User Manual

MAXQ2010
16-Bit Mixed-Signal Microcontroller with LCD
_______________________________________________________________________________________ 7
RECOMMENDED DC OPERATING CONDITIONS (continued)
(V
DVDD
= V
AVDD
= 2.7V to 3.6V, T
A
= -40°C to +85°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
External Reference Voltage
Input
V
AEREF
0.9
V
AVDD
+ 0.05
V
Internal Reference Voltage Drift V
ADRIFT
Guaranteed by design ±50 ppm/°C
Reference Settle Time
(Switching ADC Reference from
Either Internal or External
Reference to AV
DD
) (Note 16)
t
AAVDD_
SETUP
(Note 17)
4 Samples
SUPPLY VOLTAGE MONITOR
Supply Voltage Set Point V
SVM
2.7 3.5 V
Supply Voltage Increment
Resolution (Note 18)
SV
INC
0.08 0.1 0.12 V
Supply Voltage Default Set Point 2.7 μA
Supply Voltage Monitor Current
Consumption
I
SVM
20 μs
Supply Voltage Monitor Setup
Time (Time from Supply Voltage
Monitor Enabled to SVMRDY Is
Set to 1) (Note 18)
t
SVM_SU
15 25 μs
REAL-TIME CLOCK
RTC Input Frequency f
32KIN
32kHz watch crystal 32,768 Hz
V
DVDD
= 2.7V, guaranteed by design 0.45 0.7
RTC Operating Current I
RTC
V
DVDD
= 3.6V 0.5 0.8
μA
LCD
LCD Reference Voltage V
LCD
V
DVDD
3.6 V
LCD Bias Voltage 1 V
LCD1
1/3 bias
V
ADJ
+
2/3 (V
LCD
- V
ADJ
)
V
LCD Bias Voltage 2 V
LCD2
1/3 bias
V
ADJ
+
2/3 (V
LCD
- V
ADJ
)
V
LCD Adjustment Voltage V
ADJ
Guaranteed by design 0
0.4 x
V
LCD
V
LCD Bias Resistor R
LCD
40 k
LCD Adjustment Resistor R
LADJ
LRA[3:0] = 15 80 k
Pin is driven at V
LCD
= 3V, I
SEGxx
= -3μA
V
LCD
-
0.02
V
LCD
V
SEGxx
Pin is driven at V
LCD1
= 2V, I
SEGxx
= -3μA
V
LCD1
-
0.02
V
LCD1
+
0.02
Pin is driven at V
LCD2
= 1V, I
SEGxx
= -3μA
V
LCD2
-
0.02
V
LCD2
+
0.02
LCD Segment and COM Voltage
(Note 18)
t
LCD_RISE
Pin is driven at V
ADJ
= 0V, I
SEGxx
= -3μA -0.1 +0.1
V
LCD Output Rise Time t
LCD_RISE
COM output load = 5000pF, SEG output
load = 200pF, V
LCD
= 3.3V
200 μs