M02040-15 Datasheet, PDF (9/31 Pages) M/A-COM Technology Solutions, Inc. – 3.3 5V Limiting Amplifier for Applications to 2.125 Gbps

M02040-15
3.3/5V Limiting Amplifier for Applications to 2.125 Gbps
Rev V4
2.0 Pin Definitions
Table 2-1.
QFN Pin#
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Pin Descriptions
Name
Function
GND
V_CC
PECLN
PECLP
I_REF
ST_SET
V_CC3
DC_Servo
DINP
DINN
GND
RxAVG_IN
JAM
LOS
RSSI_AVG
RSSI_PP
Center Pad
Ground.
Power supply. Connect to either +5V or +3.3V.
Inverting data output (PECL).
Non-inverting data output (PECL).
Internal LOS reference current. Must be connected to ground through a 12.1 kΩ 1% resistor.
Loss of signal threshold setting input. Connect a 1% resistor between this pin and V_CC3 to set loss of signal threshold.
Power supply input for 3.3V applications or the output of the internally regulated 3.3V voltage when V_CC = 5V. Connect
directly to supply for 3.3V applications (internal regulator not in use). Do not connect to power supply if V_CC = 5V.
DC Servo disable. When high, the DC servo circuit is disabled, allowing the limiting amplifier to be used with data that has
changes quickly in amplitude and phase. Also useful for data containing significant low-speed or DC signals. When low or
floating, DC servo is enabled. Internal 80 kΩ resistor to ground. Drive with a current limited source as described in
Section 4.1.4.
Non-inverting data input. Internally terminated with 50 Ω to V_TT (see Figure 3-2).
Inverting data input. Internally terminated with 50 Ω to V_TT (see Figure 3-2).
Ground.
Average power monitor input. Connect to monitor output of TIAs that produce a current (sink) mirror replica of the
photodiode current. Leave floating if not used.
Output disable. When high, data outputs are disabled (with non-inverting output held high and inverting output held low).
Connect to LOS output to disable outputs with loss of signal. Outputs are enabled when JAM is low or floating. Internal 150
kΩ resistor to ground.
Loss of signal output. Goes high when input signal falls below threshold set by ST_SET. Open collector TTL with internal 80
kΩ pull-up resistor to V_CC.
Receiver average input power monitor. Provides a current source mirror of the current at RxAVG_IN. Connect a resistor to
ground to set the full scale voltage to the desired level at maximum average input power.
Receiver peak-to-peak input voltage monitor. Provides a DC voltage (ground referenced) proportional to the peak-to-peak
input voltage swing.
Ground to PCB for thermal dissipation.
9
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