Exar CLC3605 1.5ghz amplifier Datasheet

Data Sheet
Comlinear CLC1605, CLC2605, CLC3605
®
1.5GHz Amplifiers
The COMLINEAR CLC1605 (single), CLC2605 (dual), and CLC3605 (triple)
are high-performance, current feedback amplifiers that provide 1.5GHz unity
gain bandwidth, ±0.1dB gain flatness to 120MHz, and 2,500V/μs slew rate.
This high performance exceeds the requirements of high-definition television
(HDTV) and other multimedia applications. These COMLINEAR highperformance amplifiers also provide ample output current to drive multiple
video loads.
The COMLINEAR CLC1605, CLC2605, and CLC3605 are designed to operate
from ±5V or +5V supplies. The CLC3605 offers a fast enable/disable feature
to save power. While disabled, the outputs are in a high-impedance state
to allow for multiplexing applications. The combination of high-speed, lowpower, and excellent video performance make these amplifiers well suited
for use in many general purpose, high-speed applications including highdefinition video, imaging applications, and radar/communications receivers.
APPLICATIONS
n RGB video line drivers
n High definition video driver
n Video switchers and routers
n ADC buffer
n Active filters
n High-speed instrumentation
n Wide dynamic range IF amp
n Radar/communication receivers
Typical Application - Driving Dual Video Loads
+Vs
75Ω
Cable
Input
75Ω
75Ω
Cable
Output A
75Ω
Rg
75Ω
Rev 1E
75Ω
Rf
75Ω
Cable
Output B
75Ω
-Vs
Ordering Information
Part Number
Package
Pb-Free
RoHS Compliant
Operating Temperature Range
Packaging Method
CLC1605IST5X
SOT23-5
Yes
Yes
-40°C to +85°C
Reel
CLC2605ISO8X*
SOIC-8
Yes
Yes
-40°C to +85°C
Reel
CLC3605ISO16X
SOIC-16
Yes
Yes
-40°C to +85°C
Reel
Moisture sensitivity level for all parts is MSL-1. *Preliminary.
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
Comlinear CLC1605, CLC2605, CLC3605 1.5GHz Amplifiers
General Description
FEATURES
n 0.1dB gain flatness to 120MHz
n 0.01%/0.01˚ differential gain/phase
n 1.2GHz -3dB bandwidth at G = 2
n 700MHz large signal bandwidth
n 2,500V/μs slew rate
n 3.7nV/√Hz input voltage noise
n 120mA output current
n Triple offers disable
n Fully specified at 5V and ±5V supplies
n CLC1605: Pb-free SOT23-5
n CLC2605: Pb-free SOIC-8
n CLC3605: Pb-free SOIC-16
www.exar.com
Tel. +1 510 668-7000 - Fax. +1 510 668-7001
Data Sheet
CLC1605 Pin Configuration
1
-V S
2
+IN
3
+VS
5
+
-IN
4
CLC2605 Pin Configuration
OUT1
1
-IN1
2
+IN1
3
-Vs
4
+
+
8
+Vs
7
OUT2
6
-IN2
5
+IN2
CLC3605 Pin Configuration
Pin No.
Pin Name
1
OUT
Output
2
-VS
Negative supply
3
+IN
Positive input
4
-IN
Negative input
5
+VS
Positive supply
CLC2605 Pin Assignments
Pin No.
Pin Name
1
OUT1
Output, channel 1
2
-IN1
Negative input, channel 1
3
+IN1
Positive input, channel 1
-VS
5
+IN2
DIS1
+IN1
2
15
OUT1
-VS
3
14
+VS
-IN2
4
13
DIS2
+IN2
5
12
OUT2
-VS
6
11
+VS
+IN3
7
10
OUT3
-IN3
8
9
DIS3
Negative supply
Positive input, channel 2
6
-IN2
Negative input, channel 2
7
OUT2
Output, channel 2
8
+VS
Positive supply
CLC3605 Pin Configuration
Pin Name
Description
1
-IN1
Negative input, channel 1
2
+IN1
Positive input, channel 1
3
-VS
Negative supply
4
-IN2
Negative input, channel 2
5
+IN2
Positive input, channel 2
6
-VS
7
+IN3
Positive input, channel 3
8
-IN3
Negative input, channel 3
9
DIS3
Disable pin. Enabled if pin is grounded, left floating or
pulled below VON, disabled if pin is pulled above VOFF.
10
OUT3
Output, channel 3
Negative supply
11
+VS
12
OUT2
Positive supply
Output, channel 2
13
DIS2
Disable pin. Enabled if pin is grounded, left floating or
pulled below VON, disabled if pin is pulled above VOFF.
14
+VS
Positive supply
15
OUT1
Output, channel 1
16
DIS1
Disable pin. Enabled if pin is grounded, left floating or
pulled below VON, disabled if pin is pulled above VOFF.
Disable Pin Truth Table
Pin
High
Low*
DIS
Disabled
Enabled
*Default Open State
©2007-2013 Exar Corporation 2/21
Rev 1E
Rev 1E
-IN1
16
Description
4
Pin No.
1
Description
Comlinear CLC1605, CLC2605, CLC3605 1.5GHz Amplifiers
OUT
CLC1605 Pin Assignments
Data Sheet
Absolute Maximum Ratings
The safety of the device is not guaranteed when it is operated above the “Absolute Maximum Ratings”. The device
should not be operated at these “absolute” limits. Adhere to the “Recommended Operating Conditions” for proper device function. The information contained in the Electrical Characteristics tables and Typical Performance plots reflect the
operating conditions noted on the tables and plots.
