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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.

Part#	# Channels	# Positions	Memory Type	Interface	Resistor Values (kOhms)	Bipolar Voltage Range (V)	Voltage Range (V)	Supply Current (max)	Temp. Range -40 °C to..	Absolute Tempco (ppm/°C)	Price* (1000-4999)
ADN2860	3	512	Non-Volatile	I2C	25, 250	±2.75	-	10µA	85	15	$5.97
AD5228	1	32	Volatile	Pushbutton	10, 50, 100	-	+5.5	0.4µA	105	35	$0.34
AD5201	1	33	Volatile	SPI	10, 50	±3	+5.5	15µA	85	500	$0.50
AD5227	1	64	Volatile	Up/Down	10, 50, 100	-	+5.5	0.4µA	105	35	$0.36
AD5246	1	128	Volatile	I2C	5, 10, 50, 100	-	+5.5	3µA	125	35	$0.45
AD5247	1	128	Volatile	I2C	5, 10, 50, 100	-	+5.5	3µA	125	35	$0.45
AD5220	1	128	Volatile	Up/Down	10, 50, 100	-	+5.5	15µA	85	800	$0.90
AD7376	1	128	Volatile	SPI	10, 50, 100, 1M	±15	+28	10µA	85	35	$2.86
AD5160	1	256	Volatile	SPI	5, 10, 50, 100	-	+5.5	3µA	125	35	$0.64
AD5165	1	256	Volatile	SPI	100	-	+5.5	0.05µA	125	35	$0.58
AD5245	1	256	Volatile	I2C	5, 10, 50, 100	-	+5.5	3µA	125	35	$0.64
AD5161	1	256	Volatile	I2C, SPI	5, 10, 50, 100	-	+5.5	3µA	125	35	$0.65
AD5241	1	256	Volatile	I2C	10, 100, 1M	±3	+5.5	0.1µA	105	30	$0.93
AD5200	1	256	Volatile	SPI	10, 50	±3	+5.5	15µA	85	500	$0.89
AD8400	1	256	Volatile	SPI	1, 10, 50, 100	-	+5.5	0.01µA	125	500	$1.13
AD5260	1	256	Volatile	SPI	20, 50, 200	±5	+15	0.1µA	85	35	$1.80
AD5280	1	256	Volatile	I2C	20, 50, 200	±5	+15	0.1µA	85	35	$1.80
AD5290	1	256	Volatile	SPI	10, 50, 100	±15	+30	10µA	105	35	$1.97
AD5222	2	128	Volatile	Up/Down	10, 50, 100, 1M	±3	+5.5	15µA	85	35	$0.80
AD5243	2	256	Volatile	I2C	2.5, 10, 50, 100	-	+5.5	3.5µA	125	35	$1.00
AD5162	2	256	Volatile	SPI	2.5, 10, 50, 100	-	+5.5	3.5µA	125	35	$1.00
AD5248	2	256	Volatile	I2C	2.5, 10, 50, 100	-	+5.5	3.5µA	125	35	$1.00
AD5207	2	256	Volatile	SPI	10, 50, 100	±3	+5.5	40µA	125	500	$1.06
AD8402	2	256	Volatile	SPI	1, 10, 50, 100	-	+5.5	0.01µA	125	500	$1.68
AD5242	2	256	Volatile	I2C	10, 100, 1M	±3	+5.5	0.1µA	105	30	$1.27
AD5262	2	256	Volatile	SPI	20, 50, 200	±5	+15	0.1µA	85	35	$1.97
AD5282	2	256	Volatile	I2C	20, 50, 200	±5	+15	0.1µA	85	35	$1.97
AD5203	4	64	Volatile	SPI	10, 100	-	+5.5	0.01µA	85	700	$1.47
AD5204	4	256	Volatile	SPI	10, 50, 100	±3	+5.5	12µA	85	700	$1.52
AD8403	4	256	Volatile	SPI	1, 10, 50, 100	-	+5.5	0.01µA	125	500	$2.79
AD5263	4	256	Volatile	I2C, SPI	20, 50, 200	±5	+15	1µA	125	30	$2.58
AD5206	6	256	Volatile	SPI	10, 50, 100	±3	+5.5	12µA	85	700	$1.94
AD5273	1	64	One Time Programmable	I2C	1, 10, 50, 100	-	+5.5	0.1µA	105	300	$0.69
AD5171	1	64	One Time Programmable	I2C	5, 10, 50, 100	-	+5.5	4µA	125	35	$0.72
AD5170	1	256	One Time Programmable	I2C	2.5, 10, 50, 100	-	+5.5	3.5µA	125	35	$1.00
AD5172	2	256	One Time Programmable	I2C	2.5, 10, 50, 100	-	+5.5	3.5µA	125	35	$1.32
AD5173	2	256	One Time Programmable	I2C	2.5, 10, 50, 100	-	+5.5	3.5µA	125	35	$1.32
AD5258	1	64	Non-Volatile	I2C	1, 10, 50, 100	-	+5.5	4µA	85	300	$0.59
AD5259	1	256	Non-Volatile	I2C	5, 10, 50, 100	n/a	+5.5	3µA	85	300	$0.90
AD5231	1	1,024	Non-Volatile	SPI	10, 50, 100	±3	+5.5	2.7µA	85	600	$1.97
AD5251	2	64	Non-Volatile	I2C	1, 10, 50, 100	±3	+5.5	3µA	85	600	$1.97
AD5252	2	256	Non-Volatile	I2C	1, 10, 50, 100	±3	+5.5	3µA	85	300	$1.61
AD5232	2	256	Non-Volatile	SPI	10, 50, 100	±3	+5.5	3.5µA	85	300	$2.40
AD5235	2	1,024	Non-Volatile	SPI	25, 250	±3	+5.5	3.5µA	85	35	$3.52
ADN2850	2	1,024	Non-Volatile	SPI	25, 250	±3	+5.5	3.5µA	85	35	$3.52
AD5255	3	512	Non-Volatile	I2C	25, 250	±3	+5.5	3.5µA	85	35	$5.15
AD5233	4	64	Non-Volatile	SPI	10, 50, 100	±3	+5.5	3.5µA	85	600	$2.50
AD5253	4	64	Non-Volatile	I2C	1, 10, 50, 100	±3	+5.5	3µA	85	300	$2.49
AD5254	4	256	Non-Volatile	I2C	1, 10, 50, 100	±3	+5.5	3µA	85	300	$2.58

* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

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• Production: The model is currently being produced, and generally available for purchase and sampling.
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• Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).

The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

For detailed drawings and chemical composition please consult our  Package Site

Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

This is the acceptable operating range of the device. The various ranges specified are as follows:

• Commercial: 0 to +70 degrees Celsius
• Military : -55 to +125 degrees Celsius
• Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
• Automotive: -40 to +125 degrees Celsius

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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