Datasheet

MAX11359A

16-Bit Data-Acquisition System with ADC, DAC,

UPIOs, RTC, Voltage Monitors, and Temp Sensor

Maxim Integrated

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-

36 CF+

C har g e- P um p Fl yi ng C ap aci tor Ter m i nal s. C onnect an exter nal 10µF ( typ ) cap aci tor b etw een C F+ and C F- .

37 CPOUT

C har g e- P um p Outp ut. C onnect an exter nal 10µF ( typ ) r eser voi r cap aci tor b etw een C P O U T and D GN D . Ther e i s

a l ow thr eshol d d i od e b etw een DVDD and C P OU T. When the char g e p um p i s d i sab l ed , C P OU T i s p ul l ed up

w i thi n 300m V ( 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 U ser - P r og r am m ab l e Inp ut/O utp ut 1. S ee the U P IO1_C TRL Reg i ster for functionality.

—EPE xp osed P ad . Leave unconnected or connect to AGN D .

Pin Description (continued)