Electrical characteristics (continued) – Rainbow Electronics MAXQ7667 User Manual
Page 5
MAXQ7667
16-Bit, RISC, Microcontroller-Based,
Ultrasonic Distance-Measuring System
_______________________________________________________________________________________
5
ELECTRICAL CHARACTERISTICS (continued)
(V
DVDDIO
= +5V, V
AVDD
= +3.3V; V
DVDD
= +2.5V, system clock (f
SYSCLK
) = 16MHz, burst frequency (f
BURST
) = bandpass frequency
(f
BPF
) = 50kHz, C
REFBG
= C
REF
= 1µF in parallel with 0.01µF, f
ADCCLK
= 2MHz (SAR data rate = 125ksps), T
A
= T
MIN
to T
MAX
, unless
otherwise specified. Typical values are at T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Adjustable Frequency Range
Using the RCTRM register
-40
+40
%
Frequency Adjustment
Resolution
0.2
%
SUPPLY VOLTAGE SUPERVISORS
DVDD
Reset Threshold
Asserts
RESET if V
DVDD
falls below
this threshold
2.10
2.25
V
DVDD Interrupt Threshold
Generates an interrupt if V
DVDD
falls
below this threshold
2.25
2.38
V
Minimum Reset and Interrupt
Threshold Difference
150
mV
AVDD Interrupt Threshold
Generates an interrupt if V
AVDD
falls
below this threshold
2.95
3.15
V
DVDDIO Interrupt Threshold
Generates an interrupt if V
DVDDIO
falls
below this threshold
4.5
4.75
V
Supervisor Operating Range
At DVDD
1.5
2.75
V
Supervisor Hysteresis
1
%
RESET Release Delay
After V
DVDD
rises above the reset
threshold
35
µs
Power-Up Time
Time from
RESET is released to the
execution of the first instruction (serial
bootloader off)
1
µs
+5V LINEAR REGULATOR (DVDDIO, GATE5, Requires External Pass Transistor, see the Typical Application
Circuit/Functional Diagram)
Regulator Output Voltage
At DVDDIO
4.75
5.25
V
GATE5 Output High Voltage
I
SOURCE
= 0µA (no load)
V
DVDDIO
- 0.1
V
GATE5 Output Low Voltage
I
SINK
= 500µA
2
V
GATE5 Output Resistance
I
SINK
= 0µA to 50µA
330
Ω
Gain Bandwidth
DVDDIO to GATE5
1.58
kHz
Gain
DVDDIO to GATE5
1700
V/V
GATE5 Slew Rate
4.3
V/ms
Maximum Load Capacitance
Maximum capacitance on DVDDIO
when using an external pass transistor
1
µF
+3.3V LINEAR REGULATOR (REG3P3)
REG3P3 Output Voltage
3.15
3.45
V
Load Current
50
mA
Output Short-Circuit Current
REG3P3 shorted to AGND
150
mA