Rainbow-electronics MAX1326 Manual de usuario descargar pdf (Pagina 10)

MAX1316–MAX1318/MAX1320–MAX1322/MAX1324–MAX1326

8-/4-/2-Channel, 14-Bit, Simultaneous-Sampling ADCs

with ±10V, ±5V, and 0 to +5V Analog Input Ranges

10 ______________________________________________________________________________________

Pin Description (continued)

MAX1316

MAX1320

MAX1324

MAX1317

MAX1321

MAX1325

MAX1318

MAX1322

MAX1326

NAME FUNCTION

10 — — CH5 Channel 5 Analog Input

11 — — CH6 Channel 6 Analog Input

12 — — CH7 Channel 7 Analog Input

13 13 13

INTCLK/

EXTCLK

Clock-Mode Select Input. Use INTCLK/EXTCLK to select the internal

or external conversion clock. Connect INTCLK/EXTCLK to AV

select the internal clock. Connect INTCLK/EXTCLK to AGND to use

an external clock connected to CLK.

18 18 18 REF

Midscale Reference Bypass or Input. REF

is the bypass point for

an internally generated reference voltage. For the MAX1316/

MAX1317/MAX1318, connect a 0.1µF capacitor from REF

AGND. For the MAX1320/MAX1321/MAX1322/MAX1324/

MAX1325/MAX1326, connect REF

directly to REF and bypass

with a 0.1µF capacitor from REF

to AGND.

19 19 19 REF

ADC Reference Bypass or Input. REF is the bypass point for an

internally generated reference voltage. Bypass REF with a 0.01µF

capacitor to AGND. REF can be driven externally by a precision

external voltage reference.

20 20 20 REF+

Positive Reference Bypass. REF+ is the bypass point for an

internally generated reference voltage. Bypass REF+ with a 0.1µF

capacitor to AGND. Also bypass REF+ to REF- with a 2.2µF and a

0.1µF capacitor.

21 21 21 COM

Reference Common Bypass. COM is the bypass point for an

internally generated reference voltage. Bypass COM to AGND with

a 2.2µF and a 0.1µF capacitor.

22 22 22 REF-

Negative Reference Bypass. REF- is the bypass point for an

internally generated reference voltage. Bypass REF- with a 0.1µF

capacitor to AGND. Also bypass REF- to REF+ with a 2.2µF and a

0.1µF capacitor.

24 24 24 D0

Digital I/O Bit 0 of 14-Bit Parallel Data Bus. High impedance when

RD = 1 or CS = 1.

25 25 25 D1

Digital I/O Bit 1 of 14-Bit Parallel Data Bus. High impedance when

RD = 1 or CS = 1.

26 26 26 D2

Digital I/O Bit 2 of 14-Bit Parallel Data Bus. High impedance when

RD = 1 or CS = 1.

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 26 27

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Rainbow-electronics MAX1326 Manual de usuario Pagina 10

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