MAX3760 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – 622Mbps, Low-Noise Transimpedance Preamplifier for LAN and WAN Optical Receivers

19-4765; Rev 0; 7/98
EVAALVUAAILTAIOBNLEKIT _{622Mbps, Low-Noise Transimpedance}
Preamplifier for LAN and WAN Optical Receivers
General Description
The MAX3760 is a transimpedance preamplifier for
622Mbps ATM applications. It operates from a single
+5V supply and typically consumes only 100mW
power. The preamplifier converts a small photodiode
current to a differential voltage. A DC cancellation cir-
cuit provides a true differential output swing over a
wide range of input current levels, thus reducing pulse-
width distortion.
6.5kΩ transimpedance gain and 560MHz bandwidth,
combined with low 73nA input-referred noise, provide
-31.5dBm typical sensitivity in 1300nm receivers. The
circuit accepts a 1mAp-p input current, resulting in a
typical optical overload of -3dBm. The device operates
over an extended temperature range of -40°C to +85°C.
The MAX3760 is internally compensated and requires
few external components. In die form it includes a
space-saving filter connection, which provides positive
bias for the photodiode through a 1kΩ resistor to V_CC.
These features, combined with the die aspect ratio and
dimensioning, allow the MAX3760 to assemble easily
into a TO-style header with a photodiode.
The MAX3760 is designed to be used with either the
MAX3761 or the MAX3762 limiting-amplifier ICs. When
combined with a photodiode, the chipset forms a com-
plete 5V, 622Mbps receiver. The MAX3760 is available
in die form and in an 8-pin SO package.
____________________________Features
o 73nA RMS Input-Referred Noise
o 560MHz Bandwidth
o 1mA Peak Input Current
o 6.5kΩ Gain
o Operation from -40°C to +85°C
o 100mW Typical Power Consumption
o Single +5V Supply
Ordering Information
PART
MAX3760ESA
MAX3760E/D
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 SO
Dice*
*Dice are designed to operate over a -40°C to +100°C junction
temperature (T_j) range, but are tested and guaranteed at
T_A = +25°C.
________________________Applications
622Mbps ATM LAN Optical Receivers
622Mbps WAN Optical Receivers
TOP VIEW
Pin Configuration
V_CC 1
IN 2
INREF 3
GND 4
MAX3760
8 COMP
7 OUT+
6 OUT-
5 GND
Typical Application Circuit
+5V
(FILTER)
100pF
INREF
IN
0.01µF
V_CC
1k
MAX3760
OUT+
0.01µF
MAX3761
MAX3762
LIMITING
AMPLIFIER
100Ω
(OPTIONAL)
OUT-
0.01µF
GND
COMP*
SO
( ) INDICATE PINS AVAILABLE ONLY ON THE DIE.
*NOT CONNECTED
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