Linear Technology DC919A-I - LTC2205-14 | CMOS OUT, DC INPUT, 65Msps 14-Bit ADC (req. DC718) DC919A-I DC919A-I Ficha De Dados

LTC2205-14

1

220514fb

14-Bit, 65Msps ADC 

The LTC

®

2205-14 is a sampling 14-bit A/D converter 

designed for digitizing high frequency, wide dynamic range 
signals up to input frequencies of 700MHz. The input range 
of the ADC can be optimized with the PGA front end.

The LTC2205-14 is perfect for demanding communications 
applications, with AC performance that includes 78.3dB 
SNR and 98dB spurious free dynamic range (SFDR). 
Ultralow jitter of 90fs

RMS

 allows undersampling of high 

input frequencies with excellent noise performance. 
Maximum DC specs include ±1.5LSB INL, ±1LSB DNL 
(no missing codes). 

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 with a wide range 
of clock duty cycles.

n

 Telecommunications

n

 Receivers

n

  Cellular Base Stations

n

 Spectrum Analysis

n

 Imaging Systems

n

 ATE

n

  Sample Rate: 65Msps

n

  78.3dB SNR and 98dB SFDR (2.25V

n

  SFDR >90dB at 140MHz (1.5V

n

  PGA Front End (2.25V

n

  700MHz Full Power Bandwidth S/H

n

  Optional Internal Dither

n

  Optional Data Output Randomizer

n

  Single 3.3V Supply

n

  Power Dissipation: 600mW

n

  Optional Clock Duty Cycle Stabilizer

n

 Out-of-Range Indicator

n

  Pin Compatible Family

  105Msps: LTC2207 (16-Bit), LTC2207-14 (14-Bit)
  80Msps: LTC2206 (16-Bit), LTC2206-14 (14-Bit)
  65Msps: LTC2205 (16-Bit) 

  40Msps: 

LTC2204 

(16-Bit)

n

 48-Pin (7mm × 7mm) QFN Package

–

+

S/H

AMP

CORRECTION

LOGIC AND

SHIFT REGISTER

OUTPUT

DRIVERS

14-BIT

PIPELINED

ADC CORE

INTERNAL ADC

REFERENCE

GENERATOR

1.25V

COMMON MODE

BIAS VOLTAGE

CLOCK/DUTY

CYCLE

CONTROL

D13

•
•
•

D0

ENC

PGA

SHDN

DITH

MODE

OE

RAND

ENC

V

CM

ANALOG

INPUT

220514 TA01 

0.5V TO 3.6V

3.3V

3.3V

SENSE

OGND

OV

DD

2.2μF

0.1μF

V

DD

GND

ADC CONTROL INPUTS

AIN

+

AIN

–

OF
CLKOUT

0.1μF

0.1μF

0.1μF

      , LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.

FREQUENCY (MHz)

0

AMPLITUDE (dBFS)

–80

–20

–10

0

10

20

25

220514 G04

–100

–110

–120

–40

–60

–90

–30

–130

–50

–70

5

15

30