SP1674BB 데이터 시트보기 (PDF) - Signal Processing Technologies

부품명

상세내역

제조사

SP1674BB

12–Bit Sampling A/D Converters

Signal Processing Technologies 

A0 may be toggled without damage to the con-

verter at any time. Break–before–make action is

guaranteed between the two data bytes. This as-

sures that the outputs which are strapped together

in Figure 5 will never be enabled at the same time.

In Figure 7, it can be seen that a read operation

usually begins after the conversion is complete and

STS is low. If earlier access is needed, the read can

begin no later than the addition of times t and t

DD

HS

before STS goes low.

"NYQUIST" SAMPLING

Each of the SPx74B analog-to-digital convert-

ers has been designed to provide Nyquist sam-

pling (highest input frequency is 1/2 of the

sampling rate) data conversion with no degra-

dation in DC performance. This is shown in

Figure 10. Note that the Differential Linearity

and Integral Linearity min/max values are well

within the ± 1/2 LSB limits of a K-version

Converter. Also, the Typical FFT at Nyquist

rates shown on Figure 10 reflect the values

listed in the Typical AC Dynamics table.

INPUT BUFFERS

12/8

CS

READ CONTROL

A0

R/C

CE

EOC8

CK

Q

D

Q

A0 LATCH

EOC12

H DQ

CK

R

Figure 4. SPx74B Control Logic

DELAY

NIBBLE B ZERO

OVERRIDE

NIBBLE A, B

NIBBLE C

STS

A0

ADDRESS BUS

2 12/8

4

A0

28

STS

27

DB11 (MSB)

26

25

24

23

SPx74B

22

21

20

19

18

17

16

DB0 (LSB)

DIG 15

COM

Figure 5. Interfacing SPx74B to 8–Bit Interface Bus

SP574B/674B/1674B/774B

12–Bit Sampling A/D Converters

10

DATA

BUS

© Copyright 2000 Sipex Corporation

Share Link: