User Manual

Jennic

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Jennic

15 Analogue Peripherals

The JN5139 contains a number of analogue peripherals allowing the direct connection of a wide range of external

sensors, switches and actuators.

ADC

DAC1

DAC2

VREF

Chip

Boundary

Internal Reference

Processor Bus

Supply Voltage

(VDD1)

Vref select

Temp

Sensor

Comparator 2

Comparator 1

COMP2M

COMP1M

COMP1P

COMP2P

DAC1

DAC2

ADC1

ADC2

ADC3

ADC4

Vref

Figure 39: On-chip Analogue Peripherals

In order to provide good isolation from digital noise, the analogue peripherals are powered by a separate regulator,

supplied from the analogue supply VDD1 and referenced to analogue ground VSSA.

The ADC and DAC reference Vref can be selected between an internal bandgap reference or an external voltage

reference supplied to the VREF pin.