ADPD4000 datasheet(3/82 Pages) AD

3 / 82 page

Data Sheet

ADPD4000/ADPD4001

Rev. A | Page 3 of 82

SPECIFICATIONS

TEMPERATURE AND POWER SPECIFICATIONS

Table 1. Operating Conditions

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

TEMPERATURE RANGE

Operating Range

−40

+85

°C

Storage Range

−65

+150

°C

POWER SUPPLY VOLTAGES

Supply Voltage, VDD

Applied at the AVDD, DVDD1, and DVDD2 pins

1.7

1.8

1.9

Input/Output Driver Supply Voltage, IOVDD

Applied at the IOVDD pin

1.7

1.8

3.6

AVDD = DVDD = IOVDD = 1.8 V, TA = 25°C, unless otherwise noted.

Table 2. Current Consumption

Parameter

Symbol

Test Conditions/Comments

Min

Typ

Max

Unit

POWER SUPPLY (VDD) CURRENT

VDD Supply Current1

Signal-to-noise ratio (SNR) = 75 dB, 25 Hz output data rate

(ODR), single time slot

µA

Total System Power

Dissipation

Combined LED and AFE power, continuous

photoplethysmography (PPG) measurement at 75 dB SNR,

25 Hz ODR, 100 nA/mA current transfer ratio (CTR)

μW

Peak VDD Supply Current (1.8 V)

1-Channel Operation

IVDD_PEAK

Peak VDD current during time slot sampling

4.0

Standby Mode Current

IVDD_STANDBY

0.25

µA

LED VOLTAGE (VLED) SUPPLY

CURRENT2

Average Supply Current

VLEDA or VLEDB

Peak LED current = 25 mA, LED pulse width = 3 µs

Per Pulse

25 Hz data rate

1.875

µA

100 Hz data rate

7.5

µA

VDD is the voltage applied at the AVDD and DVDD pins.

VLED applies to the external LED supply voltage for any given LED being driven by the ADPD4000/ADP4001 LED drivers under the listed conditions.

PERFORMANCE SPECIFICATIONS

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

Table 3.

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

DATA ACQUISITION

Datapath Width

Bits

FIFO SIZE

256

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

Percent variation from +25°C to −40°C

−10

1 MHz Oscillator

Percent variation from 25°C to 85°C

Percent variation from +25°C to −40°C

−2

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