ADPD4100 datasheet(13/101 Pages) AD

13 / 101 page

Data Sheet

ADPD4100/ADPD4101

Rev. 0 | Page 13 of 101

TYPICAL PERFORMANCE CHARACTERISTICS

0.20

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

0.18

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

LED1A DRIVER COMPLIANCE (V)

LED_CURRENT1_x 0x4A = 120mA

LED_CURRENT1_x 0x19 = 40mA

LED_CURRENT1_x 0x7F = 200mA

LED_CURRENT1_x 0x7 = 10mA

Figure 6. LED Driver Current vs. LED1A Driver Compliance at LED_CURRENT1_x =

0x7 (10 mA), 0x19 (40 mA), 0x4A (120 mA), and 0x7F (200 mA)

–60

–50

–40

–30

–20

–10

100

10k

100k

FREQUENCY (Hz)

Figure 7. AC PSRR vs. Frequency

100

180

160

120

140

200

TIA GAIN (kΩ)

Figure 8. Input Referred Noise vs. TIA Gain, CPD = 70 pF, Integrator Input

Resistor = 400 kΩ

200

500

400

300

100

900

800

600

700

1000

INPUT CAPACITANCE (pF)

200kΩ GAIN

100kΩ GAIN

50kΩ GAIN

25kΩ GAIN

12.5kΩ GAIN

Figure 9. Input Referred Noise vs. Input Capacitance,

Integrator Input Resistor = 400 kΩ

100

NUMBER OF LED PULSES

50kΩ GAIN

100kΩ GAIN

200kΩ GAIN

Figure 10. SNR vs. Number of LED Pulses in Continuous Connect Mode,

CPD = 70 pF, Integrator Input Resistor = 400 kΩ, 90% Full Scale

10000

100

1000

SNR (dB)

50kΩ GAIN

100kΩ GAIN

200kΩ GAIN

Figure 11. Total Power Consumption vs SNR in Continuous Connect Mode

Including LED Power, CPD = 70 pF, Integrator Input Resistor = 400 kΩ, ODR =

25 Hz, CTR = 150 nA/mA, LED Supply Voltage = 4 V, 90% of Full Scale

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