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Updated at 02/11/2025 10:30:15(UTC+8)
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Description
- Product Details
- The AD693 is a monolithic signal conditioning circuit which accepts low-level inputs from a variety of transducers to control a standard 4-20 mA, two-wire current loop. An on-chip voltage reference and auxiliary amplifier are provided for transducer excitation; up to 3.5 mA of excitation current is available when the device is operated in the loop-powered mode. Alternatively, the device may be locally powered for three-wire applications when 0-20 mA operation is desired.
- Precalibrated 30 mV and 60 mV input spans may be set by simple pin strapping. Other spans from 1 mV to 100 mV may be realized with the addition of external resistors. The auxiliary amplifier may be used in combination with on-chip voltages to provide six precalibrated ranges for 100 (ohm) RTDs. Output span and zero are also determined by pin strapping to obtain the standard ranges: 4-20mA, 12 ± 8 mA and 0-20 mA.
- Active laser trimming of the AD693"s thin-film resistors result in high levels of accuracy without the need for additional adjustments and calibration. Total unadjusted error is tested on every device to be less than 0.5% of full scale at +25°C, and less than 0.75% over the industrial temperature range. Residual nonlinearity is under 0.05%. The AD693 also allows for the use of an external pass transistor to further reduce errors caused by self-heating.
- For transmission of low-level signals from RTDs, bridges and pressure transducers, the AD693 offers a cost-effective signal conditioning solution. It is recommended as a replacement for discrete designs in a variety of applications in process control, factory automation and system monitoring.
- The AD693 is packaged in a 20-pin ceramic side-brazed DIP, 20-pin Cerdip, and 20-pin LCCC and is specified over the -40°C to +85°C industrial temperature range.
- ### Features and Benefits
- Instrumentation Amplifier Front End
- Loop-Powered Operation
- Independently Adjustable Output Span and Zero
- Precalibrated Output Spans:
- 4-12 mA Unipolar
- 0-20 mA Unipolar
- 12 ± 8mA Bipolar
- Precalibrated 20 mV or 60mV Input Spans
- Precalibrated 100 O RTD Interface
- 6.2 V Reference with Up to 3.5 mA of Current Available
- Uncommitted Auxiliary Amp for Extra Flexibility
- Optional External Pass Transistor to Reduce Self-Heating Errors
AD693AD Specifications
| Attribute | Attribute Value |
|---|---|
| Datasheet | Datasheet |
| 3D Model | 3D Model |
| Mounting Style | Through Hole |
| Number of Pins | 20 Pin |
| Case/Package | CDIP-20 |
| Supply Voltage (DC) | 36.0V (max) |
| Supply Current | 20 mA |
| Number of Channels | 1 Channel |
| Common Mode Rejection Ratio | 100 dB |
| Quiescent Current | 700 µA |
| Input Offset Voltage | 0.2 mV |
| Input Bias Current | 20 nA |
| Operating Temperature (Max) | 85 ℃ |
| Operating Temperature (Min) | -40 ℃ |
| Supply Voltage | 12V ~ 36V |
| Supply Voltage (Max) | 36 V |
| Supply Voltage (Min) | 12 V |
| Input Voltage | 12V ~ 36V |
| Show | |
| Size-Length | 26.92 mm |
| Size-Width | 7.87 mm |
| Size-Height | 3.56 mm |
| Operating Temperature | -40℃ ~ 85℃ |
| Product Lifecycle Status | Active |
| Packaging | Tube |
| RoHS | Non-Compliant |
| Lead-Free Status | Contains Lead |
| ECCN Code | EAR99 |
Order guide
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- Delivery date: usually 2 to 7 working days.
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- - Carefully inspected and packed by ManyChip warehouse - Vacuum packaging - Anti-static packaging - Shockproof foam
- The terms here are for reference only, the actual terms are subject to the sales quotation. - Please confirm product specifications when ordering. - MOQ refers to the minimum order quantity required to purchase each part. - If you have special ordering instructions, please indicate them on the ordering page. - Inspection (PSI) will be performed prior to shipment.
- - Income Quality Control (IQC), 1000+ qualified dealers. - Chips are tested by authoritative organizations to ensure the quality, authenticity and safety of your device. - Decapsulation control - X-ray control - XRF inspection - Electrical testing - Surface testing -Digital components warehouse, covering an area of 800 square meters, with constant temperature and humidity
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