
MAXQ7667
16-Bit, RISC, Microcontroller-Based,
Ultrasonic Distance-Measuring System
6
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ELECTRICAL CHARACTERISTICS (continued)
(VDVDDIO = +5V, VAVDD = +3.3V; VDVDD = +2.5V, system clock (fSYSCLK) = 16MHz, burst frequency (fBURST) = bandpass frequency
(fBPF) = 50kHz, CREFBG = CREF = 1F in parallel with 0.01F, fADCCLK = 2MHz (SAR data rate = 125ksps), TA = TMIN to TMAX, unless
otherwise specified. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
+2.5V LINEAR REGULATOR (REG2P5)
REG2P5 Output Voltage
2.38
2.62
V
Load Current
50
mA
Output Short-Circuit Current
REG2P5 shorted to DGND
100
mA
POWER REQUIREMENTS
DVDD
2.25
2.5
2.75
AVDD
3.00
3.3
3.6
Supply Voltage Range
DVDDIO
4.5
5.0
5.5
V
All analog functions enabled
12
18
mA
All analog functions disabled
3
10
A
LNA
2.4
Sigma-delta ADC
12
mA
SAR ADC, 250ksps,
fADCCLK = 4MHz
600
PLL
300
Supply voltage
supervisors
3
Internal voltage
reference
220
Reference buffer
300
A
AVDD Supply Current
Incremental
AVDD supply
current
Bias (any AVDD
module enabled)
1.5
mA
DVDD Supply Current
11
mA
DVDDIO Supply Current
2.5
mA
DIGITAL INPUTS (GPIO, UART, JTAG, SPI)
Input High Voltage
VDVDDIO
- 1
V
Input Low Voltage
0.8
V
Input Hysteresis
VDVDDIO = 5.0V
500
mV
Input Leakage Current
Digital input voltage = DGND or
DVDDIO, pullup disabled
±0.01
±1
A
Pullup/Pulldown Resistance
Pulled up to DVDDIO internally, pulled
down to DGND internally
150
k
Input Capacitance
15
pF
SPI is a trademark of Motorola, Inc.