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MAX9632 Datasheet(PDF) 9 Page - Maxim Integrated Products |
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MAX9632 Datasheet(HTML) 9 Page - Maxim Integrated Products |
9 / 14 page _______________________________________________________________________________________ 9 36V, Precision, Low-Noise, Wide-Band Amplifier Careful layout technique helps optimize performance by decreasing the amount of stray capacitance at the op amp’s inputs and outputs. To decrease stray capaci- tance, minimize trace lengths by placing external com- ponents close to the op amp’s pins. For high-frequency designs, ground vias are critical to provide a ground return path for high-frequency signals and should be placed near the decoupling capacitors. Signal routing should be short and direct to avoid para- sitic effects. Avoid using right angle connectors since they may introduce a capacitive discontinuity and ulti- mately limit the frequency response. Electrostatic Discharge (ESD) The IC has built-in circuits to protect it from ESD events. An ESD event produces a short, high-voltage pulse that is transformed into a short current pulse once it discharges through the device. The built-in protection circuit provides a current path around the op amp that prevents it from being damaged. The energy absorbed by the protection circuit is dissipated as heat. ESD protection is guaranteed up to Q8kV with the Human Body Model (HBM). The Human Body Model simulates the ESD phenomenon wherein a charged body directly transfers its accumulated electrostatic charge to the ESD-sensitive device. A common example of this phe- nomenon is when a person accumulates static charge by walking across a carpet and then transfers all of the charge to an ESD-sensitive device by touching it. Not all ESD events involve the transfer of charge into the device. ESD from a charged device to another body is also a common form of ESD. If a charged device comes into contact with another conductive body that is at a lower potential, it discharges into that body. Such an ESD event is known as Charged Device Model (CDM) ESD, which can be even more destructive than HBM ESD (despite its shorter pulse duration) because of its high current. The IC guarantees CDM ESD protection up to Q1kV. Driving High-Resolution Sigma-Delta ADCs The MAX9632’s excellent AC specifications and 55MHz bandwidth are a good fit for driving high-speed, precision delta-sigma ADCs. These ADCs require an ultra-low noise op amp to achieve signal-to-noise ratios (SNR) better than 100dB. The MAX11040 is a 24-bit, 4-channel, simultane- ous-sampling ADC with 117dB SNR at 1ksps and 106dB at 16ksps. The MAX11040 measures analog inputs up to Q 2.2V. Sampling up to 64ksps, the MAX11040 achieves better than -94dB THD and 94dB SFDR. The MAX11040 measures four differential inputs simulta- neously, outputting the data through an SPI™ interface to allow daisy-chaining the data outputs and inputs together. Therefore, up to eight MAX11040 devices can be placed in parallel to measure up to 32 inputs simulta- neously. This is ideal for 3-phase power monitoring that requires multiple current and voltage readings and very wide dynamic range. The Typical Application Circuit shows an example of the MAX9632 driving the MAX11040. Chip Information PROCESS: BiCMOS SPI is a trademark of Mototrola, Inc. |
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