ADT7518ARQ-REEL Analog Devices Inc, ADT7518ARQ-REEL Datasheet
ADT7518ARQ-REEL
Specifications of ADT7518ARQ-REEL
Related parts for ADT7518ARQ-REEL
ADT7518ARQ-REEL Summary of contents
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FEATURES Four 8-bit DACs Buffered voltage output Guaranteed monotonic by design over all codes 10-bit temperature-to-digital converter 10-bit 4-channel ADC DC input bandwidth Input range 2.25 V Temperature range: –40°C to +120°C Temperature sensor accuracy of typ: ...
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ADT7518 TABLE OF CONTENTS Specifications..................................................................................... 3 DAC AC Characteristics.............................................................. 6 Functional Block Diagram .............................................................. 7 Absolute Maximum Ratings............................................................ 8 ESD Caution.................................................................................. 8 Pin Configuration and Functional Descriptions.......................... 9 Terminology .................................................................................... 10 Typical Performance Characteristics ........................................... 12 Theory of Operation ...................................................................... ...
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SPECIFICATIONS Table 1. Temperature range is as follows: A version: –40°C to +120°C. V otherwise noted. 1 Parameter 2,3 DAC DC PERFORMANCE Resolution Relative Accuracy Differential Nonlinearity Offset Error Gain Error Lower Deadband Upper Deadband 4 Offset Error Drift 4 ...
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ADT7518 1 Parameter Scale Factor CONVERSION TIMES Slow ADC V /AIN DD Internal Temperature External Temperature Fast ADC V /AIN DD Internal Temperature External Temperature 5 ROUND ROBIN UPDATE RATE Slow ADC @ 25°C Averaging On Averaging Off Averaging On ...
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Parameter DIGITAL OUTPUT Digital High Voltage Output Low Voltage Output High Current Output Capacitance, C OUT INT/INT Output Saturation Voltage TIMING CHARACTERISTICS Serial Clock Period Data ...
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ADT7518 1 DAC AC CHARACTERISTICS Table 2 5 4.7 kΩ to GND otherwise noted. 2 Parameter Output Voltage Settling Time ADT7518 Slew Rate Major-Code Change Glitch Energy Digital Feedthrough ...
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FUNCTIONAL BLOCK DIAGRAM INTERNAL TEMPERATURE VALUE REGISTER ON-CHIP TEMPERATURE SENSOR EXTERNAL TEMPERATURE VALUE REGISTER D+/AIN1 7 D–/AIN2 8 A-TO-D ANALOG CONVERTER MUX LDAC/AIN3 9 AIN4 VALUE REGISTER AIN1 VALUE REGISTER V DD SENSOR AIN2 VALUE REGISTER AIN3 ...
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ADT7518 ABSOLUTE MAXIMUM RATINGS Table 3. Parameter V to GND DD Analog Input Voltage to GND Digital Input Voltage to GND Digital Output Voltage to GND Reference Input Voltage to GND Operating Temperature Range Storage Temperature Range Junction Temperature 16-Lead ...
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PIN CONFIGURATION AND FUNCTIONAL DESCRIPTIONS Table 5. Pin Function Descriptions Pin No. Mnemonic Description Buffered Analog Output Voltage from DAC B. The output amplifier has rail-to-rail operation. OUT Buffered Analog Output Voltage from DAC ...
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ADT7518 TERMINOLOGY Relative Accuracy Relative accuracy or integral nonlinearity (INL measure of the maximum deviation, in LSBs, from a straight line passing through the endpoints of the transfer function. Typical INL versus code plots can be seen in ...
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DAC-to-DAC Crosstalk This is the glitch impulse transferred to the output of one DAC due to a digital code change and subsequent output change of another DAC. This includes both digital and analog crosstalk measured by loading one ...
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ADT7518 TYPICAL PERFORMANCE CHARACTERISTICS 0.20 0.15 0.10 0.05 0 –0.05 –0.10 –0.15 –0. 100 150 DAC CODE Figure 10. ADT7518 Typical DAC INL Plot 0.10 0.08 0.06 0.04 0.02 0 –0.02 –0.04 –0.06 –0.08 –0. 100 ...
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SOURCE CURRENT 2.490 2.485 SINK CURRENT 2.480 2.475 REF DAC OUTPUT 2.470 LOADED TO MIDSCALE 2.465 CURRENT (mA) Figure 16. DAC V Source and Sink ...
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ADT7518 0.4700 0.4695 0.4690 0.4685 0.4680 0.4675 0.4670 0.4665 0.4660 0.4655 0.4650 TIME (µs) Figure 22. ADT7518 DAC Major Code Transition Glitch Energy; 0...11 to 100...00 0.4730 0.4725 0.4720 0.4715 0.4710 0.4705 0.4700 0.4695 0.4690 0.4685 0 ...
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EXTERNAL TEMPERATURE @ 5V INTERNAL TEMPERATURE @ 3.3V 1.0 0.5 0 –0.5 EXTERNAL TEMPERATURE @ 3.3V INTERNAL TEMPERATURE @ 5V –1.0 – TEMPERATURE ( ° C) Figure 28. Internal Temperature Error @ 3.3 V and 5 ...
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ADT7518 70 V DIFFERENTIAL-MODE 60 VOLTAGE = 100mV –10 1 100 200 300 NOISE FREQUENCY (MHz) Figure 34. External Temperature Error vs. Differential-Mode Noise Frequency 0 3.3V DD 0.4 0.2 0 –0.2 ...
