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PDF MAX3861 Data sheet ( Hoja de datos )
| Número de pieza | MAX3861 | |
| Descripción | 2.7Gbps Post Amp with Automatic Gain Control | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX3861 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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19-2342; Rev 0; 02/02
EVALUATION KIT
AVAILABLE
2.7Gbps Post Amp with Automatic Gain Control
General Description
The MAX3861 is a low-power amplifier with automatic
gain control (AGC), designed for WDM transmission
systems employing optical amplifiers and requiring a
vertical threshold adjustment after the post amp.
Operating from a single 3.3V supply, this AGC amplifier
linearly amplifies/attenuates the input signal while main-
taining a fixed output-voltage swing at data rates up to
2.7Gbps. Both the input and output are on-chip termi-
nated to match 50Ω interfaces.
This amplifier has a small-signal bandwidth of 3.4GHz
and an input-referred noise of 0.26mVRMS. Over an
input signal range of 6mVP-P to 1200mVP-P (46dB), the
MAX3861 delivers a constant output amplitude that is
adjustable from 400mVP-P to 920mVP-P. Variation in
output swing is controlled within 0.2dB over a 16dB
input range. The MAX3861 provides a received-signal-
strength indicator (RSSI) that is linear, within 2.5%, for
input signal levels up to 100mVP-P and an input signal
detect (SD) with programmable threshold.
Applications
OC-48/STM-16 Transmission Systems
WDM Optical Receivers
Long Reach Optical Receivers
Continuous Rate Receivers
Typical Application Circuit
CCD
0.1µF
MAXIM
2.7Gbps
TIA
CCZ
0.22µF
50Ω
0.1µF
50Ω
0.1µF
CZ+ CD+ CD- CG+
CZ- CG-
IN+ OUT+
IN- MAX3861 OUT-
RTH
1.8kΩ
RRSSI
50kΩ
TH OSM
SD VREF
RSSI
EN
SC
CCG
2200pF
50Ω
MAXIM
MAX3873
CDR
50Ω
ROSM
50kΩ
Features
o Single 3.3V Power Supply
o 72mA Supply Current
o 3.4GHz Small-Signal Bandwidth
o 0.26mVRMS Input-Referred Noise
o 6mVP-P to 1200mVP-P Input Range (46dB)
o Input Signal Detect with Programmable Threshold
o RSSI (Linear Up to 100mVP-P)
o Adjustable Output Amplitude
o 0.2dB Output Voltage Variation (Over 16dB Input
Signal Variation)
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX3861EGG
-40°C to +85°C 24 QFN*
MAX3861E/D
-40°C to +85°C Dice**
*EP = Exposed Pad
**Dice are designed to operate over a -40°C to +120°C junc-
tion temperature (TJ) range, but are tested and guaranteed at
TA = +25°C.
Pin Configuration
TOP VIEW
24 23 22 21 20 19
TH 1
VCC 2
IN+ 3
IN- 4
VCC 5
EN 6
MAX3861
18 SD
17 VCC
16 OUT+
15 OUT-
14 VCC
13 OSM
7 8 9 10 11 12
CONTROLLED IMPEDANCE LINE
QFN-EP
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1 page  
2.7Gbps Post Amp with Automatic Gain Control
Typical Operating Characteristics (continued)
(VCC = +3.3V, TA = +25°C, unless otherwise noted.)
POWER-SUPPLY NOISE REJECTION
vs. FREQUENCY
80
|S22| vs. FREQUENCY
0
SIGNAL DETECT THRESHOLD vs. RTH
100
70 -5
60 -10
50
40 VIN = 1000mVP-P
-15
-20
10
30 -25
20
VIN = 10mVP-P
10
0
5k 10k 100k 1M
FREQUENCY (Hz)
10M
-30
-35
-40
50M
MEASURED ON
EVALUATION BOARD
100M
1G
FREQUENCY (Hz)
10G
1
100
1000 10,000
RTH (Ω)
100,000
0
-5
-10
-15
-20
-25
-30
-35
-40
50M
|S11| vs. FREQUENCY
MEASURED ON
EVALUATION BOARD
100M
1G
FREQUENCY (Hz)
OUTPUT SIGNAL AMPLITUDE vs.
SC PIN VOLTAGE (VIN = 1.0VP-P)
1000
900
800
700
600
500
400
10G 0
0.5 1.0 1.5
VSC (V)
2.0
RSSI OUTPUT vs. INPUT AMPLITUDE
3.5
3.0
2.5
2.0
1.5
1.0
0.5 223 - 1PRBS
0
0 50 100 150 200 250 300
INPUT AMPLITUDE (mVP-P)
DISTRIBUTION OF DIFFERENTIAL
OUTPUT OFFSET (VSS = 0V)
25
VCC = 3.6V
VSC = 0V
20 VIN = 700mVP-P
TA = -40°C
15
10
5
0
-10 -8 -6 -4 -2 0 2 4 6 8 10
DIFFERENTIAL OUTPUT OFFSET (mV)
DISTRIBUTION OF DIFFERENTIAL
OUTPUT OFFSET (VSC = 2V)
10
9 VCC = 3.6V
VSC = 2.0V
8 VIN = 700mVP-P
7 TA = -40°C
6
5
4
3
2
1
0
-16 -12 -8 -4 0 4 8 12 16
DIFFERENTIAL OUTPUT OFFSET (mV)
_______________________________________________________________________________________ 5
5 Page 
2.7Gbps Post Amp with Automatic Gain Control
GND
(PAD 9)
TH
(PAD 8)
VCC
(PAD 7)
IN+
(PAD 6)
IN-
(PAD 5)
VCC
(PAD 4)
N.C.
(PAD 3)
EN
(PAD 2)
N.C.
(PAD 1)
CZ-
(PAD 11)
CZ+
(PAD 10)
GND
(PAD 12)
N.C.
(PAD 13)
CD+
(PAD 15)
RSSI
(PAD 17)
N.C.
(PAD 14)
CD-
(PAD 16)
Chip Topography
GND
(PAD 18)
SD
(PAD 19)
VCC
(PAD 20)
OUT+
(PAD 21)
OUT-
(PAD 22)
0.081"
(2.06mm)
VCC
(PAD 23)
OSM
(PAD 24)
VREF
(PAD 32)
SC
(PAD 30)
N.C.
(PAD 31)
GND
(PAD 29)
0.081"
(2.06mm)
CG+
(PAD 28)
N.C.
(PAD 26)
CG-
(PAD 27)
GND
(PAD 25)
TRANSISTOR COUNT: 952
Insulated SiGe Bipolar
PROCESS: Bipolar F60
DIE SIZE: 2.06mm ✕ 2.06mm
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet MAX3861.PDF ] | |
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