M02050-15 Datasheet, PDF (8/28 Pages) M/A-COM Technology Solutions, Inc. – 3.3/5V Limiting Amplifier for Applications to 2.5 Gbps

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
Ground.
V_CC
Power supply. Connect to either +5V or +3.3V.
PECLN
Inverting PECL data output.
PECLP
Non-inverting PECL data output.
I_REF
Internal LOS reference current. Must be connected to ground through a 12.1 kΩ 1% resistor.
ST_SET
Loss of signal threshold setting input. Connect a 1% resistor between this pin and V_CC3 to set loss of signal
threshold.
V_CC3
RATE_SEL
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.
Rate select. When low or floating, the device is in low-rate mode (data rates ≤ 1.25 Gbps) and has reduced
bandwidth. When high, the device is in full-rate mode with full bandwidth. Internal 80 kΩ resistor to ground.
Drive with a current limited source as described in Section 4.1.4.
DINP
DINN
GND
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.
RxAVG_IN
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.
JAM
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.
LOS
RSSI_AVG
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.
RSSI_PP
Receiver peak-to-peak input voltage monitor. Provides a DC voltage (ground referenced) proportional to the
peak-to-peak input voltage swing.
Center Pad Ground to PCB for thermal dissipation.
02050-DSH-002-F
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