MAX30004CWV+T

MAX30004 Ultra-Low Power, Single-Channel Integrated Biopotential (R-to-R Detection) AFE General Description Benefits and Features The biopotential channel has ESD protection, EMI filtering, internal lead biasing, DC leads-off detection, ultra-low power leads-on detection during standby mode. Soft powerup sequencing ensures no large transients are injected into the electrodes. The biopotential channel also has high input impedance, low noise, high CMRR, programmable gain, various low-pass and high-pass filter options, and a high resolution analog-to-digital converter. The biopotential channel is DC coupled, can handle large electrode voltage offsets, and has a fast recovery mode to quickly recover from overdrive conditions, such as defibrillation and electrosurgery. ●● Clinical-Grade Biopotential AFE with High-Resolution Data Converter • 15.5 Bits Effective Resolution with 5µVP-P Noise The MAX30004 is a complete, biopotential, analog frontend solution for wearable applications. It offers high performance for clinical and fitness applications, with ultra-low power for long battery life. The MAX30004 is a single biopotential channel providing heart rate detection. The MAX30004 is available in a 28-pin TQFN and 30-bump wafer-level package (WLP), operating over the 0°C to +70°C commercial temperature range. Applications ●● Single Lead Wireless Patches for At-Home/ In-Hospital Monitoring ●● Chest Band Heart Rate Monitors for Fitness Applications Ordering Information appears at end of data sheet. ●● Heart Rate Detection with Interrupt Feature Eliminates the Need to Extract and Process the ECG Data on the Microcontroller • Robust R-R Detection in High Motion Environment at Extremely Low Power ●● Better Dry Starts Due to Much Improved Real World CMRR and High Input Impedance • Fully Differential Input Structure with CMRR > 100dB ●● Offers Better Common-Mode to Differential Mode Conversion Due to High Input Impedance • High Input Impedance > 500MΩ for Extremely Low Common-to-Differential Mode Conversion ●● Minimum Signal Attenuation at the Input During Dry Start Due to High Electrode Impedance ●● High DC Offset Range of ±650mV (1.8V, typ) Allows to Be Used with Wide Variety of Electrodes ●● High AC Dynamic Range of 65mVP-P Will Help the AFE Not Saturate in the Presence of Motion/Direct Electrode Hits ●● Longer Battery Life Compared to Competing Solutions • 85µW at 1.1V Supply Voltage ●● Leads-On Interrupt Feature Keeps µC in Deep Sleep Mode with RTC Off Until Valid Lead Condition is Detected • Lead-On Detect Current: 0.7µA (typ) ●● Configurable Interrupts Allows the µC Wake-Up Only on Every Heart Beat Reducing the Overall System Power ●● High-Speed SPI Interface ●● Shutdown Current of 0.5µA (typ) 19-8732; Rev 0; 12/16 MAX30004 Ultra-Low Power, Single-Channel Integrated Biopotential (R-to-R Detection) AFE Functional Diagram AVDD DVDD OVDD MAX30004 BIOPOTENTIAL CHANNEL CSB INP INN AAF ESD , EMI , INPUT MUX , DC LEAD CHECK INPUT AMP f-3dB =600 Hz 18-BIT ΣΔ ADC PGA R-TO-R DETECTOR DECIMATION FILTER SDI 14 -BIT SCLK SPI INTERFACE AND REGISTERS -40dB/dec FAST SETTLING SDO INTB CAPP INT2B CAPN SUPPORT CIRCUITRY COMMON -MODE BUFFER REFERENCE BUFFER fCLK BANDGAP AGND www.maximintegrated.com VCM BIASING VBG VREF PLL CPLL SEQUENCER FCLK fHFC DGND Maxim Integrated │  2 MAX30004 Ultra-Low Power, Single-Channel Integrated Biopotential (R-to-R Detection) AFE Absolute Maximum Ratings AVDD to AGND......................................................