Data Sheet

ADPD103

Rev. B | Page 7 of 52

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

SYSTEM PERFORMANCE

Total Output Noise Floor

25 kΩ; referred to ADC input

2.0

LSB rms

25 kΩ; referred to peak input signal for 2 µs LED pulse

4.6

nA rms

25 kΩ; referred to peak input signal for 3 µs LED pulse

3.3

nA rms

25 kΩ; saturation signal-to-noise ratio (SNR) per pulse

72.3

dB

50 kΩ; referred to ADC input

2.4

LSB rms

50 kΩ; referred to peak input signal for 2 µs LED pulse

2.8

nA rms

50 kΩ; referred to peak input signal for 3 µs LED pulse

2.0

nA rms

70.6

dB

100 kΩ; referred to ADC input

3.4

LSB rms

100 kΩ; referred to peak input signal for 2 µs LED pulse

1.9

nA rms

100 kΩ; referred to peak input signal for 3 µs LED pulse

1.4

nA rms

67.6

dB

200 kΩ; referred to ADC input

5.5

LSB rms

200 kΩ; referred to peak input signal for 2 µs LED pulse

1.6

nA rms

200 kΩ; referred to peak input signal for 3 µs LED pulse

1.1

nA rms

63.5

dB

DC Power Supply Rejection Ratio (DC PSRR)

−37

dB

1

This saturation level applies to the ADC only and, therefore, includes only the pulsed signal. Any nonpulsatile signal is removed prior to the ADC stage.

2

ADC resolution is listed per pulse when the AFE offset is correctly compensated per the AFE Operation section. If using multiple pulses, divide by the number of pulses.

3

This saturation level applies to the full signal path and, therefore, includes both the ambient signal and the pulsed signal.

4

The noise term of the saturation SNR value refers to the receive noise only and does not include photon shot noise or any noise on the LED signal itself.

DIGITAL SPECIFICATIONS

DVDD = 1.7 V to 1.9 V, unless otherwise noted.

Table 5.

Parameter

Symbol

Test Conditions/Comments

Min

Typ

Max

Unit

LOGIC INPUTS (SCL, SDA)

Input Voltage Level

High

0.7 × DVDD

3.6

V

Low

0.3 × DVDD

V

Input Current Level

High

−10

+10

µA

Low

−10

+10

µA

Input Capacitance

10

pF

LOGIC OUTPUTS

INT Output Voltage Level

High

2 mA high level output current

DVDD − 0.5

V

Low

2 mA low level output current

0.5

V

PDSO Output Voltage Level

High

2 mA high level output current

DVDD − 0.5

V

Low

2 mA low level output current

0.5

V

SDA Output Voltage Level

Low

2 mA low level output current

0.2 × DVDD

V

SDA Output Current Level

Low

6

mA