Datasheet ADUM5000 (Analog Devices) - 8

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ADuM5000 Data Sheet PIN CONFIGURATION AND FUNCTION DESCRIPTIONS VDD1 1 16 VISO GND1 2 15 GNDISO NC 3 14 NC ADuM5000 RCIN 4 13 V TOP VIEW SEL RC (Not to Scale) OUT 5 12 NC RCSEL 6 11 NC VDD1 7 10 VISO
003
GND1 8 9 GNDISO
07539-
NC = NO CONNECT
Figure 3. Pin Configuration
Table 12. Pin Function Descriptions Pin No. Mnemonic Description
1, 7 V Primary Supply Voltage 3.0 V to 5.5 V. Pin 1 and Pin 7 are internally connected to each other, and it is recom- DD1 mended that both pins be externally connected to a common power source. 2, 8 GND Ground 1. Ground reference for the primary side of the converter. Pin 2 and Pin 8 are internally connected to 1 each other, and it is recommended that both pins be connected to a common ground. 3, 11, 12, 14 NC No Internal Connection. 4 RC Regulation Control Input. In slave power configuration (RC = low), this pin is connected to the RC pin of a IN SEL OUT master isoPower device, or tied low to disable the converter. In master/standalone mode (RC = high), this pin SEL has no function. This pin is weakly pulled to low. In noisy environments, it should be tied to low or to a PWM control source. Note that this pin must not be tied high if RC is low; this combination causes excessive voltage SEL on the secondary side of the converter, damaging the ADuM5000 and possibly the devices that it powers. 5 RC Regulation Control Output. In master power configuration, this pin is connected to the RC pin of a slave OUT IN isoPower device to allow the ADuM5000 to regulate additional devices. 6 RC Control Input. Sets either self-regulation/master mode (RC high) or slave mode (RC low). This pin is weakly SEL SEL SEL pulled to the high state. In noisy environments, tie this pin either high or low. 9, 15 GND Ground Reference for the Secondary Side of the Converter. Pin 9 and Pin 15 are internally connected to each ISO other, and it is recommended that both pins be connected to a common ground. 10, 16 V Secondary Supply Voltage Output for External Loads, 3.3 V (V low) or 5.0 V (V high). 5.0 V output functionality ISO SEL SEL is not guaranteed for a 3.3 V primary supply input. Pin 10 and Pin 16 are internally connected to each other and connecting both externally is recommended. 13 V Output Voltage Selection. When V = V , the V setpoint is 5.0 V. When V = GND , the V setpoint is 3.3 V. SEL SEL ISO ISO SEL ISO ISO This pin is weakly pulled to high. In noisy environments, tie this pin either high or low. In slave regulation mode, this pin has no function.
Table 13. Truth Table (Positive Logic)1 RC RC RC V V V SEL IN OUT SEL DD1 ISO Input Input Output Input Input Output Operation
H X PWM2 H 5.0 V 5.0 V Master mode operation, self regulating. H X PWM2 L 5.0 V 3.3 V Master mode operation, self regulating. H X PWM2 H 3.3 V 5.0 V This configuration is not recommended due to poor efficiency. H X PWM2 L 3.3 V 3.3 V Master mode operation, self regulating. L RC RC X X3 X OUT(EXT) IN Slave mode, RC supplied by a master OUT(EXT) isoPower device. L L L X X 0 V Low power mode, converter disabled. L H H X X X Note that this combination of RC and RC is prohibited. Damage occurs IN SEL on the secondary side of the converter due to excess output voltage at V . RC must be low, or it must be connected to a PWM signal from a ISO IN master isoPower part. 1 X = don’t care. 2 PWM refers to the regulation control signal. This signal is derived from the secondary side regulator or from the RCIN input, depending on the value of RCSEL. 3 VDD1 must be common between all isoPower devices being regulated by a master isoPower part. Rev. B | Page 8 of 16 Document Outline Features Applications Functional Block Diagram General Description Table of Contents Revision History Specifications Electrical Characteristics—5 V Primary Input Supply/5 V Secondary Isolated Supply Electrical Characteristics—3.3 V Primary Input Supply/3.3 V Secondary Isolated Supply Electrical Characteristics—5 V Primary Input Supply/3.3 V Secondary Isolated Supply Package Characteristics Regulatory Information Insulation and Safety-Related Specifications IEC 60747-5-2 (VDE 0884, Part 2):2003-01 Insulation Characteristics Thermal Derating Curve Recommended Operating Conditions Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Applications Information PCB Layout Start-Up Behavior EMI Considerations Thermal Analysis Current Limit and Thermal Overload Protection Power Considerations Increasing Available Power Insulation Lifetime Outline Dimensions Ordering Guide