Z8 Encore! XP
®
4K Series
Product Specification
114
2
Vrefsel
Internal Voltage
Reference Generator
VREF pin
VREFEXT
Analog Input
Multiplexer
ADC
Data
13
Ref Input
ANA0
ANA1
ANA2
ANA3
ANA4
ANA5
13 bit
Sigma-Delta
ADC
Analog In -
Analog In +
Buffer Amplifier
ANAIN
4
calibration
for offset
-
+
Analog Input
Multiplexer
ADC
IRQ
BUFFMODE
ANA0
ANA1
ANA2
ANA3
ANA4
ANA5
ANA6
ANA7
Amplifier tristates
when disabled
-
+
Low-Power Operational
Amplifier
Temp
Sensor
Figure 19.Analog-to-Digital Converter Block Diagram
Operation
Data Format
In both SINGLE-ENDED and DIFFERENTIAL modes, the effective output of the ADC is
an 11- bit, signed, two’s complement digital value. In DIFFERENTIAL mode, the ADC
PS022815-0206
Analog-to-Digital Converter