Catalogs >
ADI >
ADUM7702

ADUM7702
22Pages

Catalog excerpts

16-Bit, Isolated, Sigma-Delta Modulator ADuM7702 Data Sheet FEATURES FUNCTIONAL BLOCK DIAGRAM VDD2 DATA ENCODER DATA DECODER 5 MHz to 21 MHz master clock input frequency Offset drift vs. temperature: ±0.25 µV/°C SNR: 82 dB typical 16 bits, no missing codes Full-scale analog input voltage range: ±64 mV ENOB: 13 bits typical IDD1: 10 mA maximum On-board digital isolator Operating temperature range: −40°C to +125°C High isolation common-mode transient immunity: 150 kV/µs minimum, VDD2 = 3.3 V Wide-body SOICs 16-lead SOIC_W 8-lead SOIC_IC with increased creepage Safety and regulatory approvals UL recognition 5700 V rms for 1 minute per UL 1577 CSA Component Acceptance Notice 5A VDE Certificate of Conformity DIN V VDE V 0884-10: VIORM = 1270 VPEAK DIN V VDE V 0884-11: VIORM = 1060 VPEAK (pending) APPLICATIONS Shunt current monitoring AC motor controls Power and solar inverters Wind turbine inverters Analog-to-digital and optoisolator replacement GENERAL DESCRIPTION The ADuM7702 is a high performance, second-order, Σ-Δ modulator that converts an analog input signal to a high speed, single-bit data stream, with on-chip digital isolation based on Analog Devices, Inc., iCoupler® technology. The device operates from a 4.5 V to 5.5 V power supply range (VDD1) and accepts a pseudo differential input signal of ±50 mV (±64 mV full-scale). The pseudo differential input is ideally suited to shunt voltage monitoring in high voltage applications where galvanic isolation is required. The analog input is continuously sampled by a high performance analog modulator and converted to a ones density digital output stream with a data rate of up to 21 MHz. The original information can be reconstructed with an appropriate sinc3 digital filter to achieve an 82 dB signal-to-noise ratio (SNR) at 78.1 kSPS with a 256 decimation rate and a 20 MHz master clock. The serial input and output operates from a 5 V or a 3 V supply (VDD2). The serial interface is digitally isolated. High speed complementary metal-oxide semiconductor (CMOS) technology, combined with monolithic transformer technology, results in on-chip isolation providing outstanding performance characteristics, superior to alternatives such as optocoupler devices. The ADuM7702 is available in both a 16-lead SOIC_W and an 8-lead SOIC_IC and has an operating temperature range of −40°C to +125°C. Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2020 Analog Devices, Inc. All rights reserved. Technical Su

Open the catalog to page 1

Data Sheet REVISION HISTORY 7/2020—Revision 0: Initial Version

Open the catalog to page 2

Data Sheet SPECIFICATIONS Vddi = 4.5 V to 5.5 V, Vdd2 = 3 V to 5.5 V, Vin+ = -50 mV to +50 mV, Vin- = 0 V, Ta = -40°C to +125°C, and MCLKIN frequency (fMCLKiN) = 20 MHz, tested with a sinc3 filter, and a 256 decimation rate, unless otherwise noted.

Open the catalog to page 3

*SEE NOTE 1 OF TABLE 2 FOR FURTHER DETAILS Figure 2. Data Timing Diagram

Open the catalog to page 4

Data SheetPACKAGE CHARACTERISTICS Table 3. 1 The device is considered a 2-terminal device. For the 16-lead SOIC_W, Pin 1 to Pin 8 are shorted together and Pin 9 to Pin 16 are shorted together. For the 8-lead SOIC_IC, Pin 1 to Pin 4 are shorted together and Pin 5 to Pin 8 are shorted together. Table 4. Parameter Input to Output Momentary Withstand Voltage Minimum External Air Gap (Clearance)1, 2 Symbol Value Viso 5700 min Test Conditions/Comments 1 minute duration mm Measured from input terminals to output terminals, shortest distance through air mm Measured from input terminals to output...

Open the catalog to page 5

Data Sheet DIN V VDE V 0884-10 INSULATION CHARACTERISTICS This isolator is suitable for reinforced electrical isolation only within the safety limit data. Maintenance of the safety data is ensured by means of protective circuits. Table 6. Description INSTALLATION CLASSIFICATION PER DIN VDE 0110 For Rated Mains Voltage ≤300 V rms For Rated Mains Voltage ≤450 V rms For Rated Mains Voltage ≤600 V rms CLIMATIC CLASSIFICATION POLLUTION DEGREE (DIN VDE 0110, TABLE 1) MAXIMUM WORKING INSULATION VOLTAGE INPUT TO OUTPUT TEST VOLTAGE, METHOD B1 VIORM × 1.875 = VPR, 100% Production Test, tm = 1...

Open the catalog to page 6

Data Sheet DIN V VDE V 0884-11 INSULATION CHARACTERISTICS (PENDING) This isolator is suitable for reinforced electrical isolation only within the safety limit data. Maintenance of the safety data is ensured by means of protective circuits. Table 7. Description INSTALLATION CLASSIFICATION PER DIN VDE 0110 For Rated Mains Voltage ≤300 V rms For Rated Mains Voltage ≤450 V rms For Rated Mains Voltage ≤600 V rms CLIMATIC CLASSIFICATION POLLUTION DEGREE (DIN VDE 0110, TABLE 1) MAXIMUM WORKING INSULATION VOLTAGE INPUT TO OUTPUT TEST VOLTAGE, METHOD B1 VIORM × 1.875 = VPR, 100% Production Test, tm...

Open the catalog to page 7

Data Sheet Parameter Vddi to GNDi Vdd2 to GND2 Analog Input Voltage to GNDi Digital Input Voltage to GND2 Digital Output Voltage to GND2 Input Current to Any Pin Except Supplies1 Output Current from Any Pin Except Supplies Temperature Operating Range Storage Range Junction Pb-Free, Soldering Reflow ABSOLUTE MAXIMUM RATINGS Ta = 25°C, unless otherwise noted. All voltages are relative to their respective GNDx. 1 Transient currents of up to 100 mA do not cause silicon controlled rectifier (SCR) to latch up. Stresses at or above those listed under Absolute Maximum Ratings may cause permanent...

Open the catalog to page 8

Data Sheet PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS NIC1 1 13 MCLKIN TOP VIEW (Not to Scale) 12 NIC2 NOTES 1. NIC1 = NOT INTERNALLY CONNECTED. THESE PINS ARE NOT INTERNALLY CONNECTED. CONNECT TO VDD1, GND1, OR LEAVE FLOATING. 2. NIC2 = NOT INTERNALLY CONNECTED. THESE PINS ARE NOT INTERNALLY CONNECTED. CONNECT TO VDD2, GND2, OR LEAVE FLOATING. Figure 5. 16-Lead SOIC_W Pin Configuration Table 12. 16-Lead SOIC_W Pin Function Descriptions Pin No. 1, 5, 6 Description Not Internally Connected. These pins are not internally connected. Connect these pins to VDD1, GND1, or leave floating....

Open the catalog to page 9