Overview
Features and Benefits
- Precision 50µA, ±1.5% Initial Full-Scale Output Current, ±2.5% Over Temperature
- Wide Output Voltage DC Compliance: –15V to (VCC – 1.3V)
- Wide Supply Range: 2.7V ≤ VCC ≤ 5.5V
- Supply Current in Shutdown: 10µA Typ
- Low Supply Current: 115µA Typ
- Available in 8-Pin SO
- SMBus Serial Interface
- Four Selectable SMBus Addresses
- DAC Powers Up at Zero or Midscale
- DAC Contents Are Retained in Shutdown
Product Details
The LTC1427-50 is a micropower, 10-Bit current output DAC with an output range of 0µA to 50µA. The DAC output is guaranteed monotonic and DNL is less than 0.9LSB under all operating conditions. Full-scale accuracy is ±2.5% over the commercial temperature range. The LTC1427-50 operates with power supply voltages from 2.7V to 5.5V and the DAC current source output can be biased from (VCC – 1.3V) to –15V.
The LTC1427-50 communicates with external circuitry by using the SMBus serial interface. It acts as an SMBus slave device using one of four selectable SMBus addresses set by the two address pins AD0 and AD1.
On power-up, the DAC output assumes midrange or zero scale, depending on the logic state of the two address pins. The LTC1427-50 can be shut down through the SHDN pin or by setting the SHDN bit = 1 in the SMBus command byte. Digital data for the DAC output is retained internally and the supply current drops to 10µA typically when in shutdown.
The LTC1427-50 is available in an 8-pin SO package.
Applications
- LCD Contrast and Backlight Brightness Control
- Power Supply Voltage Adjustment
- Battery Charger Voltage/Current Adjustment
- GaAs FET Bias Adjustment
- Trimmer Pot Elimination
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
-
R392 Reliability Data3/22/2018
-
DAC Selector Card9/21/2015
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An SMBus-Controlled 10-Bit, Current Output, 50µA Full-Scale DAC2/1/1998 LT Journal
Product Recommendations
LTC1427-50 Companion Parts
Recommended µModule Isolator
Design Resources
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.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LTC1427CS8-50#PBF | Material Declaration | Reliability Data | 8-Lead SOIC (Narrow 0.15 Inch) | |
| LTC1427CS8-50#TRPBF | Material Declaration | Reliability Data | 8-Lead SOIC (Narrow 0.15 Inch) | |
| Wafer Fabrication Data | R392 Reliability Data |
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