Supply Voltage
Input Voltage Range
Continuous Output Current
Min
Max
Unit
0
-Vs -0.5V
14
+Vs +0.5V
120
V
V
mA
Comlinear CLC1605, CLC2605, CLC3605 1.5GHz Amplifiers
Parameter
Reliability Information
Parameter
Min
Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10s)
Package Thermal Resistance
5-Lead SOT23
8-Lead SOIC
16-Lead SOIC
Typ
-65
Max
Unit
150
150
260
°C
°C
°C
221
100
68
°C/W
°C/W
°C/W
Notes:
Package thermal resistance (qJA), JDEC standard, multi-layer test boards, still air.
ESD Protection
Product
SOT23-5
SOIC-16
2kV
1kV
2kV
1kV
Human Body Model (HBM)
Charged Device Model (CDM)
(1)
Notes:
1. 0.8kV between the input pairs +IN and -IN pins only. All other pins are 2kV.
Recommended Operating Conditions
Min
Operating Temperature Range
Supply Voltage Range
-40
4.5
©2007-2013 Exar Corporation 3/21
Typ
Max
Unit
+85
12
°C
V
Rev 1E
Parameter
Rev 1E
Data Sheet
Electrical Characteristics at +5V
TA = 25°C, Vs = +5V, Rf = Rg =330Ω, RL = 150Ω to VS/2, G = 2; unless otherwise noted.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Frequency Domain Response
Unity Gain Bandwidth
G = +1, VOUT = 0.5Vpp, Rf = 499Ω
1250
MHz
BWSS
-3dB Bandwidth
G = +2, VOUT = 0.5Vpp
1000
MHz
BWLS
Large Signal Bandwidth
G = +2, VOUT = 1Vpp
825
MHz
BW0.1dBSS
0.1dB Gain Flatness
G = +2, VOUT = 0.5Vpp
100
MHz
BW0.1dBLS
0.1dB Gain Flatness
G = +2, VOUT = 1Vpp
100
MHz
Time Domain Response
tR, tF
Rise and Fall Time
VOUT = 1V step; (10% to 90%)
0.6
ns
tS
Settling Time to 0.1%
VOUT = 1V step
10
ns
OS
Overshoot
VOUT = 0.2V step
1
%
SR
Slew Rate
2V step
1350
V/µs
Distortion/Noise Response
HD2
2nd Harmonic Distortion
VOUT = 1Vpp, 5MHz
-75
dBc
HD3
3rd Harmonic Distortion
VOUT = 1Vpp, 5MHz
-85
dBc
THD
Total Harmonic Distortion
VOUT = 1Vpp, 5MHz
74
dB
DG
Differential Gain
NTSC (3.58MHz), AC-coupled, RL = 150Ω
0.04
%
DP
Differential Phase
NTSC (3.58MHz), AC-coupled, RL = 150Ω
0.01
°
IP3
Third Order Intercept
VOUT = 1Vpp, 10MHz
37
dBm
SFDR
Spurious Free Dynamic Range
VOUT = 1Vpp, 5MHz
61
dBc
en
Input Voltage Noise
> 1MHz
3.7
nV/√Hz
in
Input Current Noise
> 1MHz, Inverting
20
pA/√Hz
> 1MHz, Non-Inverting
30
pA/√Hz
XTALK
Crosstalk
Channel-to-channel 5MHz, VOUT = 2Vpp
60
dB
DC Performance
VIO
Input Offset Voltage
0
mV
dVIO
Average Drift
1.6
µV/°C
Ibn
dIbn
Ibi
Average Drift
Input Bias Current - Inverting
Average Drift
3
µA
7
nA/°C
6
µA
20
nA/°C
PSRR
Power Supply Rejection Ratio
DC
58
dB
IS
Supply Current
per channel
11
mA
ns
Disable Characteristics - CLC3605 only
TON
Turn On Time
23
TOFF
Turn Off Time
350
ns
OFFIOS
Off Isolation
5MHz, VOUT = 2Vpp
75
dB
VOFF
Power Down Input Voltage
DIS pin, disabled if pin is pulled above VOFF
Disabled if DIS > 1.5V
V
VON
Enable Input Voltage
DIS pin, enabled if pin is grounded, left open
or pulled below VON
Enabled if DIS < 0.5V
V
ISD
Disable Supply Current
DIS pin is pulled to VS
0.09
mA
Non-inverting
150
kΩ
Inverting
70
Ω
1.0
pF
1.5 to
3.5
V
50
dB
Input Characteristics
RIN
Input Resistance
CIN
Input Capacitance
CMIR
Common Mode Input Range
CMRR
Common Mode Rejection Ratio
DC
©2007-2013 Exar Corporation 4/21
Rev 1E
Rev 1E
dIbi
Input Bias Current - Non-Inverting
Comlinear CLC1605, CLC2605, CLC3605 1.5GHz Amplifiers
UGBW
Data Sheet
Electrical Characteristics at +5V continued
