MAX3266_00 Datasheet, PDF (1/10 Pages) Maxim Integrated Products – 1.25Gbps/2.5Gbps, +3V to +5.5V, Low-Noise Transimpedance Preamplifiers for LANs

19-4796; Rev 1; 6/00
EVAALVUAAILTAIOBNLEKIT
1.25Gbps/2.5Gbps, +3V to +5.5V, Low-Noise
Transimpedance Preamplifiers for LANs
General Description
The MAX3266 is a transimpedance preamplifier for
1.25Gbps local area network (LAN) fiber optic
receivers. The circuit features 200nA input-referred
noise, 920MHz bandwidth, and 1mA input overload.
The MAX3267 provides a pin-for-pin compatible solu-
tion for communications up to 2.5Gbps. It features
500nA input-referred noise, 1.9GHz bandwidth, and
1mA input overload.
Both devices operate from a +3.0V to +5.5V single sup-
ply and require no compensation capacitor. They also
include a space-saving filter connection that provides
positive bias for the photodiode through a 1.5kΩ resistor
to V_CC. These features allow easy assembly into a TO-46
or TO-56 header with a photodiode.
The 1.25Gbps MAX3266 has a typical optical dynamic
range of -24dBm to 0dBm in a shortwave (850nm)
configuration or -27dBm to -3dBm in a longwave
(1300nm) configuration. The 2.5Gbps MAX3267 has a
typical optical dynamic range of -21dBm to 0dBm in a
shortwave configuration or -24dBm to -3dBm in a long-
wave configuration.
Applications
Gigabit Ethernet
1Gbps to 2.5Gbps Optical Receivers
Fibre Channel
Features
o 200nA Input-Referred Noise (MAX3266)
500nA Input-Referred Noise (MAX3267)
o 920MHz Bandwidth (MAX3266)
1900MHz Bandwidth (MAX3267)
o 1mA Input Overload
o +3.0V to +5.5V Single-Supply Voltage
Ordering Information
PART
TEMP. RANGE PIN-PACKAGE
MAX3266CSA
0°C to +70°C
8 SO
MAX3266C/D
—
Dice*
MAX3267CSA
0°C to +70°C
8 SO
MAX3267C/D
—
Dice*
MAX3267ESA
-40°C to +85°C
8 SO
MAX3267E/D
—
Dice*
*Dice are designed to operate over a -40°C to +140°C junction tem-
perature (Tj) range, but are tested and guaranteed at T_A = +25°C.
TOP VIEW
V_CC 1
N.C. 2
IN 3
FILTER 4
Pin Configuration
MAX3266
MAX3267
8 GND
7 OUT+
6 OUT-
5 GND
SO
V_CC
0.01µF
Typical Application Circuit
C_FILTER
400pF
PHOTODIODE
1.5k
FILTER
IN
V_CC
OUT+
MAX3266
MAX3267
OUT-
GND
0.1µF
100Ω
0.1µF
LIMITING
AMPLIFIER
________________________________________________________________ Maxim Integrated Products 1
For free samples and the latest literature, visit www.maxim-ic.com or phone [phone].
For small orders, phone [phone].