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Instrumentation Amplifiers 4-20MA SENSOR/TRANSMITTER
CDIP-20Hersteller:
Herstellerteil #:
AD693AD
Datenblatt:
Programmable:
Not Verified
Type:
Signal Conditioner
Input Type:
Voltage
Output Type:
Voltage
EDA/CAD Modelle:
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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.
Category | Integrated Circuits (ICs)InterfaceSensor and Detector Interfaces | Series | - |
Programmable | Not Verified | Type | Signal Conditioner |
Input Type | Voltage | Output Type | Voltage |
Current - Supply | 20 mA | Operating Temperature | -40°C ~ 85°C |
Mounting Type | Through Hole | Base Product Number | AD693 |
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12 Std.
Came with pin header not soldered to the board, but it is even better for safety during transportation. High quality of assembly, but unfortunately had no chance to check its operation.