-0.3V to +2.0V DVDD to DGND.....................................................-0.3V to +2.0V AVDD to DVDD.......................................................-0.3V to +0.3V OVDD to DGND.....................................................-0.3V to +3.6V AGND to DGND....................................................-0.3V to +0.3V CSB, SCLK, SDI, FCLK to DGND........................-0.3V to +3.6V SDO, INTB, INT2B to DGND..............-0.3V to the lower of (3.6V and OVDD + 0.3V) All other pins to AGND...............-0.3V to the lower of (2.0V and AVDD + 0.3V) Maximum Current into Any Pin.........................................±50mA Continuous Power Dissipation (TA = +70°C) 28-Pin TQFN (derate 34.5mW/°C above +70°C)....2758.6mW 30-Bump WLP (derate 24.3mW/°C above +70°C)......................................................1945.5mW Operating Temperature Range................................0°C to +70°C Junction Temperature.......................................................+150°C Storage Temperature Range............................. -65°C to +150°C Lead Temperature (Soldering, 10sec).............................. +300°C Soldering Temperature (reflow)........................................+260°C Package Thermal Characteristics (Note 1) TQFN Junction-to-Ambient Thermal Resistance (θJA)...........29°C/W Junction-to-Case Thermal Resistance (θJC)..................2°C/W WLP Junction-to-Ambient Thermal Resistance (θJA)...........44°C/W Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics (VDVDD = VAVDD = +1.1V to +2.0V, VOVDD = +1.65V to +3.6V, fFCLK = 32.768kHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDVDD = VAVDD = +1.8V, VOVDD = +2.5V, TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN VAVDD = +1.1V, THD < 0.3% -15 TYP MAX UNITS BIOPOTENTIAL CHANNEL AC Differential Input Range VAVDD = +1.8V, THD < 0.3% VAVDD = +1.1V, shift from nominal gain < 2% DC Differential Input Range Common Mode Input Range Common Mode Rejection Ratio ±32.5 -300 VAVDD = +1.8V VAVDD = +1.1V, from VMID, shift from nominal gain < 2% 0W source impedance, f = 64Hz (Note 3) -150 105 BW = 0.05 - 40Hz, GCH = 20x (Note 3) www.maximintegrated.com Common-mode, DC Differential, DC +150 115 dB 77 Input Referred Noise Input Impedance (INA) mV mV (Note 4) TA = +25°C mVp-p ±550 BW = 0.05 - 150Hz, GCH = 20x Input Leakage Current +300 ±650 VAVDD = +1.8V, from VMID, shift from nominal gain < 2% CMRR +15 -1 0.82 µVRMS 5.4 µVp-p 0.53 1.0 µVRMS 3.5 6.6 µVp-p 0.1 +1 nA 45 GΩ 1500 MΩ Maxim Integrated │  3 MAX30004 Ultra-Low Power, Single-Channel Integrated Biopotential (R-to-R Detection) AFE Electrical Characteristics (continued) (VDVDD = VAVDD = +1.1V to +2.0V, VOVDD = +1.65V to +3.6V, fFCLK = 32.768kHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDVDD = VAVDD = +1.8V, VOVDD = +2.5V, TA = +25°C.) (Note 2) PARAMETER Total Harmonic Distortion