TDCs - Time-to-Digital Converters

GP22 Evaluation-Kit

The term time-to-digital converter is used when talking about time interval measurements in the range of 1 nanosecond down to the picosecond range. The first TDCs have been developed for scientific and research purposes. They have been realized as a combination of time-to-analog (TAC) and analog-to-digital (ADC) converter. A sophisticated design of the TAC together with limitations to update rate or multihit capability make these solutions inattractive for industrial applications.

Integrated digital TDCs

Thanks to modern CMOS-technology it is possible to integrate fully digital time-to-digital converters into a single chip. The high precision of the time measurement - down to 14 ps - in combination with the large dynamic range (up to 30 Bit), the high stability over temperature and supply voltage and the possibilty of a low cost production thanks to the CMOS technology make them the first choice for industrial applications.

Advantages:

• ultra low current consumption with only few µA.
• up to 8 STOP-channels.
• automatically calibration of the measured value.
• external reference clock in the range of 1 to 40 MHz.

Applications:

• Time-of-Flight measurement
• Time-of-Flight spectroscopy
• Laser distance measurement (Laser Range Finder – LRF)
• Laser scanner
• Magnetostrictive positioning systems
• Biomedical equipment (Automatic Test Equipment - ATE)

• UFC - Ultrasonic Flow Converters

  TDC-GP30 - System integrated solution for ultrasonic based heat-, water-, and gas meters and industrial flow meters

   

  Ultrasonic flow meters for heat, water and gas get more and more popular. From the beginning acam TDC products successfully solved the time-of-flight measurement task in those applications. With the UFC family acam provides solutions that extend the pure time measurement functionality. The flow measurement part of the electronics can be designed in a very compact manner as the main elements of the analog frontend like comparator and temperature measurement are already integrated into the UFC.

   

   

  DATA SHEETS ARE NOW RELEASED

• Volume 1: General Data and Frontend Description
• Volume 2: DSP, Memory and Firmware
• Development System for GP30

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  Advantages:

• Standard MCU can operate ultrasonic or mechanical systems.
• Uniform software of MCU can operate ultrasonic as well as mechanical systems.
• MCU software requires no know-how about ultrasonic physics and measurement methods.
• Power consumption is mainly controlled by GP30. Therefore it is easy to meet ultra-low power requirements for MCU.
• High measurement frequency can be implemented to accuray measure high dynamic flows and prevent from manipulation of water meters.
• Current consumption in operation is 1/3 of GP22.
• Independent calibration  of the spool piece becomes possible. External MCU is not involved in calibration.
• MCU is entirely available for communication and security functions.

• Applications:

• Ultrasonic heat meters
• Ultrasonic water meters
• Industrial flow indicators
• Ultrasonic gas meters
• Ultrasonic density meters

PicoStrain - Stands for an innovative digital concept to measure resistance

PS09 Evaluation-Kit

Measuring strain gages is one of the big challenges for sensor technology, especially the weighing industry. Due to the small excitation of the strain gages on a load cell of only 0.2 % (2000 ppm) full scale, and due to the high resolution of 16 Bit and more, the resistors must be measured with a precision deeply in the ppb range. Reasonably, this can only be done measuring the ratio of the resistors.

Here the ^® measuring principle is breaking new grounds compared to A/D converters. The ratio of the resistors is ascribed to a time interval measurement, not to a voltage difference like in Wheatstone bridges. The sensor's resistors together with a capacitor act as low-pass filters. The capacitor, charged to Vcc, is discharged through the sensor's resistors. The discharge time to trigger level (selectable) is precisely measured by a TDC (Time-to-Digital Converter).

The ^® integrated circuits are realized without any analog component. Again, acam uses its TDC technology to set new standards in circuit design.

Advantages:

• No elaborate supply of the strain gage
• No need for a full-bridge, 2 resistors (half-bridge) are sufficient
• Reduction of the current into the strain gage (total system current down to a few µA)
• Easy temperature compensation
• No reference voltage
• Flexibility in update rate, precision and current consumption
• Wide temperature range up to process limits

Applications:

• Strain gage sensors
• Force sensors
• Pressure sensors
• Torque wrenches
• Digital load cells
• Bathroom scales (solar and battery)
• Kitchen scales (solar and battery)
• Legal for trade scales (OIML, NTEP)

PicoTurn - The Successful Solution To Detect Turbo Speed

PicoTurn-2G System

With the ^® product family, acam has established a popular and well-known series of rotational speed sensors for turbochargers. This product family demonstrates the wide range of applications covered by precision time measurements. ^® represents a mature and cost effective measurement system for end users.

Features:

• Measuring principle:
  Detecting the influence of metal on inductance parameters
• Self-adjustment simplifies mounting
• Comfortable spacing sensor-wheel
• Suitable even for small compressor wheels (32 mm)
• Rotational speeds up to 400.000 rpm
• Digital and / or analog output

Advantages:

• Easy to mount
• No modification of rotating parts
• Sensing directly the compressor wheel
• High-temperature sensors up to 230 °C
• Suitable for single stage and two stage systems
• Attractive price
• Compact

Applications:

• Turbo wheel speed measurement in:
  • Engine test stations
  • Test cars: passenger cars and commercial vehicles
  • auxiliary equipment
• In general speed measurement for any rotating metal part

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部分型號

ACAM-PCap01AK-0301芯片

ACAM-MNR 1839 TDC-GP21

ACAM-PT2G-C-2B

ACAM-PT2G-XS-10

ACAM-PT2G-BD V1.0 System

ACAM-PT2G-SM5F.3 Sensor

ACAM-PT2G-SM5.3傳感器

TDC-GP30

TDC-GP30-DEV-KIT

TDC-GP22

GP22-EVA-KIT

GP22-DEMO-KIT

TDC-GP21

GP21-EVA-KIT

TDC-GP2

TDC-GP1

TDC-GPX

TDC-GPX -FG

PCapØ2A

PCapØ2AE

PCapØ2-EVA-KIT

PCapØ1A

PCapØ1AD

PCapØ1AK

PCapØ1-EVA-KIT

PSØ9

PSØ9FN

PSØ9-EVA-KIT

PSØ9-DLC-EVA-KIT

PSØ81

PSØ81FN

PSØ81-EVA-KIT

PSØ81-DLC-EVA-KIT

PSØ21

PSØ21FN

PSA21-STD

PSA21-WSB

PSA21mini-STD

PSA21mini-WSB

PicoProg Uni System V2.0

PT2G-H-SM5.3

PT2G-H-SM5.5

PT2G-H-SM5.6

PT2G-H-SM5F.2

PT2G-H-SM5F.3

PT2G-H-SM5F.5

PT2G-SM5.3

PT2G-SM5.5

PT2G-SM5.6

PT2G-SM5F.2

PT2G-SM5F.3

PT2G-SM5F.5

PT2G-BX

PT2G-BD

PT2G-XS-01.5

PT2G-XS-03

PT2G-XS-05

PT2G-XS-10

PT2G-C-2B

PT2G-C-2U

PT2G-C-2B&2BNC

PT2G-X-CT

PT2G-C-BNCM8

PT2G-C-CSM2M

PT2G-C-CSM10M

PT2G-C-ETAS_E441

PT2G-C-IPTRKLM

PT2G-C-IPTRKLM2M

PicoTurn-SM5.1

PicoTurn-SM5.3

PicoTurn-SM5.5

PicoTurn-SM5.6

PicoTurn-SM5F.2

PicoTurn-SM5F.3

PicoTurn-SM5F.5

PicoTurn-BM V6.2

PicoTurn-BM V6.2

PicoTurn-CT

Extension cable

Clamping nut