参数资料
| 型号： | AD7841BSZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 4/13页 |
| 文件大小： | 0K |
| 描述： | IC DAC 14BIT OCTAL V-OUT 44-MQFP |
| 产品培训模块： | Data Converter Fundamentals DAC Architectures |
| 标准包装： | 1 |
| 设置时间： | 31µs |
| 位数： | 14 |
| 数据接口： | 并联 |
| 转换器数目： | 8 |
| 电压电源： | 模拟和数字，双 ± |
| 功率耗散（最大）： | 303mW |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-QFP |
| 供应商设备封装： | 44-MQFP（10x10） |
| 包装： | 托盘 |
| 输出数目和类型： | 8 电压，单极；8 电压，双极 |
| 采样率（每秒）： | 32k |
| 产品目录页面： | 785 (CN2011-ZH PDF) |
| 配用： | EVAL-AD7841EBZ-ND - BOARD EVAL FOR AD7841 |
AD7841
–12–
GND
VDD
8/10-BIT
DAC
GND
VDD
8/10-BIT
DAC
LOGIC LEVEL
SHIFT
+5V
5V
SCLK
D IN
FSIN/CS
SCLK
D IN
FSIN/CS
0V TO +5V
0V TO
5V
VREF(+)AB
A0, A1, A2
VOUTA
VOUTB
VREF( )AB
AD7841*
GND
DATA BUS
ADDR
DECODER
ADDR BUS
SDATA
SCLK
DATA BUS
CONTROLLER
*ADDITIONAL PINS OMITTED FOR CLARITY
Figure 13. Programmable Reference Generation for the AD7841
The AD8803 has an output voltage range of GND to VDD (0 V
to 5 V). To trim the VREF(+) input, the appropriate trim range
on the AD8803 DAC can be set using the VREFL and VREFH pins
allowing 8 bits of resolution between the two points. This will
allow the VREF(+) pin to be adjusted to remove gain errors.
To trim the VREF(–) voltage, some method of providing a trim
voltage in the required negative voltage range is required. Neither
the AD7804 or the AD8803 can provide this range in normal
operation as their output range is 0 V to 5 V. There are two
methods of producing this negative voltage. One method is to
provide a positive output voltage and then to level shift that ana-
log voltage to the required negative range. Alternatively these
DACs can be operated with supplies of 0 V and –5 V, with the
VDD pin connected to 0 V and the GND pin connected to –5 V.
Now these can be used to provide the negative reference volt-
ages for the VREF(–) inputs on the AD7841. However, the digital
signals driving the DACs need to be level-shifted from the 0 V
to +5 V range to the –5 V to 0 V range. Figure 13 shows a
typical application circuit to provide programmable reference
capabilities for the AD7841.
REV. B
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7841BSZ | 制造商:Analog Devices 功能描述:IC 14-BIT DAC |
| AD7841BSZ-REEL | 功能描述:IC DAC 14BIT OCTAL VOUT 44-MQFP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1,000 系列:- 设置时间:1µs 位数:8 数据接口:串行 转换器数目:8 电压电源:双 ± 功率耗散（最大）:941mW 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-SOIC（0.295"，7.50mm 宽） 供应商设备封装:24-SOIC W 包装:带卷 (TR) 输出数目和类型:8 电压，单极 采样率（每秒）:* |
| AD7843 | 制造商:AD 制造商全称:Analog Devices 功能描述:Touch Screen Digitizer |
| AD7843ARQ | 制造商:Analog Devices 功能描述:TOUCH SCREEN DIGITIZER 制造商:Rochester Electronics LLC 功能描述:2.7V 12-BIT TOUCH SCREN DIGITIZER I.C. - Bulk 制造商:Analog Devices 功能描述:IC 12-BIT ADC |
| AD7843ARQ-REEL | 制造商:Analog Devices 功能描述:TOUCH SCREEN DIGITIZER 制造商:Rochester Electronics LLC 功能描述:2.7V 12-BIT TOUCH SCREN DIGITIZER I.C. - Tape and Reel |
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