CA-IS1204W Isolated Sigma‐Delta Modulator for Current Sensing
| Price: |
$0.48-$0.53 |
$3.5-$3.9 |
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CA-IS1204W |
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The CA‐IS1204 device is series of precision isolated sigma‐delta (Σ‐Δ) modulator and optimized for shunt resistor‐based current sensing or other small signal measurement applications. The input current‐sense amplifier monitors current flow through a shunt (sense) resistor and the sigma‐delta modulator converts the analog input to a digital bit stream of 1's and 0's at a much higher frequency. The digital output stage of CA‐IS1204 provides uncoded CMOS bit‐stream output. The analog input‐side (high‐side) and digital output‐side
(low‐side) are separated by unique silicon oxide (SiO2) capacitive isolation barriers that provide up to 5kVRMS galvanic isolation per UL1577 certification, and isolator driver transfers the modulator output across this isolation barrier. In systems with different voltage domains, this isolation technical is typically used to protect the low voltage side from the high voltage side in case of any faults.These devices also feature up to 150kV/μs common mode transient immunity and enable efficient signal transmission in noisy environments.
The CA‐IS1204 device features low input voltage range (±250mV) that allows the use of small sense resistor to reduce power dissipation, a low (±2%, max) gain error ensures measurement accuracy. This device also features fail‐safe output to support high safety system design. The device is specified for operation with 5MHz to 21MHz clock input. The internal sigma‐delta modulator combined with an external digital decimation sinc3 filter can achieve 85 dB signal‐to‐noise ratio (SNR) at 78.1 Ksps.
The CA‐IS1204W is specified over the ‐40°C to +125°C operating temperature range and is available in 16‐pin SOIC wide body package.
Product Specification
| High lifetime |
>40 years |
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Low Gain Error and Drift
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±2% (max) @ 25°C gain error
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| Typical CMTI |
±150 kV/μs |
| Wide operating temperature range |
‐40°C to 125°C |
| Safety regulatory approvals |
▪ VDE 0884‐17 isolation certification(CA‐IS1200G)
▪ UL according to UL1577
▪ IEC 61010‐1:2010+A1 certifications
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Features
• Differential Input Voltage Range: ±250 mV
• Ultra‐Low Input Offset Voltage and Drift
▪ ±1mV (max) @ 25°C input offset voltage
• Low Gain Error and Drift
▪ ±2% (max) @ 25°C gain error
• Excellent AC Performance
▪ SNR: 85dB (typ)
▪ THD: ‐91dB (typ)
• Robust Isolation Barrier: ±150 kV/μs typical CMTI
• Fault Diagnostic Functions Improve System Safety
• Wide Operating Temperature Range: –40°C to 125°C
• 16‐pin wide‐body SOIC package
• Safety Regulatory Approvals:
▪ VDE 0884‐17 isolation certification
▪ UL according to UL1577
▪ IEC 61010‐1:2010+A1 certifications
Applications
• Industrial Motor Controls and Drives
• Uninterruptible Power Supplies (UPS)
• Isolated Power Supply
Packing & Delivery:
1. Shipping Method: Express (SF Express, DHL, TNT, FedEx, etc.), shipping charges are paid by the buyer.
2. Packaging Method: pressure-proof, moisture proof, shock-proof packaging.
3. Shipping Time: In stock items: 3-5 days. Lead Time orders: 45-65 days.
ONE-STOP Electronic Parts Supply Chain:
1. 18 years of experience in the electronic components industry
2. Online service provided by over 80+ sales and technical.
3. Serving over 4500 global customers.
4. Annual sales exceeding 50 million USD, have an upward trend every year.
5. During the industry downturn, our sales of Chinese brand chips increased against the trend. Contributed a significant portion of the company's performance.
6. In the recently years, most customers have reduced costs and adopted Chinese chip brands. From initially worrying about quality and not daring to try them out, our customers now are continuing to place orders every month.
7. Our Product line includes MCU, amplifiers, isolation devices, logic devices, power devices, etc.
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