AGERE TF1003C

Data Sheet
February 1999
LG1605DXB Limiting Amplifier
Features
■
28 dB gain, 34 dB differential
■
Large dynamic range: >60 dB
■
Wideband response: 8 kHz to 3 GHz
■
Extremely low ±4 ps delay skew across input range
■
Complementary 50 Ω I/Os
■
Surface-mount package
■
Standard ECL supply (400 mW)
Digital video transmission
■
Interface between 1319 receiver and LG1600
clock and data regenerator
■
High-speed comparator
Functional Description
The LG1605DXB is a GaAs wideband limiting amplifier with differential inputs and outputs that provides
28 dB of gain (34 dB differential) and 3 GHz of bandwidth in a 50 Ω environment (Figure 1 shows the
block diagram). At low input levels, below 10 mV to
20 mV, the circuit behaves as a linear amplifier. At
higher levels, the device goes smoothly into limiting.
The device matches the performance of an AGC
amplifier but shows none of the AGC bouncing and
attack characteristics.
Applications
■
■
Data/clock main amplifier SONET/SDH OC-48/
STM-16 transmission systems, DWDM systems
VBR
VSS
8
7
GND
1, 4, 5, 6, 15, 16
110 pF
110 pF
V–REF
V–IN
V+IN
25 kΩ
9
CHIP BOUNDARY
50 Ω
10
+ –
11
+ –
– +
– +
3
2
V–OUT
V+OUT
50 Ω
12
V+REF
25 kΩ
110 pF
–
+
13
VBF
14
VBS
12-3214(F).r3
Figure 1. LG1605DXB Block Diagram
Data Sheet
February 1999
LG1605DXB Limiting Amplifier
Functional Description (continued)
ability to absorb reflections returning from the receiving
end is essential for preventing intersymbol interference
in fiber-optic systems.
The amplifier has a virtually constant output delay for
input signal levels, varying across three decades. As a
result, the device has very low amplitude-to-phase conversion, which makes it ultimately suitable for applications in highly sensitive fiber-optic systems. Although
the amplifier is most sensitive when the input is ac coupled (see Figure 3), a low offset (<25 mV) and a large
common-mode input range of 2 V make it useful in
applications that require a high-speed comparator as
well.
The amplifier is a natural step-up interface between
receivers, such as the Lucent Technologies Microeletronics Group Optoelectronics unit 1319 and regenerators like the Lucent Technologies Microelectronics
Group LG1600. The referred wideband input noise
(168 µVrms typical) allows for a <1e–9 bit error rate
(BER) for inputs down to 2 mVp-p (S/N ratio of
21.5 dB).
In SAW based clock recovery systems, with clock frequencies as high as 2.5 GHz, the device can provide a
clock-limiting function in systems.
A unique input coupling arrangement allows for a frequency response down into the low kHz range while
using coupling capacitors that are small enough to
maintain a good input return loss at high frequencies.
The LG1605DXB is available in a hermetically sealed,
16-lead, glass-metal surface-mount package and uses
a standard ECL supply.
The outputs, when ac coupled, provide a good RF termination up to very high frequencies. The associated
Pin Information
The pinout for the LG1605DXB is shown in Figure 2.
VBF
GND GND VBS
16
15
14
13
1
12
GND
V+REF
2
11
3
10
4
9
V+OUT
V+IN
V–OUT
V–IN
V–REF
GND
5
6
7
GND GND VSS
8
VBR
12-3223(F)
Figure 2. Pin Diagram
2
Lucent Technologies Inc.
Data Sheet
February 1999
LG1605DXB Limiting Amplifier
Pin Information (continued)
The pin descriptions for the LG1605DXB are given in Table 1.
Table 1. Pin Descriptions
Pin
Symbol
2
3
7
8
V+OUT
V–OUT
VSS
VBR
9
V–REF
10
V–IN
11
12
13
14
V+IN
V+REF
VBF
VBS
1, 4, 5, 6,
15, 16,
Package
Back
GND
Lucent Technologies Inc.
Name/Description
Positive Data Output.
Negative Data Output.
dc Supply Voltage.
Bias Reference Voltage. Connect to nominal –1.5 V stable voltage reference, bypassed to GND with a capacitor ≥0.047 µF.
Data Negative Reference. Internally bypassed with 110 pF. Broadband
operation requires up-close external bypassing with a capacitor ≥0.047 µF,
matching the input coupling capacitor.
Negative Data Input. Requires ac-coupling capacitor and 50 Ω source or
termination.
Positive Data Input.
Data Positive Reference. See pin 9 above.
Bias Force Voltage. Obsolete function, do not connect.
Bias Sense Voltage. Internal test point, tracking VBR. Normally not connected.
