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LTC6401IUD-20#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
LTC6401-20
1
640120f
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
1.3GHz Low Noise, Low
Distortion Differential ADC
Driver for 140MHz IF
The LTC
®
6401-20 is a high-speed differential amplifi er
targeted at processing signals from DC to 140MHz. The
part has been specifi cally designed to drive 12-, 14- and
16-bit ADCs with low noise and low distortion, but can also
be used as a general-purpose broadband gain block.
The LTC6401-20 is easy to use, with minimal support
circuitry required. The output common mode voltage is
set using an external pin, independent of the inputs, which
eliminates the need for transformers or AC-coupling ca-
pacitors in many applications. The gain is internally fi xed
at 20dB (10V/V).
The LTC6401-20 saves space and power compared to
alternative solutions using IF gain blocks and transform-
ers. The LTC6401-20 is packaged in a compact 16-lead
3mm × 3mm QFN package and operates over the –40°C
to 85°C temperature range.
■
1.3GHz –3dB Bandwidth
■
Fixed Gain of 10V/V (20dB)
■
–93dBc IMD
3
at 70MHz (Equivalent OIP
3
= 50.5dBm)
■
–74dBc IMD
3
at 140MHz (Equivalent OIP
3
= 41dBm)
■
1nV/√
⎯
H
⎯
z Internal Op Amp Noise
■
2.1nV/√
⎯
H
⎯
z Total Input Noise
■
6.2dB Noise Figure
■
Differential Inputs and Outputs
■
200Ω Input Impedance
■
2.85V to 3.5V Supply Voltage
■
50mA Supply Current (150mW)
■
1V to 1.6V Output Common Mode Voltage,
Adjustable
■
DC- or AC-Coupled Operation
■
Max Differential Output Swing 4.4V
P-P
■
Small 16-Lead 3mm × 3mm × 0.75mm QFN Package
■
Differential ADC Driver
■
Differential Driver/Receiver
■
Single Ended to Differential Conversion
■
IF Sampling Receivers
■
SAW Filter Interfacing
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
29Ω
66.5Ω
0.1μF
0.1μF
640120 TA01a
LTC6401-20
V
OCM
ENABLE
LTC2208
10Ω
0.1μF + 1000pF
INPUT
0.1μF
LTC2208 130Msps
16-Bit ADC
1.25V
3.3V
10Ω
AIN
+
AIN
–
V
CM
V
DD
20dB GAIN
V
+
–IN
+IN
3.3V
+OUT
+OUTF
–OUTF
–OUT
V
–
Single-Ended to Differential ADC Driver Equivalent Output IP3 vs Frequency
FREQUENCY (MHz)
0
OUTPUT IP3 (dBm)
70
(NOTE 7)
60
50
40
30
20
10
0
10050 150
640120 TA01b
200
LTC6401-20
2
640120f
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
+
– V
–
) ..........................................3.6V
Input Current (Note 2) ..........................................±10mA
Operating Temperature Range
(Note 3) ............................................... –40°C to 85°C
Specifi ed Temperature Range
(Note 4) ............................................... –40°C to 85°C
Storage Temperature Range ................... –65°C to 150°C
Maximum Junction Temperature........................... 150°C
(Note 1)
16 15 14 13
5 6 7 8
TOP VIEW
UD PACKAGE
16-LEAD (3mm × 3mm) PLASTIC QFN
9
10
11
17
12
4
3
2
1
V
+
V
OCM
V
+
V
–
V
–
ENABLE
V
+
V
–
–IN
–IN
+IN
+IN
–OUT
–OUTF
+OUTF
+OUT
T
JMAX
= 150°C, θ
JA
= 68°C/W, θ
JC
= 4.2°C/W
EXPOSED PAD (PIN 17) IS V
–
, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LTC6400 AND LTC6401 SELECTOR GUIDE
PART NUMBER GAIN
(dB)
GAIN
(V/V)
Z
IN
(DIFFERENTIAL)
(Ω)
I
CC
(mA)
LTC6400-20 20 10 200 90
LTC6401-20 20 10 200 50
In addition to the LTC6401 family of amplifi ers, a lower distortion LTC6400 family is available. The LTC6400 is pin compatible to the LTC6401, and has the
same low noise performance. The low distortion of the LTC6400 comes at the expense of higher power consumption. Please refer to the separate LTC6400
data sheets for complete details. Other gain versions from 8dB to 26dB will follow.
