Rainbow-electronics MAX117 Manual do Utilizador descarregar pdf (Página 6)

MAX113/MAX117

+3V, 400ksps, 4/8-Channel,

8-Bit ADCs with 1µA Power-Down

6 _______________________________________________________________________________________

______________________________________________________________Pin Description

Mode Selection Input. Internally pulled low with a 15µA current source. MODE = 0

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

Digital Interface

section).

MODE5

Analog Input Channel 6IN6—

FUNCTION

Three-State Data Outputs D1, 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

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

Digital Interface

section).

INT

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

REF-

< V

REF+

≤ V

. Internally hardwired to IN8 (Table 1).

REF+14

Multiplexer Channel Address Input (MSB)A2—

Three-State Data Output (MSB)D720

Positive Supply, +3.0V to +3.6VV

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 Outputs D4, 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

MAX113

NAME

MAX117

Analog Input Channel 5IN5— 2

Analog Input Channel 1

Analog Input Channel 2IN23

IN1

4 6

Analog Input Channel 3

Analog Input Channel 4IN41

IN3

2 4

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

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