AD680 Analog Devices, AD680 Datasheet
AD680
Available stocks
Related parts for AD680
AD680 Summary of contents
Page 1
... The AD680AN and AD680AR have a maximum variation of 6.25 mV between −40°C and +85°C. 3. Low Noise. The AD680 noise is low, typically 8 μV p-p from 0 Hz. Spectral density is also low, typically 250 nV/√Hz. 4. Temperature Transducer. The temperature output pin on the 8-lead package versions enables the AD680 to be configured as a temperature transducer ...
Page 2
... AD680 TABLE OF CONTENTS Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 4 Output Protection ........................................................................ 4 ESD Caution.................................................................................. 4 Pin Configuration and Connection Diagram............................... 5 Theory of Operation ........................................................................ 6 Applying the AD680 .................................................................... 6 Noise Performance ....................................................................... 6 Turn-on Time................................................................................ 7 Dynamic Performance................................................................. 7 REVISION HISTORY 8/05—Rev Rev. H Changes to Ordering Guide ..........................................................11 12/04—Rev Rev. G Updated Format ................................................................. Universal Changes to Ordering Guide ..........................................................11 5/04— ...
Page 3
... AD680 ...
Page 4
... AD680 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter V to Ground IN Power Dissipation (25°C) Storage Temperature Lead Temperature (Soldering, 10 sec) Package Thermal Resistance θ (All Packages) JA ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges ...
Page 5
... TOP VIEW OUT (Not to Scale) GND CONNECT * TP DENOTES FACTORY TEST POINT. NO CONNECTIONS SHOULD BE MADE TO THESE PINS. Figure 3. 8-Lead PDIP and 8-Lead SOIC Pin Configuration AD680 BOTTOM VIEW (Not to Scale GND IN OUT Figure 4. Connection Diagram Rev Page AD680 ...
Page 6
... To operate the AD680, the +V pin must be bypassed to the IN GND pin with a 0.1 μF capacitor tied as close to the AD680 as possible. Although the ground current for the AD680 is small, typically 195 μA, a direct connection should be made between the AD680 GND pin and the system ground plane. ...
Page 7
... Two components normally associated with this are the time for the active circuits to settle, and the time for the thermal gradients on the chip to stabilize. The turn-on settling time of the AD680 is about 20 μs to within 0.025% of its final value, as shown in Figure 8. 5V ...
Page 8
... Figure 15 shows a typical output voltage drift for the AD680AN/ AD680AR and illustrates the test methodology. The box in Figure 15 is bounded on the left and right sides by the operat- 100μs ing temperature extremes, and on the top and bottom by the maximum and minimum output voltages measured over the operating temperature range ...
Page 9
... AD680. This circuit operates from supply. The temperature-dependent voltage from the TEMP pin of the AD680 is amplified by a factor provide wider full-scale range and more current sourcing capability. An exact gain of 5 can be achieved by adjusting the trim potentiometer until the output varies by 10 mV/° ...
Page 10
... AD680 4.5 V REFERENCE FROM SUPPLY The AD680 can be used to provide a low power, 4.5 V reference, as shown in Figure 19. In addition to the AD680, the circuit uses a low power op amp and a transistor in a feedback con- figuration that provides a regulated 4.5 V output for a power supply voltage as low as 4.7 V. The high quality tantalum 10 μF capacitor (C1) in parallel with the ceramic 0.1 μ ...
Page 11
... MIN 0.115 (2.92) SEATING PLANE 0.080 (2.03) COMPLIANT TO JEDEC STANDARDS TO-226AA Figure 23. 3-Pin Plastic Header-Style Package [TO-92] (T-3) Dimensions shown in inches and (millimeters) Rev Page AD680 0.365 (9.27) 0.355 (9.02) 5 0.280 (7.11) 0.250 (6.35) 0.240 (6.10) 4 0.325 (8.26) 0.310 (7.87) 0.300 (7.62) BSC 0.060 (1.52) MAX 0.015 (0 ...
Page 12
... AD680ARZ-REEL7 1 2.5 5 AD680JR 2.5 10 AD680JR-REEL7 2 AD680JRZ 2 AD680JRZ-REEL7 2.5 10 AD680AN 2 AD680ANZ 2.5 5 AD680JN 2 AD680JNZ 2.5 10 AD680JT 2 AD680JTZ 2 Pb-free part. ©2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Temperature Coefficient Package (ppm/°C) ...