Z201LT250R00TB datasheet, PDF - EEWORLD Datasheet

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Z201LT250R00TB: DescriptionUltra High Precision Z-Foil Resistor with TCR of Â± 0.05 ppm/Â°C, PCR of 5 ppm at Rated Power, Tolerance of Â± 0.005 %; File Size680KB，7 Pages; ManufacturerVishay; Websitehttp://www.vishay.com

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Z201LT250R00TB Overview

Ultra High Precision Z-Foil Resistor with TCR of Â± 0.05 ppm/Â°C, PCR of 5 ppm at Rated Power, Tolerance of Â± 0.005 %

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Z Series (Z Foil)

Ultra High Precision Z Foil Though-Hole Resistor

with TCR of ±0.2 ppm/°C, Tolerance of ±0.005% (50 ppm),

Load Life Stability of ±0.005%

FEATURES

•

Temperature coefficient of resistance (TCR):

±0.2 ppm/°C typical (–55°C to +125°C, +25°C ref.)

(see table 1)

• Rated power: to 1 W at +125°C (see table 2)

• Resistance tolerance: to ±0.005% (50 ppm)

• Load life stability: ±0.005% at 70°C, 2000 h or

±0.015% at 70°C, 10000 h (see table 4)

• Resistance range: 5 Ω to 600 kΩ

• Bulk Metal

Foil resistors are not restricted to standard

values; specific “as required” values can be supplied

at no extra cost or delivery (e.g. 1K2345 vs. 1K)

• Total accumulated change in resistance value over life

or Total Error Budget <0.1% (or tighter with PMO)**

• Electrostatic Discharge (ESD): at least to 25 kV

• Non-inductive, non-capacitive design

• Rise time: 1 ns effectively no ringing

• Current noise: ≤0.010 μV

RMS

/V of applied voltage

(<–40 dB)

• Thermal EMF: 0.05 μV/°C typical

• Voltage coefficient: <3 ppm/V

• Low inductance: <0.08 μH typical

• Thermal stabilization time <1 s (to reach within 10 ppm

of steady state value)

• Pattern design minimizing hot spots

• Terminal finish: lead (Pb)-free or tin/lead alloy

• Matched sets are available per request

(TCR tracking: to 0.5 ppm/°C)

• Military established reliability “R” level resistor available

(see resistor model RNC90Z)

• Screen/test flow as modified from S-311-P813

proposed by NASA available

(see datasheet for resistor model 303143)

• Prototype quantities available please contact

foil@vpgsensors.com

The stability of a resistor depends primarily on its history

of exposures to temperature. Stability is affected by:

1. Reversible changes in the ambient temperature

and heat from adjacent components (defined by the

Temperature Coefficient of Resistance, or TCR)

2. Short-term steady-state self-heating (defined by

Power TCR or PCR)

3. Irreversible destabilizing shock of suddenly-applied

power

4. Long-term exposure to applied power (load-life

stability)

In very high-precision resistors, these effects must be

taken into account to achieve high stability with changes

in load (Joule Effect) and ambient temperature.

Vishay Foil Resistors’ Z Foil technology provides an order

of magnitude reduction in the Bulk Metal Foil element’s

sensitivity to temperature changes – both external and

internal. This technology provides TCR of ±0.2 ppm/°C

typical (military range: –55°C to +125°C, +25°C ref), and a

PCR of 5 ppm at rated power.

In order to take full advantage of this TCR improvement,

it is necessary to take into account the differences in

the resistor’s response to each of the above-mentioned

effects. The Z series has been developed to successfully

deal with these factors.

* This datasheet provides information about parts that are

RoHS-compliant and/or parts that are non-RoHS-compliant.

For example, parts with lead (Pb) terminations are not

RoHS compliant. Please see the information/tables in this

datasheet for details.

** See PMO page 5

INTRODUCTION

The Bulk Metal

Foil resistor is based on a special

thermo-metalic stress concept wherein a proprietary bulk

metal cold rolled foil is cemented to a ceramic substrate.

It is then photoetched into a resistive pattern. Then it

is laser adjusted to any desired value and tolerance.

Because the metals used are not drawn, wound or

mistreated in any way during manufacturing process,

the Bulk Metal Foil resistor maintains all its design,

physical and electrical characteristics while winding

of wire or sputtering does not. Z Foil resistors achieve

maximum stability and near-zero TCR. These performance

characteristics are built-in for every unit, and do not

rely on screening or other artificial means for uniform

performance.

Document No.: 63187

Revision: 01-Nov-2016

TABLE 1 – TYPICAL TCR AND MAX. SPREAD

(–55°C to +125°C, +25°C ref.)

VALUE

100 Ω to 600 kΩ

80 Ω to <100 Ω

50 Ω to <80 Ω

25 Ω to <50 Ω

10 Ω to <25 Ω

5 Ω to <10 Ω

STANDARD

TOLERANCE

±0.005%

±0.01%

±0.02%

±0.05%

TYPICAL TCR AND

MAX. SPREAD (ppm/°C)

±0.2 ±0.6

±0.2 ±0.8

±0.2 ±1.0

±0.2 ±1.3

±0.2 ±1.6

±0.2 ±2.3

www.vishayfoilresistors.com

For any questions, contact

foil@vpgsensors.com

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