Type USVD and Type HVD Ultra-Precision Voltage Dividers - 450 Volts to 5 KV Type USVD Ultra-Precision Voltage Dividers have the very highest precision available in voltage dividers in the range of 450 Volts DC up to 2000 Volts DC. These dividers are formed by bonding together two selected Type USF Ultra-Precision Resistors. The precise selection of these high performance resistors, which form the voltage dividers, makes possible the outstanding voltage division performance. Ratio Tolerance as tight as 0.01% and Ratio TC of 2ppm/°C. Part Number Vmax Continuous Operating Voltage (VDC) Type HVD Ultra-Precision Voltage Dividers are monolithic voltage dividers built with ceramic sandwich construction. These voltage dividers have ultra-precision performance in the range of 1500 volts DC to 5000 volts DC, with a Ratio Tolerance of 0.05% and Ratio TC of 5ppm/°C. These dividers are ideal for high performance voltage division applications in medical equipment, laboratory equipment, analytical instruments, etc. Pin 2 To be held near ground Circuit Board Trace Applications Engineering 17271 North Umpqua Hwy. Roseburg, Oregon 97470-9422 Phone: (541) 496-0700 Fax: (541) 496-0408 © 2004 Caddock Electronics, Inc. Absolute Tolerance: ±0.10% for all resistors, measured at +23°C ±2°C. Ratio Tolerance (RT : R2): See table. Ratio Tolerance measured at +23°C ±2°C, with 100 volts DC applied to the divider. Absolute TC: USVD2: 10 ppm/°C, HVD5: 30 ppm/°C, referenced to +25°C, ΔR taken at -40°C and +85°C. Ratio Temperature Coefcient (RT : R2): See table. Ratio Temperature Coefcient from -40°C to +85°C. Ratio Voltage Coefcient (RT : R2): See table. Maximum Ratio V.C. measured at 10% of Vmax. to 100% of Vmax. Voltage Rating: Maximum voltage (volts DC) applied to RT = (R1 + R2). See table. Load Life Stability: Ratio stability with maximum continuous operating voltage applied to the divider for 1000 hours at +85°C, ratio change 0.02% max. Overvoltage: 1.5 times rated voltage for 5 seconds, ratio change 0.02% max. Thermal Shock: Mil-Std-202, Method 107, Cond. A, except minimum temperature is -40°C, ratio change 0.02% max. Operating Temperature: -40°C to +85°C Custom Type USVD and Type HVD Voltage Dividers: For high quantity applications (greater than 1000 per year) these voltage dividers can be produced with custom voltage division ratios and ratio specications that optimize the performance and the cost for your application. Note: Lead form detail provides interference in the circuit board hole to achieve a vertical mount of the device. Recommended circuit board hole is nominally 0.039 inch (.99 mm). e-mail: [email protected] • web: www.caddock.com For Caddock Distributors listed by country see caddock.com/contact/dist.html Sales and Corporate Ofce 1717 Chicago Avenue Riverside, California 92507-2364 Phone: (951) 788-1700 Fax: (951) 369-1151 28_IL132.1004