收藏本站
参数资料
型号： AD7243BQ
厂商： ANALOG DEVICES INC
元件分类： DAC
英文描述： LC2MOS 12-Bit Serial DACPORT
中文描述： SERIAL INPUT LOADING, 5 us SETTLING TIME, 12-BIT DAC, CDIP16
封装： CERDIP-16
文件页数： 8/12页
文件大小： 171K
代理商： AD7243BQ
AD7243
–8–
REV. A
APPLYING THE AD7243
Power Supply Decoupling
To achieve optimum performance when using the AD7243, the
V
DD
and V
SS
lines should each be decoupled to DGND using
0.1
μ
F capacitors. In noisy environments it is recommended
that 10
μ
F capacitors be connected in parallel with the 0.1
μ
F
capacitors.
The internal scaling resistors provided on the AD7243 allow
several output voltage ranges. The part can produce unipolar
output ranges of 0 V to +5 V or 0 V to +10 V and a bipolar out-
put range of
±
5 V. Connections for the various ranges are out-
lined below.
Unipolar (0 V to +10 V) Configuration
The first of the configurations provides an output voltage range
of 0 V to +10 V. This is achieved by connecting the output off-
set resistor R
OFS
(Pin 13) to AGND. Natural Binary data format
is selected by connecting
BIN
/COMP (Pin 4) to DGND. In this
configuration, the AD7243 can be operated using either single
or dual supplies. Note that the V
DD
supply must be
≥
+14.25 V
for this range in order to maintain sufficient amplifier head-
room. Dual supplies may be used to improve settling time and
give increased current sink capability for the amplifier. Figure 9
shows the connection diagram for unipolar operation of the
AD7243. Table I shows the digital code vs. analog output for
this configuration.
DAC
AGND
DGND
REFOUT
REFIN
R
OFS
V
OUT
V
DD
2R
2R
AD7243*
BIN/
COMP
0V OR V
SS
0V TO + 10V
*ADDITIONAL PINS OMITTED FOR CLARITY
V
DD
V
SS
Figure 9. Unipolar (0 V to +10 V) Configuration
Table I. Unipolar Code Table (0 V to +10 V Range)
Input Data Word
MSB
LSB
Analog Output, V
OUT
XXXX 1111 1111 1111
XXXX 1000 0000 0001
XXXX 1000 0000 0000
XXXX 0111 1111 1111
XXXX 0000 0000 0001
XXXX 0000 0000 0000
+2 REFIN
×
(4095/4096)
+2 REFIN
×
(2049/4096)
+2 REFIN
×
(2048/4096) = +REFIN
+2 REFIN
×
(2047/4096)
+2 REFIN
×
(1/4096)
0 V
X = Don’t Care.
Note: 1 LSB = 2 REFIN/4096.
Unipolar (0 V to +5 V) Configuration
The 0 V to +5 V output voltage range is achieved by connecting
R
OFS
to V
OUT
. Once again, the AD7243 can be operated using
either single or dual supplies. The table for output voltage vs.
digital code is as in Table I, with 2REFIN replaced by REFIN.
Note, for this range, 1 LSB = REFIN (2
–12
) = (REFIN/4096).
Bipolar ( 5 V) Configuration
The bipolar configuration for the AD7243, which gives an out-
put range of –5 V to +5 V, is achieved by connecting R
OFS
to
REFIN. The AD7243 must be operated from dual supplies to
achieve this output voltage range. Either offset binary or two’s
complement data format may be selected. Figure 10 shows the
connection diagram for bipolar operation. An AD586 provides
the reference voltage for the DAC but this could be provided by
the on-chip reference by connecting REFOUT to REFIN.
V
DD
DAC
AGND
DGND
REFIN
R
OFS
2R
2R
AD7243*
BIN/ COMP
–
5V TO + 5V
*ADDITIONAL PINS OMITTED FOR CLARITY
AD586
GND
+V
IN
V
OUT
V
DD
V
SS
V
SS
V
OUT
V
DD
Figure 10. Bipolar Configuration with External Reference
Bipolar Operation (Two’s Complement Data Format)
The AD7243 is configured for two’s complement data format
by connecting
BIN
/COMP (Pin 4) high. The analog output vs.
digital code is shown in Table II.
Table II. Two’s Complement Bipolar Code Table
Input Data Word
MSB
LSB
Analog Output, V
OUT
XXXX 0111 1111 1111
XXXX 0000 0000 0001
XXXX 0000 0000 0000
XXXX 1111 1111 1111
XXXX 1000 0000 0001
XXXX 1000 0000 0000
+REFIN
×
(2047/2048)
+REFIN
×
(1/2048)
0 V
–REFIN
×
(1/2048)
–REFIN
×
(2047/2048)
–REFIN
×
(2048/2048) = –REFIN
X = Don’t Care.
Note: 1 LSB = REFIN/2048.
Bipolar Operation (Offset Binary Data Format)
The AD7243 is configured for Offset Binary data format by
connecting
BIN
/COMP (Pin 4) low. The analog output vs. digi-
tal code may be obtained by inverting the MSB in Table II.
相关PDF资料
PDF描述
AD7243BR SM IC/74HC08 SO-14 QUAD 2-IN
AD7243SQ2 LC2MOS 12-Bit Serial DACPORT
AD7247A LC2MOS Dual 12-Bit DACPORTs
AD7237A LC2MOS Dual 12-Bit DACPORTs
AD7237AAN CAPACITOR, 10UF, 50V ELECTROLYTIC, RADIAL
相关代理商/技术参数
参数描述
AD7243BR 功能描述:IC DAC 12BIT W/AMP W/REF 16-SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:DACPORT® 产品培训模块:Data Converter Fundamentals DAC Architectures 标准包装:750 系列:- 设置时间:7µs 位数:16 数据接口:并联 转换器数目:1 电压电源:双 ± 功率耗散（最大）:100mW 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-LCC（J 形引线） 供应商设备封装:28-PLCC（11.51x11.51） 包装:带卷 (TR) 输出数目和类型:1 电压，单极；1 电压，双极 采样率（每秒）:143k
AD7243BR-REEL 功能描述:IC DAC 12BIT W/AMP W/REF 16-SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:DACPORT® 产品培训模块:Data Converter Fundamentals DAC Architectures 标准包装:750 系列:- 设置时间:7µs 位数:16 数据接口:并联 转换器数目:1 电压电源:双 ± 功率耗散（最大）:100mW 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-LCC（J 形引线） 供应商设备封装:28-PLCC（11.51x11.51） 包装:带卷 (TR) 输出数目和类型:1 电压，单极；1 电压，双极 采样率（每秒）:143k
AD7243BRZ 功能描述:IC DAC 12BIT SRL LC2MOS 16SOIC RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:DACPORT® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 设置时间:4µs 位数:12 数据接口:串行 转换器数目:2 电压电源:单电源 功率耗散（最大）:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-uMAX 包装:管件 输出数目和类型:2 电压，单极 采样率（每秒）:* 产品目录页面:1398 (CN2011-ZH PDF)
AD7243BRZ-REEL 功能描述:IC SRL DAC 12BIT LC2MOS 16-SOIC RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:DACPORT® 标准包装:47 系列:- 设置时间:2µs 位数:14 数据接口:并联 转换器数目:1 电压电源:单电源 功率耗散（最大）:55µW 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:管件 输出数目和类型:1 电流，单极；1 电流，双极 采样率（每秒）:*
AD7243SQ 制造商:未知厂家 制造商全称:未知厂家 功能描述:STANDARD MICROCIRCUIT DRAWING
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*