LTC2203/LTC2202
16-Bit, 25Msps/10Msps ADCs
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FEATURES
DESCRIPTIO
The LTC®2203/LTC2202 are 25Msps/10Msps, sampling
16-bitA/Dconvertersdesignedfordigitizinghighfrequen-
cy, wide dynamic range signals with input frequencies up
to 380MHz. The input range of the ADC can be optimized
with the PGA front end.
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Sample Rate: 25Msps/10Msps
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81.6dB SNR and 100dB SFDR (2.5V Range)
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SFDR 90dB at 70MHz (1.667V Input Range)
P-P
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PGA Front End (2.5V or 1.667V Input Range)
P-P
P-P
380MHz Full Power Bandwidth S/H
Optional Internal Dither
Optional Data Output Randomizer
Single 3.3V Supply
The LTC2203/LTC2202 are perfect for demanding ap-
plications, with AC performance that includes 81.6dB
SNR and 100dB spurious free dynamic range (SFDR).
Maximum DC specs include ±±LSB ꢀNL, ±1LSB DNL (no
missing codes).
Power Dissipation: 220mW/1±0mW
Clock Duty Cycle Stabilizer
Out-of-Range ꢀndicator
A separate output power supply allows the CMOS output
swing to range from 0.5V to 3.6V.
Pin Compatible Family
25Msps: LTC2203 (16-Bit)
10Msps: LTC2202 (16-Bit)
±8-Pin (7mm × 7mm) QFN Package
Asingle-endedCLKinputcontrolsconverteroperation.An
optionalclockdutycyclestabilizerallowshighperformance
at full speed with a wide range of clock duty cycles.
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APPLICATIO S
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All
other trademarks are the property of their respective owners. Protected by U.S. Patents
including ±8±3302 and 69±9965B1
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Telecommunications
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Receivers
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Cellular Base Stations
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Spectrum Analysis
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ꢀmaging Systems
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ATE
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TYPICAL APPLICATIO
LTC2203: 128K Point FFT,
fIN = 5.1MHz, –1dBFS, PGA = 0
3.3V
0
–10
–20
–30
–±0
SENSE
OV
DD
1.25V
COMMON MODE
BꢀAS VOLTAGE
ꢀNTERNAL ADC
REFERENCE
GENERATOR
V
0.5V TO 3.6V
CM
1μF
2.2μF
–50
–60
–70
–80
–90
–100
–110
–120
–130
–1±0
OF
CLKOUT+
CLKOUT–
+
A
ꢀN
+
16-BꢀT
PꢀPELꢀNED
ADC CORE
OUTPUT
DRꢀVERS
CORRECTꢀON
LOGꢀC AND
SHꢀFT REGꢀSTER
ANALOG
ꢀNPUT
S/H
AMP
CMOS
OUTPUTS
D15
•
•
–
–
A
ꢀN
•
D0
OGND
CLOCK/DUTY
CYCLE
CONTROL
3.3V
1μF
V
DD
1μF
1μF
GND
0
2
±
6
8
10
12
FREQUENCY(MHz)
22032 GO7
CLK
PGA SHDN DꢀTH MODE
ADC CONTROL ꢀNPUTS
RAND
OE
22032 TA01
22032fb
1