Gain Setting SYMBOL THD GCH Gain Error Offset Error CONDITIONS MIN VAVDD = +1.80V, VIN = 65mVp-p, FIN = 64Hz, GCH = 20x, electrode offset = ±300mV 0.3 20 to 160 Programmable, see Register Map Analog High-Pass Filter Slew Current -2.5 +2.5 % VAVDD = +1.1V, GCH = 20x, INP = INN = VMID -4.5 +4.5 % FHP = 1/(2R x RHPF x CHPF), CHPF = capacitance between CAPP and CAPN 320 0.1 % of FSR 18 Bits 125 to 512 SPS 450 Fast recovery enabled (1.8V) 160 Fast recovery enabled (1.1V) 55 Fast recovery disabled 0.09 Fast Settling Recovery Time CHPF = 10µF 500 Digital Low Pass Filter Linear phase FIR filter. Digital High Pass Filter Power Supply Rejection PSRR V/V VAVDD = +1.8V, GCH = 20x, INP = INN = VMID Programmable, see Register Map RHPF UNITS % VAVDD = +1.1V, VIN = 30mVp-p, FIN = 64Hz, GCH = 20x, electrode offset = ±300mV ADC Resolution CAPP to CAPN Impedance MAX 0.025 (Note 5) ADC Sample Rate TYP DLPF[0:1] = 01 40 DLPF[0:1] = 10 100 DLPF[0:1] = 11 150 Phase-corrected 1st-order IIR filter. DHPF = 1 0.5 Lead bias disabled, DC 107 Lead bias disabled, fSW = 64Hz 110 600 kΩ µA ms Hz Hz dB INPUT MUX DC Lead Off Check www.maximintegrated.com Pullup/ pulldown DCLOFF_IMAG[2:0] = 001 5 DCLOFF_IMAG[2:0] = 010 10 DCLOFF_IMAG[2:0] = 011 20 DCLOFF_IMAG[2:0] = 100 50 DCLOFF_IMAG[2:0] = 101 100 nA Maxim Integrated │  4 MAX30004 Ultra-Low Power, Single-Channel Integrated Biopotential (R-to-R Detection) AFE Electrical Characteristics (continued) (VDVDD = VAVDD = +1.1V to +2.0V, VOVDD = +1.65V to +3.6V, fFCLK = 32.768kHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDVDD = VAVDD = +1.8V, VOVDD = +2.5V, TA = +25°C.) (Note 2) PARAMETER SYMBOL DC Lead Off Comparator Low Threshold DC Lead Off Comparator High Threshold VMID MIN TYP MAX DCLOFF_VTH[1:0] = 11 (Note 6) VMID - 0.50 DCLOFF_VTH[1:0] = 10 (Note 7) VMID - 0.45 DCLOFF_VTH[1:0] = 01 (Note 8) VMID - 0.40 DCLOFF_VTH[1:0] = 00 VMID - 0.30 DCLOFF_VTH[1:0] = 11 (Note 6) VMID + 0.50 DCLOFF_VTH[1:0] = 10 (Note 7) VMID + 0.45 DCLOFF_VTH[1:0] = 01 (Note 8) VMID + 0.40 DCLOFF_VTH[1:0] = 00 VMID + 0.30 Lead bias enabled Lead Bias Impedance Lead Bias Voltage CONDITIONS RBIASV[1:0] = 00 50 RBIASV[1:0] = 01 100 RBIASV[1:0] = 10 200 Lead bias enabled UNITS V V MΩ VAVDD/ 2.15 V 0.650 V 100 kΩ INTERNAL REFERENCE/COMMON-MODE VBG Output Voltage VBG VBG Output Impedance External VBG Compensation Capacitor CVBG VREF Output Voltage VREF VREF Temperature Coefficient TCREF 1 TA = +25°C 0.995 TA = 0°C to +70°C VREF Buffer Line Regulation VREF Buffer Load Regulation ILOAD = 0 to 100µA External VREF Compensation Capacitor CREF VCM Output Voltage VCM External VCM Compensation Capacitor CCM 1 1 µF 1.000 1.005 V 10 ppm/°C 330 µV/V 25 µV/µA 10 µF 0.650 V 10 µF DIGITAL INPUTS (SDI, SCLK, CSB, FCLK) Input-Voltage High VIH Input-Voltage Low VIL Input Hysteresis www.maximintegrated.com VHYS 0.7 × VOVDD V 0.3 × VOVDD 0.05 × VOVDD V V Maxim Integrated │  5 MAX30004 Ultra-Low Power, Single-Channel Integrated Biopotential (R-to-R Detection) AFE Electrical Characteristics (continued) (VDVDD = VAVDD = +1.1V to +2.0V, VOVDD = +1.65V to +3.6V, fFCLK = 32.768kHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDVDD = VAVDD = +1.8V, VOVDD = +2.5V, TA = +25°C.) (Note 2) PARAMETER SYMBOL Input Capacitance CIN Input Current IIN CONDITIONS MIN TYP MAX 10 -1 UNITS pF +1 µA DIGITAL OUTPUTS (SDO, INTB, INT2B) Output Voltage High VOH ISOURCE = 1mA Output Voltage Low VOL ISINK = 1mA Three-State Leakage Current VOVDD – 0.4 V -1 Three-State Output Capacitance 0.4 V +1 µA 15 pF POWER SUPPLY Analog Supply Voltage VAVDD Connect VAVDD to VDVDD 1.1 2.0 V Digital Supply Voltage VDVDD Connect VDVDD to VAVDD 1.1 2.0 V Interface Supply Voltage VOVDD Power for I/O drivers only 1.65 3.6 V 122 µA Supply Current IAVDD + IDVDD R-R Operation ULP Lead On Detect Interface Supply Current Shutdown Current VAVDD = VDVDD = +1.1V 76 VAVDD = VDVDD = +1.8V 100 VAVDD = VDVDD = +2.0V 110 TA = +70°C 0.98 TA = +25°C 0.73 VOVDD = +1.65V, ADC at 512sps (Note 9) 0.2 VOVDD = +3.6V, ADC at 512sps (Note 9) 0.6 ISAVDD + ISDVDD VAVDD = VDVDD = 2.0V TA = +70°C 0.79 TA = +25°C 0.51 ISOVDD VOVDD = +3.6V, VAVDD = VDVDD = +2.0V IOVDD 2.5 1.6 2.5 µA µA 1.1 ESD PROTECTION INP, INN www.maximintegrated.com IEC61000-4-2 Contact Discharge (Note 10) ±8 IEC61000-4-2 Air-Gap Discharge (Note 10) ±15 HMM ±8 kV Maxim Integrated │  6 MAX30004 Ultra-Low Power, Single-Channel Integrated Biopotential (R-to-R Detection) AFE Timing Characteristics (VDVDD = VAVDD = +1.1V to +2.0V, VOVDD = +1.65V to +3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDVDD = +1.8V, VOVDD = +2.5V, TA = +25°C.) (Notes 2, 3) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 12 MHz TIMING CHARACTERISTICS SCLK Frequency fSCLK 0 SCLK Period tCP 83 ns SCLK Pulse Width High tCH 15 ns SCLK Pulse Width Low tCL 15 ns CSB Fall to SCLK Rise Setup Time tCSS0 To 1st SCLK rising edge (RE) 15 ns CSB Fall to SCLK Rise Hold Time tCSH0 Applies to inactive RE preceding 1st RE 0 ns CSB Rise to SCLK Rise Hold Time tCSH1 Applies to 32nd RE, executed write 10 ns CSB Rise to SCLK Rise tCSA Applies to 32nd RE, aborted write sequence 15 ns SCLK Rise to CSB Fall tCSF Applies to 32nd RE 100 ns CSB Pulse-Width High tCSPW 20 ns SDI-to-SCLK Rise Setup Time tDS 8 ns SDI to SCLK Rise Hold Time tDH 8 ns SCLK Fall to SDO Transition tDOT SCLK Fall to SDO Hold tDOH CLOAD = 20pf CSB Fall to SDO Fall tDOE Enable time, CLOAD = 20pf www.maximintegrated.com CLOAD = 20pf 40 ns CLOAD = 20pf, VAVDD = VDVDD ≥ 1.8V, VDVDD ≥ 2.5V 20 ns 2 ns 30 ns Maxim Integrated │  7 MAX30004 Ultra-Low Power, Single-Channel Integrated Biopotential (R-to-R Detection) AFE Timing Characteristics (continued) (VDVDD = VAVDD = +1.1V to +2.0V, VOVDD = +1.65V to +3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDVDD = +1.8V, VOVDD = +2.5V, TA = +25°C.) (Notes 2, 3) PARAMETER SYMBOL CONDITIONS MIN CSB Rise to SDO Hi-Z tDOZ Disable time FCLK Frequency fFCLK External reference clock FCLK Period tFP FCLK Pulse-Width High tFH FCLK Pulse-Width Low tFL TYP MAX UNITS 35 ns 32.768 kHz 30.52 µs 50% duty cycle assumed 15.26 µs 50% duty cycle assumed 15.26 µs Note 2: Limits are 100% tested at TA = +25°C. Limits over the operating temperature range and relevant supply voltage range are guaranteed by design and characterization. Note 3: Guaranteed by design and characterization. Not tested in production. Note 4: One electrode drive with