LTC2241-12
12-Bit, 210Msps ADC
U
FEATURES
DESCRIPTIO
The LTC®2241-12 is a 210Msps, sampling 12-bit A/D
converter designed for digitizing high frequency, wide
dynamic range signals. The LTC2241-12 is perfect for
demanding communications applications with AC perfor-
mancethatincludes65.5dBSNRand78dBSFDR.Ultralow
jitter of 95fsRMS allows IF undersampling with excellent
noise performance.
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Sample Rate: 210Msps
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65.5dB SNR
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78dB SFDR
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1.2GHz Full Power Bandwidth S/H
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Single 2.5V Supply
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Low Power Dissipation: 585mW
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LVDS, CMOS, or Demultiplexed CMOS Outputs
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Selectable Input Ranges: ±0.5V or ±1V
DC specs include ±0.7LSB INL (typ), ±0.4LSB DNL (typ)
and no missing codes over temperature.
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No Missing Codes
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Optional Clock Duty Cycle Stabilizer
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The digital outputs can be either differential LVDS, or
single-ended CMOS. There are three format options for
theCMOSoutputs:asinglebusrunningatthefulldatarate
or two demultiplexed buses running at half data rate with
either interleaved or simultaneous update. A separate
output power supply allows the CMOS output swing to
range from 0.5V to 2.625V.
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 over a wide range of clock duty cycles.
Shutdown and Nap Modes
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Data Ready Output Clock
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Pin Compatible Family
250Msps: LTC2242-12 (12-Bit), LTC2242-10 (10-Bit)
210Msps: LTC2241-12 (12-Bit), LTC2241-10 (10-Bit)
170Msps: LTC2240-12 (12-Bit), LTC2240-10 (10-Bit)
185Msps: LTC2220-1 (12-Bit)*
170Msps: LTC2220 (12-Bit), LTC2230 (10-Bit)*
135Msps: LTC2221 (12-Bit), LTC2231 (10-Bit)*
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64-Pin 9mm × 9Umm QFN Package
APPLICATIO S
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
*LTC2220-1, LTC2220, LTC2221, LTC2230, LTC2231 are 3.3V parts.
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Wireless and Wired Broadband Communication
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Cable Head-End Systems
Power Amplifier Linearization
Communications Test Equipment
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TYPICAL APPLICATIO
2.5V
SFDR vs Input Frequency
V
DD
0.5V
TO 2.625V
85
80
REFH
REFL
FLEXIBLE
REFERENCE
OV
DD
75
70
65
60
55
50
45
40
D11
+
12-BIT
PIPELINED
ADC CORE
CMOS
OR
•
•
•
CORRECTION
LOGIC
ANALOG
INPUT
OUTPUT
DRIVERS
INPUT
S/H
LVDS
–
D0
1V RANGE
OGND
2V RANGE
CLOCK/DUTY
CYCLE
CONTROL
0
100 200 300 400 500 600 700 800 9001000
INPUT FREQUENCY (MHz)
224112 G11
224112 TA01
ENCODE
INPUT
224112fa
1