MAXQ7667AACM/V+T【PDF 12/40 页】IC MCU-BASED DAS 16BIT 48-LQFP

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MAXQ7667

16-Bit, RISC, Microcontroller-Based,

Ultrasonic Distance-Measuring System

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(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.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

DVDDIO, GATE5, REG3P3, REG2P5 to

DGND ................................................................-0.3V to +6.0V

AVDD to AGND .....................................................-0.3V to +4.0V

DVDD to DGND .....................................................-0.3V to +3.0V

DVDDIO to DVDD..................................................-0.3V to +6.0V

AVDD to DVDD......................................................-0.3V to +4.0V

AGND to DGND.....................................................-0.3V to +0.3V

Digital Inputs/Outputs to DGND..........-0.3V to (VDVDDIO + 0.3V)

Analog Inputs/Outputs to AGND ............-0.3V to (VAVDD + 0.3V)

XIN, XOUT to DGND ..............................-0.3V to (VDVDD + 0.3V)

Maximum Current into Any Pin............................................50mA

Continuous Power Dissipation (TA = +70°C)

48-Pin LQFP (derate 21.7mW/°C above +70°C).....1739.1mW

Operating Temperature Range .........................-40°C to +125°C

Storage Temperature Range .............................-60°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

ECHO INPUT (Low-Noise Amplifier and Sigma-Delta ADC)

VGA gain adjust = 1.55VP-P/LSB

5.6

Input-Referred Noise

(Note 1)

VGA gain adjust = 0.1VP-P/LSB

0.7

VRMS

VGA gain adjust = 1.55VP-P/LSB

Minimum Detectable Signal

VGA gain adjust = 0.1VP-P/LSB

VP-P

VGA gain adjust = 1.55VP-P/LSB,

unclipped

100

Operating Input Range

VGA gain adjust = 0.1VP-P/LSB,

unclipped

6.7

mVP-P

VGA gain adjust

= 1.55VP-P/LSB

1.55

Programmable Gain

From echo input to

bandpass filter in

reply to input

VGA gain adjust

= 0.1VP-P/LSB

0.1

VP-P/LSB

Programmable-Gain Adjust

Resolution

(Note 2)

LNA Bandwidth

150

kHz

ADC Sampling Rate

80 x fBPF

kHz

ADC Output Data Rate

10 x fBPF

kHz

ADC Output Data Resolution

Bits

Echo-Input Resistance

RIN

For each echo input

Echo-Input Capacitance

Echo-Input DC Bias Voltage

VAVDD/2

Maximum Overvoltage

Recovery Time

Recover from 2VP-P input

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