ADN2843CHIPSET datasheet(2/12 Pages) AD

No. de pieza	ADN2843CHIPSET

Descripción Electrónicos	10.709 Gbps Laser Diode Driver Chipset

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REV. 0

–2–

ADN2843–SPECIFICATIONS

(VCC = 3.0 V to 3.6 V, All specifications TMIN to TMAX, unless otherwise noted. Typical

values as specified at 25 C.)

Parameter

Min

Typ

Max

Unit

Conditions

LASER BIAS (BIAS)

Output Current I

BIAS

380

mA

Compliance Voltage

1.2

V

CC – 1.0

V

I

BIAS during ALS

10

A

See Note 1

ALS Shutdown Response Time

10

s

MODULATION CURRENT (IMODP, IMODN)

See Note 2

Output Current I

MOD

580

mA

Compliance Voltage

1.2

V

CC

V

I

MOD during ALS

10

A

Rise Time

25

ps

Fall Time

23

ps

Random Jitter

170

fs rms

See Note 3

Total Jitter

7.41

ps p-p

See Note 4

POWER SET INPUT (PSET)

External Capacitance

80

pF

See Note 5

Voltage

1.15

1.35

V

EXTINCTION RATIO SET INPUT (ERSET)

Allowable Resistance Range

1.5

25

k

Voltage

1.15

1.35

V

ALARM SET (ASET)

Allowable Resistance Range

1.2

13.2

k

Voltage

1.15

1.35

V

Hysteresis

5

%

CONTROL LOOP

Time Constant

0.22

s

DATA INPUTS (DATAP, DATAN)

V p-p (Single-Ended Peak-to-Peak)

300

800

mV

Input Impedance (Single-Ended)

50

LOGIC INPUTS (ALS, MODE)

V

IH

2.4

V

IL

0.8

V

ALARM OUTPUTS (Internal 30 k to V

CC)

V

OH

2.4

V

OL

0.4

V

IDTONE

f

IN

10

1000

kHz

Input Current Range

50

4000

A

Voltage on IDTONE

V

CC – 2

V

MONITOR PD (MPD, MPD2)

Current

50

1200

A

Input Voltage

1.65

V

IBMON, IMMON, IMPDMON, IMPDMON2

IBMON, IMMON Division Ratio

100

A/A

IMPDMON, IMPDMON2

1

A/A

IMPDMON to IMPDMON2 Matching

2

%

Measured at 1200 A

Compliance Voltage

0

V

CC – 1.5

V

SUPPLY

V

CC

3.0

3.3

3.6

V

I

CC (ADN2844)

36

mA

See Note 6

I

CC (ADN2845)

75

mA

See Note 6

NOTES

1In ALS mode current is sourced to the laser from the I

BIAS pin, which reverse biases the laser.

2The ADN2845 high speed specifications are measured into a 5

load.

3RMS jitter measured with a 0000 0000 1111 1111 repeating pattern at 10.7 Gbps rate.

4Peak-to-peak total jitter measured with a 213 – 1 PRBS with 80 CIDs pattern at 10.7 Gbps rate.

5Max capacitance refers to capacitance of photodiode and other parasitic capacitance.

6I

BIAS = 0, IMOD = 0 (when ALS is asserted). See Power Dissipation section on page 7 for calculation of complete power dissipation.

Specifications subject to change without notice.

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