TI TDC1000：超声波感测模拟前端(AFE)解决方案

需积分: 8 174 浏览量更新于2024-06-28 4 收藏 2.5MB PDF 举报

身份认证购VIP最低享 7 折!

领优惠券(最高得80元）

"TI-TDC1000是一款专为超声波感测应用设计的模拟前端(AFE)，适用于液位、流量、浓度检测及接近传感等用途，尤其适合汽车、工业、医疗和消费品市场。该器件符合汽车级AEC-Q100标准，具有高集成度和低功耗特性，能支持单传感器或双传感器配置。TDC1000的工作电流仅为1.8µA，在2SPS采样率下运行。" TI-TDC1000的主要特性包括： 1. **宽广的测量范围**：能够处理高达8毫秒的测量时间，适用于各种距离和应用。 2. **灵活的配置**：可编程的激励频率从31.25kHz到4MHz，支持31个脉冲，适应不同频率和传感器要求。 3. **接收通道功能**：接收器通道RX1/RX2具有50ps RMS的逐周期抖动，低噪声可编程增益放大器，以及针对回声质量检查的可编程阈值比较器。 4. **节能设计**：具备可编程的低功耗模式，以适应长时间TOF测量，同时支持自动通道交换，优化差动飞行时间测量。 5. **温度测量能力**：内置2个PT1000/500 RTD接口，RTD间匹配精度达0.02°C RMS，可进行精确的温度监测。 6. **工作温度范围广泛**：能在-40℃至125℃的环境中稳定工作，适应各种环境条件。 TI-TDC1000的优势在于其高度的灵活性和可编程性，允许用户根据具体应用需求调整参数。此外，低噪声放大器和比较器确保了信号的高质量，即便在低流量或远距离情况下也能准确检测到超声波回声。该器件可以与MSP430/C2000 MCU、电源、无线网络和软件配合，为用户提供完整的超声波传感解决方案。在实际应用中，TDC1000可用于汽车行业的流量计和液位传感器，工业领域的液位监控，医疗设备的浓度测量，以及消费品市场的接近传感等场景。其低功耗特性使其特别适合电池供电的设备，确保长期稳定运行。总体来说，TI-TDC1000是一款高效、可靠的超声波传感前端，为各类感测应用提供了强大的技术支持。

资源详情

资源推荐

-300

-200

-100

100

200

300

Count (%)

Time (ps)

C011

-300

-200

-100

100

200

300

Count (%)

Time (ps)

C012

-300

-200

-100

100

200

300

Count (%)

Time (ps)

C009

-300

-200

-100

100

200

300

Count (%)

Time (ps)

C010

10k 100k 1M 10M

±30

±20

±10

Gain (dB)

Frequency (Hz)

C007

10k 100k 1M 10M

±30

±20

±10

Gain (dB)

Frequency (Hz)

C008

TDC1000

TDC1000-Q1

ZHCSD54B –OCTOBER 2014–REVISED AUGUST 2015

www.ti.com.cn

Typical Characteristics (continued)

At T

= 25°C, unless otherwise noted.

