Datasheet
DS000XXX
AS7050
Analog Frontend for Vital Sign Monitoring
v3-00 • 2022-Mar-17
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AS7050
Content Guide
Content Guide
1
General Description ...................... 3
7
Soldering & Storage Information 13
1.1
1.2
1.3
Key Benefits & Features ............................... 4
Applications .................................................. 4
Block Diagram .............................................. 5
8
Revision Information ................... 14
9
Legal Information ......................... 15
2
Ordering Information .................... 6
3
Absolute Maximum Ratings ......... 7
4
Electrical Characteristics ............. 8
5
Package Drawings & Markings ...11
6
Tape & Reel Information ..............12
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1
AS7050
General Description
General Description
The AS7050 Biosignal Sensor Analog Frontend is the next generation Vital Sign Sensor. It enables
the user to detect biosignals such as photoplethysmogram (PPG), electrocardiogram (ECG) and
galvanic skin resistance (GSR). PPG is the most used HRM method. It measures the pulse rate by
sampling light modulated by the blood vessels, which expand and contract as blood pulses through
them. ECG is the reference for any measurement of the biopotential generated by the heart.
Compared to the previous ams-OSRAM biosignal sensor generation, AS7050 is a biosignal converting
unit. The AS7050 provides up to 8 LED driver outputs, samples up to 6 photodiode inputs and
supports external electrodes. This enables the highest flexibility for several LED and photodiode
arrangements in different applications. Furthermore, the AS7050 Biosignal Sensor Analog Frontend
provides 2 ADC channels for simultaneous PPG and ECG measurements and an automatic
photodiode offset control.
The embedded ECG analog front-end satisfies IEC 60601-2-47 requirements.
The AS7050’s low-power design and small form factor are particularly well suited to application in
fitness bands, smartwatches, sports watches, smart patches and earbuds. In these cases, board
space is limited, and users look for extended, multi-day intervals between battery recharges. Thin
package dimension makes the AS7050 suitable for height constrained solution likes earbuds
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1.1
AS7050
General Description
Key Benefits & Features
The benefits and features of AS7050, Analog Frontend for Vital Sign Monitoring are listed below:
Figure 1:
Added Value of Using AS7050
1.2
Benefits
Features
High flexible LED/photodiode configuration.
Up to 8 LED drivers and 6 photodiode input pins.
Allows smallest application size e.g. narrow
HRM measurement band.
Small Wafer-Level-Chip-Scale-Package
(WLCSP).
Electrocardiogram ECG with dry electrodes.
Embedded low noise analog front-end for ECG
signals acquisition.
Enables blood pressure measurements.
Synchronized PPG and ECG acquisition.
Excellent HRM measurement quality.
Low noise analog front-end for PPG acquisition
Additional information for end user.
Analog electrical front-end (e.g. for temperature
sensing using a NTC or galvanic skin resistivity
(GSR)).
Long operating time.
Hardware sequencer to offload processor.
Adjustable LED driver with current control.
Ready for blood oxygen measurement
2 PPG channels useable in simultaneous mode
available
Acquiring several bio signals in parallel
ECG and PPG channels separated and
simultaneous useable
Applications
●
●
●
●
●
●
●
●
Optical sensor platform
Fitness band
Smart watch
Smart patches
Heart rate monitor
Hearables
ECG monitoring
Cuff-less blood pressure measurements
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1.3
AS7050
General Description
Block Diagram
The functional blocks of this device are shown below:
Figure 2 :
Functional Blocks of AS7050
AS7050
PD
MUX
PPG 19 bits ADC
INT
DC/AMB
COMP
TIA/INT
INN
INP
RLD
ADC
19 bits
ECG AFE
SEQ
LED7
LED8
LED5
LED6
LED4
LED2
LED3
LED1
CTRL
Clock
Gen
8 x LED Driver
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FIFO
I2C_SCL/CLK
I2C_SDA/SDI
SDO
CS
INT
CLK/
SYNC
PD1
PD2
PD3
PD4
PD5
PD6
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2
AS7050
Ordering Information
Ordering Information
Ordering Code
Package
Marking
Delivery Form
Delivery Quantity
AS7050-BWLM
WLCSP
n.a.
Tape & Reel
500 pcs/reel
AS7050-BWLT
WLCSP
n.a.