Ground. For optimum performance, package back should contact board
ground plane. (See the Mounting and Connections section.)
3
Data Sheet
February 1999
LG1605DXB Limiting Amplifier
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent or latent damage to the device. These
are absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in
excess of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings for
extended periods can adversely affect device reliability.
Table 2. Absolute Maximum Ratings
Parameter
Min
Max
Unit
Supply Voltage Range (VSS)
–7
0.5
V
Power Dissipation
—
1
W
Voltage (all pins)
VSS
0.5
V
V+REF – V+IN
—
±2
V
V–REF – V–IN
—
±2
V
–40
125
°C
0
100
°C
Storage Temperature Range
Operating Case Temperature Range
Recommended Operating Conditions
Table 3. Recommended Operating Conditions
Parameter
Symbol
Case Temperature
Power Supply
Min
Max
Unit
tCASE
0
70
°C
VSS
–5.7
–4.7
V
Handling Precautions
Although protection circuitry has been designed into this device, proper precautions should be taken to avoid exposure to electrostatic discharge (ESD) during handling and mounting. Lucent employs a human-body model (HBM)
and a charged-device model (CDM) for ESD-susceptibility testing and protection design evaluation. No industrywide standard has been adopted for the CDM. However, a standard HBM (resistance = 1500 Ω , capacitance =
100 pF) is widely used and, therefore, can be used for comparison purposes. The HBM ESD threshold presented
here was obtained by using these circuit parameters.
Table 4. ESD Threshold
HBM ESD Threshold
Device
Voltage
LG1605DXB
≥200 V
Mounting and Connections
Certain precautions must be taken when using solder. For installation using a constant temperature solder, temperatures of under 300 °C may be employed for periods of time up to 5 s, maximum. For installation with a soldering
iron (battery operated or nonswitching only), the soldering tip temperature should not be greater than 300 °C and
the soldering time for each lead must not exceed 5 s. This device is supplied with solder on the back of the package. Due to the high gain of the device, it is recommended to solder the back of the package to ground.
4
Lucent Technologies Inc.
Data Sheet
February 1999
LG1605DXB Limiting Amplifier
Mounting and Connections (continued)
Lucent Technologies/FORCE ICs assembly procedure recommendations for the LG1605DXB are as follows:
■
Board solder pattern for the 1605DXB package base should not exceed 50% of the package base area.
■
Back lighting can be used during the pick and place operation to silhouette the package in order to eliminate
reflection problems with the solder on the bottom.
■
Set the lead spacing tolerance to ±0.012 in.
■
Insertion pressure should not exceed 125 g.
Electrical Characteristics
tCASE = 0 °C to 70 °C, VBR = –1.5 V, VSS = –4.7 V to –5.7 V, bit rate = 2.488 Mbits/s NRZ, and data pattern =
223 – 1 PRBS, unless otherwise indicated.
Note: Minimum and maximum values are testing requirements. Typical values are characteristics of the device and
are the result of engineering evaluations. Typical values are for information purposes only and are not part of
the testing requirements.
Parameter
Data Input Voltage2
Data Input Voltage2
Input Offset Voltage
Common-mode Input
Voltage Range
Output Voltage
Output Pulse Width
Relative to Bit Period
Small-signal Output
Transition Time
Small-signal Gain
Small-signal –3 dB
Bandwidth
Low-frequency –3 dB
Cut-off2
Supply Current
Noise Figure2
Input Referred Wideband
Noise
Thermal Resistance
Symbol
V±IN
V+IN – V–IN
V+REF – V–REF
VCMIN
V±OUT
PW%
tr, tf
G
f3dB
fLF
ISS
NF
Vnr
θJC
Conditions1
Single-ended source
Differential source
40 °C/–5.2 V; 70 °C/–5.7 V
25 °C, VSS = –5.2 V,
dc input coupling
—
Measured on V+OUT,
@ 40 °C and 70 °C
25 °C, 20% to 80%,
VIN = 8 mVp-p
40 °C to 70 °C, V IN =
8 mVp-p
25 °C, VIN = 8 mVp-p
Min
—
—
—
—
Typ
—
—
—
–2 to –4
Max
800
1600
25
—
Unit
mVp-p
mVp-p
mV
V
400
90
550
100
—
110
mVp-p
%
—
100
—
ps
26
28
35
dB
—
3
—
GHz
VIN = 8 mVp-p, input coupling
and bypassing as in Figure 3
—
25 °C, single-ended input
25 °C, single-ended input,
7 kHz—18 GHz
Junction to case
—
2.5
8
kHz
—
—
—
85
15
168
100
16
—
mA
dB
µVrms
—
30
—
°C/W
1. All temperatures are case temperature, tCASE.
2. Parameter guaranteed by design or characterization and not production tested.
Lucent Technologies Inc.
