Zetex ZRT100A1, ZRT100C1, ZRT100C2, ZRT100GA1, ZRT100GC1 Datasheet

9.8V LOW POWER
PRECISION REFERENCE SOURCE

ISSUE 1 - OCTOBER 1995

ZRT100

DEVICE DESCRIPTION

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.

SCHEMATIC DIAGRAM

R

CC

V

R

V

FEATURES

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

R=VCC-V

G

Figure 1:

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

R

R

I

nd

RT=100k

(Optional trim facility)

nd

G

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ZRT100

ABSOLUTE MAXIMUM RATING

Reverse Current 30mA ø
Operating Temperature

A grade -55°C to 125°C
C grade 0°C to 70°C

Storage Temperature

TO18 -55 °C to 175 °C
SO8, SOT223 -55 °C to 125 °C

TEMPERATURE DEPENDENT ELECTRICAL CHARACTERISTICS

SYMBOL PARAMETER

DV

R

Output voltage
change over relevant
temperature range
(See note (a))

T

CVR

Output voltage
temperature
coefficient (See note
(b))

INITIAL

VOLTAGE

TOLERANCE

%

1 & 2 27.0 90.0 10.8 34.4 mV

1 & 2 15.0 50.0 15.0 50.0 ppm/°C

ELECTRICAL CHARACTERISTICS
( at T

SYMBOL PARAMETER

V

DV

T

I

R

t

on

t

off

e

R

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

amb

R

Output voltage
1% tolerance (A1,C1)
2% tolerance (C2)

TRIM

Output voltage adjustment
range

CDVTRIM

Change in TCVR with output
adjustment

Operating current range 0.15 30 mA See note (c)

Turn-on time
Turn-off time

np-p

Output voltage noise (over
the range 0.1 to 10Hz)

S

Slope resistance 1.8 4.0

Power Dissipation (T

TO18 300mW
SO8 625mW
SOT223 2W
ø Above 25°C this figure should be linearly

derated to 6mA at 125°C

GRADE A

-55°C TO 125°C

0°C TO 70°C

TYP MAX TYP MAX

MIN. TYP.

9.70

9.60

9.80

9.80

MAX. UNITS

9.90

V

10.00

65%

5.0 ppm/°C/%

400

µsR

0.3

50

µV

Ω

=25°C)

amb

GRADE C

UNITS

COMMENTS

I

=500µA

R

=100kΩ

R

T

=1kΩ

L

Peak to peak
measurement

IR =

0.5mA to 5mA
See note (d)

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