AS7050 AMSOSRAM | Alldatasheet
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Technical content
Analog Frontend for Vital Sign Monitoring v1-00 • 2022-Mar-31
Short Datasheet • PUBLIC DS001051 • v1-00 • 2022-Mar-31 19 │ 2 Content Guide 5 Package Drawings & Markings .. 15
7 Soldering & Storage Information 17
Short Datasheet • PUBLIC DS001051 • v1-00 • 2022-Mar-31 19 │ 3
1 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 solutions like earbuds.
Short Datasheet • PUBLIC DS001051 • v1-00 • 2022-Mar-31 19 │ 4
1.1 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 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. Good 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
1.2 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 Block Diagram
The functional blocks of this device are shown below: Figure 2 : Functional Blocks of AS7050 PD SELECTION Reference Block EXTCLK PD3 ECG Amplifier PD4 PD5 PD6 PD Offset PPG - ADC Current Input TIA PDREF ECG_INP ECG_INN ECG_REF Leads off detect Leakage compens ation ECG_REF AMP ECG_Amplifier Block LED Driver 2x LED1 LED2 LED3 PGND LED4 LED5 LED6 ECG - ADC Voltage Input ECG ADC INPUT SELECTION ECG_VCM SCL SDA_MOSI MISO CSXN INT LDO LDO VDDA VLDO LDO_EN VDD Analog Supply (1.8V) Digital Supply (1.8V) GNDA GND PPG_VCM REF_ADC POR OSC
10 BIT
Analog Front End (AFE) Clock Source Selection VDDIO 1.8V 3.3V From µC VLED from/ to µC to µC ECG Electrodes 2x10M 10µ 2µ2µ AS7050 PD1 PD2 LED7_GPIO1 LED8_GPIO2 VLED GPIO1, GPIO2 PPG Filter FIFO 1.5kByte I2C / SPI Interface Over- sampling Over- sampling Sequencer CONFIG TIA CONFIG REF CONFIG ECG CONFIG DIGITAL CONFIG TEMP CONFIG PPG CONFIG AFE RAM Filter Interrupt Logic Clock/Reset Logic Config LED OTP Digital ECG Filter Config PD Synchro- nisation I/O Control Over- sampling
19 Bit
24 Bit
8 Bit
Ordering Information
Short Datasheet • PUBLIC DS001051 • v1-00 • 2022-Mar-31 19 │ 6
2 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
Short Datasheet • PUBLIC DS001051 • v1-00 • 2022-Mar-31 19 │ 7
3 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: 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 VIN Input Pin Voltage to Ground pins GPIO1/2 -0.3 VDDIO+0.3 V max. 6 V V Internal diode to VDDIO VIN-OTHER Input Pin Voltage to Ground pins SCL/SDA_MOSI/MISO/CSXN/IN T/EXTCLK -0.3 VDDIO+0.3 V max. 6 V V internal diode to VDDIO VLDO_EN Input Pin Voltage to Ground pins LDO_EN -0.3 VLDO+0.3 V max. 6 V V internal diode to VLDO VVD1/2/3/4/5/6 Voltage at Pins VD1,VD2,VD3,VD4,VD5,VD6 6 V VVD7/8_ INTERNAL Voltage Between Internal Pin of VD7-VD8 to GND VDDIO+0.3 V V Internal diode between current source (internal node at anode of the LED if the pin has an LED otherwise VD7/8 pin) and VDDIO VIN-LDO1 Input Pin Voltage to Ground for pin V_LDO -0.3 6 V EN_LDO > 1.3 V VIN-LDO2 Input Pin Voltage to Ground for pin V_LDO -0.3 VDD+0.3 V max. 2 V V EN_LDO = 0 V Diode to VDD and VDDA VIN-VDDA_DIODE Input Pin Voltage to Ground pins for ECG_INP/ECG_INN/ECG_REF/ ECG_VCM/PPG_VCM/REF_AD C/PD1/PD2/PD3/PD4/PD5/PD6/ PDREF -0.3 VDDA+0.3 V max. 2 V V Diode to VDDA 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) ±100 mA JEDEC JESD78 Connect specified capacitor on SIGREF and V_LDO during latch-up test. ILEDON Average LED ON Current 35 mA DC current with all LEDs ON during all 8 time slots(2)
Short Datasheet • PUBLIC DS001051 • v1-00 • 2022-Mar-31 19 │ 8 Symbol Parameter Min Max Unit Comments Electrostatic Discharge ESDHBM Electrostatic Discharge HBM ±2.0 kV JS-001-2017 Temperature Ranges and Storage Conditions TSTRG Storage Temperature Range -40 125 °C TAMB Operating Free-air Temperature -30 85 °C RHNC Relative Humidity (non- condensing) 5 85 % MSL Moisture Sensitivity Level 1 Maximum floor life time unlimited @ 30°C/85% RHmax (1) 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.” (2) The minimal time slot time is 125 µs. It defines the time when you can start next sub-sample conversion. 8 sub-samples forming one sample. Within one sample you can chose any combination of LED and PD (e.g. sub-sample 1: LED1 and PD 3, subsample 2: LED3 and PD2 ….). Also if one subsample is completed in 32 µs you cannot start the next subsample immediately, you need to wait the beginning of new time slot (which is 125 µs after beginning of sub-sample start).
