ZRA125N802 datasheet, PDF - EEWORLD Datasheet

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ZRA125N802: DescriptionTwo Terminal Voltage Reference, 1 Output, 1.25V, BIPolar, PDSO8, SOP-8; CategoryPower/power management The power supply circuit; File Size124KB，3 Pages; ManufacturerZetex Semiconductors; Websitehttp://www.zetex.com/

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ZRA125N802 Overview

Two Terminal Voltage Reference, 1 Output, 1.25V, BIPolar, PDSO8, SOP-8

ZRA125N802 Parametric

Parameter Name	Attribute value
Is it Rohs certified?	incompatible
Maker	Zetex Semiconductors
package instruction	SOP, SOP8,.25
Reach Compliance Code	unknown
ECCN code	EAR99
Analog Integrated Circuits - Other Types	TWO TERMINAL VOLTAGE REFERENCE
JESD-30 code	R-PDSO-G8
JESD-609 code	e0
length	4.89 mm
Humidity sensitivity level	1
Number of functions	1
Output times	1
Number of terminals	8
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Maximum output voltage	1.275 V
Minimum output voltage	1.225 V
Nominal output voltage	1.25 V
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Encapsulate equivalent code	SOP8,.25
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Certification status	Not Qualified
Maximum seat height	1.75 mm
Maximum supply current (Isup)	5 mA
surface mount	YES
technology	BIPOLAR
Maximum voltage temperature coefficient	90 ppm/°C
Temperature level	INDUSTRIAL
Terminal surface	Tin/Lead (Sn/Pb)
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
Fine-tuning/adjustable output	NO
Maximum voltage tolerance	2%
width	3.9 mm
Base Number Matches	1

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Design Note 26

Issue 2 January 1996

D.C. Motor Speed Control using the ZTX450

Introduction

The function of the following circuit is to

improve the load/speed regulation of a

d.c. machine. One of the main reasons

why the speed of a permanent magnet

field d.c. motor varies with load, is that

a voltage drop is current and hence load

dependent. The circuit given in Figure 1

stabilises the speed of the motor by

cancelling out the effect of the motor

rotor resistance using a bridge circuit.

D1

1N4000

Theory

If the bridge and variable resistor are

analysed on their own (Figure 2), a proof

can be derived which shows that the

control voltage (i.e. the speed) is not

directly dependent on the motor current.

(Please

refer to Appendix).

The value of r

a

varies from motor to

motor, so the bridge must be balanced

to suit the motor employed.

+6V

100

1

U1 ZRA125

M

R3

22

C2

RV1

Q3

Q2

220

C3

100µF

Q2,3 - ZTX214C

330

ra

0.1µF

C1

220pF

R1

270

R2

680

Q1

ZTX450

0V

Figure 1

DC Motor Speed Control Circuit.

DN26 - 1

ZRA125N802 Related Products

	ZRA125N802	ZRA125Y02	ZRA125N803	ZRA125Y01
Description	Two Terminal Voltage Reference, 1 Output, 1.25V, BIPolar, PDSO8, SOP-8	Two Terminal Voltage Reference, 1 Output, 1.25V, BIPolar, PSIP2	Two Terminal Voltage Reference, 1 Output, 1.25V, BIPolar, PDSO8, SOP-8	Two Terminal Voltage Reference, 1 Output, 1.24V, BIPolar, PSIP2
Is it Rohs certified?	incompatible	incompatible	incompatible	incompatible
Maker	Zetex Semiconductors	Zetex Semiconductors	Zetex Semiconductors	Zetex Semiconductors
package instruction	SOP, SOP8,.25	SIP, SIP2,.05	SOP, SOP8,.25	SIP, SIP2,.05
Reach Compliance Code	unknown	unknown	unknow	unknow
ECCN code	EAR99	EAR99	EAR99	EAR99
Analog Integrated Circuits - Other Types	TWO TERMINAL VOLTAGE REFERENCE	TWO TERMINAL VOLTAGE REFERENCE	TWO TERMINAL VOLTAGE REFERENCE	TWO TERMINAL VOLTAGE REFERENCE
JESD-30 code	R-PDSO-G8	R-PSIP-T2	R-PDSO-G8	R-PSIP-T2
JESD-609 code	e0	e0	e0	e0
length	4.89 mm	4.57 mm	4.89 mm	4.57 mm
Number of functions	1	1	1	1
Output times	1	1	1	1
Number of terminals	8	2	8	2
Maximum operating temperature	85 °C	85 °C	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C	-40 °C
Maximum output voltage	1.275 V	1.275 V	1.29 V	1.252 V
Minimum output voltage	1.225 V	1.225 V	1.21 V	1.228 V
Nominal output voltage	1.25 V	1.25 V	1.25 V	1.24 V
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	SOP	SIP	SOP	SIP
Encapsulate equivalent code	SOP8,.25	SIP2,.05	SOP8,.25	SIP2,.05
Package shape	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	SMALL OUTLINE	IN-LINE	SMALL OUTLINE	IN-LINE
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	1.75 mm	4.01 mm	1.75 mm	4.01 mm
Maximum supply current (Isup)	5 mA	5 mA	5 mA	5 mA
surface mount	YES	NO	YES	NO
technology	BIPOLAR	BIPOLAR	BIPOLAR	BIPOLAR
Maximum voltage temperature coefficient	90 ppm/°C	90 ppm/°C	90 ppm/°C	90 ppm/°C
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Terminal surface	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)
Terminal form	GULL WING	THROUGH-HOLE	GULL WING	THROUGH-HOLE
Terminal pitch	1.27 mm	2.54 mm	1.27 mm	2.54 mm
Terminal location	DUAL	SINGLE	DUAL	SINGLE
Fine-tuning/adjustable output	NO	NO	NO	NO
Maximum voltage tolerance	2%	2%	3%	1%
width	3.9 mm	2.285 mm	3.9 mm	2.285 mm

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