TA = 25°C, Vs = +5V, Rf = Rg =330Ω, RL = 150Ω to VS/2, G = 2; unless otherwise noted.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Output Characteristics
Output Resistance
Closed Loop, DC
VOUT
Output Voltage Swing
RL = 150Ω
IOUT
Output Current
0.1
Ω
1.5 to
3.5
V
±120
mA
Notes:
1. 100% tested at 25°C
Comlinear CLC1605, CLC2605, CLC3605 1.5GHz Amplifiers
RO
Rev 1E
©2007-2013 Exar Corporation 5/21
Rev 1E
Data Sheet
Electrical Characteristics at ±5V
TA = 25°C, Vs = ±5V, Rf = Rg =330Ω, RL = 150Ω to GND, G = 2; unless otherwise noted.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Frequency Domain Response
Unity Gain Bandwidth
G = +1, VOUT = 0.5Vpp, Rf = 499Ω
1500
MHz
BWSS
-3dB Bandwidth
G = +2, VOUT = 0.5Vpp
1200
MHz
BWLS
Large Signal Bandwidth
G = +2, VOUT = 2Vpp
700
MHz
BW0.1dBSS
0.1dB Gain Flatness
G = +2, VOUT = 0.5Vpp
120
MHz
BW0.1dBLS
0.1dB Gain Flatness
G = +2, VOUT = 2Vpp
120
MHz
0.65
ns
ns
Time Domain Response
tR, tF
Rise and Fall Time
VOUT = 2V step; (10% to 90%)
tS
Settling Time to 0.1%
VOUT = 2V step
13
OS
Overshoot
VOUT = 0.2V step
1
%
SR
Slew Rate
2V step
2500
V/µs
Distortion/Noise Response
HD2
2nd Harmonic Distortion
VOUT = 2Vpp, 5MHz
-73
dBc
HD3
3rd Harmonic Distortion
VOUT = 2Vpp, 5MHz
-85
dBc
THD
Total Harmonic Distortion
VOUT = 2Vpp, 5MHz
72
dB
DG
Differential Gain
NTSC (3.58MHz), AC-coupled, RL = 150Ω
0.01
%
DP
Differential Phase
NTSC (3.58MHz), AC-coupled, RL = 150Ω
0.01
°
IP3
Third Order Intercept
VOUT = 2Vpp, 10MHz
42
dBm
SFDR
Spurious Free Dynamic Range
VOUT = 1Vpp, 5MHz
73
dBc
en
Input Voltage Noise
> 1MHz
3.7
nV/√Hz
in
Input Current Noise
> 1MHz, Inverting
20
pA/√Hz
> 1MHz, Non-Inverting
30
pA/√Hz
XTALK
Crosstalk
Channel-to-channel 5MHz
60
dB
DC Performance
VIO
dVIO
Ibn
dIbn
Ibi
-10
Average Drift
0
10
1.6
Input Bias Current - Non-Inverting (1)
-40
Average Drift
19
40
7
Input Bias Current - Inverting (1)
-35
Average Drift
Power Supply Rejection Ratio (1)
DC
IS
Supply Current (1)
per channel
40
µA
nA/°C
6
35
20
PSRR
mV
µV/°C
µA
nA/°C
60
dB
12
18
mA
Disable Characteristics - CLC3605 only
TON
Turn On Time
35
TOFF
Turn Off Time
410
ns
ns
OFFIOS
Off Isolation
5MHz, VOUT = 2Vpp
75
dB
VOFF
Power Down Input Voltage
DIS pin, disabled if pin is pulled above VOFF
Disabled if DIS > 3V
V
VON
Enable Input Voltage
DIS pin, enabled if pin is grounded, left open
or pulled below VON
Enabled if DIS < 1V
V
ISD
Disable Supply Current (1)
per channel, DIS pin is pulled to VS
0.1
Non-inverting
150
Inverting
70
Ω
1.0
pF
0.3
mA
Input Characteristics
RIN
Input Resistance
CIN
Input Capacitance
CMIR
Common Mode Input Range
CMRR
Common Mode Rejection Ratio (1)
DC
©2007-2013 Exar Corporation 40
6/21
kΩ
±4.0
V
55
dB
Rev 1E
Rev 1E
dIbi
Input Offset Voltage (1)
Comlinear CLC1605, CLC2605, CLC3605 1.5GHz Amplifiers
UGBW
Data Sheet
Electrical Characteristics at ±5V continued
TA = 25°C, Vs = ±5V, Rf = Rg =330Ω, RL = 150Ω to GND, G = 2; unless otherwise noted.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Output Characteristics
Output Resistance
Closed Loop, DC
VOUT
Output Voltage Swing
RL = 150Ω
IOUT
Output Current
0.1
±3.0
(1)
Ω
±3.8
V
±280
mA
Notes:
1. 100% tested at 25°C
Comlinear CLC1605, CLC2605, CLC3605 1.5GHz Amplifiers
RO
Rev 1E
©2007-2013 Exar Corporation 7/21
Rev 1E
Data Sheet
Typical Performance Characteristics
TA = 25°C, Vs = ±5V, Rf = Rg =330Ω, RL = 150Ω to GND, G = 2; unless otherwise noted.
Non-Inverting Frequency Response
Normalized Gain (dB)
G=2
G=5
G = 10
-6
G = -2
-1
0
-3
G = -1
0
G=1
Rf = 750Ω
G = -5
-2
-3
G = -10
-4
-5
-6
VOUT = 0.5Vpp
-9
VOUT = 0.5Vpp
-7
0.1
1
10
100
1000
0.1
1
Frequency (MHz)
Frequency Response vs. CL
1000
5
4
0
3
CL = 1000pF
Rs = 3.3Ω
-1
Normalized Gain (dB)
Normalized Gain (dB)
100
Frequency Response vs. RL
1
CL = 500pF
Rs = 5Ω
-2
-3
CL = 100pF
Rs = 10Ω
-4
CL = 50pF
Rs = 15Ω
-5
-6
CL = 20pF
Rs = 20Ω
VOUT = 0.5Vpp
2
1
0
-1
RL = 100Ω
-2
-3
RL = 50Ω
-4
VOUT = 0.5Vpp
-5
-7
RL = 25Ω
-6
0.1
1
10
100
1000
0.1
1
Frequency (MHz)
10
100
1000
Frequency (MHz)
Rev 1E
Frequency Response vs. VOUT
Frequency Response vs. Temperature
1
2
0
1
0
-1
Normalized Gain (dB)
Normalized Gain (dB)
10
Frequency (MHz)
VOUT = 4Vpp
-2
-3
VOUT = 2Vpp
-4
VOUT = 1Vpp
-5
-1
+ 25degC
-2
- 40degC
-3
+ 85degC
-4
-5
-6
VOUT = 0.2Vpp
-6
-7
-7
0.1
1
10
100
1000
0.1
Frequency (MHz)
©2007-2013 Exar Corporation 1
10
100
1000
10000
Frequency (MHz)
8/21
Comlinear CLC1605, CLC2605, CLC3605 1.5GHz Amplifiers
1
G=1
Rf = 499Ω
3
Normalized Gain (dB)
Inverting Frequency Response
Rev 1E
Data Sheet
Typical Performance Characteristics
TA = 25°C, Vs = ±5V, Rf = Rg =330Ω, RL = 150Ω to GND, G = 2; unless otherwise noted.
Non-Inverting Frequency Response at VS = 5V
Normalized Gain (dB)
G=2
G=5
G = 10
-6
G = -2
-1
0
-3
G = -1
0
G=1
Rf = 750Ω
G = -5
-2
-3
G = -10
-4
-5
-6
VOUT = 0.5Vpp
-9
VOUT = 0.5Vpp
-7
0.1
1
10
100
1000
0.1
1
Frequency (MHz)
Frequency Response vs. CL at VS = 5V
1000
3
2
0
CL = 1000pF
Rs = 3.3Ω
-1
1
Normalized Gain (dB)
Normalized Gain (dB)
100
Frequency Response vs. RL at VS = 5V
1
CL = 500pF
Rs = 5Ω
-2
-3
CL = 100pF
Rs = 10Ω
-4
CL = 50pF
Rs = 15Ω
-5
-6
VOUT = 0.5Vpp
0
-1
RL = 100Ω
-2
RL = 50Ω
-3
-4
CL = 20pF
Rs = 20Ω
RL = 25Ω
VOUT = 0.5Vpp
-5
-7
-6
0.1
1
10
100
1000
0.1
1
Frequency (MHz)
10
100
1000
Frequency (MHz)
Rev 1E
Frequency Response vs. VOUT at VS = 5V
Frequency Response vs. Temperature at VS = 5V
1
2
0
1
0
-1
VOUT = 3Vpp
Normalized Gain (dB)
Normalized Gain (dB)
10
Frequency (MHz)
-2
-3
VOUT = 2Vpp
-4
VOUT = 1Vpp
-5
-1
-2
+ 25degC
-3
- 40degC
-4
+ 85degC
-5
-6
VOUT = 0.2Vpp
-6
-7
-7
0.1
1
10
100
1000
0.1
Frequency (MHz)
©2007-2013 Exar Corporation 1
10
100
1000
10000
Frequency (MHz)
9/21
Comlinear CLC1605, CLC2605, CLC3605 1.5GHz Amplifiers
1
G=1
Rf = 499Ω
3
Normalized Gain (dB)
Inverting Frequency Response at VS = 5V
Rev 1E
Data Sheet
Typical Performance Characteristics - Continued
TA = 25°C, Vs = ±5V, Rf = Rg =330Ω, RL = 150Ω to GND, G = 2; unless otherwise noted.
Gain Flatness at VS = 5V
0.1
0
0
Normalized Gain (dB)
0.1
-0.1
-0.2
-0.3
VOUT = 2Vpp
RL = 150Ω
Rf = 330Ω
-0.4
-0.1
-0.2
-0.3
VOUT = 2Vpp
RL = 150Ω
Rf = 330Ω
-0.4
-0.5
-0.5
0.1
1
10
100
1000
0.1
1
Frequency (MHz)
-3dB Bandwidth vs. VOUT
1000
1200
1100
1600
1000
1400
-3dB Bandwidth (MHz)
-3dB Bandwidth (MHz)
100
-3dB Bandwidth vs. VOUT at VS = 5V
1800
1200
1000
800
600
900
800
700
600
500
400
400
300
200
200
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0.0
0.5
VOUT (VPP)
1.0
1.5
2.0
2.5
3.0
VOUT (VPP)
Rev 1E
Closed Loop Output Impedance vs. Frequency
Input Voltage Noise
10
25
Input Voltage Noise (nV/√Hz)
VS = ±5.0V
Output Resistance (Ω)
10
Frequency (MHz)
1
0.1
0.01
10K
100K
1M
10M
15
10
5
0.001
0.01
0.1
1
10
Frequency (MHz)
Frequency (Hz)
©2007-2013 Exar Corporation 20
0
0.0001
100M
10/21
Comlinear CLC1605, CLC2605, CLC3605 1.5GHz Amplifiers
Normalized Gain (dB)
Gain Flatness
Rev 1E
Data Sheet
Typical Performance Characteristics - Continued
TA = 25°C, Vs = ±5V, Rf = Rg =330Ω, RL = 150Ω to GND, G = 2; unless otherwise noted.
