LTC2245 データシートの表示（PDF） - Linear Technology

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LTC2245

Dual 14-Bit, 80Msps Low Power 3V ADC

Linear Technology 

FEATURES

■ Integrated Dual 14-Bit ADCs

■ Sample Rate: 80Msps

■ Single 3V Supply (2.7V to 3.4V)

■ Low Power: 444mW

■ 73dB 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)

■ 64-Pin (9mm × 9mm) QFN Package

U

APPLICATIO S

■ Wireless and Wired Broadband Communication

■ Imaging Systems

■ Spectral Analysis

■ Portable Instrumentation

TYPICAL APPLICATIO

ANALOG

INPUT A

+

INPUT

S/H

–

14-BIT

PIPELINED

ADC CORE

CLK A

CLK B

CLOCK/DUTY CYCLE

CONTROL

CLOCK/DUTY CYCLE

CONTROL

ANALOG

INPUT B

+

INPUT

S/H

–

14-BIT

PIPELINED

ADC CORE

LTC2299

Dual 14-Bit, 80Msps

Low Power 3V ADC

DESCRIPTIO

The LTC®2299 is a 14-bit 80Msps, low power dual 3V

A/D converter designed for digitizing high frequency, wide

dynamic range signals. The LTC2299 is perfect for

demanding imaging and communications applications

with AC performance that includes 73dB SNR and 90dB

SFDR for signals well beyond the Nyquist frequency.

DC specs include ±1.2LSB INL (typ), ±0.5LSB DNL (typ)

and ±5LSB INL, ±1LSB DNL over temperature. The transi-

tion noise is a low 1.2LSBRMS.

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.

OUTPUT

DRIVERS

OVDD

D13A

•••

D0A

OGND

MUX

OUTPUT

DRIVERS

OVDD

D13B

•••

D0B

OGND

2299 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

2299 TA02

2299fa

1

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