Tape & Reel
10000 pcs/reel
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3
AS7050
Absolute Maximum Ratings
Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to
the device. These are stress ratings only. Functional operation of the device at these or any other
conditions beyond those indicated under “Operating Conditions” is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Figure 3
Absolute Maximum Ratings of AS7050
Symbol
Parameter
Min
Max
Unit
Comments
Electrical
Parameters
VDD
Digital Supply Voltage
1.98
V
VDDA
Analog Supply Voltage
1.98
V
VDDIO
IO Supply Voltage
6
V
VGNDA-PGND
Analog to Power Ground Voltage
Difference
±0.3
V
VGNDA-GND
Analog to Digital Ground Voltage
Difference
±0.3
V
ISCR
Input Current (latch-up immunity)
ILEDON
Average LED ON Current
±100
35
mA
Norm: JEDEC JESD78
Connect specified
capacitor on SIGREF and
V_LDO during latch-up
test.
mA
DC current with all LEDs
ON during all time slots
kV
JS-001-2017
Electrostati
c Discharge
ESDHBM
Electrostatic Discharge HBM
±2.0
Temperatur
e Ranges
and Storage
Conditions
TSTRG
Storage Temperature Range
-40
TAMB
Operating Free-air Temperature
-30
TBODY
Package Body Temperature
RHNC
Relative Humidity (non-condensing)
MSL
Moisture Sensitivity Level
(1)
5
1
125
°C
85
°C
260
°C
85
%
IPC/JEDEC J-STD-020 (1)
Maximum floor life time
unlimited @ 30°C/85%
RHmax
The reflow peak soldering temperature (body temperature) is specified according to IPC/JEDEC J-STD-020
“Moisture/Reflow Sensitivity Classification for Non-hermetic Solid State Surface Mount Devices.”
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4
AS7050
Electrical Characteristics
Electrical Characteristics
All limits are guaranteed. The parameters with Min and Max values are guaranteed with production
tests or SQC (Statistical Quality Control) methods.
Figure 4:
Electrical Characteristics of AS7050
Symbol
Parameter
VDD
VDDA
Conditions
Min
Typ
Max
Unit
Supply
voltage
1.7
1.8
1.98
V
Analog
positive
supply
voltage
1.7
1.8
1.98
V
VDD
3.3
6
V
4
MHz
VDDIO
fEXTCLK
External
clock
frequency
fSampling,ECG
Sampling
frequency
8
kHz
fSampling,PPG
Sampling
frequency
1
kHz
IOS
DAC offset
current full
scale range
128
µA
CPD
Total
photodiode
capacitance
connected
0 V reserve voltage
300
pF
Photo current
input
RTIA (TIA gain)
values 9.375 k1.2 M;
(∑ signal range 1 µA64 µA)
0
64
µA
Input signal
ECG
Max ECG input signal
according to IEC
60601-2-47, chapter
201.12.4.4.101
-10
10
mV
2
Photodiode
IPD
60
ECG
VIN_SIG
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Symbol
AS7050
Electrical Characteristics
Parameter
Conditions
Min
Input DC
offset
Max ECG DC Offset
voltage according to
IEC60601-2-47,
chapter
201.12.4.4.101
-300
VNoise, p-v
Input-related
peak to
valley noise
Measured at the
output of ECG
amplifier in the
frequency range of fIN
according to IEC
60601-2-47, chapter
201.12.4.4.106
RIN
Input
Impedance
According to IEC
60601-2-47, chapter
201.12.4.4.102
100
MΩ
ECG_CR
ECG
conversion
rate
19-bit resolution
8
kSps
ECG_P_TOTAL
Power
consumption
5
mA
ECG_RES
ECG
Resolution
ECG_ENOB
ENOB
17
bits
VECGADC_REFP
Positive
reference
voltage
1.6
V
VIN_DC_OFF
Typ
Max
Unit
300
mV
50
µV
ECG-MODE
DSM Interface
19
bits
LED Driver
LED pad
voltage
5
V
ILED
Allowed
operating
LED output
current
300
mA
VCompl_1
Compliance
voltage
0.85
V
ILED
Allowed
operating
LED output
current
50
mA
VCompl_1
Compliance
voltage
0.3
V
VLED
LED Driver 1-6
LED Driver 7-8
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Symbol
AS7050
Electrical Characteristics
Parameter
Conditions
Min
Typ
Max
Unit
VECG_VCM
Reference
voltage
at T=27 °C
0.8
V
VREF_ADC
Reference
voltage
Trimmed reference
voltage, at T=27 °C
1.6
V
VPPG_VCM
Reference
voltage
at T=27 °C
0.8
V
TSEN_OUT
Temperature
sensor output
voltage
At room temperature
636
mV
TSEN_TK
Temperature
sensor
temperature
coefficient of
the output
voltage
-40 °C to 105 °C
-2.03
mV/°C
1.6
V
Reference
Block
Analog Front End
VOUT_DAC
Output
voltage DAC
VOUT_AFE
Output
voltage range
AFE
RRANGE
Bias resistor
trimming
range
CGPIO
Load
capacitance
GPIO1/2
0.3
Across process and
voltage corners, 25 °C
1.4
V
kΩ
500
50
pF
5.5
V
LDO
VLDO
HV power supply
2.3
VLDO1V8
Output
voltage
Output voltage in
operating mode
1.8
V
CLDO
Output
capacitance
External blocking
capacitance
1
µF
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5
AS7050
Package Drawings & Markings
Package Drawings & Markings
Figure 5:
Package Outline Drawing
(2)
(3)
(4)
(5)
All dimensions are in micrometers. Angles in degrees.