2nd Harmonic Distortion vs. RL
3rd Harmonic Distortion vs. RL
-65
-60
-70
RL = 150Ω
-75
-70
Distortion (dBc)
Distortion (dBc)
-65
-75
-80
-85
RL = 150Ω
-80
-85
-90
-90
RL = 1kΩ
-95
-95
VOUT = 2Vpp
-100
RL = 1kΩ
VOUT = 2Vpp
-100
0
5
10
15
20
0
5
Frequency (MHz)
10
2nd Harmonic Distortion vs. VOUT
20
3rd Harmonic Distortion vs. VOUT
-60
-70
-65
10MHz
-75
10MHz
Distortion (dBc)
-70
Distortion (dBc)
15
Frequency (MHz)
-75
-80
5MHz
-85
-90
1MHz
RL = 150Ω
0.5
0.75
-80
5MHz
-85
-90
1MHz
-95
-95
-100
RL = 150Ω
100Ω
-100
1
1.25
1.5
1.75
2
2.25
2.5
0.5
0.75
1
Output Amplitude (Vpp)
1.25
1.5
1.75
2
2.25
2.5
Output Amplitude (Vpp)
Rev 1E
CMRR vs. Frequency
PSRR vs. Frequency
-25
0
-30
-10
-35
-20
PSRR (dB)
CMRR (dB)
VS = ±5.0V
-40
-45
-50
-30
-40
-50
-55
-60
10k
100k
Comlinear CLC1605, CLC2605, CLC3605 1.5GHz Amplifiers
-55
1M
10M
10K
100M
©2007-2013 Exar Corporation 100K
1M
10M
100M
Frequency (Hz)
Frequency (Hz)
11/21
Rev 1E
Data Sheet
Typical Performance Characteristics - Continued
TA = 25°C, Vs = ±5V, Rf = Rg =330Ω, RL = 150Ω to GND, G = 2; unless otherwise noted.
Small Signal Pulse Response at VS = 5V
0.125
2.625
0.1
2.6
0.075
2.575
2.55
0.025
2.525
Voltage (V)
0.05
0
-0.025
2.5
2.475
-0.05
2.45
-0.075
2.425
-0.1
2.4
-0.125
2.375
0
20
40
60
80
100
120
140
160
180
200
0
20
40
60
80
Time (ns)
100
120
140
160
180
200
Time (ns)
Large Signal Pulse Response
Large Signal Pulse Response at VS = 5V
2.5
4
2
3.5
1.5
3
0.5
Voltage (V)
Voltage (V)
1
0
-0.5
2.5
2
-1
-1.5
1.5
-2
-2.5
1
0
20
40
60
80
100
120
140
160
180
200
0
20
40
60
Time (ns)
100
120
140
160
180
200
Time (ns)
Differential Gain & Phase DC Coupled Output
0.01
0.03
Diff Gain (%) / Diff Phase (°)
0.005
DG
0
-0.005
DP
-0.01
-0.015
RL = 150Ω
AC coupled
-0.02
0.02
DP
DG
0.01
0
-0.01
-0.02
RL = 150Ω
DC coupled
-0.03
-0.7
-0.5
-0.3
-0.1
0.1
0.3
0.5
0.7
-0.7
Input Voltage (V)
©2007-2013 Exar Corporation -0.5
-0.3
-0.1
0.1
0.3
0.5
0.7
Input Voltage (V)
12/21
Rev 1E
Rev 1E
Differential Gain & Phase AC Coupled Output
Diff Gain (%) / Diff Phase (°)
80
Comlinear CLC1605, CLC2605, CLC3605 1.5GHz Amplifiers
Voltage (V)
Small Signal Pulse Response
Data Sheet
Typical Performance Characteristics - Continued
TA = 25°C, Vs = ±5V, Rf = Rg =330Ω, RL = 150Ω to GND, G = 2; unless otherwise noted.
