Zetex (Now Diodes) ZR25D, ZR25D01, ZR25D02 Schematic [ru]

PRECISION 2.5 VOLT MICROPOWER		ZR25D
VOLTAGE REFERENCE
ISSUE 2 - FEBRUARY 1998
DEVICE DESCRIPTION	FEATURES

The ZR25D uses a bandgap circuit design to achieve a precision micropower voltage reference of 2.5 volts. The device is available in a small outline SOT23 surface mount package, ideal for applications where space saving is important.

The ZR25D design provides a stable voltage without an external capacitor and is stable with capacitive loads. The ZR25D is recommended for operation between 50μA and 5mA and so is ideally suited to low power and battery powered applications.

Excellent performance is maintained to an absolute maximum of 25mA, however the rugged design and 20 volt processing allows the reference to withstand transient effects and currents up to 200mA. Superior switching capability allows the device to reach stable operating conditions in only a few microseconds.

∙Small outline SOT23 package.

∙No stabilising capacitor required

∙Typical TC 30ppm/°C

∙Typical slope resistance 0.4Ω

∙± 3%, 2% and 1% tolerance

∙Industrial temperature range

∙Operating current 50μA to 5mA

∙Transient response, stable in less than 10μs

∙Alternative package options available

APPLICATIONS

∙Battery powered and portable equipment.

∙Metering and measurement systems.

∙Instrumentation.

∙Test equipment.

∙Data acquisition systems.

∙Precision power supplies.

SCHEMATIC DIAGRAM

VR

Gnd

4-161

ZR25D

ABSOLUTE MAXIMUM RATING

	Reverse Current	25mA	Power Dissipation (Tamb=25°C)
			SOT23	330mW
	Forward Current	25mA
	Operating Temperature	-40 to 85°C
	Storage Temperature	-55 to 125°C

ELECTRICAL CHARACTERISTICS

TEST CONDITIONS (Unless otherwise stated) Tamb=25°C

SYMBOL		PARAMETER	CONDITIONS		LIMITS				TOL.	UNITS
									%
				MIN		TYP		MAX
VR		Reverse Breakdown Voltage	IR=150μA	2.475		2.5		2.525	1	V
				2.45		2.5		2.55	2
				2.425		2.5		2.575	3
IMIN		Minimum Operating Current				25		50		μA
IR		Recommended Operating		0.05				5		mA
		Current
TC	†	Average Reverse Breakdown				30		90		ppm/°C
		Voltage Temp. Co.	IR(min) to
RS	§	Slope Resistance	IR(max)			0.4		2		Ω
ZR		Reverse Dynamic Impedance	IR = 1mA			0.3		0.8		Ω
			f = 100Hz
			IAC=0.1 IR
EN		Wideband Noise Voltage	IR = 150μA			45				μV(rms)
			f = 100Hz to
			10kHz

			(V ( )−V	( )) x 1000000
	†	TC =	R max	R min
			VR x (T(max)−T(min))

Note: VR(max) - VR(min) is the maximum deviation in reference voltage measured over the full operating temperature range.

	§ RS =	VR Change(IR (min) to IR (max))
		IR (max) − IR (min)

	60
)	50
A
μ
(
t	40
urren
	30
C
e							°C
evers
	20				A=85
					T		°C
						A=25
R	10					T	-40°C
							=
							A
							T
	0
	0.2	0.6	1.0	1.4		1.8		2.2	2.6

Reverse Voltage (V)

Reverse Characteristics

4-162