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PDF ADN2882 Data sheet ( Hoja de datos )
| Número de pieza | ADN2882 | |
| Descripción | Low Noise Transimpedance Amplifier | |
| Fabricantes | Analog Devices | |
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Preliminary Technical Data
FEATURES
Technology: high performance SiGe
Bandwidth: 3.2 GHz minimum
Input noise current density: 10 pA√Hz
Optical sensitivity: −22 dBm
Differential transimpedance: 4000 V/A
Power dissipation: 75 mW
Differential output swing: 250 mV p-p
Input current overload: +3.25 dBm
Output resistance: 50 Ω side
RSSI voltage and current ratio: 0.8V/mA
Low-freq cutoff: 15 kHz
On-chip PD filter: RF = 200 Ω CF = 20 pF
Die size: 0.7 mm × 1.2 mm
APPLICATIONS
4.25 Gbps optical modules
SFF-8472 compliant receivers
PIN/APD-TIA receive optical subassembly
SONET/GbE/FC optical receivers, transceivers, transponders
4.25 Gbps 3.3V Low Noise
Transimpedance Amplifier
ADN2882
PRODUCT DESCRIPTION
The ADN2882 is a compact, high performance 3.3 V power
supply SiGe transimpedance amplifier (TIA) optimized for
small form factor 4.25 Gbps metro-access, Ethernet PIN/APD-
TIA modules and 1×/2×/4× Fibre channel receiver applications
and meets OC48 SR/IR sensitivity requirements. The ADN2882
is a single-chip solution for detecting photodiode current with a
differential output voltage. The ADN2882 features low input
referred noise current of 600 nA enabling −22 dBm sensitivity;
3.2 GHz minimum bandwidth enables up to 4.25 Gbps
operation; +3.25 dBm nominal operation at 10dB extinction
ratio. RSSI output signal proportional to average input current
is available for monitoring and alarm generation. To facilitate
assembly in small form factor packages such as a TO-46 or TO-
56 header, the ADN2882 integrates the photodiode filter
network on chip and features 15 kHz low frequency cutoff
without any external components. The ADN2882 chip area is
less than 1 mm2, operates with a 3.3 V power supply and is
available in die form.
FUNCTIONAL BLOCK DIAGRAM
3.3V
FILT ER
IN
VCC_FI LT ER
VCC
200Ω
1100Ω 50Ω
50Ω
OU T
OU T B
20pF
0.85V
GND
5mA
GND
CAP
RSSI
Figure 1. ADN2882 Block Diagram
Rev. PrD November 04 2004
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.
1 page  
Preliminary Technical Data
PAD DESCRIPTION
ADN2882
FILT ER
B
Table 3.
Pad No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Pad Name
GND
IN
TEST
FILTER
FILTER
GND
RSSI
CAP
GND
GND
OUTB
OUT
GND
GND
VCCFILTER
VCC
VCC
RSSI
Function
Ground (input return).
Current input. Bond directly to PD anode.
Test probe Pad. Leave floating.
Filter Output
Filter Output
Ground.
Voltage Output (provides average input current reading)
Low Frequency setpoint. Connect with 1 nF capacitance to GND for < 15 kHz.
Ground.
Ground (output return).
Negative Output. Drives 50 Ω termination (ac or dc termination).
Positive Output. Drives 50 Ω termination (ac or dc termination).
Ground (output return).
Ground.
Filter Supply. Connect to VCC to enable on-chip 200 Ω, 20 pf Filter.
3.3 V positive Supply. Recommended bypass to GND is 200 pF RF capacitor.
3.3 V positive Supply. Recommended bypass to GND is 200 pF RF capacitor.
Rev. PrD Nov. 04 2004 | Page 5 of 10
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet ADN2882.PDF ] | |
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