Dimensioning and tolerancing conform to ASME Y14.5M-1994.
This package contains no lead (Pb).
This drawing is subject to change without notice.
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6
AS7050
Tape & Reel Information
Tape & Reel Information
Figure 6:
Tape Dimensions
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AS7050
Soldering & Storage Information
Soldering & Storage Information
Figure 7:
Solder Reflow Profile Graph
Figure 8:
Solder Reflow Profile
Parameter
Reference
Average temperature gradient in preheating
Device
2.5 °C/s
Soak time
tsoak
2 to 3 minutes
Time above 217 °C (T1)
t1
Max 60 s
Time above 230 °C (T2)
t2
Max 50 s
Time above Tpeak – 10 °C (T3)
t3
Max 10 s
Peak temperature in reflow
Tpeak
260 °C
Temperature gradient in cooling
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AS7050
Revision Information
Revision Information
Document Status
Product Status
Definition
Product Preview
Pre-Development
Information in this datasheet is based on product ideas in the planning phase
of development. All specifications are design goals without any warranty and
are subject to change without notice
Preliminary Datasheet
Pre-Production
Information in this datasheet is based on products in the design, validation or
qualification phase of development. The performance and parameters shown
in this document are preliminary without any warranty and are subject to
change without notice
Datasheet
Production
Information in this datasheet is based on products in ramp-up to full production
or full production which conform to specifications in accordance with the terms
of ams AG standard warranty as given in the General Terms of Trade
Datasheet
(discontinued)
Discontinued
Information in this datasheet is based on products which conform to
specifications in accordance with the terms of ams AG standard warranty as
given in the General Terms of Trade, but these products have been
superseded and should not be used for new designs
Changes from previous version to current revision v3-00
●
●
Page
Page and figure numbers for the previous version may differ from page and figure numbers in the current revision.
Correction of typographical errors is not explicitly mentioned.
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AS7050
Legal Information
Legal Information
Copyrights & Disclaimer
Copyright ams AG, Tobelbader Strasse 30, 8141 Premstaetten, Austria-Europe. Trademarks Registered. All rights reserved.
The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the
copyright owner.
Devices sold by ams AG are covered by the warranty and patent indemnification provisions appearing in its General Terms of
Trade. ams AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein. ams
AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this
product into a system, it is necessary to check with ams AG for current information. This product is intended for use in
commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high
reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended
without additional processing by ams AG for each application. This product is provided by ams AG “AS IS” and any express or
implied warranties, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose are
disclaimed.
ams AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property
damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any
kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability
to recipient or any third party shall arise or flow out of ams AG rendering of technical or other services.
RoHS Compliant & ams Green Statement
RoHS Compliant: The term RoHS compliant means that ams AG products fully comply with current RoHS directives. Our
semiconductor products do not contain any chemicals for all 6 substance categories plus additional 4 substance categories (per
amendment EU 2015/863), including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where
designed to be soldered at high temperatures, RoHS compliant products are suitable for use in specified lead-free processes.
ams Green (RoHS compliant and no Sb/Br/Cl): ams Green defines that in addition to RoHS compliance, our products are free
of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
and do not contain Chlorine (Cl not exceed 0.1% by weight in homogeneous material).
Important Information: The information provided in this statement represents ams AG knowledge and belief as of the date that
it is provided. ams AG bases its knowledge and belief on information provided by third parties, and makes no representation or
warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. ams AG
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