LTC6416
2 GHz Low Noise Differential
16-Bit ADC Buffer
FEATURES DESCRIPTION
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2GHz 3dB Small Signal Bandwidth
The LTC 6416 is a differential unity gain buffer designed
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300MHz 0.1dB Bandwidth
to drive 16-bit ADCs with extremely low output noise
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1.8nV/Hz Output Noise
and excellent linearity beyond 300MHz. Differential input
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46.25dBm Equivalent OIP3 at 140MHz
impedance is 12k, allowing 1:4 and 1:8 transformers to
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40.25dBm Equivalent OIP3 Up to 300MHz
be used at the input to achieve additional system gain.
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81dBc/72dBc HD2/HD3 at 140MHz, 2V Out
P-P
With no external biasing or gain setting components and
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84.5dBc IM3 at 140MHz, 2V Out Composite
P-P
a ow-through pinout, the LTC6416 is very easy to use.
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74dBc/67.5dBc HD2/HD3 at 300MHz, 2V Out
P-P
It can be DC-coupled and has a common mode output
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72.5dBc IM3 at 300MHz, 2V Out Composite
P-P
offset of 40mV. If the input signals are AC-coupled, the
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Programmable High Speed, Fast Recovery
LTC6416 input pins are internally biased to provide an
Output Clamping
output common mode voltage that is set by the voltage
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DC-Coupled Signal Path
on the V pin.
CM
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Operates on Single 2.7V to 3.9V Supply
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In addition the LTC6416 has high speed, fast recovery
Low Power: 150mW on 3.6V
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clamping circuitry to limit output signal swing. Both the
2mm 3mm 10-Pin DFN Package
high and low clamp voltages are internally biased to allow
maximum output swing but are also user programmable
APPLICATIONS
via the CLLO and CLHI pins.
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Differential ADC Driver
Supply current is nominally 42mA and the LTC6416 oper-
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IF Sampling Receivers
ates on supply voltages ranging from 2.7V to 3.9V.
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Impedance Transformer
The LTC6416 is packaged in a 10-lead 3mm 2mm DFN
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SAW Filter Interface
package. Pinout is optimized for placement directly adjacent
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CCD Buffer
to Linears high speed 12-, 14- and 16-bit ADCs.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
LTC6416 Driving LTC2208 ADC
TYPICAL APPLICATION
with 1:8 Transformer f =140MHz,
IN
f = 130MHz, 1dBFS, PGA = 1
S
0
+
V = 3.6V
10
HD2 = 94dBc
LTC6416 Driving LTC2208 ADC 140MHz IF
20 HD3 = 89.1dBc
SFDR = 89.1dB
30
3.6V
SNR = 70.7dB
40
MEASURED USING DC1257B
WITH MINI-CIRCUIT TCM8-1+
50
680pF 0.1F
2.2F 3.3V
1:8 TRANSFORMER
60
CLHI
+
70
V
1.5pF
1:8 V 25
+ CM
+ 80
200 IN
AIN
+
50
OUT
16
90
LTC6416 1pF LTC2208
OUT 100
+
AIN
200 IN
GND
25
110
PGA = 1
GND
1.5pF
120
CLLO 6416 TA01a
0.1F
MINI-CIRCUITS
0 20 30 40 50 60
10
TCM8-1+
FREQUENCY (MHz)
CLOCK
(130MHz)
6416 TA01b
6416f
1
AMPLITUDE (dBFS)LTC6416
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION
(Note 1)
TOP VIEW
+
Total Supply Voltage (V to GND)................................4V
+
+
V 1 10 V
CM
Input Current (CLLO, CLHI, V , IN , IN ) ........... 10mA
CM
+ CLHI 2 9 GND
Output Current (OUT , OUT ) ...........................22.5mA
+ +
11
IN 3 8 OUT
Operating Temperature Range (Note 2)....40C to 85C
IN 4 7 OUT
Speci ed Temperature Range (Note 3) ....40C to 85C
CLLO 5 6 GND
Storage Temperature Range ...................65C to 150C
DDB PACKAGE
Junction Temperature ........................................... 150C
10-LEAD (3mm 2mm) PLASTIC DFNs
T = 150C, = 76C/W, = 13.5C/W
JMAX JA JC
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
Lead Free Finish
TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC6416CDDB#TRMPBF LTC6416CDDB#TRPBF LDDY 0C to 70C
10-Lead (3mm 2mm) Plastic DFN
LTC6416IDDB#TRMPBF LTC6416IDDB#TRPBF LDDY 40C to 85C
10-Lead (3mm 2mm) Plastic DFN
TRM = 500 pieces. *Temperature grades are identi ed by a label on the shipping container.
Consult LTC Marketing for parts speci ed with wider operating temperature ranges.
Consult LTC Marketing for information on lead based nish parts.
For more information on lead free part marking, go to: