參數(shù)資料
型號(hào): ADUC7128BCPZ126-RL
廠商: Analog Devices Inc
文件頁數(shù): 32/92頁
文件大?。?/td> 0K
描述: IC DAS MCU ARM7 ADC/DDS 64-LFCSP
產(chǎn)品培訓(xùn)模塊: ARM7 Applications & Tools
Intro to ARM7 Core & Microconverters
Direct Digital Synthesis Tutorial Series (1 of 7): Introduction
標(biāo)準(zhǔn)包裝: 1
系列: MicroConverter® ADuC7xxx
核心處理器: ARM7
芯體尺寸: 16/32-位
速度: 41.78MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: PLA,POR,PWM,PSM,溫度傳感器,WDT
輸入/輸出數(shù): 28
程序存儲(chǔ)器容量: 126KB(63K x 16)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 8K x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 10x12b; D/A 1x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 125°C
封裝/外殼: 64-LFQFN 裸露焊盤,CSP
包裝: 標(biāo)準(zhǔn)包裝
配用: EVAL-ADUC7128QSPZ-ND - KIT DEV FOR ADUC7128
其它名稱: ADUC7128BCPZ126-RLDKR
ADuC7128/ADuC7129
Rev. 0 | Page 38 of 92
BAND GAP REFERENCE
The ADuC7128/ADuC7129 provide an on-chip band gap
reference of 2.5 V that can be used for the ADC and for the
DAC. This internal reference also appears on the VREF pin.
When using the internal reference, a capacitor of 0.47 μF must
be connected from the external VREF pin to AGND to ensure
stability and fast response during ADC conversions. This
reference can also be connected to an external pin (VREF)
and used as a reference for other circuits in the system.
An external buffer is required because of the low drive capability
of the VREF output. A programmable option also allows an external
reference input on the VREF pin. Note that it is not possible to
disable the internal reference. Therefore, the external reference
source must be capable of overdriving the internal reference source.
The band gap reference interface consists of an 8-bit REFCON
MMR, described in Table 40.
Table 40. REFCON MMR Bit Designations
Bit
Description
7:1
Reserved.
0
Internal Reference Output Enable.
Set by user to connect the internal 2.5 V reference to the VREF pin. The reference can be used for external components but needs
to be buffered.
Cleared by user to disconnect the reference from the VREF pin.
Note: The on-chip DAC is functional only with the internal reference output enable bit set. It does not work with an external
reference.
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