LTC2222-11
11-Bit, 105Msps ADC
U
FEATURES
DESCRIPTIO
The LTC®2222-11 is a 105Msps, sampling 11-bit A/D
converter designed for digitizing high frequency, wide
dynamic range signals. The LTC2222-11 is perfect for
demanding communications applications with AC perfor-
mance that includes 65.4dB SNR and 80dB spurious free
dynamic range for signals up to 150MHz. Ultralow jitter of
0.15psRMS allows undersampling of IF frequencies with
excellent noise performance.
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Sample Rate: 105Msps
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65.4dB SNR up to 140MHz Input
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80dB SFDR up to 150MHz 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
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CMOS Outputs
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Selectable Input Ranges: ±0.5V or ±1V
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No Missing Codes
DC specs include ±0.15LSB INL (typ), ±0.1LSB DNL (typ)
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Optional Clock Duty Cycle Stabilizer
and no missing codes over temperature. The transition
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Shutdown and Nap Modes
noise is a low 0.25LSBRMS
.
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Data Ready Output Clock
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A separate output power supply allows the CMOS output
swing to range from 0.5V to 3.3V.
Pin Compatible Family
135Msps: LTC2224 (12-Bit), LTC2234 (10-Bit)
105Msps: LTC2222 (12-Bit), LTC2232 (10-Bit)
80Msps: LTC2223 (12-Bit), LTC2233 (10-Bit)
48-Pin 7mm × 7mm QFN Package
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.
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APPLICATIO S
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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Wireless and Wired Broadband Communication
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Cable Head-End Systems
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Power Amplifier Linearization
Communications Test Equipment
■
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TYPICAL APPLICATIO
3.3V
SFDR vs Input Frequency
V
DD
95
REFH
REFL
FLEXIBLE
90
85
80
75
70
65
60
55
50
0.5V TO 3.3V
OV
REFERENCE
4th OR HIGHER
DD
D10
+
11-BIT
PIPELINED
ADC CORE
•
•
•
CORRECTION
LOGIC
ANALOG
INPUT
OUTPUT
DRIVERS
INPUT
S/H
2nd OR 3rd
–
D0
OGND
CLOCK/DUTY
CYCLE
CONTROL
200
300
0
100
400
500
600
222211 TA01
INPUT FREQUENCY (MHz)
ENCODE
INPUT
222211 TA01b
222211f
1