USF340-2.00M-0.01%-5PPM datasheet, PDF

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USF340-2.00M-0.01%-5PPM: Descriptionres 2M ohm 1/3W 0.01% radial; CategoryPassive components The resistor; File Size175KB，2 Pages; ManufacturerCaddock

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USF340-2.00M-0.01%-5PPM Overview

res 2M ohm 1/3W 0.01% radial

USF340-2.00M-0.01%-5PPM Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Maker	Caddock
package instruction	Radial,
Reach Compliance Code	compliant
structure	Rectangular
Lead diameter	0.81 mm
Lead length	12.7 mm
lead spacing	15.24 mm
Installation features	THROUGH HOLE MOUNT
Number of terminals	2
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package height	9.53 mm
Package length	19.05 mm
Package form	Radial
Package width	1.91 mm
Rated power dissipation(P)	0.33 W
resistance	2000000 Ω
Resistor type	FIXED RESISTOR
surface mount	NO
technology	METAL GLAZE/THICK FILM
Temperature Coefficient	5 ppm/°C
Terminal shape	WIRE
Tolerance	0.01%
Operating Voltage	300 V

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Type USF Ultra-Stable Low TC Film Resistors

200 Series and 300 Series

New

Zero Nominal TC

— Maximum Absolute TC to 2 ppm/°C, -40°C to +85°C ref. to +25°C

Absolute Tol. to ±0.01%, Resistance Range 50 Ohm to 25 Megohm, Voltage Ratings up to 2500 Volts

The USF Ultra-Stable Low TC Ultra-Precision Film Resistors were

developed to meet the requirements for increasing performance for

resistors in high performance analog electronics.

Utilizing Caddock

proprietary resistance ﬁlm systems, the Type USF resistors provide

the Lowest TC with the Widest Resistance Range and the Highest

Voltage Ratings available in the industry.

Page 1 of 2

•

Resistance Range 50 ohm to 25 Megohm.

•

Temperature Coefﬁcient -40°C to +85°C, referenced to +25°C

•

Tolerance: ±0.01% or ±0.10%.

•

Speciﬁc standard resistance values are available that are most

200 Series —

ZERO Nominal TC

— Maximum Absolute TC 2 ppm/°C

300 Series —

ZERO Nominal TC

— Maximum Absolute TC 5 ppm/°C

•

300 Series “matched pairs” are available with ratio TC as tight as

•

Ceramic package provides cool operation.

0.5 ppm/°C. Contact Applications Engineering.

commonly required in high accuracy analog design. These values

were selected and optimized for produceability and performance.

Type USF 200 Series Ultra-Stable Resistors

•

Type USF Ultra-Stable Resistors are offered in standard resistance values

that are most commonly used in precision analog design. These standard

resistance values can be used in precise ampliﬁer gain setting, precise

resistor bridge circuits, precise transducer sense circuits, and precise

voltage dividers with up to 2500 volt input voltage.

Extremely Low Power Coefﬁcient (Wattage Coefﬁcient):

Type USF

resistors are constructed with an aluminum oxide ceramic sandwich

which provides great thermal conductivity. The ceramic sandwich

package very effectively minimizes the power coefﬁcient drift. Power

coefﬁcient is the resistance drift due to temperature rise in the element

caused by the power (wattage) dissipation in the resistor where the self-

heating temperature rise of the resistor element results in TC drift (temp.

rise in °C, times the temperature coefﬁcient of the resistor). In the USF

package, heat is pulled away from the resistance material efﬁciently by

this ceramic sandwich package construction. Plastic molded Low TC foil

resistors cannot provide this outstanding beneﬁt since the plastic impedes

the ﬂow of heat, causing greater temperature rise at the resistor element

and greater self-heating related resistance drift due to power dissipation.

The USF 200 Series resistors provide a new level of performance with

near ZERO TC, very low power coefﬁcient, wide resistance range, and

higher voltage ratings than is offered by other resistor technologies.

Model Number

USF240

USF270

USF271

USF340

+85°C

•

Constructed with two selected USF 300 Series

Resistors bonded back to back to achieve

outstanding low Absolute Temperature Coefﬁcient

performance. The resistors are to be connected in

parallel on the circuit board.

ZERO Nominal TC

— Max. Absolute TC: 2 ppm/°C,

-40°C to +85°C, referenced to +25°C

Type USF 300 Series Ultra-Stable Resistors

•

ZERO Nominal TC

— Max. Absolute TC: 5 ppm/°C,

-40°C to +85°C, referenced to +25°C

Fig.

Dimensions inches (mm)

Wattage

Maximum

Continuous

Oper. Voltage

Resistance

Min.

Max.

Temperature

Coefficient

.375

±.020

(9.53

±.51)

.500

±.020

(12.70

±.51)

.500

±.020

(12.70

±.51)

.375

±.020

(9.53

±.51)

.500

±.020

(12.70

±.51)

.500

±.020

(12.70

±.51)

0.33

0.75

0.33

0.75

300

1,400

2,500

300

1,400

Ω

990 K

9.9 Meg

Ω

990 K

19.8 Meg

10 Meg

5 Meg

10 Meg

20 Meg

10 Meg

25 Meg

2 ppm/°C

5 ppm/°C

.750

±.020

(19.05

±.51)

1.500

±.020

(38.10

±.51)

1.500

±.020

(38.10

±.51)

.750

±.020

(19.05

±.51)

1.500

±.020

(38.10

±.51)

1.500

±.020

(38.10

±.51)

.425 Max.