Differential Gain & Phase AC Coupled Output at VS = ±2.5V
Differential Gain & Phase DC Coupled at VS = ±2.5V
0.01
0
Diff Gain (%) / Diff Phase (°)
Diff Gain (%) / Diff Phase (°)
DP
-0.01
-0.02
DG
-0.03
-0.04
RL = 150Ω
AC coupled
-0.01
-0.02
DG
-0.03
-0.04
-0.05
-0.06
RL = 150Ω
DC coupled
-0.07
-0.05
-0.35
DP
0
-0.25
-0.15
-0.05
0.05
0.15
0.25
-0.35
0.35
-0.25
-0.15
0.05
0.15
0.25
0.35
Crosstalk vs. Frequency at VS=5V (CLC3605) -30
-30
-35
-35
-40
-40
-45
-45
-50
-50
Crosstalk (dB)
Crosstalk (dB)
Crosstalk vs. Frequency (CLC3605)
-55
-60
-65
-70
-55
-60
-65
-70
-75
-75
-80
-80
-85
-85
VOUT = 2Vpp
-90
VOUT = 1Vpp
-90
-95
-95
0.1
1
10
100
0.1
1
Frequency (MHz)
10
100
Frequency (MHz)
Off Isolation vs. Frequency at VS=5V
-45
-50
-50
-55
-55
-60
-60
-65
-65
Off Isolation (dB)
-45
-70
-75
-80
-85
-90
-70
-75
-80
-85
-90
-95
-95
-100
-100
VOUT = 2Vpp
-105
Rev 1E
Off Isolation vs. Frequency
Off Isolation (dB)
-0.05
Input Voltage (V)
Input Voltage (V)
VOUT = 1Vpp
-105
-110
-110
0.1
1
10
100
0.1
Frequency (MHz)
©2007-2013 Exar Corporation 1
10
100
Frequency (MHz)
13/21
Comlinear CLC1605, CLC2605, CLC3605 1.5GHz Amplifiers
0.02
0.01
Rev 1E
Data Sheet
General Information - Current Feedback
Technology
Advantages of CFB Technology
Ierr
When designing with CFB amplifiers always abide by these
basic rules:
• Use the recommended feedback resistor value
• Do not use reactive (capacitors, diodes, inductors, etc.)
elements in the direct feedback path
• Avoid stray or parasitic capacitance across feedback
resistors
• Follow general high-speed amplifier layout guidelines
• Ensure proper precautions have been made for driving
capacitive loads
Ierr
x1
Zo*Ierr
VOUT
Rf
RL
Rg
VOUT
VIN
= 1+
Rf
Rg
+
1+
1
Rf
Eq. 1
Zo(jω)
Figure 1. Non-Inverting Gain Configuration with First
Order Transfer Function
©2007-2013 Exar Corporation Rg
VOUT
VIN
VOUT
Rf
= −
Rf
Rg
+
1+
1
Rf
RL
Eq. 2
Zo(jω)
Figure 2. Inverting Gain Configuration with First Order
Transfer Function
CFB Technology - Theory of Operation
Figure 1 shows a simple representation of a current
feedback amplifier that is configured in the traditional
non-inverting gain configuration.
Instead of having two high-impedance inputs similar to a
VFB amplifier, the inputs of a CFB amplifier are connected
across a unity gain buffer. This buffer has a high impedance
input and a low impedance output. It can source or sink
current (Ierr) as needed to force the non-inverting input
to track the value of Vin. The CFB architecture employs
a high gain trans-impedance stage that senses Ierr and
drives the output to a value of (Zo(jω) * Ierr) volts. With
the application of negative feedback, the amplifier will
drive the output to a voltage in a manner which tries to
drive Ierr to zero. In practice, primarily due to limitations
on the value of Zo(jω), Ierr remains a small but finite
value.
A closer look at the closed loop transfer function (Eq.1)
shows the effect of the trans-impedance, Zo(jω) on the
gain of the circuit. At low frequencies where Zo(jω) is very
large with respect to Rf, the second term of the equation
approaches unity, allowing Rf and Rg to set the gain. At
higher frequencies, the value of Zo(jω) will roll off, and
the effect of the secondary term will begin to dominate.
The -3dB small signal parameter specifies the frequency
where the value Zo(jω) equals the value of Rf causing the
gain to drop by 0.707 of the value at DC.
For more information regarding current feedback
amplifiers, visit www.exar.com for detailed application
notes, such as AN-3: The Ins and Outs of Current
Feedback Amplifiers.
14/21
Rev 1E
Rev 1E
VIN
VIN
Zo*Ierr
Comlinear CLC1605, CLC2605, CLC3605 1.5GHz Amplifiers
The CLC1605 Family of amplifiers utilize current feedback
(CFB) technology to achieve superior performance. The
primary advantage of CFB technology is higher slew rate
performance when compared to voltage feedback (VFB)
architecture. High slew rate contributes directly to better
large signal pulse response, full power bandwidth, and
distortion.
CFB also alleviates the traditional trade-off between
closed loop gain and usable bandwidth that is seen with
a VFB amplifier. With CFB, the bandwidth is primarily
determined by the value of the feedback resistor, Rf. By
using optimum feedback resistor values, the bandwidth
of a CFB amplifier remains nearly constant with different
gain configurations.
x1
Data Sheet
Application Information
Basic Operation
+Vs
Input
Feedback Resistor Selection
6.8μF
0.1μF
+
Output
-
RL
0.1μF
Rg
Rf
6.8μF
G = 1 + (Rf/Rg)
-Vs
Figure 3. Typical Non-Inverting Gain Circuit
+Vs
R1
Input
0.1μF
+
Rg
6.8μF
One of the key design considerations when using a CFB
amplifier is the selection of the feedback resistor, Rf. Rf is
used in conjunction with Rg to set the gain in the traditional
non-inverting and inverting circuit configurations. Refer to
figures 3 and 4. As discussed in the Current Feedback
Technology section, the value of the feedback resistor has
a pronounced effect on the frequency response of the
circuit.
Table 1, provides recommended Rf and associated Rg
values for various gain settings. These values produce
the optimum frequency response, maximum bandwidth
with minimum peaking. Adjust these values to optimize
performance for a specific application. The typical
performance characteristics section includes plots that
illustrate how the bandwidth is directly affected by the
value of Rf at various gain settings.
