ST TS2431 User Manual

查询TS2431供应商

TS2431

PROGRAMMABLE SHUNT VOLTAGE REFERENCE

■ ADJUSTABLE OUTPUT VOLTAGE

2.5 to 24V

■ SEVERAL PRECISION @ 25°C

±2%, ±1% and ±0.5%

■ SINK CURRENT CAPABILITY

1 to 100mA

■ INDUSTRIAL TEMPERAT URE RANGE:

-40 to +105°C

■ PERFORMANCES COMPATIBL E WI TH

INDUSTRY STANDARD TL431

DESCRIPTION

The TS2431 is a programmable shunt voltage
reference with guaranteed temperature stability
over the entire temperature range of operation
(-40 to +105°C). The output voltage may be set to
any value between 2.5V and 24V with an external
resistor bridge.

Available in SOT23-3 s urface mount package, it
can be designed in applications where space
saving is a critical issue.

APPLICATION

L

SOT23-3L

(Plastic Micropackage)

PIN CONNECTIONS (top view)

■ Computers

■ Instrumentation

■ Battery chargers

■ Switch Mode Power Supply

■ Battery operated equipments

ORDER CODE

Precision

2% TS2431ILT L285
1% TS2431AILT L286

0.5% TS2431BILT L287

Single temperature range: -40 to +105°C

LT = Tiny Package (SOT23-3) - only available in Tape & Reel (LT)

February 2002

Part Number

in SOT23-3

SOT23

Marking

Cathode

Reference

1

3

TS2431

2

SOT23-3

Anode

1/6

TS2431

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

Vka Cathode to Anode voltage 25 V

I

Reverse Breakdown Current -100 to +150 mA

K

I

T

ESD

T

LEAD

1. Pd has been ca l culated wi th Ta mb = 25°C, Tjunction =150°C and Rth j a = 340°C/W for the SOT23-3 package

OPERATING CONDITIONS

Symbol Parameter Value Unit

V

T

1. Maximum power dissipation must be st ri ctly obser ved to avoid t he component destruction.

Reference input current range -0.05 to +10 mA

REF

P

Power Dissipation

d

Storage Temperature -65 to +150 °C

std

1)

SOT23-3

360 mW

Human Body Model (HBM) 2 kV
Machine Model (MM) 200 V
Lead Temperatue (soldering, 10 seconds) 260 °C

to 24

Cathode to Anode voltage

KA

I

Cathode operating current

K

Operating Free Air Temperature Range -40 to +105 °C

oper

1)

V

REF

1 to 100 mA

V

ELECTRICAL CHARACTERISTICS

T

AMBIENT

Symbol Parameter Test Condition Min. Typ. Max. Unit

V

|∆

I

∆Vref

---------------

∆Vk

|∆

= 25°C (unless otherwise specified)

Reference input Voltage VK=V

REF

Reference input Voltage deviation over
temperature, V

V

T

KMIN

I

REF

I

REF

I

OFF

Z

|

KA

E

|

REF

(note 1,2)
Temperature coefficient (note 2) -40°C < T < +105°C 50 100 ppm/°C

C

Minimum Operating Current

Ratio of change in reference input
voltage to change in catho de to anode
voltage

Reference input current
I

=10mA, R1=10K

K

Reference input current deviation

|

I

=10mA, R1=10K

K

Off-state cathode current

|

Reverse dynamic impedance

Wide Band Noise

N

, IK=10mA

K=VREF

R2=+ (note 3)

Ω,

R2=+ (note 3)

Ω,

, IK=10mA

REF

2.5
TS2431 (2%) 2.45 2.55
TS2431A (1%) 2.475 2.525
TS2431B (0.5%) 2.488 2.512
0°C < T < +70°C 10 20

-40°C < T < +105°C 20 35

T = 25°C 0.3 0.8

-40°C < T < +105°C 1

I

=10mA

K

Vka= 24 to 2.5V

0.3 2 mV/V

T=25°C 0.5 2.5

∞
∞

-40°C < T < +105°C 3

-40°C < T < +105°C 0.4 1.2 µA

=24V, V

V

K

V

K=VREF

I

∆

=1 to 50mA, f<10kHz

K

Ik = 10mA
10Hz < f < 10kHz

REF

=GND

10 500 nA

0.5 0.75

300 nV/√Hz

V

mV-40°C < T < +85°C 17 30

mA

µA

Ω

Note 1: Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation and by design.
Note 2:
Note 3: Refer to figure "Test circuit for Vka>Vref" page 4

V

|∆

| is defined as the difference between the maximum and minimum values of V

REF

obtained over the full temperature range

REF

2/6