and three integrated LED drivers with fifteen selectable drive levels. The Si1143-AAGX of-
fers excellent performance under a wide dynamic range and a variety of light sources from
525 nm to 940 nm. The Si1143-AAGX devices are provided in a 10- lead 4.9x2.85x1.2 mm
QFN package and are capable of operation from 1.71 to 3.6 V over the –40 to +85 °C tem-
perature range.
Applications:
• Fitness Bands
• Smart Watches
• Other Wearables
• Healthcare
KEY FEATURES
• Fully integrated heart rate module IC
• Green LED with lens
• High-sensitivity photodiode
• Low-noise analog-to-digital converter
and filtering
• LED drivers
• Optical blocking
• Host communications and interrupts
• Accurate sensing of weak blood flow
signals on the wrist
• Three independent regulated LED
drivers
• Scalable from cost-sensitive single
LED systems to high performance
three LED systems
• Programmable from 6 mA to 360 mA
each
• Integrated green LED ideal for wrist
based heart rate applications
• Add up to 2 external LEDs
Si1143 Optical Heart Rate Sensor
VDD
Regulator
Temp
A
M
U
X
Filter
LED
Drivers
LED1
LEDA
LED1
• Broad spectral sensitivity supports
green through 940 nm LEDs
• No additional optical blocking required
• Low power consumption
• 1.71 to 3.6 V supply voltage
• 25.6 µs LED “on” time keeps total
power consumption duty cycle low
without compromising performance
or noise immunity
• < 500 nA standby current
• Internal and external wake support
ADC
LED3
LED2
LED3
LED2
Visible
Infrared
Digital Sequencer & Control Logic
INT
SCL
SDA
I
2
C
Registers
Oscillator
GND
Si1143-AAGX Sensor Module Block Diagram
• Built-in voltage supply monitor and
power-on reset controller
• I
2
C serial communications
• Up to 3.4 Mbps data rate
• Slave mode hardware address
decoding (0x5A)
• 10-lead 4.9x2.85x1.2 mm LGA Module
• Temperature Range
• –40 to +85 °C
silabs.com
| Smart. Connected. Energy-friendly.
Rev. 0.9
Si1143-AAGX Data Short
Si1143-AAGX Information
1. Si1143-AAGX Information
Si1143-AAGX Module Application Schematic with up to 3 LEDs and Separate LED Power Supply
Table 1.1. Recommended Operating Conditions
Parameter
V
DD
Supply Voltage
V
DD
OFF Supply Voltage
V
DD
Supply Ripple Voltage
1
Symbol
V
DD
V
DD_OFF
OFF mode
V
DD
= 3.3 V
1 kHz – 10 MHz
Operating Temperature
SCL, SDA, Input High Logic Volt-
age
SCL, SDA Input Low Logic
Voltage
LED Emission Wavelength
LED Supply Voltage
LED Supply Ripple Voltage
1
l
VLED
0–30 kHz
30 kHz – 100 MHz
—
—
Start-Up Time
LED3 Voltage
Note:
1. Supply voltage ripple sensitivity depends on the voltage at the LEDx pins when turned on.
V
DD
above 1.71 V
Start-up
25
V
DD
x 0.77
—
—
—
—
250
100
—
—
mVpp
mVpp
ms
V
—
4.1
525
—
—
5.0
nm
V
T
I
2
CVIH
I
2
CVIL
–40
V
DD
x 0.7
0
25
—
—
85
V
DD
V
DD
x 0.3
°C
V
V
Test Condition
Min
1.71
–0.3
—
—
Typ
—
Max
3.6
1.0
50
Unit
V
V
mVpp
Table 1.2. Ordering Guide
Part Number
Si1143-AAGX-GMR
Package
4.9 x 2.85 x 1.2 mm LGA Module
LED Drivers
3 LED drivers, 1 green LED integrated
silabs.com
| Smart. Connected. Energy-friendly.
Rev. 0.9 | 1
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Connected.
Energy-Friendly
Products
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Disclaimer
Silicon Laboratories intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers
using or intending to use the Silicon Laboratories products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific
device, and "Typical" parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. Silicon Laboratories
reserves the right to make changes without further notice and limitation to product information, specifications, and descriptions herein, and does not give warranties as to the accuracy
or completeness of the included information. Silicon Laboratories shall have no liability for the consequences of use of the information supplied herein. This document does not imply
or express copyright licenses granted hereunder to design or fabricate any integrated circuits. The products must not be used within any Life Support System without the specific
written consent of Silicon Laboratories. A "Life Support System" is any product or system intended to support or sustain life and/or health, which, if it fails, can be reasonably expected
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翻译自——EEtimes 据据外媒报道，尽管半导体行业的资本支出(capex)预计在今年将下降3%，但由于Covid-19的爆发，这一数字并没有降低。 IC Insights认为，目前半导体行业-3%的资本支出预期存在下行风险。然而，由于绝大多数的支出是针对工艺技术进步的长期目标或晶圆片启动能力的增加，因此预计大部分支出将按计划进行。 然而，如果今年上半年没有遏制住Covid-19的...[详细]
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