Output
-
RL
0.1μF
Rf
6.8μF
For optimum input offset
voltage set R1 = Rf || Rg
Figure 4. Typical Inverting Gain Circuit
+Vs
Input
6.8μF
0.1μF
+
Output
0.1μF
6.8μF
-Vs
RL
Rf
G=1
Rf is required for CFB amplifiers
Rf (Ω)
Rg (Ω)
±0.1dB BW
(MHz)
-3dB BW
(MHz)
1
499
-
167
1500
2
330
330
120
1200
5
330
82.5
66
385
10
330
33
38
245
Rev 1E
G = - (Rf/Rg)
-Vs
Gain
(V/V
Table 1: Recommended Rf vs. Gain
In general, lowering the value of Rf from the recommended
value will extend the bandwidth at the expense of
additional high frequency gain peaking. This will cause
increased overshoot and ringing in the pulse response
characteristics. Reducing Rf too much will eventually
cause oscillatory behavior.
Increasing the value of Rf will lower the bandwidth.
Lowering the bandwidth creates a flatter frequency
response and improves 0.1dB bandwidth performance.
This is important in applications such as video. Further
increase in Rf will cause premature gain rolloff and
adversely affect gain flatness.
Figure 5. Typical Unity Gain (G=1) Circuit
©2007-2013 Exar Corporation 15/21
Comlinear CLC1605, CLC2605, CLC3605 1.5GHz Amplifiers
Figures 3, 4, and 5 illustrate typical circuit configurations for
non-inverting, inverting, and unity gain topologies for dual
supply applications. They show the recommended bypass
capacitor values and overall closed loop gain equations.
CFB amplifiers can be used in unity gain configurations.
Do not use the traditional voltage follower circuit, where
the output is tied directly to the inverting input. With a CFB
amplifier, a feedback resistor of appropriate value must be
used to prevent unstable behavior. Refer to figure 5 and
Table 1. Although this seems cumbersome, it does allow a
degree of freedom to adjust the passband characteristics.
Rev 1E
Data Sheet
Driving Capacitive Loads
In general, avoid adding any additional parasitic
capacitance at this node. In addition, stray capacitance
across the Rf resistor can induce peaking and high
frequency ringing. Refer to the Layout Considerations
section for additional information regarding high speed
layout techniques.
Overdrive Recovery
+
Rs
-
Output
CL
Rf
RL
Rg
Figure 6. Addition of RS for Driving
Capacitive Loads
Table 2 provides the recommended RS for various
capacitive loads. The recommended RS values result
in <=0.5dB peaking in the frequency response. The
Frequency Response vs. CL plot, on page 5, illustrates the
response of the CLC1605 Family.
RS (Ω)
-3dB BW (MHz)
20
20
350
50
15
235
100
10
170
500
5
75
1000
3.3
52
1.5
6
VIN = 2Vpp
G=5
1
4
Input
0.5
2
Output
0
0
-0.5
-2
-1
-4
-1.5
Output Voltage (V)
CL (pF)
An overdrive condition is defined as the point when either
one of the inputs or the output exceed their specified
voltage range. Overdrive recovery is the time needed for
the amplifier to return to its normal or linear operating
point. The recovery time varies, based on whether the
input or output is overdriven and by how much the range
is exceeded. The CLC1605 Family will typically recover
in less than 10ns from an overdrive condition. Figure 7
shows the CLC1605 in an overdriven condition.
Input Voltage (V)
Input
-6
0
20
40
60
80
100
120
140
160
180
200
Rev 1E
Time (ns)
Table 1: Recommended RS vs. CL
For a given load capacitance, adjust RS to optimize the
tradeoff between settling time and bandwidth. In general,
reducing RS will increase bandwidth at the expense of
additional overshoot and ringing.
Parasitic Capacitance on the Inverting Input
Physical connections between components create
unintentional or parasitic resistive, capacitive, and
inductive elements.
Parasitic capacitance at the inverting input can be
especially troublesome with high frequency amplifiers.
A parasitic capacitance on this node will be in parallel
with the gain setting resistor Rg. At high frequencies, its
impedance can begin to raise the system gain by making
Rg appear smaller.
©2007-2013 Exar Corporation Figure 7. Overdrive Recovery
Power Dissipation
Power dissipation should not be a factor when operating
under the stated 1000 ohm load condition. However,
applications with low impedance, DC coupled loads
should be analyzed to ensure that maximum allowed
junction temperature is not exceeded. Guidelines listed
below can be used to verify that the particular application
will not cause the device to operate beyond it’s intended
operating range.
Maximum power levels are set by the absolute maximum
junction rating of 150°C. To calculate the junction
temperature, the package thermal resistance value
ThetaJA (ӨJA) is used along with the total die power
dissipation.
16/21
Comlinear CLC1605, CLC2605, CLC3605 1.5GHz Amplifiers
Increased phase delay at the output due to capacitive
loading can cause ringing, peaking in the frequency
response, and possible unstable behavior. Use a series
resistance, RS, between the amplifier and the load to
help improve stability and settling performance. Refer to
Figure 6.
Rev 1E
Data Sheet
2.5
TJunction = TAmbient + (ӨJA × PD)
PD = Psupply - Pload
Maximum Power Dissipation (W)
In order to determine PD, the power dissipated in the load
needs to be subtracted from the total power delivered by
the supplies.
