Datasheet

MAXQ7667
16-Bit, RISC, Microcontroller-Based,
Ultrasonic Distance-Measuring System
6 _______________________________________________________________________________________
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
+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 µA
LNA 2.4
Sigma-delta ADC 12
mA
SAR ADC, 250ksps,
f
ADCCLK
= 4MHz
600
PLL 300
Supply voltage
supervisors
3
Internal voltage
reference
220
Reference buffer 300
µA
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
V
DVDDIO
- 1
V
Input Low Voltage 0.8 V
Input Hysteresis V
DVDDIO
= 5.0V 500 mV
Input Leakage Current
Digital input voltage = DGND or
DVDDIO, pullup disabled
±0.01 ±1 µA
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.