LTC2294 Datasheet, PDF (1/24 Pages) Linear Technology – Dual 12-Bit, 80Msps Low Power 3V ADC

FEATURES
■ _{Integrated Dual 12-Bit ADCs}
■ _{Sample Rate: 80Msps}
■ _{Single 3V Supply (2.7V to 3.4V)}
■ _{Low Power: 422mW}
■ _{70.6dB SNR at 70MHz Input}
■ _{90dB SFDR at 70MHz Input}
■ _{110dB Channel Isolation at 100MHz}
■ _{Multiplexed or Separate Data Bus}
■ _{Flexible Input: 1VP-P to 2VP-P Range}
■ _{575MHz Full Power Bandwidth S/H}
■ _{Clock Duty Cycle Stabilizer}
■ _{Shutdown and Nap Modes}
■ _{Pin Compatible Family}
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)
25Msps: LTC2291 (12-Bit), LTC2296 (14-Bit)
10Msps: LTC2290 (12-Bit), LTC2295 (14-Bit)
■ _{64-Pin (9mm × 9Umm) QFN Package}
APPLICATIO S
■ _{Wireless and Wired Broadband Communication}
■ _{Imaging Systems}
■ _{Spectral Analysis}
■ _{Portable Instrumentation}
LTC2294
Dual 12-Bit, 80Msps
Low Power 3V ADC
DESCRIPTIO
The LTC^®2294 is a 12-bit 80Msps, low power dual 3V
A/D converter designed for digitizing high frequency, wide
dynamic range signals. The LTC2294 is perfect for
demanding imaging and communications applications
with AC performance that includes 70.6dB SNR and 90dB
SFDR for signals well beyond the Nyquist frequency.
DC specs include ±0.4LSB INL (typ), ±0.2LSB DNL (typ)
and no missing codes over temperature. The transition
noise is a low 0.3LSB_RMS.
A single 3V supply allows low power operation. A separate
output supply allows the outputs to drive 0.5V to 3.6V
logic. An optional multiplexer allows both channels to
share a digital output bus.
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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
ANALOG
INPUT A
+
INPUT
S/H
–
12-BIT
PIPELINED
ADC CORE
CLK A
CLK B
CLOCK/DUTY CYCLE
CONTROL
CLOCK/DUTY CYCLE
CONTROL
ANALOG
INPUT B
+
INPUT
S/H
–
12-BIT
PIPELINED
ADC CORE
OUTPUT
DRIVERS
OV_DD
D11A
•••
D0A
OGND
MUX
OUTPUT
DRIVERS
OV_DD
D11B
•••
D0B
OGND
2294 TA01
SNR vs Input Frequency,
–1dB, 2V Range
75
74
73
72
71
70
69
68
67
66
65
0
50
100
150
INPUT FREQUENCY (MHz)
200
2294 TA02
2294fa
1