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AMC1204-Q1
Automotive, ±250-mV input, precision current sensing basic isolated modulator
Data sheet
AMC1204-Q1
- Qualified for Automotive Applications
- AEC-Q100 Qualified With the Following Results
- Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range - Device HBM ESD Classification Level H2
- Device CDM ESD Classification Level C3B
- Device Temperature Grade 1: –40°C to 125°C
- ±250-mV Input Voltage Range Optimized for Shunt Resistors
- Certified Digital Isolation:
- CSA, IEC60747-5-2, and UL1577 Approved
- Isolation Voltage: 4250 VPEAK
- Working Voltage: 1200 VPEAK
- Transient Immunity: 15 kV/µs
- Long Isolation Barrier Lifetime (see Application Report SLLA197)
- High Electromagnetic Field Immunity
(see Application Note SLLA181A) - Outstanding AC Performance:
- SNR: 84 dB (min)
- THD: –80 dB (max)
- Excellent DC Precision:
- INL: ±8 LSB (max)
- Gain Error: ±2.5% (max)
- External Clock Input for Easier Synchronization
- Fully Specified Over the Extended Automotive Temperature Range
The AMC1204-Q1 is a 1-bit digital output, isolated delta-sigma (ΔΣ) modulators that can be clocked at up to 20 MHz. The digital isolation of the modulator output is provided by a silicon dioxide (SiO2) barrier that is highly resistant to magnetic interference. This barrier has been certified to provide basic galvanic isolation of up to 4250 VPEAK according to UL1577, IEC60747-5-2, and CSA standards or specifications.
The AMC1204-Q1 provides a single-chip solution for measuring the small signal of a shunt resistor across an isolated barrier. These types of resistors are typically used to sense currents in motor control inverters, green energy generation systems, and other industrial applications. The AMC1204-Q1 differential inputs easily connect to the shunt resistor or other low-level signal sources. An internal reference eliminates the need for external components. When used with an appropriate external digital filter, an effective number of bits (ENOB) of 14 is achieved at a data rate of 78 kSPS.
A 5-V analog supply (AVDD) is used by the modulator while the isolated digital interface operates from a 3-V, 3.3-V, or 5-V supply (DVDD). The AMC1204-Q1 is available in SO-16 (DW) packages and are specified from –40°C to 125°C.
Technical documentation
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Evaluation board
AMC1204EVM — AMC1204 evaluation module for 1-bit, 20-MHz, second-order, isolated delta-sigma modulator
The AMC1204 is an isolated single-channel delta-sigma (ΔΣ) modulator used in high-resolution measurement applications including current monitoring, industrial process control and motor positioning systems. The AMC1204EVM is a small form factor board containing all the necessary (...)
User guide: PDF
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SOIC (DW) | 16 | Ultra Librarian |
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