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| 型号： | EVAL-ADUC832QSZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 49/92页 |
| 文件大小： | 0K |
| 描述： | KIT DEV FOR ADUC832 QUICK START |
| 产品培训模块： | Process Control |
| 标准包装： | 1 |
| 系列： | QuickStart™ 套件 |
| 类型： | MCU |
| 适用于相关产品： | ADuC832 |
| 所含物品： | 评估板，线缆，电源，软件和文档 |
| 其它名称： | EVAL-ADUC832QS EVAL-ADUC832QS-ND |
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Data Sheet
ADuC832
Rev. B | Page 53 of 92
SOURCE/SINK CURRENT (mA)
4
0
5
10
15
O
UT
P
UT
V
O
L
T
AG
E
(
V
)
3
1
0
DAC LOADED WITH 0000H
DAC LOADED WITH 0FFFH
02
98
7-
0
43
Figure 54. Source and Sink Current Capability with VREF = AVDD = 3 V
To reduce the effects of the saturation of the output amplifier at
values close to ground and to give reduced offset and gain errors,
the internal buffer can be bypassed. This is done by setting the
DBUF bit in the CFG832 register. This allows a full rail-to-rail
output from the DAC, which should then be buffered externally
using a dual-supply op amp to obtain a rail-to-rail output. This
external buffer should be located as near as physically possible
to the DAC output pin on the PCB. Note that the unbuffered
mode only works in the 0 V to VREF range.
To drive significant loads with the DAC outputs, external
buffering may be required (even with the internal buffer
enabled), as illustrated in Figure 55. A list of recommended op
amps is shown in Table 20.
ADuC832
DAC0
DAC1
0
29
87
-0
44
Figure 55. Buffering the DAC Outputs
The DAC output buffer also features a high impedance disable
function. In the chip’s default power-on state, both DACs are
disabled, and their outputs are in a high impedance state (or
three-state) where they remain inactive until enabled in
software. This means that if a zero output is desired during
power-up or power-down transient conditions, then a pull-
down resistor must be added to each DAC output. Assuming
this resistor is in place, the DAC outputs remain at ground
potential whenever the DAC is disabled.
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| EVAL-ADUC834QS | 制造商:Analog Devices 功能描述:DATA ACQ SYS, MICROCNVRTR, DUAL 16BIT/24BIT - ADCS W/ EMBEDD - Bulk 制造商:Analog Devices 功能描述:8052 ADUC834 QUICKSTART DEV KIT |
| EVAL-ADUC834QSZ | 功能描述:KIT DEV QUICK START ADUC834 RoHS:是 类别:编程器，开发系统 >> 通用嵌入式开发板和套件（MCU、DSP、FPGA、CPLD等） 系列:QuickStart™ 套件 标准包装:1 系列:PICDEM™ 类型:MCU 适用于相关产品:PIC10F206，PIC16F690，PIC16F819 所含物品:板，线缆，元件，CD，PICkit 编程器 产品目录页面:659 (CN2011-ZH PDF) |
| EVAL-ADUC836QS | 制造商:Analog Devices 功能描述:MCU 8BIT 8052 CISC 62KB+4KB FLASH 3.6V 48LQFP - Bulk 制造商:Analog Devices 功能描述:KIT- ADUC836 DEV SYSTEM |
| EVAL-ADUC841QS | 制造商:AD 制造商全称:Analog Devices 功能描述:MicroConverter 12-Bit ADCs and DACs with Embedded High Speed 62-kB Flash MCU |
| EVAL-ADUC841QSP2 | 制造商:AD 制造商全称:Analog Devices 功能描述:MicroConverter 12-Bit ADCs and DACs with Embedded High Speed 62-kB Flash MCU |
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