RFRX8888
RFRX8888
RFRX8888
xPON Video
Receiver
xPON VIDEO RECEIVER
Package: QFN, 20-Pin, 4mmx4mmx0.85mm
Features









TIA IN A
On-Die Bias Circuitry Lowers End
Product BOM Acquistion and
SMD Placement Costs
Efficient (Power Consumption
1.4W for +12V)
Best-in-Class MER (38.5dB
minimum)
Applications


xPON RF Overlay Video Receiver
for FTTX Triplexer-Equipped
Optical Network Termination
(ONT) and RFoG Network Interface Unit (NIU)
FTTB Multi-Dwelling and Multiple
Tenant Unit Distribution of
Optically Encoded Video
19
18
17
NC
16
1
BIAS 1
2
NC
3
BIAS 1
4
TIA IN B
Gain
Block
15
POST AMP
BIAS A
14
POST AMP
OUT A
13
Gain
Block
5
Linearity Better than -63dBc CSO
and -66 dBc CTB at +23dBmV RF
Out per Channel (79-NTSC
Analog channels and 75 Digital
QAM channels)
+23dBmV per Channel/Carrier
RF Output with no 4:1 transformer required
20
POST AMP POST AMP
BIAS
IN A
NC
12
POST AMP
OUT B
11
POST AMP
BIAS B
TIA
Best-in-Class Low Noise (3.0
pA/rtHz Equivalent Input Noise
Current, Typical)
33dB AGC Range with Recommended External Control
Circuitry
TIA
OUT A
TIA
+12V Single Supply Operation
48MHz to 1002MHz Operational
Bandwidth
BIAS
FLTR
6
7
BIAS
FLTR
TIA
OUT B
8
9
POST AMP POST AMP
IN B
BIAS
10
NC
Functional Block Diagram
Product Description
The RFRX8888 integrated circuit (IC) performs ultra-low noise transimpedance
amplification of the differential input from a high performance 1550nm optical
wavelength photo detector (PD). The RFRX8888 IC's output is linear low distortion
RF from 48MHz to 1002MHz. The RFRX8888 IC is ideal for 1550nm optical wavelength RF analog or digital overlay video receive circuitry employed in xPON FTTP
ONT triplexer and quadplexer modules. The RFRX8888 IC first stage incorporates
on-die bias circuitry thus simplifying external-to-IC end product design and lowering
end product overall assembly cost. It is optimized for operation from a +12 Vdc
power supply eliminating the need for a supplemental ONT power supply in most
xPON applications. The RFRX8890 IC is available for FTTP applications requiring
+5 Vdc power supply operation.
Ordering Information
RFRX8888
RFRX8888SB
RFRX8888SR
RFRX8888TR7
RFRX8888TR13
25pcs Sample Bag
5pcs Sample Bag
100pcs Sample Bag
750pcs 7” Reel
2500pcs 13” Reel
Optimum Technology Matching® Applied
GaAs HBT
GaAs MESFET
InGaP HBT
SiGe BiCMOS
Si BiCMOS
SiGe HBT
GaAs pHEMT
Si CMOS
Si BJT
GaN HEMT
RF MEMS
LDMOS
RF MICRO DEVICES®, RFMD®, Optimum Technology Matching®, Enabling Wireless Connectivity™, PowerStar®, POLARIS™ TOTAL RADIO™ and UltimateBlue™ are trademarks of RFMD, LLC. BLUETOOTH is a trademark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks and registered trademarks are the property of their respective owners. ©2006, RF Micro Devices, Inc.
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RFRX8888
Absolute Maximum Ratings
Parameter
Rating
Unit
15
V
Operating Temperature Range
-40 to +85
°C
Storage Temperature Range
-40 to +85
°C
105
°C
Supply Voltage (VDD)
Maximum Rated Case Temperature
Parameter
Min.
Bandwidth
Caution! ESD sensitive device.
Exceeding any one or a combination of the Absolute Maximum Rating conditions may
cause permanent damage to the device. Extended application of Absolute Maximum
Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Absolute Maximum Rating conditions is not implied.
RoHS status based on EUDirective2002/95/EC (at time of this document revision).
The information in this publication is believed to be accurate and reliable. However, no
responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any
infringement of patents, or other rights of third parties, resulting from its use. No
license is granted by implication or otherwise under any patent or patent rights of
RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice.
Specification
Typ.
Max.
