LTC1099 datasheet(1/16 Pages) LINER

No de pièce	LTC1099

Description	High Speed 8-Bit A/D Converter with Built-In Sample-and-Hold

PDF	16 Pages

Scroll/Zoom	100%

Fabricant	LINER [Linear Technology]

Site Internet	http://www.linear.com

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1 / 16 page

LTC1099

1

DESCRIPTIO

FEATURES

The LTC

®1099 is a high speed microprocessor compatible

8-bit analog-to-digital converter (A/D). An internal sample-

and-hold (S/H) allows the A/D to convert inputs up to the

full Nyquist limit. With a conversion rate of 2.5

µs, this

allows 156kHz 5VP-P input signals or slew rates as high as

2.5V/

µs, to be digitized without the need for an external

S/H.

Two modes of operation, Read (RD) mode and Write-Read

(WR-RD) mode, allow easy interface with processors. All

timing is internal and edge sensitive which eliminates the

need for external pulse shaping circuits. The Stand-Alone

(SA) mode is convenient for those applications not involv-

ing a processor.

Data outputs are latched with three-state control to allow

easy interface to a processor data bus or I/O port. An

overflow output (OFL) is provided to allow cascading for

higher resolution.

s

Resolution: 8-Bits

s

Conversion Time: 2.5

µs (RD Mode)

2.5

µs (WR/RD Mode)

s

Slew Rate Limit (Internal S/H): 2.5V/

µs

s

Low Power: 75mW Max

s

Total Unadjusted Error

LTC1099:

±1 LSB

LTC1099A:

±0.75 LSB

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

s

Built-In Sample-and-Hold

s

No Missing Codes

s

No User Trims Required

s

All Timing Inputs Edge Sensitive for Easy Processor

Interface

s

Fast Conversion Time: 2.5

µs

s

Latched Three-State Outputs

s

Single 5V Operation

s

No External Clock

s

Overflow Output Allows Cascading

s

TC Input Allows User Adjustable Conversion Time

s

0.3" Wide 20-Pin PDIP

High Speed 8-Bit A/D

Converter with Built-In

Sample-and-Hold

INPUT FREQUENCY (kHz)

1

–36

–38

–40

–42

–44

–46

–48

–50

–52

10

100

1099 G08

TA = 25°C

TC = 2.5µs

Infinite Hold Time Sample-and-Hold (TACQ = 240ns)

Signal-to-Noise Ratio (SNR) vs Input Frequency

KEY SPECIFICATIO S

TYPICAL APPLICATION

17

16

15

14

5

4

3

2

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

B1

B2

B3

B4

B5

B6

B7

B8

LTC1099

1

2

3

4

5

6

7

8

REF +

REF –

V +

V –

IO

–

+

SAMPLE

HOLD

VIN

MODE

WR/RDY

RD

CS

GND

REF –

VCC

REF+

7

1

6

8

13

10

15

17

14

18

19

3

2

7

6

4

11

12

20

10k

2.5k

15V

–15V

5V

VOUT

LT1022

AM6012

1099 TA01

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