MAX1358B Datasheet, PDF (25/71 Pages) Maxim Integrated Products – 16-Bit, Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor

16-Bit, Data-Acquisition System with ADC, DACs,
UPIOs, RTC, Voltage Monitors, and Temp Sensor
Pin Description (continued)
PIN
NAME
FUNCTION
23
SWA DACA SPST Shunt Switch Input. Connects to OUTA through an SPST switch.
24
FBA DACA Force-Sense Feedback Input. Analog input to mux.
25
OUTA DACA Force-Sense Output. Analog input to mux.
26
AGND Analog Ground
27
AV_DD
Analog Supply Voltage. Also ADC reference voltage during AV_DD measurement. Bypass to AGND with
10µF and 0.1µF capacitors in parallel as close to the pin as possible.
28
SWB DACB SPST Shunt Switch Input. Connects to OUTB through an SPST switch.
29
FBB DACB Force-Sense Feedback Input. Analog input to mux.
30
OUTB Force-Sense DACB Ouput. 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 DACs.
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 DV_DD.
38
DV_DD
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.
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