Unit
1002
MHz
48
RF Gain at 1002MHz
36.5
Gain Flatness
dB
1.0
1.5
+/- dB
4.0
5.0
dB
Equivalent Input Noise
3.0
3.2
pA/rtHz
RF Output Level at 547.25MHz
23
24
dBmV/ch
Tilt
3.0
Output Return Loss
-16
CSO
-65
-63
dBc
CTB
-70
-66
dBc
MER
38.5
30
RF Power Supply Voltage
12
Supply Current
120
Gain=20*log (Z/75); higher gain configurations available.
Linear Tilt from 48MHz to 1002MHz. Higher tilt can be
achieved.
AGC using 3.3% /ch OMI; output level can be fixed by
external or internal AGC; Higher RF output possible
with the use of a suitable balun on postamp Out A and
Out B pins
dB
39.5
Gain Control Range
Condition
dBc
dB
12.5
79 NTSC Analog channels (17dBmV at 547.25 MHz)
and 75QAM256 digital channels (6dB down), equivalent to virtually 18.4dBmV at 1003MHz. Optical input
level +2dBm; AGC voltage adjusted for output level of
23dBmV/channel at 547.25MHz with 2.6%/ch OMI
(measured with complete evaluation board circuit in
operation including PD and external AGC circuit).
Using suggested application circuit
V
mA
Test Conditions: TA =25°C, VDD =12V, unless otherwise specified
Optical Input and Triplexer Requirements
Parameter
Min.
Optical Input Power
Typ.
-10
Max.
2
Unit
dBm
Optical Modulation Index (OMI)
2.6
%/ch
Triplexer 1550 nm PIN Responsivity
0.95
mA/mW
Triplexer 1550 nm PIN Capacitance
0.95
pF
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DS101123
RFRX8888
Pin
1
2
Function
TIA IN A
BIAS 1
Description
3
4
NC
BIAS 1
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
TIA In B
BIAS FLTR
TIA OUT B
POST AMP BIAS
POST AMP IN B
NC
POST AMP BIAS B
POST AMP OUT B
NC
POST AMP OUT A
POST AMP BIAS A
NC
POST AMP IN A
POST AMP BIAS
TIA OUT A
BIAS FLTR
Input to the TIA stage of the receiver.
Biasing for the first stage.
The current flowing through this pin is used to control the biasing for the first stage amplifier.
Not connected.
Biasing for the first stage.
The current flowing through this pin is used to control the biasing for the first stage amplifier.
Input to the TIA stage of the receiver.
Bypass filtering for TIA Bias
Output of the first stage TIA.
Bias input for the second stage amplifier (post amp).
Input for the second stage amplifier (post amp).
Not connected.
Biasing for the second stage amplifier (post amp).
Output of the second stage amplifier (post amp).
Not connected.
Output of the second stage amplifier (post amp).
Biasing for the second stage amplifier (post amp).
Not connected.
Input for the second stage amplifier (post amp).
Bias input for the second stage amplifier (post amp).
Output of the first stage TIA.
Bypass filtering for TIA Bias
Package Drawing
DS101123
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RFRX8888
Die Pin Out
4 of 14
BIAS
FLTR
TIA
OUT A
20
19
POST AMP POST AMP
BIAS
IN A
18
17
NC
16
TIA IN A
1
15
POST AMP
BIAS A
BIAS 1
2
14
POST AMP
OUT A
NC
3
BIAS 1
4
12
POST AMP
OUT B
TIA IN B
5
11
POST AMP
BIAS B
13
EP
6
7
BIAS
FLTR
TIA
OUT B
8
9
POST AMP POST AMP
IN B
BIAS
NC
10
NC
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support, contact RFMD at (+1) 336-678-5570 or [email protected]
DS101123
RFRX8888
Detailed Functional Block Diagram
TIA IN A
BIAS
FLTR
TIA
OUT A
20
19
POST AMP POST AMP
BIAS
IN A
18
17
NC
16
1
15
POST AMP
BIAS A
14
POST AMP
OUT A
TIA
BIAS 1
2
NC
3
BIAS 1
4
Gain
Block
13
Gain
Block
NC
12
POST AMP
OUT B
11
POST AMP
BIAS B
