Data Sheet

ADL5308

SPECIFICATIONS

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Rev. 0 | 3 of 22

VCC = 5.0 V, TA = 25°C, Input current (IINP) = 10 nA, default register settings, unless otherwise noted.

Table 1. Electrical Specifications

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

INPUT INTERFACES

INP Current Range (INP)

Current into INP (Pin 2)

10

pA

25

mA

IREF Current Range (IREF)

Current into IREF (Pin 3)

5

nA

1

mA

Input Node Voltage

Over input current range

1.3

1.5 to 2.2

2.4

V

SUM Voltage (SUM)

1.53

V

Absolute Offset Voltage

|VPDB − VINP|, IINP = 1 nA

1

6

mV

|VPDB − VSUM|

1

mV

Temperature Drift

−12

µV/°C

PHOTODIODE BIAS (PDB)

Output Voltage

VPDB, IPDB = 1 µA

1.53

V

VPDB, IPDB = 10 mA

3.3

4.4

5

V

Transresistance (RT)

(VPDB − VINP)/IPD

180

282

380

Ω

IPD Threshold (ITH)

Constant PDB voltage below ITH

160

µA

LOGARITHMIC OUTPUT

Logarithmic Slope

198

200

202

mV/dec

Logarithmic Intercept

8

10

12

pA

Logarithmic Conformance Error 10 nA ≤ IINP ≤ 1 mA

−0.7

±0.2

0.8

dB

Output Voltage

IINP = 10 mA

1.805

V

IINP = 1 nA

406

mV

Small Signal Bandwidth

IINP = 10 nA

970

kHz

Fall, Rise Times

IINP from 220 µA to 10 nA, measure at 90% and

10% points

<2.4

μs

Settling Time

IINP from 220 µA to 10 nA, VLOG settles within

2 dB of final value, using 220 Ω/1.2 nF VLOG

low-pass filter

<3.5

μs

Output Current

IINP = 1 nA, VVLOG = 0.6 V, sinking

49

mA

IINP = 10 mA, VVLOG = 1.6 V, sourcing

17

mA

Output Impedance

1

Ω

COMPARATOR

Output High Voltage

CREF = 0 V, IINP = 10 mA

3.3

V

Output Low Voltage

CREF = 1 V, IINP = 1 nA

0

V

Short-Circuit Output Current

CMP = 2.8 V, CREF = 1 V, IINP = 10 mA,

sourcing

9.2

mA

CMP = 0.2 V, CREF = 1 V, IINP = 1 nA, sinking

8.8

mA

Hysteresis

HYST = 1 V, CREF_DAC (0x40) = 1.27 V

109

mV

Latch Enable Voltage

Voltage on HYST pin

1.6

V

POWER SUPPLY

Positive Supply Voltage

4.75

5.0

5.25

V

Quiescent Current

IINP = 1 µA

32

mA

Power-Supply Rejection Ratio

IINP = 10 nA, measured at 20 kHz

34

dB

I2C INTERFACE

Logic Low Input Voltage

0.9

V

Logic High Input Voltage

2.1

3.3

V

Current Into SCL, SDA

±50

μA

Input Hysteresis Voltage, VHYST

250

mV