HCPL-7851

Available Set Gain :
Input Voltage Range (Max) :
Operating Supply Voltage :
Maximum Power Dissipation :
Packaging :
Number of Channels : Single
Maximum Operating Temperature : + 125 C
Input Offset Voltage : 5 mV
Mounting Style : Through Hole
Package / Case : DIP-8
Minimum Operating Temperature : - 55 C
Common Mode Rejection Ratio (Min) : 69 dB
Supply Current : 15.5 mA


Features:

• Performance Guaranteed over Full Military Temperature Range: 55°C to +125°C
• Manufactured and Tested on a MIL-PRF-38534 Certified Line
• Hermetically Sealed Packages
• Dual Marked with Device Part Number and DSCC Drawing Number
• QML-38534, Class H
• HCPL-7840 Function Compatibility
• High Common Mode Rejection (CMR): 8 kV/ms at VCM = 1000 V
• 5% Gain Tolerance
• 0.1% Nonlinearity
• Low Offset Voltage and Offset Temperature Coefficient
• 100 kHz Bandwidth




Application

• Industrial and Military
• High Reliability Systems
• Harsh Industrial Environments
• Transportation, Medical, and Life Critical Systems
• General Purpose Analog Signal Isolation
• Motor Phase and Rail Current Sensing
• Inverter Current Sensing
• Switched Mode Power Supply Signal Isolation
• General Purpose Current Sensing and Monitoring




Pinout






Specifications

Storage Temperature (TS) ...........................................65 to +150°C
Operating Temperature (TA) .........................................55 to +125°C
Supply Voltages (VDD1, VDD2) ......................................... 0.0 to +5.5 V
Steady-State Input Voltage (VIN+, VIN) .....2.0 V to V_DD1 +0.5 V (1/)
2 Second Transient Input Voltage ............. 6.0 V to V_DD1 +0.5 V (1/)
Output Voltages (VOUT+, VOUT) .........................0.5 to V_DD2 +0.5 V
Lead Soldering Temperature (soldering, 10 seconds max.) ........ +260°C




Description

The HCPL-7851 is a high reliability Class H isolation amplifier that provides accurate, electrically isolated and amplified representations of voltage and current. When used with a shunt resistor to monitor the motor phase current in a high speed motor drive, the HCPL-7851 will offer superior reliability compared with the traditional solutions such as current transformers and Hall-effect sensors. This HCPL-7851 consists of a sigma-delta analog-to-digital converter optically coupled to a digital-to-analog converter in a hermetically sealed 8-Pin ceramic DIP package with gold plated leads. Solder dipped leads and various lead forms options are also available. See the datasheet for details.
The HCPL-7851 products are capable of operation and storage over the full military temperature range and may be purchased as either commercial product or from the DSCC SMD 5962-97557. The HCPL-7851 is manufactured and tested on a MIL-PRF-38534 certified line and included in the DSCC Qualified Manufactures List, QML-38534 for Hybrid Microcircuits.
Superior performance in design critical specifications such as common-mode rejection, offset voltage, nonlinearity, and operating temperature make this product an excellent choice for designing reliable products such as motor controllers and inverters.
Common-mode rejection of 8 kV/micro-second makes the HCPL-7850/7851 suitable for noisy electrical environments such as those generated by the high switching rates of power IGBTs.Low offset voltage together with a low offset voltage temperature coefficient permits accurate use of auto-calibration techniques. Gain tolerance of 5% with 0.1% nonlinearity further provide the performance necessary for accurate feedback and control.