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LTC2234
1
2234fa
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
■ Sample Rate: 135Msps
■
61dB SNR up to 200MHz Input
■ 75dB SFDR up to 400MHz Input
■ 775MHz Full Power Bandwidth S/H
■
Single 3.3V Supply
■ Low Power Dissipation: 630mW
■ CMOS Outputs
■
Selectable Input Ranges:
±0.5V or ±1V
■ No Missing Codes
■ Optional Clock Duty Cycle Stabilizer
■
Shutdown and Nap Modes
■ Data Ready Output Clock
■ 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
■ Wireless and Wired Broadband Communication
■ Cable Head-End Systems
■
Power Amplifier Linearization
■ Communications Test Equipment
10-Bit, 135Msps ADC
The LTC
2234 is a 135Msps, sampling 10-bit A/D con-
verter designed for digitizing high frequency, wide dy-
namic range signals. The LTC2234 is perfect for demand-
ing communications applications with AC performance
that includes 60.5dB SNR and 75dB spurious free dy-
namic range for signals up to 400MHz. Ultralow jitter of
0.15psRMS allows undersampling of IF frequencies with
excellent noise performance.
DC specs include
±0.2LSB INL (typ), ±0.1LSB DNL (typ)
and
±0.8LSB INL, ±0.6LSB DNL over temperature. The
transition noise is a low 0.12LSBRMS.
A separate output power supply allows the CMOS output
swing to range from 0.5V to 3.6V.
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 allows high
performance at full speed for a wide range of clock duty
cycles.
–
+
INPUT
S/H
CORRECTION
LOGIC
OUTPUT
DRIVERS
10-BIT
PIPELINED
ADC CORE
CLOCK/DUTY
CYCLE
CONTROL
FLEXIBLE
REFERENCE
D9
D0
0.5V TO 3.6V
OVDD
OGND
ENCODE
INPUT
REFH
REFL
ANALOG
INPUT
2234 TA01
3.3V
VDD
APPLICATIO S
U
SFDR vs Input Frequency
SFDR
(dBFS)
INPUT FREQUENCY (MHz)
0600
500
400
2234 TA01b
100
200
300
4th OR HIGHER
2nd OR 3rd
90
85
80
75
70
65
60
55
50
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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