Zetex ZRT100A1, ZRT100C1, ZRT100C2, ZRT100GA1, ZRT100GC1 Datasheet

9.8V LOW POWER		ZRT100
PRECISION REFERENCE SOURCE
ISSUE 1 - OCTOBER 1995
DEVICE DESCRIPTION	FEATURES

The ZRT100 is a monolithic integrated circuit providing a precise stable reference voltage of 9.8V at 500μA.

The circuit features a knee current of 150μA and operation over a wide range of temperatures and currents.

The ZRT100 is available in a 3-pin metal can package for through hole applications as well as SOT223 and SO8 packages for surface mount applications. Each package option offers a trim facility whereby the output voltage can be adjusted as shown in Fig.1. This facility is used when compensating for system errors or setting the reference output to a particular value. When the trim facility is not used, the pin should be left open circuit.

∙Trimmable output

∙Excellent temperature stability

∙Low output noise figure

∙Available in two temperature ranges

∙1 and 2% initial voltage tolerance versions available

∙No external stabilising capacitor required in most cases

∙Low slope resistance

∙TO18 package

∙SOT223 and SO8 small outline packages

SCHEMATIC DIAGRAM

R
VCC						VR
R=VCC-VR						RT=100k
IR
						(Optional trim facility)
Gnd
						Gnd

Figure 1:

This circuit will allow the reference to be trimmed over a wide range. The device is specified over a 65% trim range.

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ZRT100

ABSOLUTE MAXIMUM RATING

Reverse Current	30mA ø	Power Dissipation (Tamb=25°C)
Operating Temperature		TO18	300mW
A grade	-55°C to 125°C	SO8	625mW
C grade	0°C to 70°C	SOT223	2W
Storage Temperature		ø Above 25°C this figure should be linearly
TO18	-55 °C to 175 °C	derated to 6mA at 125°C
SO8, SOT223	-55 °C to 125 °C

TEMPERATURE DEPENDENT ELECTRICAL CHARACTERISTICS

SYMBOL	PARAMETER	INITIAL	GRADE A		GRADE C		UNITS
		VOLTAGE	-55°C TO 125°C		0°C TO 70°C
		TOLERANCE
			TYP	MAX	TYP	MAX
		%
DVR	Output voltage	1 & 2	27.0	90.0	10.8	34.4	mV
	change over relevant
	temperature range
	(See note (a))
TCVR	Output voltage	1 & 2	15.0	50.0	15.0	50.0	ppm/°C
	temperature
	coefficient (See note
	(b))

ELECTRICAL CHARACTERISTICS

( at Tamb =25°C and Trim pin o/c unless otherwise stated)

SYMBOL	PARAMETER	MIN.	TYP.	MAX.	UNITS	COMMENTS
VR	Output voltage					IR=500μA
	1% tolerance (A1,C1)	9.70	9.80	9.90	V
	2% tolerance (C2)	9.60	9.80	10.00
DVTRIM	Output voltage adjustment		65		%	RT=100kΩ
	range
TCDVTRIM	Change in TCVR with output		5.0		ppm/°C/%
	adjustment
IR	Operating current range	0.15		30	mA	See note (c)
ton	Turn-on time		400		μs	RL=1kΩ
toff	Turn-off time		0.3
enp-p	Output voltage noise (over		50		μV	Peak to peak
	the range 0.1 to 10Hz)					measurement
RS	Slope resistance		1.8	4.0	Ω	IR =
						0.5mA to 5mA
						See note (d)

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