AD21B中文資料微芯科技數(shù)據(jù)手冊(cè)PDF規(guī)格書(shū)

Analog Features

? Up to 14-Channel, Software Selectable,

10/12-Bit Analog-to-Digital Converter:

- 12-bit, 200K samples/second conversion rate

(single Sample-and-Hold)

- Sleep mode operation

- Charge pump for operating at lower AVDD

- Band gap reference input feature

- Windowed threshold compare feature

- Auto-scan feature

? Three Analog Comparators with Input Multiplexing:

- Programmable reference voltage for

comparators

? LVD Interrupt Above/Below Programmable

VLVD Level

? Charge Time Measurement Unit (CTMU):

- Allows measurement of capacitance and time

- Operational in Sleep

Low-Power Features

? Sleep and Idle modes Selectively Shut Down

Peripherals and/or Core for Substantial Power

Reduction and Fast Wake-up

? Doze mode allows CPU to Run at a Lower Clock

Speed than Peripherals

? Alternate Clock modes allow On-the-Fly

Switching to a Lower Clock Speed for Selective

Power Reduction

Special Microcontroller Features

? Supply Voltage Range of 2.0V to 3.6V

? Dual Voltage Regulators:

- 1.8V core regulator

- 1.2V regulator for Retention Sleep mode

? Operating Ambient Temperature Range of

-40°C to +125°C

? ECC Flash Memory (256 Kbytes):

- Single Error Correction (SEC)

- Double Error Detection (DED)

- 10,000 erase/write cycle endurance, typical

- Data retention: 20 years minimum

- Self-programmable under software control

? 16-Kbyte SRAM

? Programmable Reference Clock Output

? In-Circuit Serial Programming? (ICSP?) and

In-Circuit Emulation (ICE) via 2 Pins

? JTAG Boundary Scan Support

? Fail-Safe Clock Monitor Operation:

- Detects clock failure and switches to on-chip,

Low-Power RC (LPRC) Oscillator

? Power-on Reset (POR), Brown-out Reset (BOR)

and Oscillator Start-up Timer (OST)

? Programmable Low-Voltage Detect (LVD)

? Flexible Watchdog Timer (WDT) with its Own

RC Oscillator for Reliable Operation