AD5172 256-Position, One-Time Programmable, Dual Channel, I2C Digital Potentiometer
The AD5172/AD5173 are programmed using a 2-wire, I2C®-compatible digital interface. Unlimited adjustments are allowed before permanently setting the resistance value. During OTP activation, a permanent blow fuse command freezes the wiper position (analogous to placing epoxy on a mechanical trimmer).
Unlike traditional OTP digital potentiometers, the AD5172/ AD5173 have a unique temporary OTP overwrite feature that allows for new adjustments even after a fuse is blown. However, the OTP setting is restored during subsequent power-up condi-tions. This allows users to treat these digital potentiometers as volatile potentiometers with a programmable preset.
Applications
Systems calibration
Electronics level setting
Mechanical trimmers replacement in new designs
Permanent factory PCB setting
Transducer adjustment of pressure, temperature, position, chemical, and optical sensors
RF amplifier biasing
Automotive electronics adjustment
Gain control and offset adjustment
1 The terms digital potentiometer, VR, and RDAC are used interchangeably.
The AD5172/AD5173 are dual-channel, 256-position, one-time programmable (OTP) digital potentiometers1 that employ fuse link technology to achieve memory retention of resistance settings. OTP is a cost-effective alternative to EEMEM for users who do not need to program the digital potentiometer setting in memory more than once. These devices perform the same electronic adjustment function as mechanical potentiometers or variable resistors with enhanced resolution, solid-state reliabil-ity, and superior low temperature coefficient performance.
The AD5172/AD5173 are programmed using a 2-wire, I2C®-compatible digital interface. Unlimited adjustments are allowed before permanently setting the resistance value. During OTP activation, a permanent blow fuse command freezes the wiper position (analogous to placing epoxy on a mechanical trimmer).
Unlike traditional OTP digital potentiometers, the AD5172/ AD5173 have a unique temporary OTP overwrite feature that allows for new adjustments even after a fuse is blown. However, the OTP setting is restored during subsequent power-up condi-tions. This allows users to treat these digital potentiometers as volatile potentiometers with a programmable preset.
Applications
- Systems calibration
- Electronics level setting
- Mechanical trimmers replacement in new designs
- Permanent factory PCB setting
- Transducer adjustment of pressure, temperature, position, chemical, and optical sensors
- RF amplifier biasing
- Automotive electronics adjustment
- Gain control and offset adjustment
1 The terms digital potentiometer, VR, and RDAC are used interchangeably.
Features and Benefits- 2-channel, 256-position potentiometers
- One-time programmable (OTP) set-and-forget resistance setting provides a low cost alternative to EEMEM
- Unlimited adjustments prior to OTP activation
- OTP overwrite allows dynamic adjustments with user-defined preset
- End-to-end resistance: 2.5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ
- Compact 10-lead MSOP: 3 mm × 4.9 mm
- Fast settling time: tS = 5 μs typical in power-up
- See Data Sheet for Additional Information
| Software & Systems Requirements |
Data Sheets
Application Notes
User Guides
Frequently Asked Questions
Order Information
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|
| AD5172BRM10 Last Time Buy | 10 ld MSOP | OTH 50 | -40 to 125C | 0 | 0 | N |
| AD5172BRM100 Last Time Buy | 10 ld MSOP | OTH 50 | -40 to 125C | 1.68 | 1.52 | N |
| AD5172BRM2.5 Last Time Buy | 10 ld MSOP | OTH 50 | -40 to 125C | 1.68 | 1.52 | N |
| AD5172BRM2.5-RL7 Last Time Buy | 10 ld MSOP | REEL 1000 | -40 to 125C | 0 | 0 | N |
| AD5172BRMZ10 Production | 10 ld MSOP | OTH 50 | -40 to 125C | 1.8 | 1.61 | Y |
| AD5172BRMZ10-RL7 Production | 10 ld MSOP | REEL 1000 | -40 to 125C | 0 | 1.61 | Y |
| AD5172BRMZ100 Production | 10 ld MSOP | OTH 50 | -40 to 125C | 1.8 | 1.61 | Y |
| AD5172BRMZ100-RL7 Production | 10 ld MSOP | REEL 1000 | -40 to 125C | 0 | 1.61 | Y |
| AD5172BRMZ2.5 Production | 10 ld MSOP | OTH 50 | -40 to 125C | 1.8 | 1.61 | Y |
| AD5172BRMZ50 Last Time Buy | 10 ld MSOP | OTH 50 | -40 to 125C | 1.46 | 1.32 | Y |
| AD5172BRMZ50-RL7 Last Time Buy | 10 ld MSOP | REEL 1000 | -40 to 125C | 0 | 1.32 | Y |
Evaluation Boards
| Part Number | Description | Price | RoHS |
|---|
| EVAL-AD5172SDZ | Evaluation Board | 59 | Y |
| EVAL-SDP-CB1Z | SDP-B Controller Board (also required) | 99 | Y |
Reference Materials
