MAX3664 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – 622Mbps, Ultra-Low-Power, 3.3V Transimpedance Preamplifier for SDH/SONET

19-0479; Rev 1; 7/97
EVAALVUAAILTAIOBNLEKIT
622Mbps, Ultra-Low-Power, 3.3V
Transimpedance Preamplifier for SDH/SONET
________________General Description
The MAX3664 low-power transimpedance preamplifier
for 622Mbps SDH/SONET applications consumes only
85mW. Operating from a single +3.3V supply, it converts
a small photodiode current to a measurable differential
voltage. A DC cancellation circuit provides a true differ-
ential output swing over a wide range of input current
levels, thus reducing pulse-width distortion. The differen-
tial outputs are back-terminated with 60Ω per side.
The transimpedance gain is nominally 6kΩ. For input
signal levels beyond approximately 100µAp-p, the
amplifier will limit the output swing to 900mV. The
MAX3664’s low 55nA input noise provides a typical
sensitivity of -33.2dBm in 1300nm, 622Mbps receivers.
The MAX3664 is designed to be used in conjunction
with the MAX3675 clock recovery and data retiming IC
with limiting amplifier. Together, they form a complete
3.3V, 622Mbps SDH/SONET receiver.
In die form, the MAX3664 is designed to fit on a header
with a PIN diode. It includes a filter connection, which
provides positive bias for the photodiode through a 1kΩ
resistor to V_CC. The device is also available in 8-pin SO
and µMAX packages.
________________________Applications
SDH/SONET Receivers
PIN/Preamplifier Receivers
Regenerators for SDH/SONET
____________________________Features
o Single +3.3V Supply Operation
o 55nA_RMS Input-Referred Noise
o 6kΩ Gain
o 85mW Power
o 300µA Peak Input Current
o 200ps Max Pulse-Width Distortion
o Differential Output Drives 100Ω Load
o 590MHz Bandwidth
_______________Ordering Information
PART
MAX3664E/D
MAX3664ESA
MAX3664EUA*
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
Dice
8 SO
8 µMAX
* Contact factory for package availability.
Pin Configuration appears at end of data sheet.
__________________________________________________Typical Application Circuit
100pF
V_CC (+3.3V)
0.01µF
1k
(FILT)
INREF2
INREF1
V_CC
OUT+
MAX3664
IN
OUT-
COMP
GND
47nF
100Ω
47nF
400pF
( ) ARE FOR MAX3664E/D (DICE) ONLY.
V_CC (+3.3V)
LIMITING
AMP
MAX3675
DATA
AND
CLOCK
RECOVERY
DATA
CLK
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