Details, datasheet, quote on part number: ACPL-C799-500E
CompanyBroadcom Corporation
DatasheetDownload ACPL-C799-500E datasheet
ACPL-C799-500E photo


Features, Applications
Optically Isolated 50 mV Sigma-Delta Modulator Data Sheet

The Avago Technologies' a 1-bit, second-order sigma-delta modulator converts an analog input signal into a high-speed data stream with galvanic isolation based on optical coupling technology. The ACPL-C799 operates from a 5V power supply with dynamic range 77 dB with an appropriate digital filter. The differential inputs 50 mV (full scale 80 mV) are ideal for direct connection to shunt resistors or other low-level signal sources in applications, such as motor phase current measurement. The analog input is continuously sampled by a means of sigma-delta over-sampling using an on-board clock. The signal information is contained in the modulator data, as a density of ones with data rate of 10 MHz, and the data are encoded and transmitted across the isolation boundary where they are recovered and decoded into high-speed data stream of digital ones and zeros. The original signal information can be reconstructed with a digital filter. The serial interface for data and clock has a wide supply range to 5.5V. Combined with superior optical coupling technology, the modulator delivers high noise margins and excellent immunity against isolation-mode transients. With 0.5 mm minimum distance through insulation (DTI), the ACPL-C799 provides reliable reinforced insulation and high working insulation voltage, which is suitable for fail-safe designs. This outstanding isolation performance is superior to alternatives including devices based on capacitive- or magnetic-coupling with DTI in micro-meter range. Offered in a Stretched SO-8 (SSO-8) package, the isolated ADC delivers the reliability, small size, superior isolation and over-temperature performance motor drive designers need to accurately measure current at much lower price compared to traditional current transducers.


10-MHz internal clock 1-bit, second-order sigma-delta modulator 16 bits resolution no missing codes (12 bits ENOB) 77 dB SNR typ 1.3 V/C maximum offset drift 1% gain error Internal reference voltage 50 mV linear range with single 5 V supply (80 mV full scale) to 5.5V wide supply range for digital interface to +105C operating temperature range SSO-8 package 25 kV/s common-mode transient immunity Safety and regulatory approval: IEC/EN/DIN 60747-5-5: 1414 Vpeak working insulation voltage 5000 Vrms/1 min isolation voltage CSA: Component Acceptance Notice #5


Motor phase and rail current sensing Power inverter current sensing Industrial process control Data acquisition systems General purpose current sensing Traditional current transducer replacements It is advised that normal static precautions be taken in handling and assembly of this component to prevent damage and/or degradation that may be induced by ESD. The components featured in this data sheet are not to be used in military or aerospace applications or environments.

Table 1 Pin Descriptions Pin No. Symbol VDD1 VIN+ VINGND1 GND2 MDAT MCLK VDD2 Description Supply voltage for signal input side (analog side), relative to GND1 Positive analog input, recommended input range 50 mV Negative analog input, recommended input range 50 mV (normally connected to GND1) Supply ground for signal input side Supply ground for data/clock output side (digital side) Modulator data output Modulator clock output Supply voltage for data output side, relative to GND2

Table 2 Ordering Information Part Number ACPL-C799 Option (RoHS Compliant) -000E -500E Package Stretched SO-8 Surface Mount X Tape & Reel IEC/EN/DIN 60747-5-5 X Quantity 80 per tube 1000 per reel

To order, choose a part number from the part number column and combine with the desired option from the option column to form an order entry. Example: ACPL-C799-500E to order product of Surface Mount package in Tape and Reel packaging with IEC/EN/DIN EN 60747-5-5 Safety Approval and RoHS compliance. Option data sheets are available. Contact your Avago sales representative or authorized distributor for information.


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