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参数资料
| 型号： | AD8801 |
| 厂商： | Analog Devices, Inc. |
| 英文描述： | Octal 8-Bit TrimDAC with Power Shutdown(带电源关断的八路8位微调D/A转换器) |
| 中文描述： | 八进制8位功耗关断TrimDAC（带电源关断的八路8位微调的D / A转换器） |
| 文件页数： | 8/16页 |
| 文件大小： | 223K |
| 代理商： | AD8801 |
REV. A
–8–
AD8801/AD8803
HOURS OF OPERATION AT 150
°
C
0.04
–0.04
0
600
150
300
450
0
–0.02
0.02
V
DD
= +4.5V
V
REF
= +4.5V
SS = 162 PCS
x
+ 2
σ
C
x
x
– 2
σ
Figure 19. Full-Scale Error Accelerated by Burn-In
HOURS OF OPERATION AT 150
°
C
1.0
I
–1.0
0
600
150
300
450
0
–0.5
0.5
V
DD
= +4.5V
V
REF
= +4.5V
CODE = 55
H
SS = 162 PCS
x
+ 2
σ
x
x
– 2
σ
Figure 20. REF Input Resistance Accelerated by Burn-In
AD8801/
AD8803
V
DD
DGND
10μF
0.1μF
+
+5V
Figure 22. Recommended Supply Bypassing for the
AD8801/AD8803
Buffering the AD8801/AD8803 Output
In many cases, the nominal 5 k
output impedance of the
AD8801/AD8803 is sufficient to drive succeeding circuitry. If a
lower output impedance is required, an external amplifier can
be added. Several examples are shown in Figure 23. One ampli-
fier of an OP291 is used as a simple buffer to reduce the output
resistance of DAC A. T he OP291 was chosen primarily for its
rail-to-rail input and output operation, but it also offers opera-
tion to less than 3 V, low offset voltage, and low supply current.
T he next two DACs, B and C, are configured in a summing ar-
rangement where DAC C provides the coarse output voltage
setting and DAC B can be used for fine adjustment. T he inser-
tion of R1 in series with DAC B attenuates its contribution to
the voltage sum node at the DAC C output.
APPLIC AT IONS
Supply Bypassing
Precision analog products, such as the AD8801/AD8803, re-
quire a well filtered power source. Since the AD8801/AD8803
operate from a single +3 V to +5 V supply, it seems convenient
to simply tap into the digital logic power supply. Unfortunately,
the logic supply is often a switch-mode design, which generates
noise in the 20 kHz to 1 MHz range. In addition, fast logic gates
can generate glitches hundred of millivolts in amplitude due to
wiring resistances and inductances.
If possible, the AD8801/AD8803 should be powered directly
from the system power supply. T his arrangement, shown in Fig-
ure 21, will isolate the analog section from the logic switching
transients. Even if a separate power supply trace is not available,
however, generous supply bypassing will reduce supply-line in-
duced errors. Local supply bypassing consisting of a 10
μ
F tan-
talum electrolytic in parallel with a 0.1
μ
F ceramic capacitor is
recommended (Figure 22).
TTL/CMOS
LOGIC
CIRCUITS
+5V
POWER SUPPLY
10μF
TANT
0.1μF
AD8801/
AD8803
+
Figure 21. Use Separate Traces to Reduce Power Supply
Noise
相关PDF资料 |
PDF描述 |
|---|---|
| AD8803 | Octal 8-Bit TrimDAC with Power Shutdown(带电源关断八路8位微调D/A转换器) |
| AD8803AR | Octal 8-Bit TrimDAC with Power Shutdown |
| AD8803AN | Octal 8-Bit TrimDAC with Power Shutdown |
| AD8801AN | Octal 8-Bit TrimDAC with Power Shutdown |
| AD8801AR | Octal 8-Bit TrimDAC with Power Shutdown |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8801AN | 制造商:Rochester Electronics LLC 功能描述:8CH 8-BIT TRIMDAC W/PWR SHDN - Bulk |
| AD8801AR | 功能描述:IC DAC 8BIT OCTAL W/SD 16-SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:TrimDAC® 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）:* |
| AD8801AR-REEL | 功能描述:IC DAC 8BIT OCTAL W/SD 16-SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:TrimDAC® 产品培训模块:LTC263x 12-, 10-, and 8-Bit VOUT DAC Family 特色产品:LTC2636 - Octal 12-/10-/8-Bit SPI VOUT DACs with 10ppm/°C Reference 标准包装:91 系列:- 设置时间:4µs 位数:10 数据接口:MICROWIRE?，串行，SPI? 转换器数目:8 电压电源:单电源 功率耗散（最大）:2.7mW 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-WFDFN 裸露焊盘 供应商设备封装:14-DFN-EP（4x3） 包装:管件 输出数目和类型:8 电压，单极 采样率（每秒）:* |
| AD8801ARZ | 功能描述:IC DAC 8BIT OCTAL W/SD 16-SOIC RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:TrimDAC® 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) |
| AD8801ARZ-REEL | 功能描述:IC DAC 8BIT OCTAL W/SD 16SOIC RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:TrimDAC® 产品培训模块:LTC263x 12-, 10-, and 8-Bit VOUT DAC Family 特色产品:LTC2636 - Octal 12-/10-/8-Bit SPI VOUT DACs with 10ppm/°C Reference 标准包装:91 系列:- 设置时间:4µs 位数:10 数据接口:MICROWIRE?，串行，SPI? 转换器数目:8 电压电源:单电源 功率耗散（最大）:2.7mW 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-WFDFN 裸露焊盘 供应商设备封装:14-DFN-EP（4x3） 包装:管件 输出数目和类型:8 电压，单极 采样率（每秒）:* |
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