1

LTC1414

14-Bit, 2.2Msps,

Sampling A/D Converter

Effective Bits and Signal-to-Noise + Distortion

vs Input Frequency

14-BIT ADC

14

5V

OPTIONAL 3V

LOGIC SUPPLY

10

µF

OGND

1414 TA01

DGND

D13 (MSB)

D0 (LSB)

BUSY

S/H

BUFFER

LTC1414

4.0625V

2k

–5V

2.5V

REFERENCE

TIMING AND

LOGIC

OUTPUT

BUFFERS

•

•

•

CONVST

AGND

10

µF

10

µF

COMP

–

+

1

µF

INPUT FREQUENCY (Hz)

10k

100k

1M

10M

1414 TA02

1k

14

13

12

11

10

9

8

7

6

5

4

3

2

86

80

74

68

TYPICAL APPLICATIO

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.

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Sample Rate: 2.2Msps

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Outstanding Spectral Purity:

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

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

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Ultralow Distortion with Single-Ended or

Differential Inputs

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±2.5V Bipolar Input Range Eliminates Level Shifting

and Rail-to-Rail Op Amp Requirements

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Easy Hookup for External or Internal Reference

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No Pipeline Delay

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Power Dissipation: 175mW on

±5V Supplies

s

28-Pin Narrow SSOP Package

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

FEATURES

DESCRIPTIO

s

Telecommunications

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Digital Signal Processing

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Multiplexed Data Acquisition Systems

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High Speed Data Acquisition

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Spectrum Analysis

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Imaging Systems

APPLICATIO S