Miniature isolation amplifier Broadcom ACPL-C784-500E with high precision current sensing and noise rejection
Product Overview
The ACPL-C78A/C780/C784 family of miniature isolation amplifiers are designed for high-precision current sensing in electronic motor drives and general analog signal isolation applications. These devices leverage advanced sigma-delta (-) analog-to-digital converter technology, chopper-stabilized amplifiers, and a fully differential circuit topology to provide exceptional isolation-mode noise rejection, high common-mode transient slew rate immunity (up to 15 kV/s), and excellent accuracy and stability over time and temperature. They are housed in a compact, auto-insertable Stretched SO-8 (SSO-8) package, meeting worldwide regulatory safety standards, making them ideal for high-noise motor control environments requiring accurate monitoring of motor current for smoother control, and for general analog signal isolation under severe noise conditions.
Product Attributes
- Brand: Avago Technologies
- Certifications: UL 1577 (5000 Vrms/1 min.), CSA, IEC/EN/DIN EN 60747-5-5
- Package: Stretched SO-8 (SSO-8)
Technical Specifications
| Model | Description | Gain Tolerance | Common-Mode Rejection (CMR) | Bandwidth | Nonlinearity | Input Offset Voltage | Gain Drift vs. Temperature | Package Type | Safety Approval |
|---|---|---|---|---|---|---|---|---|---|
| ACPL-C78A | Miniature Isolation Amplifier | 1% | 15 kV/s | 100 kHz | 0.004% | 0.3 mV | 0.00025 V/V/C | Stretched SO-8 | UL 1577, CSA, IEC/EN/DIN EN 60747-5-5 |
| ACPL-C780 | Miniature Isolation Amplifier | 3% | 15 kV/s | 100 kHz | 0.004% | 0.3 mV | 0.00025 V/V/C | Stretched SO-8 | UL 1577, CSA, IEC/EN/DIN EN 60747-5-5 |
| ACPL-C784 | Miniature Isolation Amplifier | 5% | 15 kV/s | 100 kHz | 0.004% | 0.3 mV | 0.00025 V/V/C | Stretched SO-8 | UL 1577, CSA, IEC/EN/DIN EN 60747-5-5 |
| Parameter | Symbol | Value | Units | Conditions |
|---|---|---|---|---|
| Input Offset Voltage | VOS | -2 to 2 | mV | TA = 25C |
| Input Offset Voltage | VOS | -3 to 3 | mV | TA = 40C to +85C |
| Gain (ACPL-C78A) | G1 | 7.92 to 8.08 | V/V | VIN+ = 200 mV to +200 mV, TA = 25C |
| Gain (ACPL-C780) | G3 | 7.76 to 8.24 | V/V | VIN+ = 200 mV to +200 mV, TA = 25C |
| Gain (ACPL-C784) | G5 | 7.6 to 8.4 | V/V | VIN+ = 200 mV to +200 mV, TA = 25C |
| Nonlinearity (200 mV Input) | NL200 | 0.0037 to 0.35 | % | VIN+ = 200 mV to +200 mV |
| Small-Signal Bandwidth (-3 dB) | f3 dB | 50 to 100 | kHz | VIN+ = 200 mVpk-pk sine wave |
| Input-Output Momentary Withstand Voltage | VISO | 5000 | Vrms | t = 1 min., TA = 25C |
| Supply Voltage | VDD1, VDD2 | 4.5 to 5.5 | V | |
| Ambient Operating Temperature | TA | -40 to +85 | C |
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