AS2431AB3VSM [ETC]

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


型号：	AS2431AB3VSM
厂家：	ETC
描述：	Precision Adjustable Shunt Reference 精密可调并联型电压基准
文件：	总7页 (文件大小：41K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

AS2431

SEMICONDUCTOR

Precision Adjustable Shunt Reference

Features

Description

•

Temperature-compensated: 15 ppm/°C

The AS2431 is a three-terminal adjustable shunt regulator providing a

highly accurate 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.

Trimmed bandgap reference

Internal amplifier with 100 mA capability

Multiple temperature ranges

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 an

excellent error amplifier.

Low frequency dynamic output

impedance: < 450 mΩ

•

Low output noise

The AS2431 is a direct replacement for the AS431 in low voltage, low

current applications. It is also available in the very small footprint SOT-

23.

Pin Configuration – Top View

TO-92 (LP)

8L SOIC (8D)

CATHODE

ANODE

N/C

REFERENCE

ANODE

N/C

CATHODE

ANODE

REFERENCE

SOT-89 (S)

3L SOT-23 (3VS)

CATHODE

ANODE

CATHODE

ANODE

REFERENCE

Ordering Information

AS2431 A C 8D N

Packaging Option:

Circuit Type:

= Ammo Pack

= Bulk

Precision Adjustable

Shunt Regulator

= Tube

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

= Tape and Reel (13" Reel Dia)

Bandgap Tolerance:

A = ±0.25%

C = ±0.5%

Package Style:

D = ±1.0%

E = ±2.0%

8D = 8 Pin, Plastic SOIC

LP = TO-92

Temperature Range:

S = SOT-89

3VS = 3 Pin, SOT-23

0°C to 70°C

0°C to 105°C

–40°C to +85°C

–55°C to +125°C

www.ptcc.com.tw

AS2431

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

100

I_REF

P_D

775

750

°C

8L SOIC

SOT-89

1000

200

3L SOT-23

Junction Temperature

Storage Temperature

Lead Temp, Soldering 10 Seconds

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

AS2431

Precision Adjustable Shunt Reference

Average Temperature Coefficient

∆V_REF(mV)

• TC in mV/°C =

∆T_A

∆V

REF

∆V

∆T

REF

X 100

_REFat 25°C

–10

–20

• TC in %/°C =

5000

0.5

∆T_A

∆V

REF

X 10⁶

_REFat 25°C

15 30

45 60 75 90 105

• TC in ppm/°C =

∆T_A

Temperature (°C)

0.07 mV/°C

0.003%/°C

27 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

Precision Adjustable Shunt Reference

AS2431

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

3.53

_KA= V

REF

_KA= 18 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

2.46

2.45

0.01

–60

–30

120

–60

–30

120

T_A– Ambient Temperature (°C)

– Ambient Temperature (°C)

Figure 4

Figure 5

www.ptcc.com.tw

AS2431

Precision Adjustable Shunt Reference

Typical Performance Curves

Reference Input Current

Reference Voltage Line Regulation

3.0

R1 = 10 kΩ

R2 = ∞

–30°C

2.5

2.0

1.5

I_K=10 mA

–5

–10

25°C

–15

1.0

0.5

75°C

–20

125°C

I_K= 10 mA

Temperature Range: –55 to 125°C

–25

–60

–30

120

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

www.ptcc.com.tw

Precision Adjustable Shunt Reference

AS2431

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

AS2431

Precision Adjustable Shunt Reference

Typical Performance Curves

Pulse Response

Input

INPUT

MONITOR

220 Ω

OUT

Output

50 Ω

f_P= 100 kHz

GND

–1

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

T_A= 25°C

10⁰

10¹

10²10³

10⁴

10⁵

10⁶

10⁷

C_L– Load Capacitance (pF)

Figure 13

www.ptcc.com.tw

相关型号：