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ADN2880 Amplifier Datasheet |
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| Part Number | ADN2880 |
| Description | Transimpedance Amplifier |
| Manufacture | Analog Devices |
| Total Page | 12 Pages |
| Datasheet |
www.DataSheet4U.com
FEATURES
Bandwidth: 2.5 GHz
Optical sensitivity: −24.2 dBm1
Differential transimpedance: 4400 V/A
Power dissipation: 70 mW
Differential output swing: 260 mV p-p
Input overload current: 4.3 mA p-p
On-chip RSSI function
Low frequency cutoff: 20 kHz
On-chip PD filter: RF = 200 Ω, CF = 20 pF
Die size: 0.7 mm × 1.2 mm
APPLICATIONS
3.2 Gbps or below optical receivers
SONET/GbE/FC optical receivers
SFF-8472-compliant receivers
PIN/APD-TIA receive optical subassemblies (ROSA)
3.2 Gbps, 3.3 V, Low Noise,
Transimpedance Amplifier
ADN2880
GENERAL DESCRIPTION
The ADN2880 is a 3.3 V, high gain SiGe transimpedance
amplifier (TIA). The TIA converts the small signal current of a
photo detector into differential voltage output. The ADN2880
features a 315 nA typical input-referred noise, enabling an
optical sensitivity of −24.2 dBm (0.85 A/W PIN). With a
bandwidth of 2.5 GHz, the ADN2880 allows a data rate
operation up to 3.2 Gbps. Typical power dissipation is
approximately 70 mW.
To facilitate the assembly in small form factor packages, such
as TO-46 headers, the ADN2880 provides an on-chip RC filter
(200 Ω, 20 pF) and features a 20 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 also available for power monitoring and
assembly alignment.
The ADN2880 is available in die form. With a chip area of
1.2 mm × 0.7 mm, the TIA layout is specifically optimized for
TO-Can-based packages.
1 Based on 1550 nm PIN, responsivity = 0.85 A/W, ER = 9 dB, BER < 10−10.
FUNCTIONAL BLOCK DIAGRAM
3.3V
VCCFILTER
VCC
FILTER
IN
200Ω
50Ω
1400Ω
50Ω
OUT
OUTB
20pF
0.85V
GND
5mA
RSSI
GND CAP
Figure 1.
Rev. 0
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
© 2005 Analog Devices, Inc. All rights reserved.
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ADN2880
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Electrical Specifications ................................................................... 3
Absolute Maximum Ratings............................................................ 4
ESD Caution.................................................................................. 4
REVISION HISTORY
7/05—Revision 0: Initial Version
Pad Layout and Function Descriptions ..........................................5
Typical Performance Characteristics ..............................................6
Assembly Recommendations...........................................................9
Outline Dimensions ....................................................................... 12
Die Information.......................................................................... 12
Ordering Guide .......................................................................... 12
Rev. 0 | Page 2 of 12
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| Features | www.DataSheet4U.com 3.2 Gbps, 3.3 V, Lo w Noise, Transimpedance Amplifier ADN28 80 FEATURES Bandwidth: 2.5 GHz Optical sensitivity: −24.2 dBm 1 Differential transimpedance: 4400 V/A Power dissipa tion: 70 mW Differential output swing: 260 mV p-p Input overload current: 4.3 mA p-p On-chip RSSI function Low freque ncy cutoff: 20 kHz On-chip PD filter: R F = 200 Ω, CF = 20 pF Die size: 0.7 mm × 1.2 mm GENERAL DESCRIPTION The ADN 2880 is a 3.3 V, high gain SiGe transim pedance amplifier (TIA). The TIA conver ts the small signal current of a photo detector into differential voltage outp ut. The ADN2880 features a 315 nA typic al input-referred noise, enabling an op tical sensitivity of −24.2 dBm (0.85 A/W PIN). With a bandwidth of 2.5 GHz, the ADN2880 allows a data rate operatio n up to 3.2 Gbps. Typical power dissipa tion is approximately 70 mW. To facilit ate the assembly in small form factor p ackages, such as TO-46 headers, the ADN 2880 provides an on-chip RC filter (200 Ω, 20 pF) and features a 20 k. |
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