in the successive-approximation conversion system determines the value of

each bit by examining the charge on a series of binary-weighted capacitors (see Figure 1). In the first phase

of the conversion process, the analog input is sampled by closing the S

switch and all S

switches

simultaneously. This action charges all of the capacitors to the input voltage.

In the next phase of the conversion process, all S

and S

switches are opened and the threshold detector

begins identifying bits by identifying the charge (voltage) on each capacitor relative to the reference (REF –)

voltage. In the switching sequence, ten capacitors are examined separately until all ten bits are identified and

then the charge-convert sequence is repeated. In the first step of the conversion phase, the threshold detector

looks at the first capacitor (weight = 512). Node 512 of this capacitor is switched to the REF+ voltage, and the

equivalent nodes of all the other capacitors on the ladder are switched to REF –. If the voltage at the summing

node is greater than the trip point of the threshold detector (approximately one-half V

), a bit 0 is placed in the

output register and the 512-weight capacitor is switched to REF –. If the voltage at the summing node is less

than the trip point of the threshold detector, a bit 1 is placed in the register and the 512-weight capacitor remains

connected to REF + through the remainder of the successive-approximation process. The process is repeated

for the 256-weight capacitor, the 128-weight capacitor, and so forth down the line until all bits are counted.

With each step of the successive-approximation process, the initial charge is redistributed among the

capacitors. The conversion process relies on charge redistribution to count and weigh the bits from MSB to LSB.

Threshold

Detector

Node 512

REF–

REF+

512

To Output

Latches

REF–

REF+

REF–

REF+

REF–

REF+

REF–

REF+

REF–

REF+

REF–

11248128256

REF–

Figure 1. Simplified Model of the Successive-Approximation System

Free Datasheet Download http://www.Chinadz.Com

http://www.Icver.Com

剩余36页未读，继续阅读

cbogsc

粉丝: 8
资源: 5

TLV1543CN10A/D高精度10位A/D转换器详解

串行A／D转换器TLC548／549及其应用.pdf

12 位A/ D 转换器TLC2543 与51 系列

89c51代码 A/D转换 D/A转换

如何利用STC89C52单片机，PT-100温度传感器以及TLC083串行A/D转换器搭建一个实时温度采集和超温报警系统？请详细说明硬件连接和编程步骤。

如何使用STC89C52单片机结合TLC083串行A/D转换器和PT-100温度传感器实现温度的实时采集和超温报警系统？

TLC2543型号A/D转换电路

在设计基于89C52单片机的智能电子秤时，如何选择合适的A/D转换器以确保高精度称重结果？请提供相关技术参数和选型建议。

5. 电位器RV1的电压送入TLC549进行A/D转换，TLC549将转换后的电压值通过SPI接口送入80C51，单片机对电压值进行判断，如果电压值高于2.5V，则将LED D1点亮，否则熄灭D1。

在设计一个多路电压监控报警系统时，如何通过A/D转换器TLC0809和单片机SST89E58实现从模拟信号到数字信号的转换，并确保系统能够支持用户自定义报警阈值的功能？

tlc1543ad转换电路

最新资源