TDC1000 Front-End Datasheet

TDC1000 Datasheet PDF, Equivalent


Part Number

TDC1000

Description

Ultrasonic Sensing Analog Front-End

Manufacture

etcTI

Total Page 30 Pages
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TDC1000
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TDC1000, TDC1000-Q1
SNAS648B – OCTOBER 2014 – REVISED AUGUST 2015
TDC1000 Ultrasonic Sensing Analog Front End (AFE) for Level Sensing, Flow Sensing,
Concentration Sensing, and Proximity Sensing Applications
1 Features
1 Automotive AEC-Q100 (TDC1000-Q1)
• Measurement Range: Up to 8 ms
• Operating Current: 1.8 µA (2 SPS)
• Transmitter Channels TX1/TX2:
– Supports Single or Dual-Transducer
Application
– Programmable Excitation: 31.25 kHz to 4 MHz,
Up to 31 Pulses
• Receiver Channels RX1/RX2:
– STOP Cycle-to-Cycle Jitter: 50 psRMS
– Low-Noise and Programmable Gain Amplifiers
– Access to Signal Chain for External Filter
Design
– Programmable Threshold Comparator for Echo
Qualification
– Automatic Channel Swapping for Differential
Time-of-Flight (TOF) Measurement
– Programmable Low Power Mode for Long TOF
Measurements
• Temperature Measurement
– Interface to Two PT1000/500 RTDs
– RTD-to-RTD Matching Accuracy 0.02°CRMS
• Operating Temperature Range: -40°C to 125°C
2 Applications
• Measurements through tanks of varying materials:
– Fluid Level
– Fluid Identification / Concentration
• Flow Metering: Water, Gas, Heat
• Distance/Proximity Sensing
3 Description
The TDC1000 is a fully integrated analog front-end
(AFE) for ultrasonic sensing measurements of level,
fluid identification/concentration, flow, and proximity/
distance applications common in automotive,
industrial, medical, and consumer markets. When
paired with an MSP430/C2000 MCU, power, wireless,
and source code, TI provides the complete ultrasonic
sensing solution.
TI's Ultrasonic AFE offers programmability and
flexibility to accommodate a wide-range of
applications and end equipment. The TDC1000 can
be configured for multiple transmit pulses and
frequencies, gain, and signal thresholds for use with
a wide-range of transducer frequencies (31.25kHz to
4MHz) and Q-factors. Similarly, the programmability
of the receive path allows ultrasonic waves to be
detected over a wider range of distances/tank sizes
and through various mediums.
Selecting different modes of operation, the TDC1000
can be optimized for low power consumption,
making it ideal for battery powered flow meters,
level instrumentation, and distance/proximity
measurements. The low noise amplifiers and
comparators provide extremely low jitter, enabling
picosecond resolution and accuracy for zero and low
flow measurements.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TDC1000
TSSOP (28) PW
9.70 mm × 4.40 mm
TDC1000-Q1
TSSOP (28) PW
9.70 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

TDC1000
TDC1000, TDC1000-Q1
SNAS648B – OCTOBER 2014 – REVISED AUGUST 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 5
6.5 Electrical Characteristics........................................... 6
6.6 Timing Requirements ................................................ 8
6.7 Switching Characteristics .......................................... 8
6.8 Typical Characteristics .............................................. 9
7 Parameter Measurement Information ................ 11
8 Detailed Description ............................................ 12
8.1 Overview ................................................................. 12
8.2 Functional Block Diagram ....................................... 12
8.3 Feature Description................................................. 13
8.4 Device Functional Modes........................................ 20
8.5 Programming .......................................................... 31
8.6 Register Maps ......................................................... 32
9 Application and Implementation ........................ 41
9.1 Application Information............................................ 41
9.2 Typical Applications ................................................ 41
10 Power Supply Recommendations ..................... 51
11 Layout................................................................... 52
11.1 Layout Guidelines ................................................. 52
11.2 Layout Example .................................................... 52
12 Device and Documentation Support ................. 53
12.1 Device Support...................................................... 53
12.2 Documentation Support ........................................ 53
12.3 Related Links ........................................................ 53
12.4 Community Resources.......................................... 53
12.5 Trademarks ........................................................... 53
12.6 Electrostatic Discharge Caution ............................ 53
12.7 Glossary ................................................................ 53
13 Mechanical, Packaging, and Orderable
Information ........................................................... 54
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision A (December 2014) to Revision B
Page
• Added PW package nomenclature throught document.......................................................................................................... 1
• Changed programmed threshold in Figure 35, Multiple Echo Receive Mode (Zoom-in) .................................................... 25
• Added trigger to START time description ............................................................................................................................ 26
• Changed notes on Figure 37, Short TOF Measurement ..................................................................................................... 27
• Changed note A on Figure 38, Standard TOF Measurement ............................................................................................. 28
• Changed note A on Figure 39, Standard TOF Measurement with Blanking Enabled ......................................................... 29
• Changed Equation 9, downstream TOF ............................................................................................................................... 48
Changes from Original (October 2014) to Revision A
Page
• Added Pin Configuration and Functions section, Specifications section, Parameter Measurement Information
section, Detailed Description section, Application and Implementation section, Power Supply Recommendations
section and Layout section ..................................................................................................................................................... 1
• Changed Device and Documentation Support section .......................................................................................................... 1
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Product Folder Links: TDC1000 TDC1000-Q1


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design TDC1000, T DC1000-Q1 SNAS648B – OCTOBER 2014 – REVISED AUGUST 2015 TDC1000 Ultrasonic Sensing Analog Front End (AFE) for Lev el Sensing, Flow Sensing, Concentration Sensing, and Proximity Sensing Applica tions 1 Features •1 Automotive AEC-Q 100 (TDC1000-Q1) • Measurement Range: Up to 8 ms • Operating Current: 1.8 µA (2 SPS) • Transmitter Channels TX 1/TX2: – Supports Single or Dual-Tran sducer Application – Programmable Exc itation: 31.25 kHz to 4 MHz, Up to 31 P ulses • Receiver Channels RX1/RX2: STOP Cycle-to-Cycle Jitter: 50 psRMS – Low-Noise and Programmable Gain Amp lifiers – Access to Signal Chain for External Filter Design – Programmable Threshold Comparator for Echo Qualific ation – Automatic Channel Swapping fo r Differential Time-of-Flight (TOF) Mea surement – Programmable Low Power Mod e for Long TOF Measurements • Temperature Measurement – Interface to Two PT1000/500 RTDs – RTD.
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