5
Data Sheet
February 1999
LG1605DXB Limiting Amplifier
Test Circuit
1.5 V +
RINT ≤ 10 kΩ
(SEE NOTE 1)
+
5.2 V
TF1003C FIXTURE BOUNDARY
0.047 µF
LG1605DXB
5Ω
VSS
7
VBR
8
GND
1, 4, 5, 6, 15, 16
110 pF
0.047 µF
5Ω
0.047 µF
50 Ω
50 Ω
0.047 µF
110 pF
V–REF
9
V–IN
10
V+IN
11
25 kΩ
50 Ω
+ –
+ –
– +
– +
3
V–OUT
2
V+OUT
0.047 µF
50 Ω
V+REF 12
5Ω
CHIP BOUNDARY
0.047 µF
50 Ω
25 kΩ
110 pF
0.047 µF
–
50 Ω
+
LOAD
(SEE NOTE 2)
SOURCE
13
VBF
14
VBS
12-3215(F)r.6
1. Depending on the desired supply rejection, VBR can be biased with a simple resistive divider, or resistor/zener diode network.
Alternatively, when the LG1605DXB is followed by the LG1600 clock and data regenerator, a resistive divider with bypassing capacitor may
be connected to pin 7 (VREF) of the LG1600 (VREF ≈ –3.2 V). This arrangement provides excellent temperature stability and power supply
rejection.
2. The outputs may be either ac coupled, as indicated, or dc terminated into 50 Ω. In the first case, good output return loss (see Figure 8) can be
obtained. The latter configuration provides a 0 mV to –600 mV output swing (when limiting) for easy interface to dc-coupled circuits. No input
coupling capacitors are needed when interfacing with the LG1600 or the 1319 receiver.
Figure 3. LG1605DXB Test Circuit (with TF1003C Test Fixture)
0.047 µF
(SEE NOTE 1)
0.047 µF
(SEE NOTE 1)
12 kΩ
13.6 kΩ
VREF
≈ –3.2 V
8.2 kΩ
20 kΩ
VSS
–5.2 V
(PIN 7 LG1600)
VBR
–1.5 V
A. Using LG1600 Reference Voltage
VBR
–1.5 V
B. Using Supply Voltage
12-3216(F)r.3
1. Depending on the desired supply rejection, VBR can be biased with a simple resistive divider, or resistor/zener diode network.
Alternatively, when the LG1605DXB is followed by the LG1600 clock and data regenerator, a resistive divider with bypassing capacitor may
be connected to pin 7 (VREF) of the LG1600 (VREF ≈ –3.2 V). This arrangement provides excellent temperature stability and power supply
rejection.
Figure 4. Bias Options
6
Lucent Technologies Inc.
Data Sheet
February 1999
LG1605DXB Limiting Amplifier
Typical Performance Characteristics
0
(at TA = 25 °C)
–10
ISOLATION S12 (dB)
INPUT RETURN LOSS S11 (dB)
0
–5
–10
–15
–20
–25
–20
–30
–40
–50
–60
–70
–30
–80
0
–35
1
2
3
4
5
FREQUENCY (GHz)
–40
0
1
2
3
4
5
12-3219(F)
Figure 7. Isolation S12
FREQUENCY (GHz)
12-3217(F)
Figure 5. Input Return Loss S11
OUTPUT RETURN LOSS S22 (dB)
0
40
35
GAIN S21 (dB)
30
25
20
15
10
–5
–10
–15
–20
–25
–30
–35
–40
0
5
1
2
3
4
5
FREQUENCY (GHz)
0
0
1
2
3
4
5
12-3220(F)
Figure 8. Output Return Loss S22
FREQUENCY (GHz)
12-3218(F)
Figure 6. Gain S21
HORIZONTAL: 100 ps/div, VERTICAL: 12 mV/div; VIN = 2.23 mVp-p, VOUT = 58.8 mVp-p, σ = 4.45 mVrms
Figure 9. Output Noise Histogram
Lucent Technologies Inc.
7
Data Sheet
February 1999
LG1605DXB Limiting Amplifier
Typical Performance Characteristics (at TA = 25 °C) (continued)
6 mVp-p
VERTICAL: 200 mV/div
12 mVp-p
VERTICAL: 200 mV/div
50 mVp-p
VERTICAL: 200 mV/div
400 mVp-p
VERTICAL: 200 mV/div
800 mVp-p
HORIZONTAL: 100 ps/div
VERTICAL: 200 mV/div
HORIZONTAL: 100 ps/div
A. Input Voltage
B. Output Voltage
1000
10
6
RELATIVE DELAY (ps)
OUTPUT VOLTAGE (mVp-p)
8
100
4
2
0
–2
–4
–6
–8
10
–10
1
10
100
1000
1
10
INPUT VOLTAGE (mVp-p)
100
INPUT VOLTAGE (mVp-p)
12-3221(F)
C. Output vs. Input
1000
12-3222(F)
D. Input-to-Output Relative Delay
Figure 10. Limiting Characteristics
8
Lucent Technologies Inc.
