Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
Advanced
AMS4040
Monolithic
MICROPOWER SHUNT VOLTAGE REFERENCE
Systems
FEATURES
APPLICATIONS
Tight Output Voltage Tolerance
Battery Powered Systems
Low Output Noise
Instrumentation
Operating Current 250
A to 100mA
Energy Management
Low Dynamic Impedance
Automotive
Low Temperature Coefficient
Precision Audio Components
Available in the sub-miniature SOT-23 Package
Product Testing
1.2V Device ( AMS4041) also available
Data Acquisition Systems
GENERAL DESCRIPTION
The AMS4040 is a two-terminal micropower band-gap voltage reference diode featuring a very low dynamic impedance and
good temperature coefficient, operating over a 250
A to 100mA current range. On-chip trimming is used to provide tight
voltage tolerance. Since the AMS4040 band-gap reference uses only transistors and resistors, low noise and good long term
stability result. The wide dynamic operating range allows its use with widely varying supplies with excellent regulation. The
extremely low power drain of the AMS4040 makes these reference diodes useful for micropower circuitry. These voltage
references can be used to make portable meters, regulators or general purpose analog circuitry with battery life approaching
shelf life.
The AMS4040 is operational in the full industrial temperature range of -40
C to +85
and is available in small space saving
TO-92, SO-8, SOT-89 and SOT-23 packages.
ORDERING INFORMATION
:
TOL.
PACKAGE TYPE
OPERATING
TO-92
8 LEAD SOIC
SOT-89
3 LEAD SOT-23
TEMP. RANGE
0.25%
AMS4040AN
AMS4040AS
AMS4040AL
AMS4040AM
-40 to +85
C
0.5%
AMS4040BN
AMS4040BS
AMS4040BL
AMS4040BM
-40 to +85
C
1.0%
AMS4040CN
AMS4040CS
AMS4040CL
AMS4040CM
-40 to +85
C
PIN CONNECTIONS
TO-92
8L SOIC
SOT-89
3L SOT-23
Plastic Package (N)
SO Package (S)
(L)
(M)
1
2
3
-
+
N/C
N/C
N/C
N/C
N/C
N/C
N/C
+
-
1
2
8
4
3
7
5
6
1
2
3
+
-
3 *
2
1
*This pin must be left floating
or connected to pin 2
Bottom View
Top View
Top View
Top View
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS4040
ABSOLUTE MAXIMUM RATINGS (Note 1)
Reverse Current
100mA
Internal Power Dissipation (P
D
)
Forward Current
10mA
TO-92 Package
0.78W
Storage temperature
-65
C to +150
C
SO-8 Package
0.71W
Lead Temperature
SOT-89 Package
0.91W
TO-92 package (Soldering 10 sec.)
265
C
SOT-23 Package
0.28W
SO-8 and SOT-23 packages:
Thermal Resistance (
JA
)
Vapor phase (60 sec)
215
C
TO-92 Package
160
C/W
Infrared (15 sec.)
220
C
SO-8 Package
175
C/W
SOT-89 package (Soldering 10 sec.)
265
C
SOT-89 Package
110
C/W
SOT-23 Package
410
C/W
Note1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. For guaranteed specifications and test conditions, see the
Electrical Characteristics
.
The guaranteed specifications apply only for the test conditions listed.
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at I
R
=100
A and T
A
= +25C unless otherwise specified.
Parameter
Conditions
AMS4040A
Min Typ Max
AMS4040B
Min Typ Max
AMS4040C
Min Typ Max
Units
Reverse Breakdown
Voltage
2.494
2.500
2.506
2.488
2.500
2.512
2.475
2.500
2.525
V
Deviation of Reverse
Breakdown Voltage over
Temperature
T
A
= Full Range
8.0
17
8.0
17
8.0
25
mV
Reverse Breakdown
Voltage Change with
I
RMIN
I
R
1mA
0.3
0.8
1.0
0.3
0.8
1.0
0.3
0.8
1.0
mV
Operating Current
Change
1mA
I
R
15mA
2.5
6.0
8.0
2.5
6.0
8.0
2.5
6.0
8.0
mV
Reverse Breakdown
Voltage Long Term
Stability
T
A
=25C.1C
T = 1000 Hr
120
120
120
ppm
Wide Band Noise
10HZ
f
10kHz
35
35
35
V
rms
Reverse Dynamic
Impedance
I
R
= 1mA, f = 120Hz,
I
AC
= 0.1I
R
0.25
0.5
0.25
0.5
0.25
0.5
Minimum Operating
Current
80
2500
80
250
80
250
A
Parameters identified with boldface type apply at temperature extremes. All other numbers apply at T
A
= T
J
= 25C.
