Shunyuan Technology Introduces Dual 0-5V/4-20mA Highly Integrated Isolated Converter
The ISO series of isolation amplifiers is a hybrid integrated circuit (IC) designed to isolate and proportionally convert analog signals. These devices are available in both active and passive configurations. The passive version includes internal circuits for current signal modulation, demodulation, and signal coupling, along with an ultra-low input impedance. This allows the IC to accept a wide input voltage range—typically 7.5V to 32V—eliminating the need for external power supplies and enabling long-distance signal transmission without distortion.
Built using advanced ceramic substrates, printed resistor technology, and innovative isolation techniques, these ICs meet stringent insulation requirements, such as 3KVAC, and are suitable for industrial environments that involve extreme temperatures, humidity, and vibration. The ISO 4-20mA series, for example, offers easy integration with no external components required, supporting functions like 4-20mA loop isolation, single-input two-output, or dual-input dual-output signal conversion.
On the other hand, the active IC integrates a highly isolated DC/DC power supply and a high-performance linear optocoupler on a single chip. In addition to powering the internal amplifier, it provides two sets of isolated positive and negative DC power supplies and two 5VDC reference sources for external use. This makes it ideal for applications requiring additional circuit expansion, such as bridge circuits or small-signal preamplifiers. With a signal bandwidth of up to 20kHz, these ICs can isolate, condition, and transform bidirectional DC signals (0~±10VDC) or AC signals (0~5VAC). Their compact size and minimal external component requirement make them perfect for various analog signal isolation and conversion tasks, including I/I, I/V, V/I, and V/V.
Key application areas include analog data acquisition, isolated signal transmission and power supply, industrial signal isolation, ground loop interference suppression, remote signal transmission without distortion, and sensor signal isolation in instrumentation and medical equipment.
Product Series:
- ISO 4-20mA Series – Two-wire passive 4-20mA signal isolation conditioning IC
- ISO-Ax-Px-Ox Series – DC current signal (I/V, I/I) isolation amplifier IC
- ISO-Ux-Px-Ox Series – DC voltage signal (V/I, V/V) isolation amplifier IC
- ISO1001/1002 Series – DC bidirectional or AC signal isolation amplifier IC
Product Features:
- High accuracy levels: 0.1%, 0.2%, 0.5%
- Excellent linearity across the full range (non-linearity < 0.01%)
- Supports standard signals: 0–10mA, 0–20mA, 4–20mA, 0–5V, 0–10V, 0–±5V, 1–5V
- Low input impedance and high output load capability
- Triple isolation: signal, input, and auxiliary power supply
- Single power supply option with isolated power at the signal input or output
- Cost-effective, compact design with standard SIP12 and DIP24 packages
- Industrial-grade operating temperature range
- Flame-retardant vacuum potting compliant with UL-94 standards
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