
MAXQ7665A–MAXQ7665D
16-Bit RISC Microcontroller-Based
Smart Data-Acquisition Systems
16
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Pin Description
PIN
NAME
FUNCTION
1
AIN11
Analog Input Channel 11. AIN11 is multiplexed to the PGA as a differential input with AIN10.
2
AIN10
Analog Input Channel 10. AIN10 is multiplexed to the PGA as a differential input with AIN11.
3
AIN9
Analog Input Channel 9. AIN9 is multiplexed to the PGA as a differential input with AIN8.
4
AIN8
Analog Input Channel 8. AIN8 is multiplexed to the PGA as a differential input with AIN9.
5, 8
AGND
Analog Ground
6
REFADC
ADC External Reference Input. Connect an external reference voltage between 1V and AVDD to
REFADC.
7
REFDAC
DAC External Reference Input. Connect an external reference voltage between 0V and AVDD to
REFDAC.
9
AIN7
Analog Input Channel 7. AIN7 is multiplexed to the PGA as a differential input with AIN6.
10
AIN6
Analog Input Channel 6. AIN6 is multiplexed to the PGA as a differential input with AIN7.
11
AIN5
Analog Input Channel 5. AIN5 is multiplexed to the PGA as a differential input with AIN4.
12
AIN4
Analog Input Channel 4. AIN4 is multiplexed to the PGA as a differential input with AIN5.
13
AIN3
Analog Input Channel 3. AIN3 is multiplexed to the PGA as a differential input with AIN2.
AIN3–AIN0 have remote temperature sensor capability.
14
AIN2
Analog Input Channel 2. AIN2 is multiplexed to the PGA as a differential input with AIN3.
AIN3–AIN0 have remote temperature sensor capability.
15
AIN1
Analog Input Channel 1. AIN1 is multiplexed to the PGA as a differential input with AIN0.
AIN3–AIN0 have remote temperature sensor capability.
16
AIN0
Analog Input Channel 0. AIN0 is multiplexed to the PGA as a differential input with AIN1.
AIN3–AIN0 have remote temperature sensor capability.
17
DACOUT
DAC Buffer Output. DACOUT is the DAC voltage buffer output.
18, 19, 31
DGND
Digital Ground for the Digital Core and Flash
20
CANRXD
CAN Bus Receiver Input. Control area network receiver input.
21
CANTXD
CAN Bus Transmitter Output. Control area network transmitter output.
22
UTX
UART Transmitter Output
23
URX
UART Receiver Input
24
P0.6/T0
Port 0 Bit 6/Timer 0. P0.6 is a general-purpose digital I/O with interrupt/wake-up input capability.
T0 is a primary timer/PWM input or output.
25
P0.7/T1
Port 0 Bit 7/Timer 1. P0.7 is a general-purpose digital I/O with interrupt/wake-up input capability.
T1 is a primary timer/PWM input or output.
26, 39
DVDDIO
Digital I/O Supply Voltage. Supplies all digital I/O except for XIN, XOUT, and RESET. Bypass
DVDDIO to GNDIO with a 0.1F capacitor placed as close as possible to the device. DVDDIO is
also connected to the input of the linear regulator.
27
GNDIO
Digital I/O Ground
28, 29
I.C.
Internal Connection. Connect I.C. to GNDIO or DVDDIO.
30
N.C.
No Connection. No internal connection. Leave N.C. unconnected.
32
P0.0/TDO
Port 0 Data 0/JTAG Serial Test Data Output. P0.0 is a general-purpose digital I/O with
interrupt/wake-up capability. TDO is the JTAG serial test, data output.