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LTC2285
1
2285fb
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Dual 14-Bit, 125Msps
Low Power 3V ADC
The LTC2285 is a 14-bit 125Msps, low power dual 3V
A/D converter designed for digitizing high frequency,
wide dynamic range signals. The LTC2285 is perfect for
demanding imaging and communications applications
with AC performance that includes 72.2dB SNR and 82dB
SFDR for signals at the Nyquist frequency.
Typical DC specs include ±1.5LSB INL, ±0.6LSB DNL. The
transition noise is a low 1.3LSBRMS.
A single 3V supply allows low power operation. A separate
output supply allows the outputs to drive 0.5V to 3.6V
logic.
A single-ended CLK input controls converter operation.
An optional clock duty cycle stabilizer allows high perfor-
mance at full speed for a wide range of clock duty cycles.
A data ready output clock (CLKOUT) can be used to latch
the output data.
SNR vs Input Frequency,
–1dB, 2V Range
n Integrated Dual 14-Bit ADCs
n Sample Rate: 125Msps
n Single 3V Supply (2.85V to 3.4V)
n Low Power: 790mW
n 72.4dB SNR, 88dB SFDR
n 110dB Channel Isolation at 100MHz
n Flexible Input: 1VP-P to 2VP-P Range
n 640MHz Full Power Bandwidth S/H
n Clock Duty Cycle Stabilizer
n Shutdown and Nap Modes
n Data Ready Output Clock
n Pin Compatible Family
125Msps: LTC2283 (12-Bit), LTC2285 (14-Bit)
105Msps: LTC2282 (12-Bit), LTC2284 (14-Bit)
80Msps: LTC2294 (12-Bit), LTC2299 (14-Bit)
65Msps: LTC2293 (12-Bit), LTC2298 (14-Bit)
40Msps: LTC2292 (12-Bit), LTC2297 (14-Bit)
n 64-Pin (9mm × 9mm) QFN Package
n Wireless and Wired Broadband Communication
n Imaging Systems
n Spectral Analysis
n Portable Instrumentation
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
–
+
INPUT
S/H
ANALOG
INPUT A
ANALOG
INPUT B
CLK A
CLK B
14-BIT
PIPELINED
ADC CORE
CLOCK/DUTY CYCLE
CONTROL
OUTPUT
DRIVERS
OVDD
OGND
MUX
CLKOUT
D13A
D0A
OVDD
OGND
2285 TA01
D13B
D0B
–
+
OUTPUT
DRIVERS
INPUT
S/H
14-BIT
PIPELINED
ADC CORE
CLOCK/DUTY CYCLE
CONTROL
OF
INPUT FREQUENCY (MHz)
0
65
SNR
(dBFS)
66
68
69
70
75
72
100
200
250
2285 TA01b
67
73
74
71
50
150
300
350
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