ADN2882 View Datasheet(PDF) - Analog Devices
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ADN2882 Datasheet PDF : 12 Pages
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Data Sheet
4.25 Gbps, 3.3 V Low Noise,
Transimpedance Amplifier
ADN2882
FEATURES
GENERAL DESCRIPTION
Bandwidth: 3.5 GHz
The ADN2882 is a 3.3 V high gain SiGe transimpedance
Input noise current density: 8 pA/√Hz
amplifier (TIA) which converts the small signal current of a
Optical sensitivity
photo detector to a large differential voltage output. The
−22.0 dBm1
ADN2882 features a typical 475 nA input-referred noise,
−20.4 dBm2
enabling an optical sensitivity of −22 dBm (0.85 A/W PIN).
Differential transimpedance: 3700 V/A
Power dissipation: 80 mW
Differential output swing: 260 mV p-p
Input overload current: 5.6 mA p-p
On-chip RSSI function
E Low frequency cutoff: 12 kHz
On-chip PD filter: RF = 200 Ω, CF = 20 pF
Die size: 0.7 mm × 1.2 mm
T APPLICATIONS
4.25 Gbps optical receivers
GbE/FC optical receivers
E SFF-8472-compliant receivers
L PIN/APD-TIA receiver optical subassemblies
With a bandwidth of 3.5 GHz, the ADN2882 allows a data rate
operation up to 4.25 Gbps. Typical power dissipation is 80 mW.
To facilitate the assembly in small form factor packages, such as
TO-46 headers, the ADN2882 provides an on-chip RC filter
(200 Ω, 20 pF) and features a 12 kHz low frequency cutoff
without using an external capacitor. An on-chip RSSI circuit,
which generates a voltage proportional to the average photo-
diode current, is available for power monitoring and assembly
alignment.
The ADN2882 is available in die form. With a chip area of
1.2 mm × 0.7 mm, the TIA layout is optimized for TO-Can-
based packages.
1 Based on 1550 nm PIN, CD = 0.5 ± 0.10 pF, responsivity = 0.85 A/W,
ER = 9 dB, PRBS 231 − 1 at 4.25 Gbps, BER < 10−12.
2 Calculated result based on an 850 nm PIN, CD = 0.5 ± 0.15 pF,
responsivity = 0.48 A/W, ER = 9 dB, at 4.25 Gbps, BER < 10−12.
O FUNCTIONAL BLOCK DIAGRAM
3.3V
VCCFILTER VCC
SFILTER
BIN
200Ω
50Ω
50Ω
1100Ω
OUT
OUTB
O 20pF
0.85V
5mA
RSSI
GND
GND CAP
Figure 1.
Rev. A
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