maxq7667 Maxim Integrated Products, Inc., maxq7667 Datasheet - Page 4

• Manufacturer Part Number: maxq7667
• Description: 16-bit, Risc, Microcontroller-based, Ultrasonic Distance-measuring System
• Manufacturer: Maxim Integrated Products, Inc.

16-Bit, RISC, Microcontroller-Based,
Ultrasonic Distance-Measuring System
ELECTRICAL CHARACTERISTICS (continued)
(V
(f
otherwise specified. Typical values are at T
4
BPF
REFERENCE BUFFER
Offset
Minimum Load
Output Bypass Capacitor
EXTERNAL VOLTAGE REFERENCE (Reference Buffer Disabled)
Reference Input Range
Reference Input Impedance
INTERNAL VOLTAGE REFERENCE (REFBG)
Initial Accuracy
Maximum Temperature
Coefficient
Output Impedance
Power-Supply Rejection Ratio
Output Noise
PROGRAMMABLE BURST-FREQUENCY OSCILLATOR
Burst-Frequency Range
Burst-Frequency Resolution
Burst-Frequency Locking
Time
CRYSTAL OSCILLATOR
Frequency Range
Temperature Stability
Startup Time
XIN Input Low Voltage
XIN Input High Voltage
INTERNAL RC OSCILLATOR
Frequency
Initial Accuracy
Temperature Drift
Supply Rejection
DVDDIO
_______________________________________________________________________________________
) = 50kHz, C
PARAMETER
= +5V, V
REFBG
AVDD
= C
= +3.3V; V
REF
= 1µF in parallel with 0.01µF, f
SYMBOL
DVDD
= +2.5V, system clock (f
A
= +25°C.)
Applied at REF
Measured at REF with the SAR and
sigma-delta ADCs running at
maximum frequency
V
Change from 40kHz to 60kHz
Change from 50kHz to 50.5kHz
Tested crystal frequency
Minimum crystal frequency
External clock input
Excluding crystal
16MHz crystal
When driven with external clock source
When driven with external clock source
T
V
A
AVDD
DVDD
= T
MIN
= 3.0V to 3.6V
= 2.25V to 2.75V
to T
CONDITIONS
MAX
ADCCLK
SYSCLK
= 2MHz (SAR data rate = 125ksps), T
) = 16MHz, burst frequency (f
V
0.025
0.7 x
2.45
MIN
DVDD
2.5
1.0
4
TYP
0.47
13.5
10.5
100
700
-1.5
2.5
1.1
0.5
0.1
50
60
16
25
10
5
5
2
4
BURST
A
) = bandpass frequency
= T
V
V
1.335
MAX
0.3 x
2.55
DVDD
AVDD
16
MIN
to T
MAX
ppm/°C
ppm/°C
mV
UNITS
MHz
MHz
MHz
ppm
mV
ms
ms
, unless
kΩ
kΩ
kΩ
dB
µF
%
%
%
V
V
V
V
RMS