LTC2232/LTC2233
10-Bit,105Msps/
80Msps ADCs
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FEATURES
DESCRIPTIO
The LTC®2232 and LTC2233 are 105Msps/80Msps, sam-
pling 10-bit A/D converters designed for digitizing high
frequency, wide dynamic range signals. The LTC2232/
LTC2233 are perfect for demanding communications
applicationswithACperformancethatincludes61dBSNR
and 75dB spurious free dynamic range for signals
up to 200MHz. Ultralow jitter of 0.15psRMS allows
undersampling of IF frequencies with excellent noise
performance.
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Sample Rate: 105Msps/80Msps
■
61dB SNR up to 140MHz Input
■
75dB SFDR up to 200MHz Input
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775MHz Full Power Bandwidth S/H
■
Single 3.3V Supply
■
Low Power Dissipation: 475mW/366mW
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Selectable Input Ranges: ±0.5V or ±1V
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No Missing Codes
■
Optional Clock Duty Cycle Stabilizer
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Shutdown and Nap Modes
DC specs include ±0.15LSB INL (typ), ±0.1LSB DNL (typ)
and ±0.8LSB INL, ±0.6LSB DNL over temperature. The
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Data Ready Output Clock
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Pin Compatible Family
transition noise is a low 0.12LSBRMS
.
135Msps: LTC2224 (12-Bit), LTC2234 (10-Bit)
105Msps: LTC2222 (12-Bit), LTC2232 (10-Bit)
80Msps: LTC2223 (12-Bit), LTC2233 (10-Bit)
Aseparateoutputpowersupplyallowstheoutputstodrive
0.5V to 3.6V logic.
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The ENC+ and ENC– inputs may be driven differentially or
singleendedwithasinewave, PECL, LVDS, TTL, orCMOS
inputs. An optional clock duty cycle stabilizer allows high
performance at full speed for a wide range of clock duty
cycles.
48-Pin 7mm x 7mm QFN Package
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APPLICATIO S
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Wireless and Wired Broadband Communication
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Cable Head-End Systems
■
Power Amplifier Linearization
Communications Test Equipment
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
■
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TYPICAL APPLICATIO
3.3V
V
SFDR vs Input Frequency
DD
0.5V
90
TO 3.6V
REFH
FLEXIBLE
REFERENCE
85
REFL
4th OR HIGHER
OV
DD
80
75
70
65
60
55
50
D9
+
10-BIT
PIPELINED
ADC CORE
•
•
•
CORRECTION
LOGIC
ANALOG
INPUT
OUTPUT
DRIVERS
INPUT
S/H
2nd OR 3rd
–
D0
OGND
CLOCK/DUTY
CYCLE
CONTROL
0
200
300
400
500
600
100
22323 TA01b
INPUT FREQUENCY (MHz)
22323 TA01
ENCODE INPUT
22323fa
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