ADPD4200 datasheet(5/93 Pages) AD

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Data Sheet

ADPD4200

SPECIFICATIONS

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Rev. 0 | 5 of 93

PERFORMANCE SPECIFICATIONS

AVDD = DVDD1 = IOVDD = 1.8 V, and TA = full operating temperature range, unless otherwise noted.

Table 3.

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

DATA ACQUISITION

Datapath Width

Bits

FIRST IN, FIRST OUT (FIFO) SIZE

512

Bytes

LED DRIVER

LED Peak Current per Driver

LED pulse enabled

200

LED Peak Current, Total

Using multiple LED drivers simultaneously

400

Driver Compliance Voltage

For any LED driver output at ILED = 40 mA

200

LED PERIOD

AFE width = 4 µs1

µs

AFE width = 3 µs

µs

SAMPLING RATE2

Single time slot, four data bytes to FIFO, 2 µs LED pulse

0.004

9000

OSCILLATOR DRIFT

32 kHz Oscillator

Percent variation from 25°C to 85°C

3.00

5.00

Percent variation from +25°C to –40°C

–3.00

–7.00

1 MHz Oscillator

Percent variation from 25°C to 85°C

1.00

2.00

Percent variation from +25°C to –40°C

–1.00

–3.00

32 MHz Oscillator

Percent variation from 25°C to 85°C

1.00

2.00

Percent variation from +25°C to –40°C

–2.00

–4.00

1 Minimum LED period = (2 × AFE width) + 2 µs.

2 The maximum value in this specification is the internal analog-to-digital converter (ADC) sampling rate using the internal 1 MHz state machine clock. The communication

interface like SPI read rates in some configurations may limit the ODR.

Table 4.

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

TRANSIMPEDANCE AMPLIFIER (TIA) GAIN

12.5

200

kΩ

PULSED SIGNAL CONVERSIONS, 3 μs LED PULSE

4 μs integration width, signal integration mode

ADC Resolution1

TIA feedback resistor

12.5 kΩ

6.2

nA/LSB

25 kΩ

3.1

nA/LSB

50 kΩ

1.5

nA/LSB

100 kΩ

0.77

nA/LSB

200 kΩ

0.38

nA/LSB

ADC Saturation Level2

TIA feedback resistor

12.5 kΩ

μA

25 kΩ

μA

50 kΩ

12.5

μA

100 kΩ

6.22

μA

200 kΩ

3.11

μA

PULSED SIGNAL CONVERSIONS, 2 μs LED PULSE

3 μs integration width, single integration mode

ADC Resolution1

TIA feedback resistor

12.5 kΩ

8.2

nA/LSB

25 kΩ

4.1

nA/LSB

50 kΩ

2.04

nA/LSB

100 kΩ

1.02

nA/LSB

200 kΩ

0.51

nA/LSB

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