Maxim Integrated MAXQ7667 - Manual (Page 5)

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MAXQ7667 User’s Guide
BURST ENABLE
AVDD/2
120k Ω
LNA AVDD/2
0mV
2mV
-1
MUX
BURST OUTPUT,
DUTY CYCLE, AND
PULSE COUNTER
SIGMA-DELTA
ADC
SIGMA-DELTA
ADC
DIGITAL
BANDPASS
FILTER
RAM
2K x 16
ROM
2K x 16
16 x 16
HW MULT
+ ACCUM
FLASH
8K x 16
OR
16K x 16
INTERNAL
REGULATORS
16-BIT 16-MIPS
MICROCONTROLLER
PROGRAMMABLE
PLL-BASED OSCILLATOR
VOLTAGE
REFERENCE
FULL WAVE
DETECTOR
THRESHOLD
ADJUST
SYSTEM
TIMER
TIMER 2
CRYSTAL
OSCILLATOR
16MHz (MAX)
INTERNAL
OSCILLATOR
WATCHDOG
POR/
BROWNOUT
UART
(LIN)
TIMER 1 TIMER 0
T0B_CMPO T0
DIGITAL
LOWPASS
FILTER
120k Ω
3k Ω
3k Ω
0.47 µF
REFBG
0.47 µF 0.47 µF
REFSAR REFECHO
AIN0 BURST
ECHON
470pF
0.01 µF
ECHOP
GATE5
AVDD
DVDD
GND
Rx
Tx
DVDDIO
REG3P3
REG2P5
+5.0V DVDDIO
BSP129
AVDD
330pF
THERMISTOR
BATTERY+
AIN1
AIN2
AIN3
AIN4
AIN5
FILT
T1 T2
16MHz
20pF 20pF
T2B RESET
CLOCK PRESCALERS
DIVIDE BY 1 TO 128
FIFO
33nF
24k Ω
470pF
0.01 µF
0.1 µF
0.1 µF
0.1 µF
TRANSCEIVER
CONNECTOR
V+
GROUND
SIGNAL
+9V TO
+20V
MAXQ7667
Typical Application Circuit