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| 型号： | AD8253ARMZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 13/24页 |
| 文件大小： | 0K |
| 描述： | IC AMP INST ICMOS LDRIFT 10MSOP |
| 标准包装： | 3,000 |
| 系列： | iCMOS® |
| 放大器类型： | 仪表 |
| 电路数： | 1 |
| 转换速率： | 20 V/µs |
| -3db带宽： | 10MHz |
| 电流 - 输入偏压： | 5nA |
| 电压 - 输入偏移： | 150µV |
| 电流 - 电源： | 4.6mA |
| 电流 - 输出 / 通道： | 37mA |
| 电压 - 电源，单路/双路(±)： | ±5 V ~ 15 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 带卷 (TR) |
AD8253
Data Sheet
Rev. B | Page 20 of 24
R
AD8253
+15V
+IN
–IN
0.1F
10F
0.1F
REF
VOUT
–15V
CD
CC
0
698
3-
0
57
Figure 58. RFI Suppression
Values of R and CC should be chosen to minimize RFI.
Mismatch between the R × CC at the positive input and the
R × CC at negative input degrades the CMRR of the AD8253.
By using a value of CD that is 10 times larger than the value of
CC, the effect of the mismatch is reduced and performance is
improved.
DRIVING AN ANALOG-TO-DIGITAL CONVERTER
An instrumentation amplifier is often used in front of an analog-
to-digital converter to provide CMRR. Usually, instrumentation
amplifiers require a buffer to drive an ADC. However, the low
output noise, low distortion, and low settle time of the AD8253
make it an excellent ADC driver.
In this example, a 1 nF capacitor and a 49.9 Ω resistor create an
antialiasing filter for the AD7612. The 1 nF capacitor also serves
to store and deliver necessary charge to the switched capacitor
input of the ADC. The 49.9 Ω series resistor reduces the burden
of the 1 nF load from the amplifier and isolates it from the kickback
current injected from the switched capacitor input of the AD7612.
Selecting too small a resistor improves the correlation between
the voltage at the output of the AD8253 and the voltage at the
input of the AD7612 but may destabilize the AD8253. A trade-
off must be made between selecting a resistor small enough to
maintain accuracy and large enough to maintain stability.
0.1μF
1nF
49.9
AD7612
ADR435
+12V
–12V
+5V
+15V
–15V
A0
A1
WR
+IN
–IN
10μF0.1F
REF
AD8253
DGND
06
98
3-
0
58
Figure 59. Driving an ADC
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8253ARMZ-RL1 | 制造商:AD 制造商全称:Analog Devices 功能描述:10 MHz, 20 V/レs, G = 1, 10, 100, 1000 i CMOS㈢ Programmable Gain Instrumentation Amplifier |
| AD8253-EVALZ | 制造商:Analog Devices 功能描述:Evaluation Kit For 10 MHz, 20 V/US, G 1, 10, 100, 1000 CMOS Programmable Gain Instrumentation Amplifier 制造商:Analog Devices 功能描述:EVAL KIT FOR 10 MHZ, 20 V/US, G = 1, 10, 100, 1000 I CMOS PR - Boxed Product (Development Kits) |
| AD8253-EVALZ1 | 制造商:AD 制造商全称:Analog Devices 功能描述:10 MHz, 20 V/レs, G = 1, 10, 100, 1000 i CMOS㈢ Programmable Gain Instrumentation Amplifier |
| AD82550A | 制造商:AD 制造商全称:Analog Devices 功能描述:Stereo Digital Audio Amplifier with Headphone Driver |
| AD82551A | 制造商:ESMT 制造商全称:Elite Semiconductor Memory Technology Inc. 功能描述:Stereo Digital Audio Amplifier with Headphone Driver |
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