(10.8 Max.)

.550 Max.

(13.97 Max.)

.550 Max.

(13.97 Max.)

.395 Max.

(10.03 Max.)

.520 Max.

(13.21 Max.)

.520 Max.

(13.21 Max.)

.600

±.020

(15.24

±.51)

1.350

±.020

(34.29

±.51)

1.350

±.020

(34.29

±.51)

.600

±.020

(15.24

±.51)

1.350

±.020

(34.29

±.51)

1.350

±.020

(34.29

±.51)

USF370

USF371

5 ppm/°C

0.75

2,500

Applications Engineering

17271 North Umpqua Hwy.

Roseburg, Oregon 97470-9422

Phone: (541) 496-0700

Fax: (541) 496-0408

CADDOCK

e-mail: caddock@caddock.com • web: www.caddock.com

For Caddock Distributors listed by country see caddock.com/contact/dist.html

Sales and Corporate Ofﬁce

1717 Chicago Avenue

Riverside, California 92507-2364

Phone: (951) 788-1700

Fax: (951) 369-1151

28_IL134.1004

USF340-2.00M-0.01%-5PPM Related Products

	USF340-2.00M-0.01%-5PPM	USF371-20.0M-0.1%-5PPM	USF240-2.50K-0.1%-2PPM	USF340-10.0K-0.01%-5ppm	USF271-9.99M-0.01%-2PPM	USF240-100K-0.10%-2PPM/C	USF240-90.0K-0.10%-2PPM/C	USF340-200-0.10%-5PPM/C
Description	res 2M ohm 1/3W 0.01% radial	res 20m ohm 3/4W 0.1% radial	metal film resistors - through hole 2.5K ohm 0.1% 2 ppm	metal film resistors - through hole 10k ohm 0.01% 5ppm	metal film resistors - through hole 9.99m ohm 0.01% 2ppm	Array/Network Resistor, Bussed, 0.33W, 300V, 0.1% +/-Tol, 2ppm/Cel, Through Hole Mount, RADIAL LEADED-4	Array/Network Resistor, Bussed, 0.33W, 300V, 0.1% +/-Tol, 2ppm/Cel, Through Hole Mount, RADIAL LEADED-4	Fixed Resistor, 0.33W, 200ohm, 300V, 0.1% +/-Tol, 5ppm/Cel, 7508,
Maker	Caddock	Caddock	Caddock	Caddock	-	Caddock	Caddock	-
package instruction	Radial,	Radial,	PCB Mount,	Radial,	-	,	RADIAL LEADED-4	-
Reach Compliance Code	compliant	compliant	compliant	compliant	-	compliant	compliant	compliant
structure	Rectangular	Rectangular	Rectangular	Rectangular	-	-	-	Rectangular
Lead length	12.7 mm	12.7 mm	12.7 mm	12.7 mm	-	-	-	12.7 mm
Installation features	THROUGH HOLE MOUNT	THROUGH HOLE MOUNT	THROUGH HOLE MOUNT	THROUGH HOLE MOUNT	-	THROUGH HOLE MOUNT	THROUGH HOLE MOUNT	-
Number of terminals	2	2	4	2	-	4	4	2
Maximum operating temperature	85 °C	85 °C	85 °C	85 °C	-	85 °C	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C	-40 °C	-	-40 °C	-40 °C	-40 °C
Package height	9.53 mm	12.7 mm	9.53 mm	9.53 mm	-	-	-	9.53 mm
Package length	19.05 mm	38.1 mm	19.05 mm	19.05 mm	-	-	-	19.05 mm
Package form	Radial	Radial	PCB Mount	Radial	-	-	-	Radial
Package width	1.91 mm	1.91 mm	3.94 mm	1.91 mm	-	-	-	1.91 mm
Rated power dissipation(P)	0.33 W	0.75 W	0.33 W	0.33 W	-	0.33 W	0.33 W	0.33 W
Resistor type	FIXED RESISTOR	FIXED RESISTOR	ARRAY/NETWORK RESISTOR	FIXED RESISTOR	-	ARRAY/NETWORK RESISTOR	ARRAY/NETWORK RESISTOR	FIXED RESISTOR
surface mount	NO	NO	NO	NO	-	NO	NO	-
Temperature Coefficient	5 ppm/°C	5 ppm/°C	2 ppm/°C	5 ppm/°C	-	2 ppm/°C	2 ppm/°C	5 ppm/°C
Terminal shape	WIRE	WIRE	WIRE	WIRE	-	WIRE	WIRE	-
Tolerance	0.01%	0.1%	0.1%	0.01%	-	0.1%	0.1%	0.1%
Operating Voltage	300 V	2500 V	300 V	300 V	-	300 V	300 V	300 V

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