LTC2220IUP-1#TRPBF【PDF 1/28 页】IC ADC 12BIT 185MSPS 64-QFN

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LTC2220-1

2220_1fa

–

INPUT

S/H

CORRECTION

LOGIC

OUTPUT

DRIVERS

12-BIT

PIPELINED

ADC CORE

CLOCK/DUTY

CYCLE

CONTROL

FLEXIBLE

REFERENCE

D11

ENCODE

INPUT

REFH

REFL

ANALOG

INPUT

22201 TA01

CMOS

LVDS

0.5V

TO 3.6V

3.3V

VDD

OVDD

OGND

, LTC and LT are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

FEATURES

DESCRIPTIO

TYPICAL APPLICATIO

The LTC

2220-1 is a 185Msps, sampling 12-bit A/D

converter designed for digitizing high frequency, wide

dynamic range signals. The LTC2220-1 is perfect for

demanding communications applications with AC perfor-

mance that includes 67.5dB SNR and 80dB spurious free

dynamic range for signals up to 170MHz. Ultralow jitter of

0.15psRMS allows undersampling of IF frequencies with

excellent noise performance.

DC specs include

±0.7LSB INL (typ), ±0.5LSB DNL (typ)

and no missing codes over temperature. The transition

noise is a low 0.5LSBRMS.

The digital outputs can be either differential LVDS, or

single-ended CMOS. There are three format options for

the CMOS outputs: a single bus running at the full data rate

or two demultiplexed buses running at half data rate with

either interleaved or simultaneous update. 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.

APPLICATIO S

SFDR vs Input Frequency

600

500

400

100

200

300

INPUT FREQUENCY (MHz)

SFDR

(dBFS)

100

22201 TA01b

4th OR HIGHER

2nd OR 3rd

12-Bit,185Msps ADC

■

Sample Rate: 185Msps

■ 67.5dB SNR up to 140MHz Input

■ 80dB SFDR up to 170MHz Input

■

775MHz Full Power Bandwidth S/H

■ Single 3.3V Supply

■ Low Power Dissipation: 910mW

■

LVDS, CMOS, or Demultiplexed 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

185Msps: LTC2220-1 (12-Bit)

170Msps: LTC2220 (12-Bit), LTC2230 (10-Bit)

135Msps: LTC2221 (12-Bit), LTC2231 (10-Bit)

■ 64-Pin 9mm

× 9mm QFN Package

■ Wireless and Wired Broadband Communication

■

Cable Head-End Systems

■ Power Amplifier Linearization

■ Communications Test Equipment

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