MAX11359A_12 Datasheet, PDF (23/67 Pages) Maxim Integrated Products – 16-Bit Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor

MAX11359A
16-Bit Data-Acquisition System with ADC, DAC,
UPIOs, RTC, Voltage Monitors, and Temp Sensor
Pin Description (continued)
PIN
NAME
FUNCTION
25
OUTA DACA Force-Sense Output. Analog input to mux.
26
AGND Analog Ground
27
AVDD ^{Analog Supply Voltage. Also ADC reference voltage during AVDD measurement. Bypass to AGND with}
10µF and 0.1µF capacitors in parallel as close to the pin as possible.
28
IN2+ Amplifier 2 Noninverting Input
29
IN2- Amplifier 2 Inverting Input. Analog input to mux.
30
OUT2 Amplifier 2 Output. Analog input to mux.
31
AIN2
Analog Input 2. Analog input to mux. Inputs have internal programmable current source for external
temperature measurement.
32
AIN1
Analog Input 1. Analog input to mux. Inputs have internal programmable current source for external
temperature measurement.
33
REF
Reference Input/Output. Output of the reference buffer amplifier or external reference input. Disabled at
power-up to allow external reference. Reference voltage for ADC and DAC.
34
REG
Linear Voltage-Regulator Output. Charge-pump-doubler input voltage. Bypass REG with a 10µF capacitor
to DGND for charge-pump regulation.
35
CF-
Charge-Pump Flying Capacitor Terminals. Connect an external 10µF (typ) capacitor between CF+ and CF-.
36
CF+
Charge-Pump Output. Connect an external 10µF (typ) reservoir capacitor between CPOUT and DGND. There is
37
CPOUT a low threshold diode between DVDD and CPOUT. When the charge pump is disabled, CPOUT is pulled up
within 300mV (typ) of DVDD.
38
DVDD ^{Digital Supply Voltage. Bypass to DGND with 10µF and 0.1µF capacitors in parallel as close to the pin as}
possible.
39
DGND Digital Ground. Also ground for cascaded linear voltage regulator and charge-pump doubler.
40
UPIO1 User-Programmable Input/Output 1. See the UPIO1_CTRL Register for functionality.
—
EP Exposed Pad. Leave unconnected or connect to AGND.
Maxim Integrated
23