Rainbow-electronics MAXQ3120 Bedienungsanleitung PDF herunterladen (Seite 4)

MAXQ3120

High-Precision ADC

Mixed-Signal Microcontroller

4 _____________________________________________________________________

Note 1: Specifications to -40°C are guaranteed by design and not production tested. All typical values are guaranteed by design

characterization and are not production tested.

Note 2: Tested with T

= +25°C, DV

= 3.3V, and all peripherals inactive except for port pins.

Note 3: These numbers are guaranteed by design and are not tested.

Note 4: Can be calculated as (f

HFXIN

/ 6).

Note 5: Can be calculated as 6 / (f

HFXIN

x C

Note 6: Can be calculated as 12 / (f

HFXIN

x C

Note 7: Assumes that no external components are connected to V

LCD

, V

LCD1

, V

LCD2

, or V

ADJ

ELECTRICAL CHARACTERISTICS (continued)

(DV

, AV

= V

RST

to 3.6V, V

REF

= 1.25V (external), f

HFXIN

= 8MHz, T

= -40°C to +85°C, unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

UNITS

INTERNAL REFERENCE

Reference Output Voltage

1.25

±120

Reference-Output Temperature

Coefficient

With V

REF

bandgap trimming

(ATRM[4:0] = 01111b)

±35

ppm/°C

Load Regulation I

REF

= ±2µA, C

= 12pF

±50 ±500

µV/µA

LCD INTERFACE

LCD Reference Voltage V

LCD

LCD Bias Voltage 1 V

LCD1

Guaranteed by design

ADJ

+ 2/3

LCD

- V

ADJ

)

LCD Bias Voltage 2 V

LCD2

Guaranteed by design

ADJ

+ 1/3

LCD

- V

ADJ

)

LCD Adjustment Voltage (Note 7)

ADJ

Guaranteed by design 0

0.4 x

LCD

LCD Bias Resistor R

LCD

20 kΩ

LCD Adjust Resistor R

LADJ

LRA4:LRA0 = 0 40 kΩ

Segment is driven at V

LCD

; V

LCD

= 3V,

SEGxx

= -3µA, guaranteed by design

LCD

0.02

LCD

Segment is driven at V

LCD1

; V

LCD1

= 2V,

SEGxx

= -3µA, guaranteed by design

LCD1

0.02

LCD1

Segment is driven at V

LCD2

; V

LCD2

= 1V,

SEGxx

= -3µA, guaranteed by design

LCD2

0.02

LCD2

LCD Segment Voltage V

SEGxx

Segment is driven at V

ADJ

; V

ADJ

= 0V,

SEGxx

= +3µA, guaranteed by design

ADJ

0.1 V

CLOCK SOURCE

External Crystal Frequency f

HFXIN

MHz

REAL-TIME CLOCK

RTC Input Frequency f

32KIN

32kHz watch crystal

32.768

kHz

JTAG/FLASH PROGRAMMING

JTAG Clock Rate f

TCK

sysclk / 8

Mass erase

904

Flash Erase Time

Page erase

313

Flash Programming Time 17 µs

Write/Erase Cycles 1,000,000

Cycles

Data Retention 20

Years

1 2 3 4 5 6 7 8 9 ... 32 33

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