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THEORY OF OPERATION Directly after the power-up calibration routine, the ADT7518 goes into idle mode. In this mode, the device is not performing any measurements and is fully powered up. All four DAC outputs are begin ...
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ADT7518 The ADT7518 powers up with averaging on. This means every channel is measured 16 times and internally averaged to reduce noise. The conversion time can also be sped up by turning off the averaging. This is done by setting ...
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DAC Reference Inputs There is an input reference pin for the DACs. This reference input is buffered (see Figure 40). The advantage with the buffered input is the high impedance it presents to the voltage source driving it. The user ...
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ADT7518 Table 7. Thermal Voltage Output ( O/P Voltage (V) Default °C Max °C 0 –40 –128 0.25 –26 –114 0.5 +12 –100 0.75 +3 –85 1 +17 –71 1.12 +23 –65 1.47 +43 –45 1.5 ...
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The ADC resolution is 10 bits and is mostly suitable for dc input signals. Bits C1:2 of the Control Configuration 1 register (Address 18h) are used to set up Pins 7 and 8 as AIN1 and AIN2. Figure 44 shows ...
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ADT7518 S/W RESET WATCHDOG LIMIT COMPARISONS READ RESET AIN Interrupts The measured results from the AIN inputs are compared with the AIN V (greater than comparison) and V HIGH equal to comparison) limits. An interrupt occurs if the AIN inputs ...
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The second method is applicable when the part is in round robin measurement mode. The part measures both the internal and external temperature sensors as it cycles through all pos- sible measurement channels. The two temperature channels are measured each ...
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ADT7518 2 register and set (if not done so already), then write all 0s to Bits C0:C2. All subsequent conversions will be done on the V channel only. To change the channel selection to the inter- DD ...
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Place 0.1 µF bypass and 2,200 pF input filter capacitors close to the ADT7518 the distance to the remote sensor is more than 8 inches, the use of twisted-pair cable is recommended. This will work up to ...
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ADT7518 SECOND READ MSB COMMAND REGISTER UNLOCK ASSOCIATED MSB REGISTERS Figure 52. Phase 2 of 10-Bit Read If an MSB register is read first, its corresponding LSB register is not locked, leaving the user with the option of just reading ...
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Table 13. Interrupt Status 2 Register N/A N/A N/A 0* N/A * Default settings at power-up. Table 14. Bit Function D4 1 when V value is greater than its corresponding V DD limit. 1 when ...
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ADT7518 Table 23. AIN3 MSBs MSB Default settings at power-up AIN4 Register MSBs (Read) [Address = 0Bh] This 8-bit read register contains the eight MSBs ...
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Table 30. Bit Function C0 This bit enables/disables conversions in round robin and single-channel mode. ADT7518 powers up in round robin mode but monitoring is not initiated until this bit is set. The default = Stop monitoring. ...
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ADT7518 DAC Configuration Register (Read/Write) [Address = 1Bh] This configuration register is an 8-bit read/write register that is used to control the output ranges of all four DACs and also to control the loading of the DAC registers if the ...
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Interrupt Mask 2 Register (Read/Write) [Address = 1Eh] This mask register is an 8-bit read/write register that can be used to mask any interrupts that can cause the INT/ INT pin to go active. Table 41. Interrupt Mask 2 D7 ...
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ADT7518 V V Limit Register (Read/Write) [Address = 24h] DD LOW This limit register is an 8-bit read/write register that stores the V lower limit, which will cause an interrupt and activate the DD INT/ INT output (if enabled). For ...
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AIN2 V Limit Register (Read/Write) [Address = 2Ch] LOW This limit register is an 8-bit read/write register that stores the AIN2 input lower limit, which will cause an interrupt and acti- vate the INT/ INT output (if enabled). For this ...
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ADT7518 CS A (START HIGH (START LOW) To select and lock the interface into the SPI mode, a number of pulses must be sent down the CS line (Pin 4). The following section describes how this is done. ...
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The serial bus protocol operates as follows: 1. The master initiates a data transfer by establishing a start condition, defined as a high to low transition on the serial data line SDA while the serial clock line SCL remains high. ...
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ADT7518 1 SCL SDA START BY MASTER FRAME 1 SERIAL BUS ADDRESS BYTE 2 Figure 56. I C—Writing to the Address Pointer Register to Select a Register for a Subsequent Read Operation 1 SCL 1 0 ...
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CS 1 SCLK DIN START WRITE COMMAND CS (CONTINUED) SCLK (CONTINUED) DIN (CONTINUED) Figure 59. SPI—Writing to the Address Pointer Register Followed by a Single Byte of Data to the Selected Register CS 1 SCLK ...
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ADT7518 CS 1 SCLK DIN DOUT START READ COMMAND Figure 62. SPI—Reading Two Bytes of Data From Two Sequential Registers CS SPI READ OPERATION SMBus/SPI INT/INT The ADT7518 INT/ INT output is an interrupt ...
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The INT/ INT output can operate as an SMBALERT function. Slave devices on the SMBus cannot normally signal to the master that they want to talk, but the SMBALERT function allows them to do so. SMBALERT is used in conjunction ...
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... ADT7518 OUTLINE DIMENSIONS 0.010 0.004 COPLANARITY ORDERING GUIDE Model Temperature Range ADT7518ARQ –40°C to +120°C ADT7518ARQ-REEL –40°C to +120°C ADT7518ARQ-REEL7 –40°C to +120°C ADT7518ARQZ 1 –40°C to +120°C 1 ADT7518ARQZ-REEL –40°C to +120°C 1 ADT7518ARQZ-REEL7 –40°C to +120° Pb-free part ...