AS432EBSM [ETC]

1.24V Precision Adjustable Shunt Reference; 1.24V精密可调并联型电压基准


型号：	AS432EBSM
厂家：	ETC
描述：	1.24V Precision Adjustable Shunt Reference 1.24V精密可调并联型电压基准
文件：	总7页 (文件大小：39K)
中文：	中文翻译
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AS432

SEMICONDUCTOR

1.24V Precision Adjustable Shunt Reference

Features

Description

•

Temperature-compensated: 50 ppm/°C

0.25% to 2.0% bandgap offered

Internal amplifier with 150 mA capability

Multiple temperature ranges

The AS432 is a three terminal adjustable shunt regulator utilizing an

accurate 1.24V bandgap reference. The AS432 is functionally similar to

an AS431 except for its lower reference voltage, making it usable in a

wide variety of low voltage applications.

Because of its robust bipolar technology, the AS432 handles a wide

range of current, and holds off more than 18V so its use is not limited to

low power, low voltage systems. Significant care has been taken to pro-

vide adequate AC bandwidth to allow the AS432 as an amplifier in con-

trol systems and power electronics.

Low frequency dynamic output

impedance: < 150 mΩ

•

Low output noise

Pin Configuration — ^{Top view}

TO-92 (LP)

8L SOIC (8D)

CATHODE

ANODE

N/C

REFERENCE

ANODE

N/C

CATHODE

ANODE

REFERENCE

5L SOT-23 (5VS)

SOT-89 (S)

3L SOT-23 (3VS)

N/C

ANODE

CATHODE

N/C

ANODE

REFERENCE

CATHODE

REFERENCE

Ordering Information

AS432 A C 8D N

Circuit Type:

Packaging Option:

1.24V Precision Adjustable

Shunt Regulator

= Ammo Pack

= Bulk

= Tube

Bandgap Tolerance:

A = ±0.25%

C = ±0.5%

= Tape and Reel (7" Reel Dia, SOT-23 Only)

= Tape and Reel (13" Reel Dia)

D = ±1.0%

Package Style:

= 8 Pin, Plastic SOIC

E = ±2.0%

5VS

3VS

= 5 Pin, SOT-23

= 3 Pin, SOT-23

= SOT-89

Temperature Range:

A = 0°C to 70°C

= TO-92

B = 0°C to 105°C

C = –40°C to 85°C

F = –55°C to 125°C

www.ptcc.com.tw

AS432

1.24V Precision Adjustable Shunt Reference

Functional Block Diagram

CATHODE (K)

REFERENCE

(R)

–

1.24 V

ANODE (A)

Absolute Maximum Ratings

Parameter

Symbol

Rating

Units

Cathode-Anode Reverse Breakdown

Anode-Cathode Forward Current

Operating Cathode Current

Reference Input Current

Continuous Power at 25°C

TO-92

V_KA

I_AK

I_KA

100

I_REF

P_D

775

750

°C

8L SOIC

SOT-89

1000

200

SOT-23/3L/5L

Junction Temperature

Storage Temperature

Lead Temperature (Soldering 10 sec.)

T_J

T_STG

T_L

150

–65 to 150

300

°C

Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a

stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sec-

tions of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.

Recommended Conditions

Typical Thermal Resistances

Parameter

Symbol

Rating

Unit

Package

θ_JA

θ_JC

Typical Derating

Cathode Voltage

Cathode Current

V_KA

I_K

V_REFto 18

TO-92

SOIC

160°C/W

175°C/W

110°C/W

80°C/W

45°C/W

8°C/W

6.3 mW/°C

5.7 mW/°C

9.1 mW/°C

1.7 mW/°C

SOT-89

SOT-23/5L 575°C/W

150°C/W

www.ptcc.com.tw

AS432

1.24V Precision Adjustable Shunt Reference

Typical Performance Curves

* Calculating Average Temperature Coefficient (TC)

∆V_REF(mV)

• TC in mV/°C =

∆T_A

∆V

REF

∆T

∆V

REF

X 100

_REFat 25°C

2000

0.2

–5

• TC in %/°C =

∆T_A

∆V

REF

X 10⁶

–10

_REFat 25°C

15 30

45 60 75 90 105

• TC in ppm/°C =

∆T_A

Temperature (°C)

0.021 mV/°C

0.008%/°C

8.0 ppm/°C

Test Circuits

_KA= V

REF

I_K

I_REF

I_K

I_{K (OFF)}

R₁

)

I_REF

REF

R₂

Figure 1a. Test Circuit 1

Figure 1b. Test Circuit 2

Figure 1c. Test Circuit 3

www.ptcc.com.tw

1.24V Precision Adjustable Shunt Reference

AS432

Typical Performance Curves

Low Current Operating Characteristics

High Current Operating Characteristics

900

800

700

600

500

400

300

200

100

175

_KA= V

150

125

100

REF

Temperature Range –55 to 125°C

125°C

–25

–50

–55°C

25°C

–100

–200

–75

–100

–0.5

0.5

1.0

1.5

–2

–1

V_KA– Cathode Voltage (V)

Figure 2

Figure 3

Off State Leakage

Reference Voltage vs Ambient Temperature

100

1.27

_KA= 15 V

V_KA= V

REF

I_K= 10 mA

V_REF= 0 V

1.26

1.25

1.24

1.23

V_REF= 1.240 V at 25°C

0.1

1.22

1.21

1.20

1.19

0.01

–60

–30

120

–60

–30

120

T_A– Ambient Temperature (°C)

Figure 4

Figure 5

www.ptcc.com.tw

AS432

1.24V Precision Adjustable Shunt Reference

Typical Performance Curves

Reference Input Current

Reference Voltage Line Regulation

2.4

R1 = 10 kΩ

R2 = ∞

I_K= 10 mA

–10

2.3

2.2

2.1

2.0

–40°C

–20

25°C

–30

75°C

–40

125°C

I_K= 10 mA

Temperature Range: –55 to 125°C

–50

–60

–30

120

V_KA– Cathode Voltage (V)

T_A– Ambient Temperature (°C)

Figure 6

Figure 7

Noise Voltage

Low Frequency Dynamic Output Impedance

_KA= V

REF

_KA= V

REF

V_KA= 1 to 100 mA

I_K= 10 mA

T_A= 25°C

f ≤ 1kHz

100

1 k

10 k

100 k

–60

–30

120

f – Frequency (Hz)

T_A– Free Air Temperature (°C)

Figure 8

Figure 9

www.ptcc.com.tw

1.24V Precision Adjustable Shunt Reference

AS432

Typical Performance Curves

Dynamic Output Impedance

100

T_A= 25°C

I_K= 1 to 100 mA

1.0

0.1

0.01

1 k

10 k

100 k

1 M

10 M

f – Frequency (Hz)

Figure 10

Small Signal Voltage Gain vs. Frequency

Temperature Range: –55° to 125°C

I_K= 10 mA

OUT

I_K

230 Ω

15 k

9 µF

8.25 k

GND

1 k

10 k

100 k

1 M

10 M

f – Frequency (Hz)

Figure 11

www.ptcc.com.tw

AS432

1.24V Precision Adjustable Shunt Reference

Typical Performance Curves

Pulse Response

INPUT

MONITOR

220 Ω

OUT

Input

Output

50 Ω

f_P= 100 kHz

GND

–1

9 10 11 12

t – Time (µs)

Figure 12

www.ptcc.com.tw

AS432EBSM [ETC]

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