Electrical Characteristics
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4 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: Symbol Parameter Conditions Min Typ Max Unit VDD Supply voltage 1.7 1.8 1.98 V VDDA Analog positive supply voltage 1.7 1.8 1.98 V VDDIO VDD 3.3 6 V IDDA Supply current in power down mode LDO_EN=0V, VLDO = VDDA 0.07 µA Supply current in idle mode lf_osc_on=1 0.07 µA Supply current PPG ADC active en_bg=1, en_vcm_ppg=1, en_bias=1, sel_opamp=0, ppg_en=1, ppg_mod_en=1, pll_on=1, hf_osc_on=1 9.55 mA Supply current ECG ADC active en_bg=1, en_vcm_ecg=1, en_ref=1, en_bias=1, sel_opamp=0, ecg_en=1, ecg_mod_en=1, ecg_ibuf_en=1, pll_on=1, hf_osc_on=1 5.55 mA Supply current ECG Amplifier active ecg_amp_en=1, ecg_ina1_en=1, ecg_ref_enable=1, ecg_ina2_en=1 0.26 mA
Short Datasheet • PUBLIC DS001051 • v1-00 • 2022-Mar-31 19 │ 10 Symbol Parameter Conditions Min Typ Max Unit Supply current TIA active tia_en = 1 1.39 mA Supply current AFE active afe_dac_en = 1, afe_dac_buf_en=1, afe_gain_stage_en=1, afe_ref_buf_en=1 114.7 µA IVDD Supply current in power down mode LDO_EN=0V, VLDO = VDDA 1.1 µA Supply current in idle mode lf_osc_on=1 2.92 µA Supply current PPG ADC active en_bg=1, en_vcm_ppg=1, en_bias=1, sel_opamp=0, ppg_en=1, ppg_mod_en=1, pll_on=1, hf_osc_on=1 0.80 mA Supply current ECG ADC active en_bg=1, en_vcm_ecg=1, en_ref=1, en_bias=1, sel_opamp=0, ecg_en=1, ecg_mod_en=1, ecg_ibuf_en=1, pll_on=1, hf_osc_on=1 0.80 mA IVDDIO Supply current in power down mode LDO_EN=0V, VLDO = VDDA 0.14 µA fEXTCLK External clock frequency 2 4 MHz fSampling,ECG Sampling frequency 8 kHz fSampling,PPG Sampling frequency 1 kHz Photodiode IOS DAC offset current full scale range ppg_ios_fs=0 1 µA ppg_ios_fs=1 2 ppg_ios_fs=2 4
Short Datasheet • PUBLIC DS001051 • v1-00 • 2022-Mar-31 19 │ 11 Symbol Parameter Conditions Min Typ Max Unit ppg_ios_fs=3 8 ppg_ios_fs=4 16 ppg_ios_fs=5 32 ppg_ios_fs=6 64 ppg_ios_fs=7 128 CPD Total photodiode capacitance connected to PPG_ADC
0 V reserve voltage 60 300 pF
RTIA (TIA gain) values 9.375 k-
1.2 M;
(∑ signal range 1 µA- 64 µA) 0 64 µA ECG VIN_SIG Input signal ECG Max ECG input signal according to IEC 60601-2-47, chapter 201.12.4.4.101 -10 10 mV VIN_DC_OFF Input DC offset Max ECG DC Offset voltage according to IEC60601-2-47, chapter 201.12.4.4.101 -300 300 mV 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 50 µV RIN Input Impedance According to IEC 60601-2-47, chapter 201.12.4.4.102 100 MΩ VECG_REF ECG_REF voltage ecg_ref_enable = 1 0.8 V VECG_ref_in ECG Ref Input voltage Input from reference block 0.8 V ECG-MODE DSM Interface ECG_CR ECG conversion rate 19-bit resolution 8 kSps ECG_P_TOTAL Power consumption 5 mA
Short Datasheet • PUBLIC DS001051 • v1-00 • 2022-Mar-31 19 │ 12 Symbol Parameter Conditions Min Typ Max Unit ECG_RES ECG Resolution 19 bits ECG_ENOB ENOB 17 bits VECGADC_REFP Positive reference voltage 1.6 V LED Driver VLED LED pad voltage 5 V LED Driver 1-6 ILED Allowed operating LED output current led_ictrl = 127 150.00 mA led_ictrl = 255 300.00 mA VCompl_1 Compliance voltage led_ictrl = 0 … 127 0.3 V led_ictrl = 128 … 255 0.85 V LED Driver 7-8 ILED Allowed operating LED output current led_ictrl = 128 50.00 mA VCompl_1 Compliance voltage led_ictrl = 0 … 127 0.3 V Reference Block VECG_VCM Reference voltage SEL_REF=0, at T=27 °C 0.8 V VREF_ADC Reference voltage Trimmed reference voltage, SEL_REF=0, at T=27 °C 1.6 V VPPG_VCM Reference voltage SEL_REF=0, 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
Short Datasheet • PUBLIC DS001051 • v1-00 • 2022-Mar-31 19 │ 13 Symbol Parameter Conditions Min Typ Max Unit Analog Front End VOUT_DAC Output voltage DAC dac_value<9:0> 0x3FF REF_ADC=1.6 V 1.6 V VOUT_AFE Output voltage range AFE 0.3 1.4 V RRANGE Bias resistor trimming range Across process and voltage corners, 25 °C 500 kΩ CGPIO Load capacitance GPIO1/2 50 pF LDO VLDO HV power supply if LDO_EN >1.26 V 2.3 5.5 V if LDO_EN < 0.56 V VDD V VLDO1V8 Output voltage Output voltage in operating mode 1.8 V CLDO Output capacitance External blocking capacitance 1 µF GPIO VIH Input high Switching threshold while rising edge of input signal is introduced 0.54 1.26 V VIL Input low Switching threshold while falling edge of input signal is introduced 0.54 1.26 V VOH Output high Pin’s source load current is 2 mA condition: E2=E4=”1” (full available driver strength) VDDIO-0.4 V VOL Output low Pin’s sink load current is 2 mA condition: E2=E4=”1” (full available driver strength) 0.4 V SDA_MOSI, SCL, EXTCLK, CSXN, IFSEL, LDO_EN VIH Input high Switching threshold while rising edge of input signal is introduced 0.54 1.26 V
