LTC2222/LTC2223
12-Bit,105Msps/
80Msps ADCs
FEATURES
DESCRIPTION
The LTC®2222 and LTC2223 are 105Msps/80Msps, sam-
pling 12-bit A/D converters designed for digitizing high
frequency, wide dynamic range signals. The LTC2222/
LTC2223 are perfect for demanding communications
applications with AC performance that includes 68dB
SNR and 80dB spurious free dynamic range for signals
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Sample Rate: 105Msps/80Msps
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68dB SNR up to 140MHz Input
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80dB SFDR up to 170MHz Input
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775MHz Full Power Bandwidth S/H
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Single 3.3V Supply
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Low Power Dissipation: 475mW/366mW
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Selectable Input Ranges: 0.5V or 1V
up to 170MHz. Ultralow jitter of 0.15ps
undersampling of IF frequencies with excellent noise
performance.
allows
RMS
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No Missing Codes
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Optional Clock Duty Cycle Stabilizer
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Shutdown and Nap Modes
DC specs include 0.3LSB INL (typ), 0.2LSB DNL (typ)
and no missing codes over temperature. The transition
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Data Ready Output Clock
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Pin Compatible Family
noise is a low 0.5LSB
.
RMS
135Msps: LTC2224 (12-Bit), LTC2234 (10-Bit)
105Msps: LTC2222 (12-Bit), LTC2232 (10-Bit)
80Msps: LTC2223 (12-Bit), LTC2233 (10-Bit)
A separate output power supply allows the outputs to
drive 0.5V to 3.6V logic.
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48-Pin QFN Package
+
–
The ENC and ENC inputs may be driven differentially
or single ended with a sine wave, PECL, LVDS, TTL, or
CMOS inputs. An optional clock duty cycle stabilizer al-
lows high performance at full speed for a wide range of
clock duty cycles.
APPLICATIONS
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Wireless and Wired Broadband Communication
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Cable Head-End Systems
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
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Power Amplifier Linearization
Communications Test Equipment
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TYPICAL APPLICATION
V
DD
3.3V
SFDR vs Input Frequency
100
REFH
REFL
FLEXIBLE
95
REFERENCE
4th OR HIGHER
0V
DD
90
85
80
75
70
65
60
0.5V TO 3.6V
D11
+
12-BIT
PIPELINED
ADC CORE
•
•
•
CORRECTION
LOGIC
ANALOG
INPUT
OUTPUT
DRIVERS
INPUT
S/H
2nd or 3rd
–
D0
0GND
CLOCK/DUTY
CYCLE
CONTROL
0
100
200
300
400
500
600
INPUT FREQUENCY (MHz)
22223 TA01b
22223 TA01
ENCODE
INPUT
22223fb
1