= V

= 3.7V Capacitive R

= 100kΩ V

= V

= 3.7V Gain of 21dB R

= 100kΩ

Feedback Mode

= 300 pF

Figure 8. LNA Gain vs Frequency

Figure 9. PGA Gain vs Frequency

= V

= 5V LNA Capacitive PGA Gain of 6dB V

= V

= 3.7V LNA Capacitive PGA Gain of 6dB

Feedback Mode Feedback Mode

= 100mV f

= 1MHz V

= 100mV f

= 1MHz

(See Figure 14) Count >= 10000 T

= 25C° (See Figure 14) Count >= 10000

Figure 10. RX Jitter Histogram Figure 11. RX Jitter Histogram

= V

= 3.7V LNA Capacitive PGA Gain of 6dB V

= V

= 3.7V LNA Capacitive PGA Gain of 6dB

Feedback Mode Feedback Mode

= 100mV f

= 1MHz V

= 100mV f

= 1MHz

= -40C° (See Figure 14) Count >= 10000 T

= 125C° (See Figure 14) Count >= 10000

Figure 12. RX Jitter Histrogam Figure 13. RX Jitter Histogram

Threshold Detect

Zero-Cross Detect

VCOM

GND

RREF

RTD2

RTD1

START

STOP

SDO

SDI

SCLK

CSB

CLKIN

PGAIN

PGAOUT

COMPIN

ERRB

VIO

VDD

TDC1000

RX1

RX2

MUX

LNA

LNAOUT

enable

DAC

Temp. Sense

20 dB

0 to 21 dB

TRIGGER

RESET

CHSEL

VDD

VCOM

Generator

Clock

Divider

SM Control

Unit

Serial

Interface

Event

Manager

Analog Bias

PGA

Channel

Select

MUX

TX2

TX1

TDC1000

TDC1000-Q1

ZHCSD54B –OCTOBER 2014–REVISED AUGUST 2015

www.ti.com.cn

8 Detailed Description

8.1 Overview

The main functional blocks of TDC1000 are the Transmit (TX) and the Receive (RX) Channels. The transmitter

supports flexible settings for driving various ultrasonic transducers, and the receiver provides configurable blocks

with a wide range of settings for signal conditioning in various applications. The receive signal chain consists of

an LNA (Low Noise Amplifier), a PGA (Programmable Gain Amplifier), and two auto-zeroed comparators for

echo qualification and STOP pulse generation.

The TDC1000 provides three modes of operation: Mode 0, Mode 1 and Mode 2. Each mode is intended for one

or more applications such as flow/concentration measurement, container level measurement, proximity detection,

distance measurement, and a range of other applications where a precision measurement of Time-of-Flight

(TOF) is required.

A measurement cycle is initiated with a trigger signal on the TRIGGER pin of the device. After a trigger signal is

asserted, an output pulse is generated on the START pin. This signal is used as the time reference to begin a

TOF measurement. The transmitter generates programmable TX pulses, synchronous to the rising edge of the

START pulse, to drive an ultrasonic transducer and generate an ultrasonic wave that is shot through an acoustic

medium. The receiver detects the ultrasound wave that traveled through the medium and generates STOP

signals. Whether the ultrasound wave is received directly or from a reflection will depend on the system

configuration. The STOP signals are used by an external Time-to-Digital Converter (TDC), which functions as a

very accurate stopwatch. The system must include a TDC to measure the TOF based on the interval between

the START and STOP pulses. In some applications with medium-range accuracy requirements (ns range), a

microcontroller can be used to measure the TOF duration. In applications with high-range accuracy requirements

(ps range), TI recommends using the TDC7200 time-to-digital converter to measure the TOF duration.

In each application, the TDC1000 has to be configured by a serial interface (SPI) for one of the three modes of

operation available. In addition, the device must be programmed to various application-specific parameters that

are explained in the following sections.

8.2 Functional Block Diagram

剩余59页未读，继续阅读

不觉明了

粉丝: 3271
资源: 5614

会员权益专享

TI TDC1000：超声波感测模拟前端(AFE)解决方案

TI-TDC1011-Q1.pdf

TI-TDC1011.pdf

TI-TDC7200.pdf

ti tdc1000+msp430超声波流量计参考设计

TDC-GP22用户手册.pdf

stm32与TDC-GP22怎样连接

tdc-gp22 调试

tdc-gp22官方程序

STM32与TDC-GP22如何连接

tdc-gp22配置库函数的软件

如何实现FPGA与TDC-GP22通信

tdc-gp21芯片手册

R语言 tdc(time,value)

tdc-gp22测距寄存器

tdc-gp22 stm32官方例程

tdc-gp22 stm32

stm32与TDC-GP22连接

tdc gp-22时序

给个TDC-GP22的应用实例

会员权益专享

最新资源