Rainbow-electronics MAX118 Manual de usuario descargar pdf (Pagina 6)

MAX114/MAX118

+5V, 1Msps, 4 & 8-Channel,

8-Bit ADCs with 1µA Power-Down

6 _______________________________________________________________________________________

______________________________________________________________Pin Description

Three-State Data OutputsD1, D2, D37, 8, 9

Three-State Data Output (LSB)D06

Lower Limit of Reference Span. REF- sets the zero-code voltage. Range is GND ≤

REF-

< V

REF+

REF-13

GroundGND12

Read Input. RD must be low to access data (see

Digital Interface

section).RD

Write-Control Input/Ready-Status Output (see

Digital Interface

section)

WR/RDY

Upper Limit of Reference Span. REF+ sets the full-scale input voltage. Range is V

REF-

< V

REF+

≤ V

. Internally hard-wired to IN8 (Table 1).

REF+14

Multiplexer Channel Address Input (MSB)A2—

Three-State Data Output (MSB)D720

Positive Supply, +5VV

Mode Selection Input. Internally pulled low with a 50µA current source. MODE = 0 acti-

vates read mode; MODE = 1 activates write-read mode (see

Digital Interface

Section).

MODE5

Analog Input Channel 6IN6—

FUNCTIONNAME

Power-Down Input. PWRDN reduces supply current when low.PWRDN

Multiplexer Channel Address Input (LSB)A022

Multiplexer Channel Address Input A121

Analog Input Channel 7IN7—

Three-State Data OutputsD4, D5, D617, 18, 19

Chip-Select Input. CS must be low for the device to recognize WR or RD inputs.CS

9, 10, 11

19, 20, 21

MAX114 MAX118

Analog Input Channel 5IN5— 2

Analog Input Channel 2IN23

Analog Input Channel 1

IN14 6

Analog Input Channel 4IN41

Analog Input Channel 3

IN32 4

Interrupt Output. INT goes low to indicate end of conversion (see

Digital Interface

section).

INT

1 2 3 4 5 6 7 8 9 10 11 12

MAX114/MAX118 1

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Rainbow-electronics MAX118 Manual de usuario Pagina 6

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