MAXQ7667 datasheet(6/40 Pages) MAXIM

6 / 40 page

16-Bit, RISC, Microcontroller-Based,

Ultrasonic Distance-Measuring System

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VDVDDIO = +5V, VAVDD = +3.3V; VDVDD = +2.5V, system clock (fSYSCLK) = 16MHz, burst frequency (fBURST) = bandpass frequency

(fBPF) = 50kHz, CREFBG = CREF = 1µF in parallel with 0.01µF, 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

Load Current

Output Short-Circuit Current

REG2P5 shorted to DGND

100

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

All analog functions enabled

All analog functions disabled

µA

LNA

2.4

Sigma-delta ADC

SAR ADC, 250ksps,

fADCCLK = 4MHz

600

PLL

300

Supply voltage

supervisors

Internal voltage

reference

220

Reference buffer

300

µA

AVDD Supply Current

Incremental

AVDD supply

current

Bias (any AVDD

module enabled)

1.5

DVDD Supply Current

DVDDIO Supply Current

2.5

DIGITAL INPUTS (GPIO, UART, JTAG, SPI™)

Input High Voltage

VDVDDIO

- 1

Input Low Voltage

0.8

Input Hysteresis

VDVDDIO = 5.0V

500

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

Input Capacitance

SPI is a trademark of Motorola, Inc.

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