MAX155AEPI(2012) 데이터 시트보기 (PDF) - Maxim Integrated

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MAX155AEPI
(Rev.:2012)

8-/4-Channel ADCs with Simultaneous T/Hs and Reference

Maxim Integrated 

MAX155/MAX156

8-/4-Channel ADCs with Simultaneous

T/Hs and Reference

For this example, 6 write operations (with each

address and data setting in Table 5 above) load the

mux after power-up.

2) Sample all selected channels with a WR pulse (and

INH = 0), and update or rewrite any one location of

the configuration register.

This write operation may be skipped by loading INH with a

0 on the last WR of the above step. The conversion then

starts on the 6th WR. DIFF and SIP cannot be changed

on the 6th WR in the conversion is started at that time.

When the conversion starts, BUSY goes low while all

selected channels are sequentially converted. Conversion

results are stored in RAM and are ready to read when

BUSY returns high.

3) Data is read from RAM with INH = L and consecutive

RD strobes. Note that in the 6 channel configurations

described in this example (Figure 10), 6 RD pulses

access all available data, start with the differential

channel (1, 0). Additional RD pulses loop around,

accessing the lowest chan­nel data again.

4) To start a new conversion cycle with the same mux

configuration, repeat steps 2 and 3.

SENSOR

2.5V

-1.75V

+5V

(-) 3 AIN

(1)

(+) 4

(0)

DIFFERENTIAL

BIPOLAR

2 (2) BIPOLAR

+24

VDD

0.1µF

21

REFOUT

22

REFIN

0.1µF

47µF

47µF

1 (3) BIPOLAR

MAX155

28 (4) BIPOLAR

27 (5) BIPOLAR

(+) 26 (6)

(-) 25 (7)

DIFFERENTIAL

UNIPOLAR

AGND DGND

23

14

0.1µF

11

CLK

CLOCK

5

MODE

7

CS

8

RD

9

WR

10

BUSY

20...15, 13, 12

8

D0–D7

DATA I/0 LINES

VSS

6

-5V

47µF

Figure 10. MAX155/MAX156 Typical Operating Circuit

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