Please check each datasheet for complete details.
PIN CONFIGURATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC6401CUD-20#PBF LTC6401CUD-20#TRPBF LCDB 16-Lead (3mm × 3mm) Plastic QFN 0°C to 70°C
LTC6401IUD-20#PBF LTC6401IUD-20#TRPBF LCDB 16-Lead (3mm × 3mm) Plastic QFN –40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/
LTC6401-20
3
640120f
DC ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Input/Output Characteristic
G
DIFF
Gain V
IN
= ±100mV Differential
●
19.4 20 20.6 dB
G
TEMP
Gain Temperature Drift V
IN
= ±100mV Differential
●
1 mdB/°C
V
SWINGMIN
Output Swing Low Each Output, V
IN
= ±400mV Differential
●
90 170 mV
V
SWINGMAX
Output Swing High Each Output, V
IN
= ±400mV Differential
●
2.3 2.44 V
V
OUTDIFFMAX
Maximum Differential Output Swing 1dB Compressed 4.4 V
P-P
I
OUT
Output Current Drive Single-Ended
●
10 mA
V
OS
Input Offset Voltage Differential
●
–2 2 mV
TCV
OS
Input Offset Voltage Drift Differential
●
1.4 μV/°C
I
VRMIN
Input Common Mode Voltage Range, MIN 1 V
I
VRMAX
Input Common Mode Voltage Range, MAX 1.6 V
R
INDIFF
Input Resistance Differential
●
170 200 230
Ω
C
INDIFF
Input Capacitance Differential, Includes Parasitic 1 pF
R
OUTDIFF
Output Resistance Differential
●
18 25 32
Ω
R
OUTFDIFF
Filtered Output Resistance Differential
●
85 100 115
Ω
C
OUTFDIFF
Filtered Output Capacitance Differential, Includes Parasitic 2.7 pF
CMRR Common Mode Rejection Ratio Input Common Mode Voltage 1.1V to 1.4V
●
45 66 dB
Output Common Mode Voltage Control
G
CM
Common Mode Gain V
OCM
= 1V to 1.6V 1 V/V
V
OCMMIN
Output Common Mode Range, MIN
●
1
1.1
V
V
V
OCMMAX
Output Common Mode Range, MAX
●
1.6
1.5
V
V
V
OSCM
Common Mode Offset Voltage V
OCM
= 1.1V to 1.5V
●
–15 15 mV
TCV
OSCM
Common Mode Offset Voltage Drift
●
6 μV/°C
IV
OCM
V
OCM
Input Current
●
515 μA
⎯
E
⎯
N
⎯
A
⎯
B
⎯
L
⎯
E Pin
V
IL
⎯
E
⎯
N
⎯
A
⎯
B
⎯
L
⎯
E Input Low Voltage
●
0.8 V
V
IH
⎯
E
⎯
N
⎯
A
⎯
B
⎯
L
⎯
E Input High Voltage
●
2.4 V
I
IL
⎯
E
⎯
N
⎯
A
⎯
B
⎯
L
⎯
E Input Low Current
⎯
E
⎯
N
⎯
A
⎯
B
⎯
L
⎯
E = 0.8V
●
±0.5 μA
I
IH
⎯
E
⎯
N
⎯
A
⎯
B
⎯
L
⎯
E Input High Current
⎯
E
⎯
N
⎯
A
⎯
B
⎯
L
⎯
E = 2.4V
●
1.2 3 μA
Power Supply
V
S
Operating Supply Range
●
2.85 3 3.5 V
I
S
Supply Current
⎯
E
⎯
N
⎯
A
⎯
B
⎯
L
⎯
E = 0.8V
●
38 50 62 mA
I
SHDN
Shutdown Supply Current
⎯
E
⎯
N
⎯
A
⎯
B
⎯
L
⎯
E = 2.4V
●
13 mA
PSRR Power Supply Rejection Ratio
(Differential Outputs)
2.85V to 3.5V
●
55 84 dB
The ● denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
+
= 3V, V
–
= 0V, +IN = –IN = V
OCM
= 1.25V,
⎯
E
⎯
N
⎯
A
⎯
B
⎯
L
⎯
E = 0V, No R
L
unless
otherwise noted.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC6401IUD-20#TRPBF

Mfr. #:
Buy LTC6401IUD-20#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
High Speed Operational Amplifiers 3GHz Low Noise/Low Distortion Differential Amp
Lifecycle:
New from this manufacturer.
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