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LTC6400CUD-26#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
LTC6400-26
1
640026fa
FREQUENCY (MHz)
0
0
OUTPUT IP3 (dBm)
10
20
30
40
60
50
100 150 200
640026 TA01b
250 300
50
NO R
L
R
L
= 200Ω
DIFFERENTIAL INPUT
(NOTE 7)
FEATURES
APPLICATIONS
DESCRIPTION
1.9GHz Low Noise,
Low Distortion Differential
ADC Driver for DC-300MHz
The LTC
®
6400-26 is a high-speed differential amplifi er
targeted at processing signals from DC to 300MHz. 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 LTC6400-26 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 of transformers or AC-coupling ca-
pacitors in many applications. The gain is internally fi xed
at 26dB (20V/V).
The LTC6400-26 saves space and power compared to
alternative solutions using IF gain blocks and transform-
ers. The LTC6400-26 is packaged in a compact 16-lead
3mm × 3mm QFN package and operates over the –40°C
to 85°C temperature range.
Equivalent OIP3 vs Frequency
■
1.9GHz –3dB Bandwidth
■
Fixed Gain of 20V/V (26dB)
■
–94dBc IMD3 at 70MHz (Equivalent OIP3 = 51dBm)
■
–71dBc IMD3 at 300MHz (Equivalent OIP3 = 39.5dBm)
■
1nV/√Hz Internal Op Amp Noise
■
1.5nV/√Hz Total Input Referred Noise
■
6.8dB Noise Figure
■
Differential Inputs and Outputs
■
50Ω Input Impedance
■
2.85V to 3.5V Supply Voltage
■
85mA Supply Current (255mW)
■
1V to 1.6V Output Common Mode, Adjustable
■
DC- or AC-Coupled Operation
■
Max Differential Output Swing 4.7V
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
37.4Ω
150W
0.1μF
0.1μF
640026 TA01a
LTC6400-26
LTC2208
15Ω
0.1μF
V
IN
1000pF
3.3V3.3V
15Ω
10Ω
10Ω
100Ω
V
OCM
0.1μF
33pF
COILCRAFT
0603CS
1.25V
33pF24nH
33pF
V
+
–IN
+IN
+OUT
–OUT
V
–
AIN
+
AIN
–
V
CM
V
DD
LTC2208
130Msps
16-BIT ADC
Single-Ended to Differential ADC Driver at 140MHz IF
TYPICAL APPLICATION
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
LTC6400-26
2
640026fa
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 s 3mm) PLASTIC QFN
9
10
11
17
12
4
3
2
1V
+
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
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE
LTC6400CUD-26#PBF LTC6400CUD-26#TRPBF LCCX 16-Lead (3mm × 3mm) Plastic QFN 0°C to 70°C
LTC6400IUD-26#PBF LTC6400IUD-26#TRPBF LCCX 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/
LTC6400 AND LTC6401 SELECTOR GUIDE
PART NUMBER GAIN
(dB)
GAIN
(V/V)
Z
IN
(DIFFERENTIAL)
(Ω)
I
S
(mA)
LTC6400-20 20 10 200 90
LTC6400-26 26 20 50 85
LTC6401-8 8 2.5 400 45
LTC6401-20 20 10 200 50
LTC6401-26 26 20 50 45
In addition to the LTC6400 family of amplifi ers, a lower power LTC6401 family is available. The LTC6401 is pin compatible to the LTC6400, and has the
same low noise performance. The lower power consumption of the LTC6401 comes at the expense of slightly higher non-linearity, especially at input
frequencies above 140MHz. Please refer to the separate LTC6401 data sheets for complete details. Other gain versions from 8dB to 14dB will follow.
Please check each datasheet for complete details.
PIN CONFIGURATION
LTC6400-26
3
640026fa
DC ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Input/Output Characteristic (+IN, –IN, +OUT, –OUT, +OUTF, –OUTF)
G
DIFF
Gain V
IN
= ±50mV Differential
●
25 26 27 dB
TC
GAIN
Gain Temperature Drift V
IN
= ±50mV Differential
●
0.0038 dB/°C
V
SWINGMIN
Output Swing Low Each Output, V
IN
= ±200mV Differential
●
90 160 mV
V
SWINGMAX
Output Swing High Each Output, V
IN
= ±200mV Differential
●
2.35 2.48 V
V
OUTDIFFMAX
Maximum Differential Output Swing 1dB Compressed
●
4.38 4.7 V
P-P
I
OUT
Output Current Drive Each Output, V
IN
= ±200mV,
V
OUT
> 2V
P-P
●
20 mA
V
OS
Input Offset Voltage Differential
●
–2 2 mV
TCV
OS
Input Offset Voltage Drift Differential
●
1 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 (+IN, –IN) Differential
●
42.5 50 57.5
Ω
C
INDIFF
Input Capacitance Differential, Includes Parasitics 1 pF
R
OUTDIFF
Output Resistance (+OUT, –OUT) Differential
●
18 25 32
Ω
R
OUTFDIFF
Filtered Output Resistance (+OUTF, –OUTF) Differential
●
85 100 115
Ω
C
OUTFDIFF
Filtered Output Capacitance (+OUTF, –OUTF) Differential, Includes Parasitics 2.7 pF
CMRR Common Mode Rejection Ratio Input Common Mode Voltage
1.1V to 1.4V
●
50 75 dB
Output Common Mode 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
●
3 μV/°C
IV
OCM
V
OCM
Input Current
●
515 μA
ENABLE Pin
V
IL
ENABLE Input Low Voltage
●
0.8 V
V
IH
ENABLE Input High Voltage
●
2.4 V
I
IL
ENABLE Input Low Current ENABLE = 0.8V
●
0.5 μA
I
IH
ENABLE Input High Current ENABLE = 2.4V
●
1.4 3 μA
Power Supply
V
S
Operating Supply Range
●
2.85 3 3.5 V
I
S
Supply Current ENABLE = 0.8V
●
70 85 102 mA
I
SHDN
Shutdown Supply Current ENABLE = 2.4V
Both Inputs and Outputs Floating
●
0.8 3 mA
PSRR Power Supply Rejection Ratio
(Differential Outputs)
2.85V to 3.5V
●
65 96 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, ENABLE= 0V, No R
L
unless
otherwise noted.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC6400CUD-26#TRPBF

Mfr. #:
Buy LTC6400CUD-26#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
High Speed Operational Amplifiers 3GHz Low Noise/Low Distortion Differential Amp
Lifecycle:
New from this manufacturer.
Delivery:
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