Power Management
System Supervisor, Monitor and Control
Power Monitors
Power Management
System Supervisor, Monitor and Control
Temperature Monitors
LTC2991 - Octal I2C Voltage, Current, and Temperature Monitor
Features
- Measures Voltage, Current, Temperature
- Measures Four Remote Diode Temperatures
- 0.7°C (Typ) Accuracy, 0.06°C Resolution
- 1°C (Typ) Internal Temperature Sensor
- Series Resistance Cancellation
- 14-Bit ADC Measures Voltage/Current
- PWM Temperature Output
- 3V to 5.5V Supply Operating Voltage
- Eight Selectable Addresses
- Internal 10ppm/°C Voltage Reference
- V1 to V8 Inputs ESD Rated to 6kV HBM
- 16-Lead MSOP Package
Typical Application
Description
The LTC®2991 is used to monitor system temperatures, voltages and currents. Through the I2C serial interface, the eight monitors can individually measure supply voltages and can be paired for differential measurements of current sense resistors or temperature sensing transistors. Additional measurements include internal temperature and internal VCC. The internal 10ppm reference minimizes the number of supporting components and area required. Selectable address and configurable functionality give the LTC2991 flexibility to be incorporated in various systems needing temperature, voltage or current data. The LTC2991 fits well in systems needing submillivolt voltage resolution, 1% current measurement and 1°C temperature accuracy or any combination of the three.
Packaging
For complete and up to date package information and drawings, please refer to our packaging page
MS-16
Order Info
- Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) | Price (1k)* | RoHS Data |
|---|---|---|---|---|---|---|
| LTC2991CMS#PBF | MSOP | 16 | C | $6.43 | $4.50 | View |
| LTC2991CMS#TRPBF | MSOP | 16 | C | $4.56 | View | |
| LTC2991IMS#PBF | MSOP | 16 | I | $7.39 | $5.18 | View |
| LTC2991IMS#TRPBF | MSOP | 16 | I | $5.24 | View | |
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1785A | LTC2991 | I2C Temperature, Voltage, and Current Monitor (requires DC590B) | $50.00 | |
| Buy Now | |||
Companion Boards
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC590B | USB Serial Controller for Linear Technology QuikEval Demo Boards | $50.00 | |
| Buy Now | |||
Applications
- Temperature Measurement
- Supply Voltage Monitoring
- Current Measurement
- Remote Data Acquisition
- Environmental Monitoring
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Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.