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AMC1203_15

更新时间： 2024-11-05 01:20:39
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
29页 990K
描述
1-Bit, 10MHz, 2nd-Order, Isolated Delta-Sigma Modulator

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AMC1203_15 数据手册

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AMC1203  
www.ti.com  
SBAS427C –FEBRUARY 2008–REVISED JUNE 2011  
1-Bit, 10MHz, 2nd-Order, Isolated Delta-Sigma Modulator  
Check for Samples: AMC1203  
1
FEATURES  
DESCRIPTION  
The AMC1203 is a 1-bit, 10MHz, isolated delta-sigma  
(ΔΣ) modulator with an output buffer separated from  
the input interface circuitry by a silicon dioxide (SiO2)  
isolation barrier. This barrier provides galvanic  
isolation of up to 4000VPEAK. Used in conjunction with  
isolated power supplies, these devices prevent noise  
currents on a data bus or other circuits from entering  
the local ground and interfering with or damaging  
sensitive circuitry.  
2
•
•
•
•
•
•
•
16-Bit Resolution  
SNR: 80.5dB min  
THD: –88dB max (AMC1203B)  
±280mV Input Range with +5V Supply  
Internal 2.5V Reference Voltage: 1% Accuracy  
Gain Error: ±1% (AMC1203B)  
UL1577, IEC60747-5-2 (VDE0884, Rev. 2), and  
IEC61010-1 Approved  
The AMC1203 modulator operates from a +5V supply  
with a dynamic range of 95dB. The differential inputs  
are ideal for direct connection to shunt resistors or  
other low-level signal sources. With the appropriate  
digital filter and modulator rate, the device can be  
used to achieve 16-bit analog-to-digital (A/D)  
conversion with no missing codes. An effective  
resolution of 14 bits and an SNR of 85dB (typical)  
can be maintained with a sinc3 filter with a decimation  
ratio of 256.  
–
Isolation: 4000VPEAK,  
Working Voltage: 560V  
Transient Immunity: 15kV/μs  
–
•
•
Typical 25-Year Life at Rated Working Voltage  
(see Application Report SLLA197)  
Specified Temperature Range:  
–40°C to +105°C  
APPLICATIONS  
•
Shunt Based Current Sensing in:  
The modulator output is translated to a balanced  
signal and then transferred by the capacitive isolation  
barrier. Across the isolation barrier, a differential  
comparator receives the logic transition information,  
and then sets or resets a flip-flop and the output  
circuit accordingly.  
–
–
–
–
Motor Control  
Uninterruptible Power Supplies  
Power Inverters  
Industrial Process Control  
The AMC1203 is available in SOP-8 gull-wing,  
SOP-8, and SOIC-16 packages. The AMC1203 is  
characterized for operation over the ambient  
temperature range of –40°C to +105°C.  
Isolation Barrier  
+
VIN+  
-
2nd-Order  
Output  
MDAT  
Buffer  
VREF  
DS Modulator  
+
VIN-  
-
POR  
BIAS  
POR  
+
Buffer  
20MHz  
RC  
-
Output  
Buffer  
VREF  
MCLK  
Oscillator  
2.5V  
+
VREF  
-
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
All trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2008–2011, Texas Instruments Incorporated  
 
 
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