AMC7823 Datasheet, PDF (9/48 Pages) Texas Instruments – ANALOG MONITORING AND CONTROL CIRCUIT

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TERMINAL
NO.
NAME
12 CH1
13 CH2
14 CH3
15 AGND
16 AVDD
17 CH4
18 CH5
19 CH6
20 CH7
21 EXT_REF_IN
22 DAC-4_OUT
23 DAC-5_OUT
24 DAC-6_OUT
25 DAC-7_OUT
26 RESET
27 GPIO-0/ALR0
28 GPIO-1/ALR1
29 GPIO-2/ALR2
30 GPIO-3/ALR3
31 CONVERT
32 SCLK
33 MOSI
34 MISO
35 SS
36 BVDD
37 DVDD
38 DGND
39 GPIO4
40 GPIO5
AMC7823
SLAS453A – APRIL 2005 – REVISED OCTOBER 2005
TERMINAL FUNCTIONS (continued)
DESCRIPTION
Analog input channel 1
Analog input channel 2
Analog input channel 3
Analog ground
Analog power supply, +3 V to +5 V. Must be the same value as DVDD.
Analog input channel 4
Analog input channel 5
Analog input channel 6
Analog input channel 7
When external reference connects here, the internal reference is overridden. When internal reference
is selected, this pin works as output of the internal reference (with 10-kΩ output impedance). See
Reference section for details.
Output of DAC-4
Output of DAC-5
Output of DAC-6
Output of DAC-7
Reset input. Logic low on this pin causes the part to perform hardware reset.
Multiple function I/O pin. Works as digital I/O or ALR pin of the first analog input.
Multiple function I/O pin. Works as digital I/O or ALR pin of the second analog input.
Multiple function I/O pin. Works as digital I/O or ALR pin of the third analog input.
Multiple function I/O pin. Works as digital I/O or ALR pin of the fourth analog input.
External conversion trigger. The rising edge starts sampling and conversion of the ADC when
external trigger mode is selected.
Serial clock input
Master out, slave in. Digital data input for the serial interface
Master in, slave out. Digital data output for the serial interface
Slave select input (active low). Data is not clocked into MOSI unless SS is low. When SS is high,
MISO is in high-impedance status.
Interface power supply. Connects to 3 V for 3-V logic; connects to 5 V for 5-V logic.
Digital power supply (+3 V to +5 V). Must be the same value as AVDD.
Digital ground
General-purpose digital I/O pin
General-purpose digital I/O pin
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