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Features
- 256-Position
- Replaces 1,2 or 4 Potentiometers
- 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ
- Power Shutdown - Less than 5 µA
- 3-Wire SPI-Compatible Serial
- Data Input
- 10 MHz Update Data Loading Rate
- 2.7 V to 5.5 V Single-Supply Operation
- Midscale Preset
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The AD8400/AD8402/AD8403 provide a single, dual or quad channel, 256 position digitally controlled variable resistor (VR) device. These devices perform the same electronic adjustment function as a potentiometer or variable resistor. The AD8400 contains a single variable resistor in the compact SO-8 package. The AD8402 contains two independent variable resistors in saving SO-14 surface mount package. The AD8403 contains four independent variable resistors in 24-lead PDIP, SOIC and TSSOP packages. Each part contains a fixed resistor with a wiper contact that taps the fixed resistor value at a point determined by a digital code loaded into the controlling serial input register. The resistance between the wiper and either endpoint of the fixed resistor varies linearly with respect to the digital code transferred into the VR latch. Each variable resistor offers a completely programmable value of resistance, between the A terminal and the wiper or the B terminal and the wiper. The fixed A to B terminal resistance of 1 kOhm, 10 kOhm, 50 kOhm or 100 kOhm has a ±1% channel-to-channel matching tolerance with a nominal temperature coefficient of 500 ppm/°C. A unique switching circuit minimizes the high glitch inherent in traditional switched resistor designs avoiding any make-before-break or break-before-make operation.
Each VR has its own VR latch that holds its programmed resistance value. These VR latches are updated from an SPI compatible serial-to-parallel shift register that is loaded from a standard 3-wire serial-input digital interface. Ten data bits make up the data word clocked into the serial input register. The data word is decoded where the first two bits determine the address of the VR latch to be loaded, the last eight bits are data. A serial data output pin at the opposite end of the serial register allows simple daisy-chaining in multiple VR applications without additional external decoding logic.
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AD8402
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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
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PCN
Mar 29, 2021
- 21_0033
Assembly Site Transfer for 14/16L 300_MIL PDIP to Cirtek
AD8402ANZ10
PRODUCTION
Jul 19, 2010
- 10_0179
AD8400, AD8402, AD8403 datasheet correction
AD8402ANZ10
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AD8402ARUZ1-REEL
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Aug 19, 2009
- 07_0024
Package Material Changes for SOT23, MiniSO, MQFP, PDIP, PLCC, SOIC (narrow and wide body), SSOP, TSSOP and TSSOP exposed pad
AD8402ANZ10
PRODUCTION
Apr 5, 2021
- 21_0035
Amkor Philippines as an Alternate Site for TSSOP_4.4
AD8402ARUZ1
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Feb 11, 2011
- 10_0005
Halogen Free Material Change for TSSOP Products Assembled at Amkor
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Mar 25, 2021
- 21_0080
Amkor Philippines as an Alternate Site for SOICN
AD8402ARZ1
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AD8402ARZ10-REEL
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Oct 5, 2010
- 10_0146
Halogen Free Material Change for 14/16L SOIC_N Products
AD8402ARZ1
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AD8402ARZ1-REEL
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AD8402ARZ10-REEL
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Mar 29, 2021
- 21_0033
Assembly Site Transfer for 14/16L 300_MIL PDIP to Cirtek
AD8402ANZ10
PRODUCTION
Jul 19, 2010
- 10_0179
AD8400, AD8402, AD8403 datasheet correction
AD8402ANZ10
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PRODUCTION
Aug 19, 2009
- 07_0024
Package Material Changes for SOT23, MiniSO, MQFP, PDIP, PLCC, SOIC (narrow and wide body), SSOP, TSSOP and TSSOP exposed pad
AD8402ANZ10
PRODUCTION
Apr 5, 2021
- 21_0035
Amkor Philippines as an Alternate Site for TSSOP_4.4
AD8402ARUZ1
PRODUCTION
AD8402ARUZ1-REEL
PRODUCTION
AD8402ARUZ10
PRODUCTION
AD8402ARUZ10-REEL
PRODUCTION
AD8402ARUZ100
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AD8402ARUZ100-REEL
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AD8402ARUZ50
PRODUCTION
Feb 11, 2011
- 10_0005
Halogen Free Material Change for TSSOP Products Assembled at Amkor
AD8402ARUZ1
PRODUCTION
AD8402ARUZ1-REEL
PRODUCTION
AD8402ARUZ10
PRODUCTION
AD8402ARUZ10-REEL
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AD8402ARUZ100
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AD8402ARUZ100-REEL
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Mar 25, 2021
- 21_0080
Amkor Philippines as an Alternate Site for SOICN
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AD8402ARZ1-REEL
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PRODUCTION
AD8402ARZ100-REEL
PRODUCTION
AD8402ARZ50
PRODUCTION
AD8402ARZ50-REEL
PRODUCTION
Oct 5, 2010
- 10_0146
Halogen Free Material Change for 14/16L SOIC_N Products
AD8402ARZ1
PRODUCTION
AD8402ARZ1-REEL
PRODUCTION
AD8402ARZ10
PRODUCTION
AD8402ARZ10-REEL
PRODUCTION
AD8402ARZ100
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AD8402ARZ100-REEL
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AD8402ARZ50-REEL
PRODUCTION
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EVAL-AD8403
AD8403 Evaluation Board
Product Detail
The AD8403 supports a single-supply 2.7 V to 5.5 V operation, making the device suited for battery-powered applications and many other applications, offering a ±1% channel-to-channel matching tolerance.
In addition, the AD8403 uses a versatile SPI serial interface, allowing speeds of up to 50 MHz.
The EVAL-AD8403SDZ can operate in single-supply mode and incorporates an internal power supply from the USB.
Complete specifications for the AD8403 part can be found in the AD8403 data sheet.
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