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Linear Technology Electronic Components Datasheet

LT6402-12 Datasheet

Low Noise Differential Amplifier / ADC Driver

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FEATURES
n 300 MHz –3dB Bandwidth
n Fixed Gain of 12dB
n Low Distortion:
43dBm OIP3, –82dBc HD3 (20MHz, 2VP-P)
n Low Noise:
15dB NF, en = 2.6nV/√Hz (20MHz)
n Differential Inputs and Outputs
n Additional Filtered Outputs
n Adjustable Output Common Mode Voltage
n DC- or AC-Coupled Operation
n Minimal Support Circuitry Required
n Small 0.75mm Profile 16-Lead 3mm × 3mm QFN
Package
APPLICATIONS
n Differential ADC Driver for:
Imaging
Communications
n Differential Driver/Receiver
n Single Ended to Differential Conversion
n Differential to Single Ended Conversion
n Level Shifting
n IF Sampling Receivers
n SAW Filter Interfacing/Buffering
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
0.1μF
0.1μF
0.1μF
IF IN
5V
–INB
VCC
–INA
VOCM
+OUT
LT6402-12
+INB
+INA VEE
–OUT
0.1μF
10Ω
10Ω
VCM
AIN+
LTC®2249
AIN
64026 TA01a
LT6402-12
300MHz Low Distortion, Low
Noise Differential Amplifier/
ADC Driver (AV = 12dB)
DESCRIPTION
The LT®6402-12 is a low distortion, low noise differential
amplifier/ADC driver for use in applications from DC to
300MHz. The LT6402-12 has been designed for ease of
use, with minimal support circuitry required. Exceptionally
low input-referred noise and low distortion (with either
single-ended or differential inputs) make the LT6402-12
an excellent solution for driving high speed 12-bit and
14-bit ADCs. In addition to the normal unfiltered outputs
(+OUT and –OUT), the LT6402-12 has a built-in 75MHz
differential low pass filter and an additional pair of filtered
outputs (+OUTFILTERED, –OUTFILTERED) to reduce
external filtering components when driving high speed
ADCs. The output common mode voltage is easily set via
the VOCM pin, eliminating an output transformer or AC-
coupling capacitors in many applications.
The LT6402-12 is designed to meet the demanding require-
ments of communications transceiver applications. It can
be used as a differential ADC driver, a general-purpose
differential gain block, or in other applications requiring
differential drive. The LT6402-12 can be used in data
acquisition systems required to function at frequencies
down to DC.
The LT6402-12 operates on a 5V supply and consumes 30mA.
It comes in a compact 16-lead 3mm × 3mm QFN package
and operates over a –40°C to 85°C temperature range.
Distortion vs Frequency, Differential Input, No RLOAD
–40
FILTERED OUTPUTS
VOUT = 2VP-P
–50
–60
–70
–80
–90
–100
1
HD3
HD2
10
FREQUENCY (MHz)
100
640212 TA01b
640212fa
1


Linear Technology Electronic Components Datasheet

LT6402-12 Datasheet

Low Noise Differential Amplifier / ADC Driver

No Preview Available !

LT6402-12
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Total Supply Voltage (VCCA/VCCB/VCCC to
VEEA/VEEB/VEEC) ...................................................5.5V
Input Current (+INA, –INA, +INB, –INB,
VOCM, ENABLE)................................................±10mA
Output Current (Continuous)
+OUT, –OUT ...................................................±100mA
+OUTFILTERED, –OUTFILTERED ......................±30mA
Output Short-Circuit Duration (Note 2) ............ Indefinite
Operating Temperature Range (Note 3).... –40°C to 85°C
Specified Temperature Range (Note 4) .... –40°C to 85°C
Storage Temperature Range................... –65°C to 125°C
Junction Temperature ........................................... 125°C
PIN CONFIGURATION
TOP VIEW
16 15 14 13
VCCC 1
VOCM 2
VCCA 3
VEEA 4
12 VEEC
11 ENABLE
17
10 VCCB
9 VEEB
5678
UD PACKAGE
16-LEAD (3mm × 3mm) PLASTIC QFN
TJMAX = 125°C, θJA = 68°C/W, θJC = 4.2°C/W
EXPOSED PAD IS VEE (PIN 17)
MUST BE SOLDERED TO THE PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT6402CUD-12#PBF
LT6402CUD-12#TRPBF LCBB
16-Lead (3mm × 3mm) Plastic QFN
–40°C to 85°C
LT6402IUD-12#PBF
LT6402IUD-12#TRPBF LCBB
16-Lead (3mm × 3mm) Plastic QFN
–40°C to 85°C
LEAD BASED FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT6402CUD-12
LT6402CUD-12#TR
LCBB
16-Lead (3mm × 3mm) Plastic QFN
–40°C to 85°C
LT6402IUD-12
LT6402IUD-12#TR
LCBB
16-Lead (3mm × 3mm) Plastic QFN
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
DC ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCCA = VCCB = VCCC = 5V, VEEA = VEEB = VEEC = 0V, ENABLE = 0.8V, +INA
shorted to +INB (+IN), –INA shorted to –INB (–IN), VOCM = 2.2V, Input common mode voltage = 2.2V, no RLOAD unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Input/Output Characteristics (+INA, +INB, –INA, –INB, +OUT, –OUT, +OUTFILTERED, –OUTFILTERED)
GDIFF
VSWINGMIN
VSWINGMAX
VSWINGDIFF
IOUT
VOS
Gain
Output Voltage Swing
Output Current Drive
Input Offset Voltage
Differential (+OUT, –OUT), VIN = ±400mV Differential l 11.6 12 12.4
Single-Ended +OUT, –OUT, +OUTFILTERED,
0.25 0.35
–OUTFILTERED, VIN = ±1.2V Differential
l
0.5
Single-Ended +OUT, –OUT, +OUTFILTERED,
–OUTFILTERED, VIN = ±1.2V Differential
3.4
l 3.3
3.6
Differential (+OUT, –OUT), VIN = ±1.2V Differential
6.1
l 5.6
7
l ±30
±35
–6.5
l –10
1
6.5
10
dB
V
V
V
V
VP-P
VP-P
mA
mV
mV
TCVOS
Input Offset Voltage Drift
TMIN to TMAX
l 2.5
μV/°C
640212fa
2


Part Number LT6402-12
Description Low Noise Differential Amplifier / ADC Driver
Maker Linear Technology
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