Overview
The AD5121BCPZ100-RL7 is a nonvolatile digital potentiometer produced by Analog Devices Inc. This device is part of the AD5121/AD5141 series, designed to provide a precise and reliable solution for 128-position adjustment applications. It features low resistor tolerance errors of ±8% and a high current density of up to ±6 mA in the A, B, and W pins. The AD5121BCPZ100-RL7 operates over a wide temperature range of −40°C to +125°C and is qualified for automotive applications.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Number of Taps | N | - | - | 128 | - |
| Resistance | RAB | - | - | 100 kΩ | - |
| Resistor Tolerance | - | - | - | ±8% | - |
| Wiper Current | IA, IB, IW | -6 | - | +6 | mA |
| Temperature Coefficient | - | - | - | 35 ppm/°C | - |
| Bandwidth | BW | - | - | 3 MHz | - |
| Start-up Time | - | - | - | < 75 μs | - |
| Supply Voltage | VDD | 2.3 | - | 5.5 | V |
| Logic Supply Voltage | VLOGIC | 1.8 | - | 5.5 | V |
| Operating Temperature | TA | -40 | - | +125 | °C |
| Package Type | - | - | - | 16-Lead LFCSP (3mm x 3mm w/ EP) | - |
Key Features
- Nonvolatile solution for 128-position adjustment applications
- Low resistor tolerance errors of ±8%
- High current density of up to ±6 mA in the A, B, and W pins
- Linear gain setting mode for independent programming of resistance between terminals
- Single- and dual-supply operation
- Independent logic supply: 1.8 V to 5.5 V
- Wide bandwidth: 3 MHz
- Fast start-up time: < 75 μs
- Low wiper resistance: 40 Ω at the ends of the resistor array
- SPI- and I2C-compatible digital interface
- Compact 16-lead LFCSP package (3mm x 3mm w/ EP)
Applications
- Portable electronics level adjustment
- LCD panel brightness and contrast controls
- Programmable filters, delays, and time constants
- Programmable power supplies
Q & A
- What is the number of taps in the AD5121BCPZ100-RL7?
The AD5121BCPZ100-RL7 has 128 taps.
- What is the resistance value of the AD5121BCPZ100-RL7?
The resistance value is 100 kΩ.
- What is the resistor tolerance of the AD5121BCPZ100-RL7?
The resistor tolerance is ±8%.
- What is the maximum wiper current of the AD5121BCPZ100-RL7?
The maximum wiper current is ±6 mA.
- What is the temperature coefficient of the AD5121BCPZ100-RL7?
The temperature coefficient is 35 ppm/°C.
- What is the bandwidth of the AD5121BCPZ100-RL7?
The bandwidth is 3 MHz.
- What is the start-up time of the AD5121BCPZ100-RL7?
The start-up time is less than 75 μs.
- What are the supply voltage ranges for the AD5121BCPZ100-RL7?
The supply voltage ranges are 2.3 V to 5.5 V and ±2.25 V to ±2.75 V.
- What is the operating temperature range of the AD5121BCPZ100-RL7?
The operating temperature range is −40°C to +125°C.
- What interface options are available for the AD5121BCPZ100-RL7?
The device supports SPI and I2C interfaces.