TIA
TIA IN B
DS101123
5
6
7
BIAS
FLTR
TIA
OUT B
8
9
POST AMP POST AMP
IN B
BIAS
10
NC
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DS101123
Reference Design Schematic
R1
33
L1
470nH
VDD1
C4
Vcc
VDD1
.01uF
FB1
1k
C5
4.7pF
R4
200
B iasB yPass
L9
880nH
Optical Power Sense
R21
C39
.01uF
1K
R26
C21
C22
.01uF
15
14
1
13
PinDriv e 2
12
3
11
16
17
DNI
C11
.01uF
D1 1.5pF
5
21
PinDriv e
R18
47
C20
.01uF
2
C16
.01uF
R20
100
1
2
3
R25
220
4
R28
68K
P4
1
HDR_1X1
FB6
1k
GND
.01uF
C30
1000pF
P2
Vcc_P owerDetect
GND
R38
1K
1
2
Vcc_P owerDetect
V CC
OU T
4
5
6
RF
G ND
EN
G ND
3
1
Enable_PowerDetect
2
RFRX8888
Enable_PowerDetect
R39
100
U3
L T5534
C23
100pF
OUTA
HDR_1X2
P3
V+
-INA
OUTB
+INA
-INB
GND
+INB
L M258
R27
68K
C19
.01uF
Vcc
U2
PinShunt
R19
51K
R24
10K
D3
VDD1
FB5
1k
R22
750
C14
DNI
PinShunt
R15
4.3K
4
C17
4.7pF
R11
DNI
L7
68nH
R13
4.3K
R16
4.7
L 10
0
J2
SMB
GND
D2
C26
R17
27
C9
1000pF
1
1.5pF
C18
56pF
L4
7.5nH
R37
390
R10
200
NC
PostAmp B ias 1
PostAmp I n A
PostAmp Bias B
FB4
1k
1.5K
10K
NC
PostAmp Out B
PostAmp B I n
120pF
R23
19
TI A In B
L5
390nH
NC
8.2pF
C15
PostAmp B ias 2
L8
7.5nH
5
Bias 2
9
C40
PostAmp OutA
R9
11
C6
.01uF
C27
RFRX8888
NC
L 11
0
L2
33nH
R8
11
C13
U1
PostAmp Bias A
10
4
Bias 1
NC
1
3
TI A In A
18
20
R14
20
T I A Out A
2
3
2
FB3
1k
C
GND
1
120pF
A
PD1
PhotoDetector
NC
C12
R12
20
B iasB yPass 6
L6
7.5nH
R7
27
T I A Out B
C10
.01uF
R5
750
C7
56pF
FB2
1k
8
R6
1.5K
7
L3
880nH
C8
180pF
R3
2.7
8
7
6
5
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support, contact RFMD at (+1) 336-678-5570 or [email protected]
R2
33
1
2
C24
0.1uF
GND
HDR_1X2
P5
1
R29
0
C25
0.1uF
HDR_1X1
6 of 14
C2
0.1uF
C3
10uF
3
C1
0.1uF
2
12V
1
1
2
3
P1
HDR_1X2
RFRX8888
Reference Design Layout
DS101123
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RFRX8888
Typical Performance Data
Typical Gain over AGC range
40
35
30
AGC Voltages
0V
3V
25
5.25 V
Gain (dB)
6.25 V
7 25 V
7.25
8.25 V
20
8.75 V
9.25 V
9.75 V
10 25 V
10.25
15
10.65 V
10.95 V
11 15 V
11.15
10
5
0
40
70
100
130
160
190
220
250
280
310
340
370
400
430
460
490
520
550
580
610
640
670
700
730
760
790
820
850
880
910
940
970 1000
Frequency (MHz)
Typical EINC for AGC voltage = 0 V
3.50
3.00
2.50
EINC (pA/Hz)
Series1, 2.2176
2.00
1.50
1.00
0 50
0.50
0.00
40
8 of 14
80
120
160
200
240
280
320
360
400
440
480
520
560
600
640
680
720
760
800
840
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support, contact RFMD at (+1) 336-678-5570 or [email protected]
880
920
960 1000
DS101123
RFRX8888
Typical Performance Data
Typical Composite Triple Beats vs. Frequency
0
-10
-20
-30
-40
dBc
-40 C
25 C
85 C
-50
-60
-70
-80
-90
55.25
77.25
175.25
325.25
Frequency (MHz)
445.25
547.25
Typical Composite Second Order (-) vs. Frequency
0
-10
-20
-30
-40
dBc
-40 C
25 C
-50
85 C
-60
-70
-80
-90
55.25
77.25
175.25
325.25
445.25
547.25
Frequency (MHz)
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RFRX8888
Typical Performance Data
Typical Composite Second Order (+) vs. Frequency
0
-10
-20
-30
-40
dBc
-40 C
25 C
-50
85 C
-60
-70
80
-80
-90
55.25
77.25
175.25
325.25
445.25
547.25
Frequency (MHz)
Typical Modulaon Error Rao vs. Frequency
41.5
41
40.5
40
39.5
dB
-40 C
25 C
85 C
39
38.5
38
37.5
37
651
747
Frequency (MHz)
855
987
NOTE: All measurements performed using a fully operational evaluation board, including photo detector and AGC circuit.
