LTC1414 Linear Technology, LTC1414 Datasheet

LTC1414

Manufacturer Part Number

LTC1414

Description

14-Bit/ 2.2Msps/ Sampling A/D Converter

Manufacturer

Linear Technology

Datasheet

1.LTC1414.pdf (20 pages)

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APPLICATIO S

FEATURES

TYPICAL APPLICATIO

COMP

10 F

1 F

REF

Sample Rate: 2.2Msps

Outstanding Spectral Purity:

80dB S/(N + D) and 95dB SFDR at 100kHz

78dB S/(N + D) and 84dB SFDR at Nyquist

Ultralow Distortion with Single-Ended or

Differential Inputs

and Rail-to-Rail Op Amp Requirements

Easy Hookup for External or Internal Reference

No Pipeline Delay

Power Dissipation: 175mW on 5V Supplies

28-Pin Narrow SSOP Package

Telecommunications

Digital Signal Processing

Multiplexed Data Acquisition Systems

High Speed Data Acquisition

Spectrum Analysis

Imaging Systems

–

2.5V Bipolar Input Range Eliminates Level Shifting

10 F

LTC1414

BUFFER

S/H

– 5V

4.0625V

REFERENCE

2.5V

AGND

14-BIT ADC

10 F

TIMING AND

LOGIC

DGND

BUFFERS

OUTPUT

OGND

LOGIC SUPPLY

OPTIONAL 3V

•

DESCRIPTIO

The LTC

verter which draws only 175mW from 5V supplies. This

high performance ADC includes a high dynamic range

sample-and-hold, a precision reference and requires no

external components.

The LTC1414’s high performance sample-and-hold has a

full-scale input range of 2.5V. Outstanding AC perfor-

mance includes 80dB S/(N + D) and 95dB SFDR with a

100kHz input. The performance remains high at the Nyquist

input frequency of 1.1MHz with 78dB S/(N + D) and 84dB

SFDR.

The unique differential input sample-and-hold can acquire

single-ended or differential input signals up to its 40MHz

bandwidth. The 70dB common mode rejection can elimi-

nate ground loops and common mode noise by measuring

signal differentially from the source

The ADC has a microprocessor compatible, 14-bit parallel

output port. There is no pipline delay in the conversion

results.

D13 (MSB)

D0 (LSB)

BUSY

CONVST

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

1414 TA01

Sampling A/D Converter

1414 is a 14-bit, 2.2Msps, sampling A/D con-

Effective Bits and Signal-to-Noise + Distortion

SAMPLE

= 2.2MHz

10k

vs Input Frequency

INPUT FREQUENCY (Hz)

14-Bit, 2.2Msps,

100k

LTC1414

1414 TA02

10M

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