AS1431DR4S7 [ETC]

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


型号：	AS1431DR4S7
厂家：	ETC
描述：	Precision Adjustable Shunt Reference 精密可调并联型电压基准输出元件
文件：	总8页 (文件大小：85K)
中文：	中文翻译
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AS1431

Precision Adjustable Shunt Reference

SEMICONDUCTOR

Features

Description

Temperature-compensated: 30 ppm/¡C

Trimmed 0.4% bandgap reference

Internal amplifier with 150 mA capability

Temperature range: Extended to Ð55

to125¡C

Low frequency dynamic output

impedance: < 150 m½

The AS1431 is a three-terminal adjustable shunt regulator providing a

highly accurate 0.4% bandgap reference. The adjustable shunt regulator

is ideal for a wide variety of linear applications that can be implemented

using external components to obtain adjustable currents and voltages.

In the standard shunt configuration, the combination of low temperature

coefficient (TC), sharp turn-on characteristics, low output impedance and

programmable output voltage make this precision reference a perfect

zener diode replacement.

Low output noise

Robust ESD protection

The AS1431 is characterized to operate over the full automotive tem-

perature range of Ð55 to 125¡C and is now available in the SOT-23 (5L)

package.

Pin Configuration Ñ Top view

TO-92 (LP)

SOIC (D)

CATHODE

ANODE

N/C

REFERENCE

ANODE

N/C

CATHODE

ANODE

REFERENCE

SOT-89 (S)

SOT-23/5L (DBV)

CATHODE

ANODE

N/C

REFERENCE

N/C

ANODE

CATHODE

REFERENCE

Ordering Information

AS1431 D R4 D 7

Circuit Type:

Packaging Option:

Precision Adjustable

Shunt Regulator

= Ammo Pack

= Bulk

= Tube

Temperature Range:

D = –55°C to +125°C

= Tape and Reel (7" Reel Dia)

= Tape and Reel (13" Reel Dia)

Bandgap Tolerance:

Package Style:

R4 = ±0.4%

= SOIC

DBV

= SOT-23/5L

= TO-92

= SOT-89

ASTEC Semiconductor

AS1431

Precision Adjustable Shunt Reference

Functional Block Diagram

CATHODE (K)

REFERENCE

(R)

2.5 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 Dissipation at 25¡C

TO-92

V_KA

I_AK

I_KA

250

I_REF

P_D

775

750

¡C

8L SOIC

SOT-89

1000

200

SOT-23/5L

Junction Temperature

Storage Temperature

Lead Temperature Soldering 10 Seconds

T_J

T_STG

T_L

150

Ð65 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 20

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

ASTEC Semiconductor

Precision Adjustable Shunt Reference

AS1431

Electrical Characteristics

Electrical Characteristics are guaranteed over full junction temperature range (Ð55 to 125¡C). Ambient temperature must be derated

based on power dissipation and package thermal characteristics. The conditions are: V_KA= V_REFand I_K= 10 mA unless otherwise stated.

Parameter

Symbol

Test Condition

T_A= 25¡C

Min.

2.490

2.470

Typ.

Max.

2.510

2.530

0.16

Unit

Circuit

Reference Voltage

V_REF

2.500

Over temp.

ÆV_REFwith Temp*

0.06

Ð1.1

mV/¡C

mV/V

Ratio of Change in V_REFto

Cathode Voltage

ÆV_REF

ÆV_K= 3 V to 36 V

Ð2

Reference Input Current

I_REFTemp Deviation

Min I_Kfor Regulation

Off State Leakage

I_REF

ÆI_REF

I_K(min)

I_K(off)

R₁= 10 k ½; R₂= °

Over temp.

0.7

0.4

1.9

1.2

µA

0.4

V_REF= 0 V,

V_KA= 36 V

0.04

500

Dynamic Output Impedance

Z_KA

f ² 1 kHz

0.15

0.2

I_K= 1 to 100 mA

*Calculating Average Temperature Coefficient (TC)

Average Temperature Coefficient

∆V_REF(mV)

∆T_A

• TC in mV/°C =

∆V

REF

∆V

REF

–10

–20

X 100

∆T

_REFat 25°C

5000

0.5

• TC in %/°C =

∆T_A

∆V

REF

X 10⁶

–55 –25

25 50

75 100 125

V_REFat 25°C

Temperature (°C)

• TC in ppm/°C =

∆T_A

0.06 mV/°C

0.002%/°C

24 ppm/°C

ASTEC Semiconductor

AS1431

Precision Adjustable Shunt Reference

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

ASTEC Semiconductor

Precision Adjustable Shunt Reference

AS1431

Typical Performance Curves

Low Current Operating Characteristics

High Current Operating Characteristics

150

125

100

900

_KA= V

REF

800

700

Temperature Range: –55 to 125°C

600

500

400

125°C

300

200

100

25°C

–55°C

–25

–50

–75

–100

–200

–100

–2

–1

–1.0

1.0

2.0

3.0

V_KA– Cathode Voltage (V)

Figure 2

Figure 3

Off State Leakage

Reference Voltage vs Ambient Temperature

100

2.53

_KA= V

REF

_KA= 36 V

2.52

2.51

I_K= 10 mA

V_REF= 0 V

2.50

2.49

V_REF= 2.500 V at 25°C

2.48

2.47

0.1

0.01

2.46

2.45

–60

–30

120

–60

–30

120

T_A– Ambient Temperature (°C)

Figure 4

Figure 5

ASTEC Semiconductor

AS1431

Precision Adjustable Shunt Reference

Typical Performance Curves

Reference Input Current

Reference Voltage Line Regulation

3.0

R1 = 10 kΩ

R2 = ∞

I_K=10 mA

2.5

2.0

1.5

–10

–55°C

0°C

–20

25°C

75°C

–30

1.0

0.5

125°C

–40

–50

I_K= 10 mA

Temperature Range: –55 to 125°C

–60

–30

120

12 15

18 21 24 27 30

V_KA– Cathode Voltage (V)

T_A– Ambient Temperature (°C)

Figure 6

Figure 7

Noise Voltage

Low Frequency Dynamic Output Impedance

0.150

_KA= V

REF

I_KA= 1 to 100 mA

f ≤ 1 kHz

I_K= 10 mA

T_A= 25°C

0.125

0.100

0.075

0.050

0.025

0.0

100

1 k

10 k

100 k

–60

–30

120

f – Frequency (Hz)

T_A– Free Air Temperature

Figure 8

Figure 9

ASTEC Semiconductor

Precision Adjustable Shunt Reference

AS1431

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

ASTEC Semiconductor

AS1431

Precision Adjustable Shunt Reference

Typical Performance Curves

Pulse Response

Input

INPUT

MONITOR

220 Ω

OUT

Output

50 Ω

fp = 100 kHz

GND

–0

9 10 11 12

t – Time (ms)

Figure 12

Stability Boundary Conditions

100

A: V_KA= V

REF

B: V_KA= 5 V at I_K= 10 mA

C: V_KA= 10 V at I_K= 10 mA

D: V_KA= 15 V at I_K= 10 mA

150 Ω

I_K

C_L

Stability

Region

10 K

10⁰

= 25°C

10¹

10²

10³

10⁴

10⁵

10⁶

10⁷

C_L– Load Capacitance (pF)

Figure 13

ASTEC Semiconductor

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