AS432EC5VSB [ETC]
1.24V Precision Adjustable Shunt Reference; 1.24V精密可调并联型电压基准型号: | AS432EC5VSB |
厂家: | ETC |
描述: | 1.24V Precision Adjustable Shunt Reference |
文件: | 总7页 (文件大小:39K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
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
ANODE
N/C
REFERENCE
ANODE
ANODE
N/C
1
2
3
4
8
7
6
5
CATHODE
ANODE
REFERENCE
5L SOT-23 (5VS)
SOT-89 (S)
3L SOT-23 (3VS)
N/C
ANODE
CATHODE
CATHODE
N/C
ANODE
ANODE
REFERENCE
REFERENCE
CATHODE
REFERENCE
Ordering Information
AS432 A C 8D N
Circuit Type:
Packaging Option:
1.24V Precision Adjustable
Shunt Regulator
A
B
T
= Ammo Pack
= Bulk
= Tube
Bandgap Tolerance:
A = ±0.25%
C = ±0.5%
M
N
= 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%
8D
5VS
3VS
S
= 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
LP
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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
VKA
IAK
18
1
V
A
IKA
100
1
mA
mA
IREF
PD
775
750
mW
mW
mW
mW
°C
8L SOIC
SOT-89
1000
200
SOT-23/3L/5L
Junction Temperature
Storage Temperature
Lead Temperature (Soldering 10 sec.)
TJ
TSTG
TL
150
–65 to 150
300
°C
°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
θJA
θJC
Typical Derating
Cathode Voltage
Cathode Current
VKA
IK
VREF to 18
10
V
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
mA
SOT-89
SOT-23/5L 575°C/W
150°C/W
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AS432
1.24V Precision Adjustable Shunt Reference
Typical Performance Curves
* Calculating Average Temperature Coefficient (TC)
∆VREF (mV)
0
0
0
• TC in mV/°C =
∆TA
∆V
REF
∆T
∆V
REF
X 100
V
REF at 25°C
2000
0.2
–5
• TC in %/°C =
∆TA
∆V
REF
X 106
–10
V
REF at 25°C
0
15 30
45 60 75 90 105
• TC in ppm/°C =
∆TA
Temperature (°C)
0.021 mV/°C
0.008%/°C
8.0 ppm/°C
Test Circuits
V
V
V
IN
V
KA = V
V
V
KA
IN
IN
REF
KA
IK
IREF
IK
IK (OFF)
R1
)
IREF
(V
REF
R2
Figure 1a. Test Circuit 1
Figure 1b. Test Circuit 2
Figure 1c. Test Circuit 3
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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
0
175
V
KA = V
150
125
100
75
REF
Temperature Range –55 to 125°C
50
25
0
125°C
–25
–50
–55°C
25°C
–100
–200
–75
–100
–0.5
0
0.5
1.0
1.5
–2
–1
0
1
2
VKA – Cathode Voltage (V)
VKA – Cathode Voltage (V)
Figure 2
Figure 3
Off State Leakage
Reference Voltage vs Ambient Temperature
100
10
1.27
V
KA = 15 V
VKA = V
REF
IK = 10 mA
VREF = 0 V
1.26
1.25
1.24
1.23
VREF = 1.240 V at 25°C
1
0.1
1.22
1.21
1.20
1.19
0.01
–60
–30
0
30
60
90
120
–60
–30
0
30
60
90
120
TA – Ambient Temperature (°C)
TA – Ambient Temperature (°C)
Figure 4
Figure 5
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AS432
1.24V Precision Adjustable Shunt Reference
Typical Performance Curves
Reference Input Current
Reference Voltage Line Regulation
0
2.4
R1 = 10 kΩ
R2 = ∞
IK = 10 mA
–10
2.3
2.2
2.1
2.0
–40°C
–20
25°C
–30
75°C
–40
125°C
IK = 10 mA
Temperature Range: –55 to 125°C
–50
0
3
6
9
12
15
18
–60
–30
0
30
60
90
120
VKA – Cathode Voltage (V)
TA – Ambient Temperature (°C)
Figure 6
Figure 7
Noise Voltage
Low Frequency Dynamic Output Impedance
70
40
V
KA = V
REF
V
KA = V
REF
VKA = 1 to 100 mA
60
50
IK = 10 mA
TA = 25°C
f ≤ 1kHz
30
20
10
0
40
30
20
10
0
10
100
1 k
10 k
100 k
–60
–30
0
30
60
90
120
f – Frequency (Hz)
TA – Free Air Temperature (°C)
Figure 8
Figure 9
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1.24V Precision Adjustable Shunt Reference
AS432
Typical Performance Curves
Dynamic Output Impedance
100
TA = 25°C
IK = 1 to 100 mA
10
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
IK = 10 mA
80
70
60
OUT
IK
230 Ω
15 k
9 µF
50
40
30
8.25 k
GND
20
10
0
1 k
10 k
100 k
1 M
10 M
f – Frequency (Hz)
Figure 11
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AS432
1.24V Precision Adjustable Shunt Reference
Typical Performance Curves
Pulse Response
4
INPUT
MONITOR
220 Ω
3
OUT
Input
2
Output
50 Ω
fP = 100 kHz
1
0
GND
–1
0
1
2
3
4
5
6
7
8
9 10 11 12
t – Time (µs)
Figure 12
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