AD8290 Analog Devices, AD8290 Datasheet
AD8290
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AD8290 Summary of contents
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... The AD8290 is available in a lead free 3.0 mm × 3.0 mm × 0.55 mm package and is operational over the industrial temperature range of −40°C to +85°C. FUNCTIONAL BLOCK DIAGRAM ...
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... AD8290 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 5 Thermal Resistance ...................................................................... 5 ESD Caution.................................................................................. 5 Pin Configuration and Function Descriptions............................. 6 Typical Performance Characteristics ............................................. 7 Theory of Operation ...................................................................... 14 Amplifier...................................................................................... 14 High Power Supply Rejection (PSR) and Common-Mode Rejection (CMR) ........................................................................ 14 1/f Noise Correction .................................................................. 14 REVISION HISTORY 2/08— ...
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... T < +85°C −250 A 692 −2 < 2 − 0 > 2.9 V 2.4 CC GND Rev Page AD8290 = 3 kΩ, common-mode input = 0.6 V, unless SET Typ Max 120 0.75 900 935 ±50 +300 120 ±100 +1000 ±200 +2000 0.25 50 ±0.5 +1.0 ±0.0075 ± ...
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... AD8290 Parameter POWER SUPPLY Operating Range Quiescent Current Shutdown Current TEMPERATURE RANGE For Operational Performance Test Conditions Min 2.6 −40 Rev Page Typ Max 5.5 1.2 + 2× 1.8 + 2× excitation current excitation current 0.5 10 +85 Unit V mA μA °C ...
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... JA 300°C soldered in a circuit board for surface-mount packages. Table 3. Package Type 16-Lead LFCSP (0.55 mm) ESD CAUTION Rev Page AD8290 θ θ Unit JA JC 42.5 7.7 °C/W ...
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... VINP Positive Input Terminal Tie to Ground 17/Pad NC Pad should be floating and not tied to any potential. 1 During dual-supply operation, ground becomes the negative power supply voltage AD8290 VCC 2 11 TOP ENBL 3 VIEW 10 (Not to Scale) VOUT CONNECT Figure 2. Pin Configuration or Pin 16 ...
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... EXCITATION CURRENT (mA) at 2.6 V Supply SET 0.2988 0.2994 0.3000 0.3006 0.2991 0.2997 0.3003 0.3009 EXCITATION CURRENT (mA) at 3.6 V Supply SET 0.2988 0.2994 0.3000 0.3006 0.2991 0.2997 0.3003 0.3009 EXCITATION CURRENT (mA) at 5.0 V Supply SET AD8290 0.3012 0.3012 0.3012 ...
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... AD8290 1.296 1.297 1.298 1.299 1.300 1.301 1.302 1.303 1.304 1.305 EXCITATION CURRENT (mA) Figure 9. Output Excitation Current for 692 Ω 1.296 1.297 1.298 1.299 1.300 1.301 1.302 1.303 1.304 1.305 EXCITATION CURRENT (mA) Figure 10. Output Excitation Current for 692 Ω R ...
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... Figure 19. Output Offset Voltage Drift from −40°C to +85°C at 3.6 V Supply –35 0.0150 0.0135 Figure 20. Output Offset Voltage Drift from −40°C to +85°C at 5.0 V Supply Rev Page AD8290 – 105 125 DRIFT (µV/°C) –15 5 ...
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... AD8290 DRIFT (ppm/°C) Figure 21. Excitation Current Drift from −40°C to +85°C at 2.6 V Supply kΩ SET DRIFT (ppm/°C) Figure 22. Excitation Current Drift from −40°C to +85°C at 3.6 V Supply kΩ ...
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... Figure 31. Low Excitation Current vs. Power Supply 1.310 1.308 1.306 1.304 1.302 1.300 1.298 1.296 1.294 1.292 1.290 2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.25 4.50 4.75 5.00 5.25 5.50 Figure 32. High Excitation Current vs. Power Supply Rev Page AD8290 100 1k 10k FREQUENCY (Hz) POWER SUPPLY (V) POWER SUPPLY (V) ...
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... AD8290 310 305 300 295 2.6V SUPPLY 290 285 280 0 0.5 1.0 1.5 2.0 2.5 3.0 PIN VOLTAGE (V) Figure 33. Low Excitation Current vs. Excitation Current Pin Voltage 1.32 1.31 1.30 1.29 2.6V SUPPLY 1.28 1.27 1.26 0 0.5 1.0 1.5 2.0 2.5 3.0 PIN VOLTAGE (V) Figure 34. High Excitation Current vs. Excitation Current Pin Voltage 0.905 0.904 0.903 0.902 0.901 0.900 0.899 5.0V SUPPLY 0.898 0.897 0.896 0.895 – ...
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... Rev Page 0 100 FREQUENCY (Hz) Figure 41. Input-Referred Noise vs. Frequency ENBL PIN VOLTAGE (0V TO 5V) OUTPUT OFFSET VOLTAGE – TIME (ms) Figure 42. ENBL Pin Voltage for 5.0 V Supply vs. Output Offset Voltage Start-Up Time AD8290 1000 20 ...
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... Flicker noise appears as a slowly varying offset error that is reduced by the autocorrection topology of the AD8290, allowing the AD8290 to have lower noise near dc than standard low noise instrumentation amplifiers. C FILTER ...
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... CURRENT SOURCE The AD8290 generates an excitation current that is programmable with an external resistor, R Figure 44. A1 and M1 are configured to produce 0.9 V across R , which is based on an internal 0.9 V reference and creates a SET current equal to 0.9 V/R internal to the AD8290. This current SET is passed to a precision current mirror and a replica of the current is sourced from the IOUT pin ...
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... RC filter of 235 Hz is required on the output, which is also recommended when driving an ADC requiring an antialiasing filter. Internal to the AD8290 is a series 10 kΩ resistor at the output (R3 in Figure 43) and using an external 68 nF capacitor to ground produces an RC filter of 235 Hz on the output as well. ...
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... DUAL-SUPPLY OPERATION The AD8290 can be configured to operate in dual-supply mode. An example of such a circuit is shown in Figure 46, where the AD8290 is powered by ±1.8 V supplies. When operating with dual supplies, pins that are normally referenced to ground in the single-supply mode, now need to be referenced to the negative supply. These pins include the following: Pin 1, Pin 7, Pin 8, Pin 9, Pin 10, Pin 12, and Pin 16 ...
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... Table 6. Typical AD8290 Conditions for Pressure Sensor Circuit AD8290 V (V) Excitation Current (μA) CC 3.3 (2.6 to 5.5) 333.3 (300 to 1300) Table 7. Pressure Sensor Circuit Calculations Compared to AD8290 Minimum/Maximum Specifications Specification Supply Current Current Setting Resistor (R ) SET Minimum Equivalent Resistance to IOUT Pin Maximum Equivalent Resistance to IOUT Pin ...
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... Output Voltage Maximum ADC/MICROCONTROLLER In both of the previous applications, an ADC or a microcontroller can be used to follow the AD8290 to convert the output analog signal to digital. For example, if there are multiple sensors in the system, the six channel ADuC814ARU microcontoller is an excellent candidate to interface with multiple AD8290s. ...
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... Temperature Range 1 AD8290ACPZ-R2 −40°C to +85°C 1 AD8290ACPZ-R7 −40°C to +85°C 1 AD8290ACPZ-RL −40°C to +85° RoHS Compliant Part. ©2007–2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 3.00 BSC SQ 13 ...