Data Sheet
February 1999
LG1605DXB Limiting Amplifier
Outline Diagram
16-Pin, Glass-Metal, Surface-Mount Package
Dimensions are in inches.
0.230 SQ REF
13
1
0.030 TYP
9
0.012 TYP
5
0.366 ± 0.007
0.005
+
+
DETAIL A
R0.013
0.050 MAX
0—4°
0.000—0.004
0.020
DETAIL A
12-3224(F).b
Lucent Technologies Inc.
9
Data Sheet
February 1999
LG1605DXB Limiting Amplifier
Ordering Information
10
Device Code
Package
Temperature
Comcode
(Ordering Number)
LG1605DXB-TR16
Package on 16 mm tape and reel
0 °C to 70 °C
107142614
LG1605DXB-FLP
Package in flat pack container
0 °C to 70 °C
107412025
TF1003C
Test fixture
—
106990138
Lucent Technologies Inc.
Data Sheet
February 1999
LG1605DXB Limiting Amplifier
Appendix
The test fixture mentioned in the data sheet is sold separately and is described in detail below.
5-7208(F).r1
Note: Dot on test fixture lid indicates position of pin 1.
Figure 11. TF1003C Test Fixture
FIXTURE BOUNDARY
V+IN
PACKAGE OUTLINE
V–IN
5Ω
0.047 µF
0.047 µF
5Ω
0.047 µF
12
11
0.047 µF
10
9
13
8
VBR
VBS
14
7
VSS
15
6
16
5Ω
5
1
2
V+OUT
3
0.047 µF
VBF
4
V–OUT
5-7209(F)
Figure 12. TF1003C Electrical Diagram
Lucent Technologies Inc.
11
Data Sheet
February 1999
LG1605DXB Limiting Amplifier
Appendix (continued)
(11)
V+IN
(10)
V–IN
(13) VBF
VBR (8)
(14) VBS
VSS (7)
(2)
V+OUT
(3)
V–OUT
5-7210(F)
Figure 13. TF1003C Connector Assignment (Pressure ring not shown.)
For additional information, contact your Microelectronics Group Account Manager or the following:
http://www.lucent.com/micro
INTERNET:
[email protected]
E-MAIL:
N. AMERICA: Microelectronics Group, Lucent Technologies Inc., 555 Union Boulevard, Room 30L-15P-BA, Allentown, PA 18103
1-800-372-2447, FAX 610-712-4106 (In CANADA: 1-800-553-2448, FAX 610-712-4106)
ASIA PACIFIC: Microelectronics Group, Lucent Technologies Singapore Pte. Ltd., 77 Science Park Drive, #03-18 Cintech III, Singapore 118256
Tel. (65) 778 8833, FAX (65) 777 7495
CHINA:
Microelectronics Group, Lucent Technologies (China) Co., Ltd., A-F2, 23/F, Zao Fong Universe Building, 1800 Zhong Shan Xi Road, Shanghai
200233 P. R. China Tel. (86) 21 6440 0468, ext. 316, FAX (86) 21 6440 0652
JAPAN:
Microelectronics Group, Lucent Technologies Japan Ltd., 7-18, Higashi-Gotanda 2-chome, Shinagawa-ku, Tokyo 141, Japan
Tel. (81) 3 5421 1600, FAX (81) 3 5421 1700
EUROPE:
Data Requests: MICROELECTRONICS GROUP DATALINE: Tel. (44) 1189 324 299, FAX (44) 1189 328 148
Technical Inquiries:GERMANY: (49) 89 95086 0 (Munich), UNITED KINGDOM: (44) 1344 865 900 (Ascot),
FRANCE: (33) 1 40 83 68 00 (Paris), SWEDEN: (46) 8 594 607 00 (Stockholm), FINLAND: (358) 9 4354 2800 (Helsinki),
ITALY: (39) 02 6608131 (Milan), SPAIN: (34) 1 807 1441 (Madrid)
Lucent Technologies Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No
rights under any patent accompany the sale of any such product(s) or information. FASTCAT is a trademark of Lucent Technologies Inc.
Copyright © 1999 Lucent Technologies Inc.
All Rights Reserved
February 1999
DS98-400HSPL (Replaces DS96-236FCE)