SE1230Q datasheet(6/9 Pages) SIGE

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SE1230Q

LightCharger

™ 2.5 Gb/s Automatic Gain Control Amplifier

Final

AC Electrical Characteristics

Symbol

Parameter

Min

Typ

Max

Unit

BW (3dB)

Small Signal Bandwidth at –3dB point

2.0

GHz

Gain

Small Signal Gain (f = 100 MHz), differential input /

output

23.5

Maximum Input Signal Level

200

Input Signal Level at AGC Threshold

(IAGC_ADJ =

µA) – note 2

Lower LOS Threshold (LOS = low)

Vin

Upper LOS Threshold (LOS = high)

mV pk

(differential)

Output AGC Signal Level (IAGC_ADJ = 0

µA) – note 3

250

370

500

Vout

Output AGC Signal Level (IAGC_ADJ = 150

µA) – note

170

300

mV pk

(differential)

S11

Input Reflection Coefficient (< 1.3 GHz)

–10

S22

Output Reflection Coefficient (< 1.3 GHz)

–10

Noise Figure (diff. in / diff. out)

tR / tF

Output Rise / Fall Time (Input rise / fall time = 20

ps)

120

Note 2: Vin at AGC threshold is calculated by dividing Vout by the small signal gain.

Note 3: Measured at Vin = 100 mV pk , f = 100 MHz. For intermediate values of IAGC_ADJ the output

amplitude can be estimated by linear interpolation.

DC and AC electrical characteristics are specified over the recommended operating conditions, and with load resistor

(RL) of 50

Ω, AC coupled via 100 nF, for each output. All characteristics are specified for differential signals on inputs

and outputs.

49-DST-01 Rev 1.4 Apr 29/02

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