CH101
Ultra-low Power Integrated Ultrasonic Time-of-Flight Range Sensor
CH101 HIGHLIGHTS
APPLICATIONS
The CH101 is a miniature, ultra-low-power ultrasonic Time-of-
Flight (ToF) range sensor. Based on Chirp’s patented MEMS
technology, the CH101 is a system-in-package that integrates
a PMUT (Piezoelectric Micromachined Ultrasonic Transducer)
together with an ultra-low-power SoC (system on chip) in a
miniature, reflowable package. The SoC runs Chirp’s
advanced ultrasonic DSP algorithms and includes an
integrated microcontroller that provides digital range
readings via I2C.
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Augmented and Virtual Reality
Robotics
Obstacle avoidance
Mobile and Computing Devices
Proximity/Presence sensing
Ultra-low power remote presence-sensing nodes
Home/Building automation
FEATURES
Complementing Chirp’s long-range CH201 ultrasonic ToF
sensor product, the CH101 provides accurate range
measurements to targets at distances up to 1.2m. Using
ultrasonic measurements, the sensor works in any lighting
condition, including full sunlight to complete darkness, and
provides millimeter-accurate range measurements
independent of the target’s color and optical transparency.
The sensor’s Field-of-View (FoV) can be customized and
enables simultaneous range measurements to multiple
objects in the FoV. Many algorithms can further process the
range information for a variety of usage cases in a wide range
of applications.
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Fast, accurate range-finding
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Operating range from 4 cm to 1.2m
Sample rate up to 100 samples/sec
1.0 mm RMS range noise at 30 cm range
Programmable modes optimized for medium
and short-range sensing applications
Customizable field of view (FoV) up to 180°
Multi-object detection
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Works in any lighting condition, including full
sunlight to complete darkness
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Insensitive to object color, detects optically
transparent surfaces (glass, clear plastics, etc.)
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Easy to integrate
The CH101-00ABR is a Pulse-Echo product intended for range
finding and presence applications using a single sensor for
transmit and receive of ultrasonic pulses. The CH101-02ABR is
a frequency matched Pitch-Catch product intended for
applications using one sensor for transmit and a second
sensor for receiving the frequency matched ultrasonic pulse.
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Single sensor for receive and transmit
Single 1.8V supply
I2C Fast-Mode compatible interface, data rates
up to 400 kbps
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Dedicated programmable range interrupt pin
Platform-independent software driver enables
turnkey range-finding
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Miniature integrated module
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3.5 mmx 3.5 mm x 1.26 mm, 8-pin LGA package
Compatible with standard SMD reflow
Low-power SoC running advanced ultrasound
firmware
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Operating temperature range: -40°C to 85°C
DEVICE INFORMATION
Ultra-low supply current
PART NUMBER
CH101-00ABR
CH101-02ABR
OPERATION
PACKAGE
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1 sample/s:
Pulse-Echo
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13 µA (10 cm max range)
15 µA (1.0 m max range)
3.5 x 3.5 x 1.26mm LGA
3.5 x 3.5 x 1.26mm LGA
Pitch-Catch
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30 samples/s:
RoHS and Green-Compliant Package
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20 µA (10 cm max range)
50 µA (1.0 m max range)
Chirp Microsystems
2560 Ninth Street, Ste 200, Berkeley, CA 94710 U.S.A
+1(510) 640–8155
Document Number: DS-000331
Revision: 1.4
Release Date: 12/23/2020
Chirp Microsystems reserves the right to change
specifications and information herein without notice.
www.chirpmicro.com