LTC2289 Datasheet, PDF (1/24 Pages) Linear Technology – Dual 10-Bit, 80Msps Low Noise 3V ADC

FEATURES
■ _{Integrated Dual 10-Bit ADCs}
■ _{Sample Rate: 80Msps}
■ _{Single 3V Supply (2.7V to 3.4V)}
■ _{Low Power: 422mW}
■ _{61.6dB SNR at 70MHz Input}
■ _{85dB 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), LTC2280 (10-Bit)
80Msps: LTC2294 (12-Bit), LTC2289 (10-Bit)
65Msps: LTC2293 (12-Bit), LTC2288 (10-Bit)
40Msps: LTC2292 (12-Bit), LTC2287 (10-Bit)
25Msps: LTC2291 (12-Bit), LTC2286 (10-Bit)
■ _{64-Pin (9mm × 9mm) QFN Package}
U
APPLICATIO S
■ _{Wireless and Wired Broadband Communication}
■ _{Imaging Systems}
■ _{Spectral Analysis}
■ _{Portable Instrumentation}
LTC2289
Dual 10-Bit, 80Msps
Low Noise 3V ADC
DESCRIPTIO
The LTC^®2289 is a 10-bit 80Msps, low noise 3V dual A/D
converter designed for digitizing high frequency, wide
dynamic range signals. The LTC2289 is perfect for
demanding imaging and communications applications
with AC performance that includes 61.6dB SNR and 85dB
SFDR for signals well beyond the Nyquist frequency.
DC specs include ±0.1LSB INL (typ), ±0.1LSB DNL (typ)
and ±0.6LSB INL, ±0.5LSB DNL over temperature. The
transition noise is a low 0.08LSB_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
–
CLK A
CLK B
CLOCK/DUTY CYCLE
CONTROL
CLOCK/DUTY CYCLE
CONTROL
ANALOG
INPUT B
+
INPUT
S/H
–
10-BIT
PIPELINED
ADC CORE
10-BIT
PIPELINED
ADC CORE
OUTPUT
DRIVERS
OV_DD
D9A
•••
D0A
OGND
MUX
OUTPUT
DRIVERS
OV_DD
D9B
•••
D0B
OGND
2289 TA01
SNR vs Input Frequency,
–1dB, 2V Range, 80Msps
65
64
63
62
61
60
59
58
57
56
55
0
50
100
150
200
INPUT FREQUENCY (MHz)
2289 TA02
2289fa
1