AD693AD - 4-20mA Signal Conditioner | Analog Devices
MPN: AD693AD ✓ NakahandaAD693AD Ulas
A 4-20 mA current-loop transmitter is a signal-conditioning device that converts a low-voltage sensor or transducer signal into a standardized current carried over a two-wire cable. The current format allows sensing and power to share the same conductors, making the AD693AD relevant to industrial instrumentation, process measurement, and remote sensor interfaces. Its loop-powered architecture separates the available loop power from the low-level signal being conditioned.
The AD693AD integrates a five-amplifier instrumentation-amplifier front end, an on-chip reference, and an auxiliary amplifier. Precalibrated input spans include 30 mV and 60 mV, with spans between those values also characterized when operated as a loop-powered transmitter. Precalibrated output configurations include 4-20 mA unipolar, 0-20 mA unipolar, and an 8 mA bipolar output, giving designers several standardized current-output choices.
The AD693AD is designed for transducer interfaces that require low-level amplification and current-loop output in one compact circuit. Its stated input offset voltage is 200 microvolts, while the loop-powered architecture supports equipment located far from the control or monitoring electronics. The integrated reference and auxiliary amplifier reduce the number of external signal-conditioning functions required for compatible sensor designs.
Typical applications include resistive temperature detector interfaces, process-control transmitters, industrial pressure and temperature instrumentation, and remote two-wire sensor loops. The manufacturer specifically identifies a precalibrated 100 ohm RTD interface, while the broader low-level input capability supports transducers whose output can be accommodated by the configured input span.
For a new design, confirm the selected input span, output range, external resistor values, pin assignment, and compensation requirements in the AD693 datasheet before layout. Because the device powers itself from the loop, verify that the available loop voltage remains within the stated 12 V to 36 V operating range after accounting for cable and load effects.
This product record consolidates the AD693AD functional description, package information, current-loop configurations, engineering use cases, and substitution limitations. The comparison also distinguishes verified characteristics from parameters that require confirmation in the manufacturer datasheet, helping engineers plan a sensor-transmitter design without assuming unverified electrical details.
Mga alternatibo na pwedeng ilagay na AD693AD — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok AD693AD (parehas na form factor at footprint) — pagkakaiba sa Package, Product Type, Mounting Type, RTD Interface, Auxiliary Amplifier.
Wala ng magagamit na drop-in alternatibo para sa produkto na ito.
Hilingin ang AlternatiboAD693AD Mga Spesipikasyon
| Product Type | Monolithic 4-20 mA loop-powered sensor signal conditioner |
| Input Signal Type | Voltage |
| Output Signal Type | Current |
| Output Current Range | 0-20 mA or 4-20 mA, depending on configuration |
| Supply Voltage Range | 12 V to 36 V |
| Precalibrated Input Spans | 30 mV and 60 mV |
| Offset Voltage | 200 uV |
| Amplifier Configuration | 5-amplifier instrumentation-amplifier front end |
| Integrated Reference | On-chip voltage reference |
| Auxiliary Amplifier | Integrated auxiliary amplifier |
| Powering Method | Loop-powered from a two-wire current loop |
| RTD Interface | Precalibrated 100 ohm RTD interface |
| Packhaging | 20-lead ceramic DIP |
| Bilang ng Pin | 20 pins |
| Uri ng Pagpapasok | Through-hole |
Gabay sa Pin Configuration ng AD693AD 20-lead ceramic dip
Pin configuration para sa AD693AD (20-lead ceramic dip package). Ang pagnunumero ng pin, mga function, at connection diagram ay tinukoy sa datasheet ng manufacturer. Sumangguni dito para sa eksaktong footprint at mga alituntunin sa soldering.
Wala ng detalyadong pinout data na magagamit para sa AD693AD.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
AD693AD ay nararapat para sa 6 aplikasyons: Industrial Pressure Transmitter, Resistance Temperature Detector Interface, Two-Wire Process Measurement Loop, Remote Temperature Monitoring, Industrial Current-Loop Signal Interface, Sensor Conditioner for Control Cabinets.
Industrial Pressure Transmitter
The AD693AD fits a remote pressure-transmitter design when the sensor produces a low-level voltage within the device's 30 mV or 60 mV precalibrated input spans. Its instrumentation-amplifier front end conditions the transducer output and converts it into a standard 4-20 mA or 0-20 mA loop current. Loop-powered operation lets the transmitter electronics draw power through the same two conductors that carry the measurement signal. The design must provide at least 12 V and no more than 36 V at the device under worst-case cable and load conditions, while the pressure sensor output must be matched to the selected AD693 input configuration.
