Rainbow Electronics MAX118 - Manual (Page 6)

MAX114/MAX118
+5V, 1Msps, 4 & 8-Channel,
8-Bit ADCs with 1µA Power-Down
6 _______________________________________________________________________________________
______________________________________________________________Pin Description
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
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 hard-wired to IN8 (Table 1).
REF+ 14
Multiplexer Channel Address Input (MSB) A2 —
Three-State Data Output (MSB) D7 20
Positive Supply, +5V V DD 24
PIN
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).
MODE 5
Analog Input Channel 6 IN6 —
FUNCTION NAME
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
14
12
17
16
23
22
27
7
1
26
25
24
28
19, 20, 21
18
MAX114 MAX118
Analog Input Channel 5 IN5 — 2
Analog Input Channel 2 IN2 3
Analog Input Channel 1
5
IN1 4 6
Analog Input Channel 4 IN4 1
Analog Input Channel 3
3
IN3 2 4
15
Interrupt Output. INT goes low to indicate end of conversion (see Digital Interface
section).
11 INT 13