AS1004 ASTEC, AS1004 Datasheet

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AS1004

Manufacturer Part Number
AS1004
Description
Micropower Voltage Reference
Manufacturer
ASTEC
Datasheet

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Quantity
Price
Part Number:
AS1004A
Manufacturer:
TI/德州仪器
Quantity:
20 000
Part Number:
AS1004S
Manufacturer:
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Part Number:
AS1004S-1.2
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Features
Pin Configuration —
Ordering Information
Description
TO-92
8-Pin Plastic SOIC
SOT-89
© ASTEC Semiconductor
Low voltage reference
10 A turn-on current for
AS1004-1.2
20 A turn-on current for
AS1004-2.5
for AS1004-1.2
for AS1004-2.5
Guaranteed operation to 20 mA.
Over three orders of magnitude
of operating current!
Temperature performance
guaranteed
Very low dynamic impedance
4 mV (0.3 %) initial accuracy
20 mV (0.8 %) initial accuracy
TO-92 (LP)
ANODE
CATHODE
N/C
Temperature Range
Top view
0 to 70 C
0 to 70 C
0 to 70 C
ANODE
N/C
N/C
N/C
Description
The AS1004 is a two-terminal precision band-gap voltage
reference with a low turn-on current of 10 A.
Emulating a 1.235 V zener diode, the AS1004 operates more
than three orders of magnitude of output current with minute
output impedance and guaranteed stability. With an initial
tolerance of
mance, it is ideal for precision instrumentation, especially in
low power applications. Being a low-voltage reference, the
AS1004 is also well-suited as a reference for low-voltage
power supply applications, especially in power supplies
intended for low-voltage logic systems, laptop computers
and other portable or battery operated equipment.
The AS1004 is pin-for-pin compatible with the LT1004 and
the LM385 and offers improved specifications over both the
LM385 and the MP5010. It is also available as a 2.5 V
reference with a guaranteed start-up current of 20 A.
1
2
3
4
SOIC (D)
29
AS1004-1.2LP
AS1004-1.2D
AS1004-1.2S
Micropower Voltage Reference
4 mV and guaranteed temperature perfor-
8
7
6
5
CATHODE
N/C
CATHODE
ANODE
Order Codes
AS1004
SOT-89 (S)
AS1004-2.5LP
AS1004-2.5D
AS1004-2.5S
N/C
CATHODE
ANODE

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AS1004 Summary of contents

Page 1

... ASTEC Semiconductor Description The AS1004 is a two-terminal precision band-gap voltage reference with a low turn-on current Emulating a 1.235 V zener diode, the AS1004 operates more than three orders of magnitude of output current with minute output impedance and guaranteed stability. With an initial tolerance of mance ideal for precision instrumentation, especially in low power applications ...

Page 2

... AS1004 Simplified Schematic Q13 R10 Q11 R11 Q10 R12 Q9 Q14 Absolute Maximum Ratings Parameter Reverse Breakdown Current Forward Current Continuous Power Dissipation TO-92 8LSOIC SOT-89 Maximum Junction Temp Storage Temperature Lead Temperature, Soldering 10 Seconds Recommended Conditions Parameter Symbol Rating Cathode Current ...

Page 3

... Reverse Breakdown Voltage Change With Current Reverse Dynamic Impedance Z Z Wide Band Noise e n Long Term Stability Typical Performance Curves Calculating Average Temperature Coefficient for the AS1004-1.2 Reference REF T -5 5000 0.5 - Temperature (°C) 0.025 mV/ °C 0.002 %/ ° ...

Page 4

... AS1004 Typical Performance Curves Calculating Average Temperature Coefficient for the AS1004-2.5 Reference REF T -5 5000 0.5 - Temperature (°C) 0.046 mV/°C 0.004 %/ °C 37 ppm/ °C Average Temperature Coefficient = Figure 3 AS1004-1.2 Reverse Operating Characteristics 100 T = –55° 125° C ...

Page 5

... Micropower Voltage Reference Typical Performance Curves AS1004-1.2 Change in Reference Voltage versus Reverse Current –55° 125° –4 0.01 0 – Reverse Current (mA) R Figure 7 AS1004-1.2 Transient Response 1.5 OUTPUT 0 INPUT – Time ( s) ...

Page 6

... Frequency (kHz) Figure 11 Forward Characteristics 1 0.8 0.4 0 0.01 0 Forward Current (mA) F Figure 13 ASTEC Semiconductor Micropower Voltage Reference AS1004-2.5 Reverse Dynamic Impedance 100 25° 100 10 1 0.1 100 1 k 0.01 0.1 Low Frequency Reverse Dynamic Impedance 100 10 1 0.1 0.01 10 ...

Page 7

... ASTEC Semiconductor 2.5V Reference V IN 100 k OUT AS1004-2.5 Figure 16 High Stability 5V Regulator OUT + + Micropower 10V Reference 1 M 150 pF AS1004-1.2 35 AS1004 Low Noise Reference V IN 100 k 22 OUT AS1004-2 Figure LM338 OUT IN OUT ADJ 976 , 1 AS1004-2.5 324 , 1 Figure 19 V ...

Page 8

... AS1004 Notes ASTEC Semiconductor Micropower Voltage Reference 36 ...

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