Inirekomenda
Resistance Temperature Detector Interface
The AD693AD is identified as supporting a precalibrated 100 ohm RTD interface, making it applicable to temperature measurement loops where the RTD signal must be transmitted remotely. Its 30 mV and 60 mV input-span options provide predefined gain choices for compatible low-level temperature signals. The resulting standard 4-20 mA output can connect to a controller, indicator, or data-acquisition system over a two-wire loop. Before finalizing the circuit, verify the RTD measurement range, excitation requirements, lead resistance, and calibration method against the Analog Devices AD693 datasheet.
Inirekomenda
Two-Wire Process Measurement Loop
The AD693AD is well suited to process-measurement systems that combine a low-level transducer, remote electronics, and a standardized current output in one two-wire connection. Its monolithic design integrates the instrumentation-amplifier front end, voltage reference, and auxiliary amplifier, reducing the number of separate signal-conditioning blocks. Loop power supplies the circuit through the same conductors used for the 4-20 mA measurement signal. The engineering task is to confirm that the transducer's full-scale output fits a precalibrated input span and that the worst-case loop voltage remains inside the 12 V to 36 V operating range.
Inirekomenda
Remote Temperature Monitoring
For remote temperature monitoring, the AD693AD can create a standardized current-loop signal from a compatible 100 ohm RTD or other low-level temperature sensor. Its stated 200 uV offset voltage, selectable 30 mV and 60 mV precalibrated spans, and 4-20 mA unipolar output support sensitive measurement-interface designs. The loop-powered arrangement is especially useful where running separate power and signal cables would be inconvenient. Field performance still depends on the selected sensor, input configuration, calibration range, cable resistance, and receiver instrumentation, all of which should be evaluated as part of the complete transmitter design.
Inirekomenda
Industrial Current-Loop Signal Interface
The AD693AD provides a dedicated interface between a low-level sensor output and a two-wire industrial current loop. It can produce a precalibrated 4-20 mA unipolar signal, a 0-20 mA unipolar signal, or an 8 mA bipolar signal, allowing compatibility with different process-input receivers. Because the device includes a 5-amplifier instrumentation front end, a voltage reference, and an auxiliary amplifier, the transmitter can be consolidated into a focused signal-conditioning circuit. Select the output configuration, external gain network, and loop-supply limits directly from the manufacturer documentation rather than inferring them from the generic current-loop function.
Inirekomenda
Sensor Conditioner for Control Cabinets
The AD693AD can serve as the sensing element of a compact process-control transmitter mounted near a remote transducer. Its loop-powered architecture avoids a separate field-side power connection, while the integrated reference and auxiliary amplifier support the signal-conditioning function required for a stable current output. A 20-lead ceramic DIP package is appropriate for through-hole assembly and serviceable industrial electronics. Designers should still account for the 12 V minimum loop voltage, verify the transducer's output span, and use the AD693 pin and calibration information to avoid configuration errors during installation.
Inirekomenda
Impormasyon ng Talumpati sa Engineering for AD693AD — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto |
|---|---|
| Product Type | Monolithic loop-powered 4-20 mA sensor signal conditioner |
| Brand | Analog Devices |
| Package | 20-lead ceramic DIP |
| Supply Voltage Range | 12 V to 36 V |
| Precalibrated Input Spans | 30 mV and 60 mV |
| Offset Voltage | 200 uV |
| Output Configurations | 4-20 mA unipolar, 0-20 mA unipolar, and 8 mA bipolar |
| Front-End Architecture | 5-amplifier instrumentation-amplifier front end |
Pangunahing mga Pagkakaiba
- Combines signal conditioning and loop-current output in one monolithic IC (kumpara saNo verified drop-in alternative was identified)
- Provides multiple precalibrated low-level input choices (kumpara saNo verified drop-in alternative was identified)
- Supports field-powered remote instrumentation (kumpara saNo verified drop-in alternative was identified)
Talaan ng Disenyo
Design the field-side power budget around the specified 12 V to 36 V loop-supply range. Confirm the minimum voltage at the AD693AD under the maximum specified cable resistance and receiver burden rather than only at the power source. Use the manufacturer datasheet to determine startup, quiescent-current, and loop-current requirements; these values were not established for this record and should not be inferred from the supply-range description.
Follow the AD693 pin description and application diagrams when assigning the 20-lead ceramic DIP footprint. Keep sensitive input and feedback-network connections away from noisy current-loop and power paths, and use the manufacturer reference layout for grounding and decoupling. Because a complete public pin list was not established, cross-check every connection against the official datasheet before fabrication rather than relying only on the physical 20-pin package dimensions.
Match the transducer's full-scale millivolt output to the selected 30 mV or 60 mV input span and verify whether the receiver expects 4-20 mA unipolar, 0-20 mA unipolar, or 8 mA bipolar current. Do not assume that every current-loop transmitter with a similar function has identical calibration, compensation, or pin behavior. Validate the complete span and zero adjustment using the calibration procedure in the Analog Devices AD693 datasheet.
Impormasyon ng Pagsunod sa Kautusan
Compliance attributes were not identified in the available manufacturer and distributor product information.