Short Datasheet • PUBLIC DS001051 • v1-00 • 2022-Mar-31 19 │ 14 Symbol Parameter Conditions Min Typ Max Unit VIL Input low Switching threshold while falling edge of input signal is introduced 0.54 1.26 V fClock_SPI SPI clock frequency 10 MHz SDA_MOSI, MISO VOH Output high Pin’s source load current is 6 mA condition: E2=E4=”1” (full available driver strength) VDDIO-0.4 V VOL Output low Pin’s sink load current is 6 mA condition: E2=E4=”1” (full available driver strength) 0.4 V INT VOH Output high Pin’s source load current is 2 mA condition: E2=E4=”1” (full available driver strength) VDDIO-0.4 V VOL Output low Pin’s sink load current is 2 mA condition: E2=E4=”1” (full available driver strength) 0.4 V
Package Drawings & Markings Short Datasheet • PUBLIC DS001051 • v1-00 • 2022-Mar-31 19 │ 15
5 Package Drawings & Markings
Figure 5: Package Outline Drawing (1) All dimensions are in micrometers. Angles in degrees. (2) Dimensioning and tolerancing conform to ASME Y14.5M-1994. (3) This package contains no lead (Pb). (4) This drawing is subject to change without notice.
Tape & Reel Information Short Datasheet • PUBLIC DS001051 • v1-00 • 2022-Mar-31 19 │ 16
6 Tape & Reel Information
Figure 6: Tape Dimensions
Soldering & Storage Information Short Datasheet • PUBLIC DS001051 • v1-00 • 2022-Mar-31 19 │ 17
7 Soldering & Storage Information
Figure 7: Solder Reflow Profile Graph Figure 8: Solder Reflow Profile Parameter Reference Device Average temperature gradient in preheating 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 Max −5 °C/s
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8 Revision Information
Changes from previous version to current revision v1-00 Page This short datasheet is derived from v3-00 of full datasheet
- 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.
Short Datasheet • PUBLIC DS001051 • v1-00 • 2022-Mar-31 19 │ 19
9 Legal Information
Copyrights & Disclaimer Copyright ams-OSRAM 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-OSRAM AG are covered by the warranty and patent indemnification provisions appearing in its General Terms of Trade. ams-OSRAM AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein. ams-OSRAM 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-OSRAM 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-OSRAM AG for each application. This product is provided by ams-OSRAM 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-OSRAM 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 obligat ion or liability to recipient or any third party shall arise or flow out of ams-OSRAM AG rendering of technical or other services. RoHS Compliant & ams Green Statement RoHS Compliant: The term RoHS compliant means that ams-OSRAM 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-OSRAM AG knowledge and belief as of the date that it is provided. ams-OSRAM 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-OSRAM AG has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ams-OSRAM AG and ams-OSRAM AG suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. Headquarters ams-OSRAM AG Tobelbader Strasse 30
8141 Premstaetten
Austria, Europe Tel: +43 (0) 3136 500 0 Please visit our website at www.ams.com Buy our products or get free samples online at www.ams.com/Products Technical Support is available at www.ams.com/Technical-Support Provide feedback about this document at www.ams.com/Document-Feedback For sales offices, distributors and representatives go to www.ams.com/Contact For further information and requests, e-mail us at ams_sales@ams.com