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1717 Chicago Avenue
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Roseburg, Oregon 97470-9422
Phone: (541) 496-0700
Fax: (541) 496-0408
e-mail: caddock@caddock.com • web: www.caddock.com
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© 2004 Caddock Electronics, Inc.
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.
Type USVD and Type HVD
Ultra-Precision Voltage Dividers - 450 Volts to 5 KV
Specifications:
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 Coefficient (RT : R2): See table.
Ratio Temperature Coefficient from -40°C to +85°C.
Ratio Voltage Coefficient (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
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.
Part Number
Resistance
R1
R2
USVD2 - B1M - 010 - 02
USVD2 - B1M - 025 - 0
2
USVD2 - B2M - 010 - 0
2
USVD2 - B2M - 025 - 0
2
USVD2 - A10M - 010 - 02
USVD2 - A10M - 025 - 02
USVD2 - B10M - 010 - 02
USVD2 - B10M - 025 - 02
USVD2 - A20M - 010 - 02
USVD2 - A20M - 025 - 02
USVD2 - B20M - 010 - 02
USVD2 - B20M - 025 - 02
HVD5 - A10M - 050 - 05
HVD5 - B10M - 050 - 0
5
HVD5 - A20M - 050 - 05
HVD5 - B20M - 050 - 0
5
HVD5 - A50M - 050 - 05
HVD5 - B50M - 050 - 0
5
Vmax
Voltage
Division
(RT : R2)
RT = R1 + R2
Ratio
Tolerance
(RT : R2)
Ratio T.C.
(RT : R2)
Ratio V.C
.
(RT : R2)
450
450
650
650
1400
1400
1400
1400
2000
2000
2000
2000
1500
1500
2500
2500
5000
5000
100 : 1
100 : 1
100 : 1
100 : 1
1,000 : 1
1,000 : 1
100 : 1
100 : 1
1,000 : 1
1,000 : 1
100 : 1
100 : 1
1,000 : 1
100 : 1
1,000 : 1
100 : 1
1,000 : 1
100 : 1
990 K
990
K
1.98 Meg
1.98 Meg
9.99 Meg
9.99 Meg
9.9 Meg
9.9 Meg
19.98 Meg
19.98 Meg
19.8 Meg
19.8 Meg
9.99 Meg
9.9 Meg
19.98 Meg
19.8 Meg
49.95 Meg
49.5 Meg
10 K
10
K
20
K
20
K
10
K
10
K
100
K
100 K
20
K
20
K
200
K
200
K
10 K
100 K
20 K
200 K
50 K
500 K
1 Meg
1 Meg
2 Meg
2 Meg
10 Meg
10 Meg
10 Meg
10 Meg
20 Meg
20 Meg
20 Meg
20 Meg
10 Meg
10 Meg
20 Meg
20 Meg
50 Meg
50 Meg
0.01%
0.025%
0.01%
0.025%
0.01%
0.025%
0.01%
0.025%
0.01%
0.025%
0.01%
0.025%
0.05%
0.05%
0.05%
0.05%
0.05%
0.05%
2 ppm/°C
2 ppm/
°C
2 ppm/
°C
2 ppm/
°C
2 ppm/
°C
2 ppm/
°C
2 ppm/
°C
2 ppm/°C
2 ppm/
°C
2 ppm/
°C
2 ppm/
°C
2 ppm/
°C
5 ppm/°C
5 ppm/°C
5 ppm/°C
5 ppm/°C
5 ppm/°C
5 ppm/°C
0.05 ppm/V
0.05 ppm/
V
0.02 ppm/
V
0.02 ppm/
V
0.02 ppm/
V
0.02 ppm/
V
0.02 ppm/
V
0.02 ppm/V
0.02 ppm/
V
0.02 ppm/
V
0.02 ppm/
V
0.02 ppm/
V
0.02 ppm/V
0.02 ppm/
V
0.02 ppm/
V
0.02 ppm/
V
0.04 ppm/
V
0.04 ppm/
V
Fig.
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
Continuous
Operating
Voltage
(VDC)
Pin 1
Pin 1
Input
Pin 2
To be held
near ground
Pin 1, 2, and 3
Input
Pin 6
To be held
near ground
Pin1
See note
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)
.
Circuit Board
Trace
4
2
1
3
R1
R2
Marking Side
1.500 ±.020
(38.1
±.51)
.500 ±.020
(12.7 ±.51)
.200 ±.020
(5.08
±.51)
.800 ±.020
(20.32 ±.51)
1.350 ±.020
(34.29
±.51)
.032 DIA.
(.81 DIA.)
CADDOCK
USVD2-A20M-010-02
0422
.115 ±.020
(2.92 ±.51)
0.110 Max.
(2.79 Max.)
0.010
±.002
(0.25
±.05)
CADDOCK
HVD5-A50M-050-05
0247
0.050 ±0.015
(1.27 ±0.38)
0.610 Max.
(15.5 Max.)
0.100 (2.54)
0.150 ±.040
(3.81 ±1.0)
0.020 ±.002
(0.51 ±.05)
0.900
(22.86)
0.100 (2.54)
0.100 (2.54)
0.200 (5.08)
1.500 ±.020
(38.10 ±.51)
.500 ±.125
(12.7 ±3.18)
FIG. 1
FIG. 2
CADDOCK
HVD5-A50M-050-05
0409
Marking Side
.155 ±.025
(3.94
±..64)
1
4 6
R1 R2
2 3
5
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 specifications that optimize the performance and
the cost for your application.
28_IL132.1004
