
MAXQ7667
16-Bit, RISC, Microcontroller-Based,
Ultrasonic Distance-Measuring System
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11
REG2P5 REGULATOR OUTPUT VOLTAGE
vs. LOAD CURRENT
MAXQ7667
toc17
REG2P5 LOAD CURRENT (mA)
REG2P5
REGULATOR
OUTPUT
VOLTAGE
(V)
60
40
2.5
2.0
1.5
1.0
0.5
3.0
0
0120
100
20
80
RC OSCILLATOR FREQUENCY
vs. TEMPERATURE
MAXQ7667
toc18
TEMPERATURE (
°C)
RC
OSCILLATOR
FREQUENCY
(MHz)
075
25
-25
100
50
13.5
12.5
13.0
14.0
14.5
15.0
12.0
-50
125
VDVDD = 2.25V
VDVDD = 2.75V
VDVDD = 2.50V
DVDDIO REGULATOR OUTPUT VOLTAGE
vs. LOAD CURRENT
MAXQ7667
toc15
DVDDIO LOAD CURRENT (mA)
DVDDIO
REGULATOR
OUTPUT
VOLTAGE
(V)
100
50
5.0
4.5
4.0
3.5
5.5
3.0
0
200
150
DRAIN = 8V
DRAIN = 14V
EXTERNAL VOLTAGE SOURCE CONNECTED
TO THE DRAIN OF EXTERNAL PASS
TRANSISTOR BSP129
REG3P3 REGULATOR OUTPUT VOLTAGE
vs. LOAD CURRENT
MAXQ7667
toc16
REG3P3 LOAD CURRENT (mA)
REG3P3
REGULATOR
OUTPUT
VOLTAGE
(V)
60
40
3.0
2.5
2.0
1.5
1.0
0.5
3.5
0
120
100
20
80
Typical Operating Characteristics (continued)
(VDVDDIO = +5V, VAVDD = +3.3V, VDVDD = +2.5V, fSYSCLK = 16MHz, burst frequency = bandpass frequency = 50kHz, TA = +25°C,
unless otherwise noted.)