Test conditions: 79 NTSC analog channels (17dBmV at 547.25MHz) and 75QAM256 digital channels (6dB down), equivalent
to virtually 18.4dBmV at 1003MHz. Optical input level +2dBm; AGC voltage adjusted for output level of 23dBmV per channel
at 547.25MHz with 2.6% per channel OMI (measured with complete evaluation board circuit in operation, including PD and
external AGC circuit) . Temperature=25°C .
10 of 14
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DS101123
RFRX8888
|
|
OUTPUT
v
GND
|
v
VDD
v
Application Notes
AGC
Control
Voltage
v
v
| |
|
v
v
|
|
VDD for
Power
Detector
|
v
GND
v
GND
Enable for
Power
Detector
Output of
Power
Detector
For measurements provided in the data sheet,
VDD =13.8V (ensures VDD at input to IC is 12V)
VDD Power Detector=5V
Enable Power Detector=5V
AGC Voltage input=5.25V to 11.2V
DS101123
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RFRX8888
Power up Instructions
Before connecting the 1550nm Optical Source to the SC/APC connector make sure that the board is powered up. To power up
the evaluation board, first connect the RF detector and Main Evaluation Board power and set the appropriate voltages. Pay
close attention to the polarity of the supplies because there is no polarity protection on the evaluation board. It is preferable to
use a dual power supply and operate the circuits independently to power the Main VCC and RF detector VCC. This allows as
close to simultaneous powering of the supplies as possible. Suggested voltage ranges are provided in the following table.
VCC
12V to 15V
VCC RF Detector
2.7V to 5V
Detector Enable (ON)
0.9V to VCC Detector
Detector Enable (OFF)
0V to 0.6V
Fiber Handling Considerations
The Photo diode used on the RFRX8888410 is an analog PIN detector with a 9m core SM fiber pigtail with an SC/APC connector. The board with PIN Photodiode attached needs to be handled with care so the fiber is not damaged in any way. A damaged fiber will result in a non-usable board.
Do not grab the fiber pigtail only and carry the weight of the board by the fiber. This could break the fiber or detach the fiber
from the aligned position with the PIN detector inside the photodiode package.
Do not bend the fiber beyond the specified bend radius (1 inch). All fiber pigtails need to be handled with less than 10N of pull
and less than 1in bend radius.
ESD Precautions
ESD protection is necessary when handling the Evaluation Board. Use of grounding straps, anti-static mats, ESD footwear and
other standard ESD protective garments and equipment are recommended when handling the evaluation board and any other
ESD sensitive equipment.
ESD Protection by Pin Number
Pin
Protection
12 of 14
1
1KV Protection Circuit
2
1KV Protection Circuit
3
NC
4
1KV Protection Circuit
5
1KV Protection Circuit
6
5250W
7
1KV Protection Circuit
8
1KV Protection Circuit
9
1KV Protection Circuit
10
NC
11
6000W
12
1KV Protection Circuit
13
NC
14
1KV Protection Circuit
15
6000W
16
NC
17
1KV Protection Circuit
18
1KV Protection Circuit
19
1KV Protection Circuit
20
5250W
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected]
DS101123
RFRX8888
Application Considerations
The following should be considered when attempting to duplicate the data as shown in this document.
• Typical photo diode pin responsivity should be 0.95 A/W minimum at 1550nm
• Typical photo diode pin capacitance should be approximately 0.65pF
• RF gain tilt was designed to be 4dB typical.
• Gain Control range is currently 30dB as last measured. This is highly dependent on the apps circuit design and layout.
Using the RFRX8888 as Direct Drop in for the TAT6254B/C/D
The RFRX8888 can be tested as a direct drop in for the TAT6254B/C/D. In order to do this the following minor circuit modifications will need to be performed.
• Populate C12 on the BIAS ADJ pins 6 & 20 of the TAT6254C and remove the Bias Sense and Bias adjust circuitry.
The return loss may be different and the frequency response may change. Adjust the input series inductors L3 & L4 to modify
frequency response. Add a 12pf capacitor from the Bias pins 2 and 4 to GND.
The gain tilt is optimized for GPON FIOS™. The values shown are just under 3dB at 1002 MHz where the gain is about 37.6 dB.
By adjusting the input inductors we can get a similar response to the TAT6254B/C/D. An increase of about 2dB will be seen at
1000 MHz
DS101123
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected]
13 of 14
RFRX8888
Digital Matrix Test Setup
14 of 14
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support, contact RFMD at (+1) 336-678-5570 or [email protected]
DS101123
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