JN5148 NXP Semiconductors, JN5148 Datasheet - Page 58

• Manufacturer Part Number: JN5148
• Description: The JN5148 is an ultra low power, high performance MCU combined with an IEEE802
• Manufacturer: NXP Semiconductors

20 Analogue Peripherals
The JN5148 contains a number of analogue peripherals allowing the direct connection of a wide range of external
sensors, switches and actuators.
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.
A common reference Vref for the ADC and DAC can be selected between an internal bandgap reference or an
external voltage reference supplied to the VREF pin. Gain settings for the ADC and DAC are independent of each
other.
The ADC and DAC are clocked from a common clock source derived from the 16MHz clock
58
COMP1M
COMP2M
COMP1P
COMP2P
ADC1
ADC2
ADC3
ADC4
DAC1
DAC2
VREF
Boundary
Chip
Sensor
Temp
Figure 43: Analogue Peripherals
JN-DS-JN5148-001 1v7
ADC
Comparator 1
Comparator 2
DAC1
DAC2
Vref
Processor Bus
Supply Voltage
(VDD1)
Internal Reference
Vref select
© NXP Laboratories UK 2011