Data Sheet

(V
DD
= 1.8V, V
LED+
= 5.0V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= 25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Dark Current Count LED_DCC
RED_PA = IR_PA = 0x00,
LED_PW = 0x03, SPO2_SR = 0x01
ADC_RGE = 0x02
30 128 Counts
0.01 0.05
% of
FS
DC Ambient Light Rejection
(Note 4)
ALR
ADC counts with nger on
sensor under direct sunlight
(100K lux), ADC_RGE
= 0x3, LED_PW = 0x03,
SPO2_SR = 0x01
Red
LED
2 Counts
IR
LED
2 Counts
ADC Count—PSRR (V
DD
) PSRRV
DD
1.7V < V
DD
< 2.0V,
LED_PW = 0x00, SPO2_SR = 0x05
T
A
= +25°C
0.25 1
% of
FS
Frequency = DC to 100kHz, 100mV
P-P
10 LSB
ADC Count—PSRR
(LED Driver Outputs)
PSRR
LED
3.6V < V
LED+
, < 5.0V, T
A
= +25°C 0.05 1
% of
FS
Frequency = DC to 100kHz,
100mV
P-P
10 LSB
ADC Clock Frequency CLK 10.2 10.48 10.8 MHz
ADC Integration Time
(Note 4)
INT
LED_PW = 0x00 69
µs
LED_PW = 0x01 118
LED_PW = 0x02 215
LED_PW = 0x03 411
Slot Timing (Timing Between
Sequential Channel Samples;
e.g., Red Pulse Rising Edge To
IR Pulse Rising Edge)
INT
LED_PW = 0x00 427
µs
LED_PW = 0x01 525
LED_PW = 0x02 720
LED_PW = 0x03 1107
COVER GLASS CHARACTERISTICS (Note 4)
Hydrolytic Resistance Class Per DIN ISO 719 HGB 1
IR LED CHARACTERISTICS (Note 4)
LED Peak Wavelength λ
P
I
LED
= 20mA, T
A
= +25°C 870 880 900 nm
Full Width at Half Max Δλ I
LED
= 20mA, T
A
= +25°C 30 nm
Forward Voltage V
F
I
LED
= 20mA, T
A
= +25°C 1.4 V
Radiant Power P
O
I
LED
= 20mA, T
A
= +25°C 6.5 mW
RED LED CHARACTERISTICS (Note 4)
LED Peak Wavelength λ
P
I
LED
= 20mA, T
A
= +25°C 650 660 670 nm
Full Width at Half Max Δλ I
LED
= 20mA, T
A
= +25°C 20 nm
Forward Voltage V
F
I
LED
= 20mA, T
A
= +25°C 2.1 V
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Maxim Integrated │ 3
MAX30105 High-Sensitivity Optical Sensor
for Smoke Detection Applications
Electrical Characteristics (continued)