Rainbow Electronics MAX1326 - Manual (Page 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)
PIN
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
DD to
select the internal clock. Connect INTCLK/EXTCLK to AGND to use
an external clock connected to CLK.
18 18 18 REF MS
Midscale Reference Bypass or Input. REF MS is the bypass point for
an internally generated reference voltage. For the MAX1316/
MAX1317/MAX1318, connect a 0.1µF capacitor from REF
MS to
AGND. For the MAX1320/MAX1321/MAX1322/MAX1324/
MAX1325/MAX1326, connect REF
MS directly to REF and bypass
with a 0.1µF capacitor from REF MS 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.