Pin description – Rainbow Electronics MAX117 User Manual
Page 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).
MODE
5
Analog Input Channel 6
IN6
—
FUNCTION
Three-State Data Outputs
D1, D2, D3
7, 8, 9
Three-State Data Output (LSB)
D0
6
Lower limit of reference span. REF- sets the zero-code voltage. Range is GND
≤
V
REF-
< V
REF+
.
REF-
13
Ground
GND
12
Interrupt Output.
INT goes low to indicate end of conversion (see Digital Interface
section).
INT
11
Read Input.
RD must be low to access data (see Digital Interface section).
RD
10
Write-Control Input/Ready-Status Output (see
Digital Interface section)
WR/RDY
15
Upper limit of reference span. REF+ sets the full-scale input voltage. Range is
V
REF-
< V
REF+
≤
V
DD
. Internally hardwired to IN8 (Table 1).
REF+
14
Multiplexer Channel Address Input (MSB)
A2
—
Three-State Data Output (MSB)
D7
20
Positive Supply, +3.0V to +3.6V
V
DD
24
Power-Down Input.
PWRDN reduces supply current when low.
PWRDN
23
Multiplexer Channel Address Input (LSB)
A0
22
Multiplexer Channel Address Input
A1
21
Analog Input Channel 7
IN7
—
Three-State Data Outputs
D4, D5, D6
17, 18, 19
Chip-Select Input.
CS must be low for the device to recognize WR or RD inputs.
CS
16
9, 10, 11
8
15
14
13
12
17
16
23
22
27
PIN
7
1
26
25
24
28
19, 20, 21
18
MAX113
NAME
MAX117
Analog Input Channel 5
IN5
—
2
Analog Input Channel 1
Analog Input Channel 2
IN2
3
IN1
5
4
6
Analog Input Channel 3
Analog Input Channel 4
IN4
1
IN3
3
2
4