参数资料
| 型号： | AD7226KR |
| 厂商： | Analog Devices Inc |
| 文件页数： | 3/16页 |
| 文件大小： | 0K |
| 描述： | IC DAC 8BIT LC2MOS QUAD 20-SOIC |
| 产品培训模块： | Data Converter Fundamentals DAC Architectures |
| 标准包装： | 1 |
| 设置时间： | 4µs |
| 位数： | 8 |
| 数据接口： | 并联 |
| 转换器数目： | 4 |
| 电压电源： | 双 ± |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 20-SOIC W |
| 包装： | 管件 |
| 输出数目和类型： | 4 电压，单极；4 电压，双极 |
| 采样率（每秒）： | 143k |
REV.
AD7226
–11–
STAIRCASE WINDOW COMPARATOR
In many test systems, it is important to be able to determine
whether some parameter lies within defined limits. The staircase
window comparator of Figure 14a is a circuit that can be used,
for example, to measure the VOH and VOL thresholds of a TTL
device under test. Upper and lower limits on both VOH and VOL
can be programmably set using the AD7226. Each adjacent pair
of comparators forms a window of programmable size. If VTEST
lies within a window, then the output for that window will be
high. With a reference of 2.56 V applied to the VREF input, the
minimum window size is 10 mV.
VREF
VDD
AGND
VOUTA
VOUTB
VOUTC
VOUTD
VOH (HIGH)
VOL (HIGH)
VOH (LOW)
VOL (LOW)
VTEST
FROM D.U.T.
1/4 CA339
10k
5V
10k
5V
10k
5V
10k
WINDOW 5
WINDOW 4
WINDOW 3
WINDOW 2
WINDOW 1
AD7226
Figure 14a. Logic Level Measurement
VREF
AGND
VOUTA
VOUTB
VOUTC
VOUTD
WINDOW 5
WINDOW 4
WINDOW 3
WINDOW 2
WINDOW 1
Figure 14b. Window Structure
The circuit can easily be adapted to allow for overlapping of
windows as shown in Figure 15a. If the three outputs from this
circuit are decoded then five different nonoverlapping program-
mable windows can again be defined.
VREF
VDD
AGND
5V
10k
WINDOW 3
VOUTA
VOUTB
VOUTC
VOUTD
VTEST
FROM D.U.T.
10k
5V
10k
5V
WINDOW 2
WINDOW 1
AD7226
Figure 15a. Overlapping Windows
VREF
AGND
VOUTA
VOUTB
VOUTC
VOUTD
WINDOW 3
WINDOW 2
WINDOW 1
Figure 15b. Window Structure
DAC A
VREF
VDD
DGND
AGND
VSS
VOUTA
AD7226*
*DIGITAL INPUTS OMITTED
FOR CLARITY
+4V
–4V
+15V
15k
10k
Figure 16. Varying Reference Signal
VARYING REFERENCE SIGNAL
In some applications, it may be desirable to have a varying signal
applied to the reference input of the AD7226. The AD7226 has
multiplying capability within upper and lower limits of reference
voltage when operated with dual supplies. The upper and lower
limits are those required by the AD7226 to achieve its linearity
specification. Figure 16 shows a sine wave signal applied to the
reference input of the AD7226. For input signal frequencies up
to 50 kHz, the output distortion typically remains less than 0.1%.
Typical 3 dB bandwidth figure is 700 kHz.
D
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7226KR-REEL | 功能描述:IC DAC 8BIT QUAD W/AMP 20-SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 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 |
| AD7226KRS | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AD7226KRZ | 功能描述:IC DAC 8BIT LC2MOS QUAD 20-SOIC 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: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) |
| AD7226KRZ | 制造商:Analog Devices 功能描述:IC, DAC, 8BIT, 143KSPS, SOIC-20 |
| AD7226KRZ-REEL | 功能描述:IC DAC 8BIT QUAD W/AMP 20SOIC 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: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 |
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