1.5
1
0.5
SOT23-5
Supply power is calculated by the standard power equation.
0
-40
-20
Vsupply = VS+ - VS-
The effective load resistor (Rloadeff) will need to include
the effect of the feedback network. For instance,
Rloadeff in figure 3 would be calculated as:
RL || (Rf + Rg)
These measurements are basic and are relatively easy to
perform with standard lab equipment. For design purposes
however, prior knowledge of actual signal levels and load
impedance is needed to determine the dissipated power.
Here, PD can be found from
PD = PQuiescent + PDynamic - PLoad
(VLOAD)RMS = VPEAK / √2
( ILOAD)RMS = ( VLOAD)RMS / Rloadeff
The dynamic power is focused primarily within the output
stage driving the load. This value can be calculated as:
PDYNAMIC = (VS+ - VLOAD)RMS × ( ILOAD)RMS
Assuming the load is referenced in the middle of the power
rails or Vsupply/2.
Figure 8 shows the maximum safe power dissipation in
the package vs. the ambient temperature for the available
packages.
©2007-2013 Exar Corporation 40
60
80
Better thermal ratings can be achieved by maximizing
PC board metallization at the package pins. However, be
careful of stray capacitance on the input pins.
In addition, increased airflow across the package can also
help to reduce the effective ӨJA of the package.
In the event the outputs are momentarily shorted to a low
impedance path, internal circuitry and output metallization
are set to limit and handle up to 65mA of output current.
However, extended duration under these conditions may
not guarantee that the maximum junction temperature
(+150°C) is not exceeded.
Layout Considerations
General layout and supply bypassing play major roles in
high frequency performance. Exar has evaluation boards
to use as a guide for high frequency layout and as aid in
device testing and characterization. Follow the steps below
as a basis for high frequency layout:
▪▪Include 6.8µF and 0.1µF ceramic capacitors for power
supply decoupling
▪▪Place the 6.8µF capacitor within 0.75 inches of the power pin
▪▪Place the 0.1µF capacitor within 0.1 inches of the power pin
▪▪Remove the ground plane under and around the part,
especially near the input and output pins to reduce
parasitic capacitance
▪▪Minimize all trace lengths to reduce series inductances
Refer to the evaluation board layouts below for more
information.
17/21
Rev 1E
Rev 1E
Quiescent power can be derived from the specified IS
values along with known supply voltage, VSupply. Load
power can be calculated as above with the desired signal
amplitudes using:
20
Figure 8. Maximum Power Derating
Power delivered to a purely resistive load is:
Pload = ((VLOAD)RMS2)/Rloadeff
0
Ambient Temperature (°C)
Psupply = Vsupply × IRMS supply
Comlinear CLC1605, CLC2605, CLC3605 1.5GHz Amplifiers
Where TAmbient is the temperature of the working environment.
SOIC-16
SOIC-8
2
Data Sheet
Evaluation Board Information
The following evaluation boards are available to aid in the
testing and layout of these devices:
Products
Comlinear CLC1605, CLC2605, CLC3605 1.5GHz Amplifiers
Evaluation Board #
CEB002
CEB006
CEB013
CLC1605
CLC2605
CLC3605
Evaluation Board Schematics
Evaluation board schematics and layouts are shown in
Figures 9-14. These evaluation boards are built for dualsupply operation. Follow these steps to use the board in a
single-supply application:
Figure 10. CEB002 Top View
1. Short -Vs to ground.
2. Use C3 and C4, if the -VS pin of the amplifier is not
directly connected to the ground plane.
Rev 1E
Figure 11. CEB002 Bottom View
Figure 9. CEB002 Schematic
©2007-2013 Exar Corporation 18/21
Rev 1E
Data Sheet
DIS1
16
2
IN1
1
RIN1
15
RF1
ROUT1
OUT1
Figure 12. CEB006 Schematic
RG1
DIS2
13
5
IN2
4
RIN2
12
RF2
11,14
ROUT2
OUT2
3,6
RG2
DIS3
9
7
IN3
8
RIN3
10
ROUT3
OUT3
RG3
Board Mounting Holes
Figure 13. CEB006 Top View
Figure 15. CEB013 Schematic
©2007-2013 Exar Corporation 19/21
Rev 1E
Rev 1E
RF3
Comlinear CLC1605, CLC2605, CLC3605 1.5GHz Amplifiers
Figure 14. CEB006 Bottom View
Data Sheet
Comlinear CLC1605, CLC2605, CLC3605 1.5GHz Amplifiers
Figure 16. CEB013 Top View
Figure 17. CEB013 Bottom View
Mechanical Dimensions
SOT23-5 Package
Rev 1E
©2007-2013 Exar Corporation 20/21
Rev 1E
Data Sheet
Mechanical Dimensions
SOIC-8 Package
Comlinear CLC1605, CLC2605, CLC3605 1.5GHz Amplifiers
SOIC-16 Package
Rev 1E
For Further Assistance:
Exar Corporation Headquarters and Sales Offices
48720 Kato Road
Tel.: +1 (510) 668-7000
Fremont, CA 94538 - USA
Fax: +1 (510) 668-7001
www.exar.com
NOTICE
EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any
circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained here in are only for illustration
purposes and may vary depending upon a user’s specific application. While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies.
EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or
to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage
has been minimized; (b) the user assumes all such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances.
Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.
©2007-2013 Exar Corporation 21/21
Rev 1E
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