Product Summary

The HCPL-7840 isolation amplifier was designed for current sensing in electronic motor drives. In a typical implementation, motor currents flow through an external resistor and the resulting analog voltage drop is sensed by the HCPL-7840. A differential output voltage is created on the other side of the HCPL-7840 optical isolation barrier. This differential output voltage is proportional to the motor current and can be converted to a single-ended signal by using an op-amp as shown in the recommended application circuit. The applications of the HCPL-7840 include Motor phase and rail current sensing, Inverter current sensing, Switched mode power supply signal isolation, General purpose current sensing and monitoring, General purpose analog signal isolation.

Parametrics

HCPL-7840 absolute maximum ratings: (1)Storage Temperature: -55 to 125 ℃; (2)Operating Temperature: - 40 to 100 ℃; (3)Supply Voltage: 0 to 5.5 V; (4)Steady-State Input Voltage: -2.0 to VDD1 +0.5 V; (5)2 Second Transient Input Voltage: -6.0 to VDD1 +0.5 V; (6)Output Voltage: -0.5 to VDD2 +0.5 V.

Features

HCPL-7840 features: (1)15 kV/μs common-mode rejection at VCM = 1000 V; (2)Compact, auto-insertable standard 8-pin DIP package; (3)0.00025 V/V/℃ gain drift vs. temperature; (4)0.3 mV input offset voltage; (5)100 kHz bandwidth; (6)0.004% nonlinearity; (7)Worldwide safety approval: UL 1577 (3750 Vrms/1 min.) and CSA, IEC/EN/DIN EN 60747-5-2 (Option #060 only); (8)Advanced Sigma-Delta (A/D converter technology); (9)Fully differential circuit topology; (10)0.8 μm CMOS IC technology.

Diagrams

HCPL-7840 functional diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
HCPL-7840
HCPL-7840

Avago Technologies

Isolation Amplifiers 4.5 - 5.5 SV 8 dB

Data Sheet

0-115: $2.74
115-250: $2.59
250-500: $2.44
500-1000: $2.29
HCPL-7840#060
HCPL-7840#060

Avago Technologies

Isolation Amplifiers 4.5 - 5.5 SV 8 dB

Data Sheet

0-115: $2.77
115-250: $2.61
250-500: $2.46
500-1000: $2.30
HCPL-7840#300
HCPL-7840#300

Avago Technologies

Isolation Amplifiers 4.5 - 5.5 SV 8 dB

Data Sheet

0-115: $2.77
115-250: $2.61
250-500: $2.46
500-1000: $2.30
HCPL-7840#560
HCPL-7840#560

Avago Technologies

Isolation Amplifiers 4.5 - 5.5 SV 8 dB

Data Sheet

0-625: $2.48
625-1000: $2.32
1000-2000: $2.24
HCPL-7840#500
HCPL-7840#500

Avago Technologies

Isolation Amplifiers 4.5 - 5.5 SV 8 dB

Data Sheet

0-625: $2.46
625-1000: $2.30
1000-2000: $2.23
HCPL-7840#360
HCPL-7840#360

Avago Technologies

Isolation Amplifiers 4.5 - 5.5 SV 8 dB

Data Sheet

0-115: $2.78
115-250: $2.63
250-500: $2.48
500-1000: $2.32
HCPL-7840-300E
HCPL-7840-300E

Avago Technologies

Isolation Amplifiers 4.5 - 5.5 SV 8 dB

Data Sheet

0-1: $3.46
1-25: $3.07
25-100: $2.77
100-250: $2.61
HCPL-7840-500E
HCPL-7840-500E

Avago Technologies

Isolation Amplifiers 4.5 - 5.5 SV 8 dB

Data Sheet

0-1: $3.46
1-25: $3.07
25-100: $2.77
100-250: $2.61