ADPD107 datasheet(9/66 Pages) AD

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Data Sheet

ADPD105/ADPD106/ADPD107

Rev. A | Page 9 of 66

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

SYSTEM PERFORMANCE

Total Output Noise Floor

Normal mode; per pulse; per channel; no LED; photodiode

capacitance (CPD) = 70 pF

25 kΩ; referred to ADC input

1.0

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

per channel4

78.3

50 kΩ; referred to ADC input

1.2

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

50 kΩ; saturation SNR per pulse per channel4

76.6

100 kΩ; referred to ADC input

1.7

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

100 kΩ; saturation SNR per pulse per channel4

73.6

200 kΩ; referred to ADC input

2.75

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

200 kΩ; saturation SNR per pulse per channel4

69.5

DC Power Supply Rejection Ratio (DC PSRR)

−37

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 (GPIOx, SCL, SDA,

SCLK, MOSI, CS)

Input Voltage Level

High

VIH

0.7 × DVDD

3.6

Low

VIL

0.3 × DVDD

Input Current Level

High

IIH

−10

+10

μA

Low

IIL

−10

+10

μA

Input Capacitance

CIN

LOGIC OUTPUTS

Output Voltage Level

GPIOx, MOSI

High

VOH

2 mA high level output current

DVDD − 0.5

Low

VOL

2 mA low level output current

0.5

Output Voltage Level

SDA

Low

VOL1

2 mA low level output current

0.2 × DVDD

Output Current Level

SDA

Low

IOL

VOL1 = 0.6 V

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