TYPICAL APPLICATIONS
Shunt Regulator
AMS4040-2.5
I
Q
I
Q
+ I
L
I
L
R
S
V
R
V
S
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS4040
TYPICAL APPLICATIONS
Precision 1
A to 1mA Current Sources
8
4
3
2
+
-
1/2
LMC6062
1
AMS4040-2.5
R2
R1
20k
-15V
-1.0V TO -12V
I
OUT
*
I
OUT
=2.5V/R2
8
4
3
2
+
-
1/2
LMC6062
1
R2
R1
20k
12V
1.0V TO 12V
I
OUT
*
AMS4040-2.5
Precision
2.500V Reference
AMS4040-2.5
904
, 1%
+5V 5%
+
-
1/2
LMC6062
47
k
, 0.1%
0.1
F
+5V
+2.500V
-2.500V
47
k
, 0.1%
0.1
F
-5V
START-UP CHARACTERISTICS
AMS4040-2.5
V
R
R
S
V
IN
1Hz rate
Test Circuit
V
R
(V)
V
IN
(V)
5
0
3
2
1
0
0
20
40
60
80
R
S
= 30 k
AMS4040-2.5
T
J
= 25C
RESPONSE TIME (
s)
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS4040
TYPICAL PERFORMANCE CHARACTERISTICS
-40 -20
0
20
40
60
80
-0.5
+0.5
0
100
-0.1
-0.2
-0.3
-0.4
+0.4
+0.3
+0.2
+0.1
Temperature Drift for Different
Average Temperature Coefficient
TEMPERATURE ( C)
V
R
CHANGE (%)
I
R
= 150
A
0.1
1
10
100
1k
100
1k
10k
100k
Ouput Impedance vs Frequency
FREQUENCY (Hz)
NOISE (mV/
Hz)
1M
0.1
1
10
100
1k
100
1k
10k
100k
FREQUENCY (Hz)
1M
1
10
100
1k
10k
0.1
5.0
1.0
Noise Voltage vs Frequency
100k
FREQUENCY (Hz)
IMPEDANCE (
)
0.2
10
2.0
T
J
=25 C,
I
R
= 0.1I
R
I
R
= I
RMIN
+100
A
IMPEDANCE (
)
I
R
= 200
A
T
J
=25 C
0.5
Ouput Impedance vs Frequency
+12ppm/ C
-51ppm/ C
-22ppm/ C
I
R
= 100 mA
T
J
=25 C,
I
R
= 0.1I
R
C
L
= 0
C
L
= 1
F
TANTALUM
C
L
= 1
F
TANTALUM
C
L
= 0
XC
L
XC
L
0
0.5
1.0
2.0
2.5
0
80
40
Reverse Characteristics and
Minimum Operating Current
REVERSE VOLTAGE (V)
REVERSE CURRENT (
A)
20
120
100
T
J
=25 C
60
1.5
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS4040
PACKAGE DIMENSIONS
inches (millimeters) unless otherwise noted.
3 LEAD TO-92 PLASTIC PACKAGE (N)
8 LEAD SOIC PLASTIC PACKAGE (S)
0.1400.010
(3.5560.127)
0.0600.010
(1.5240.254)
0.0150.002
(0.3810.051)
0.0160.003
(0.4060.076)
0.0500.005
(1.2700.127)
0.0600.005
(1.5240.127)
DIA
0.1800.005
(4.5720.127)
0.1800.005
(4.5720.127)
0.050
(1.270)
MAX
0.500
(12.70)
MIN
UNCONTROLLED
LEAD DIMENSIONS
10
NOM
5 NOM
N (TO-92 ) AMS DRW# 042391
0.90
(2.286)
NOM
0-8 TYP
0.010-0.020
(0.254-0.508)
S (SO-8 ) AMS DRW# 042293
x 45
0.016-0.050
(0.406-1.270)
0.008-0.010
(0.203-0.254)
0.004-0.010
(0.101-0.254)
0.014-0.019
(0.355-0.483)
0.053-0.069
(1.346-1.752)
0.050
(1.270)
TYP
0.150-0.157**
(3.810-3.988)
0.228-0.244
(5.791-6.197)
0.189-0.197*
(4.801-5.004)
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
1
2
3
4
8
7
6
5
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS4040
PACKAGE DIMENSIONS
inches (millimeters) unless otherwise noted (Continued).
SOT-89 PLASTIC PACKAGE (L)
3 LEAD SOT-23 PLASTIC PACKAGE (M)
0.090-0.102
(2.29-2.60)
0.173-0.181
(4.40-4.60)
0.064-0.072
(1.62-1.83)
0.155-0.167
(3.94-4.25)
0.059
(1.50)
BSC
0.035-0.047
(0.89-1.20)
L (SOT-89 ) AMS DRW# 042392
0.118
(3.00)
BSC
0.014-0.019
(0.36-0.48)
0.017-0.022
(0.44-0.56)
0.084-0.090
(2.13-2.29)
0.055-0.063
(1.40-1.60)
0.014-0.017
(0.35-0.44)
0.047-0.055
(1.194-1.397)
0.015-0.017
(0.381-0.432)
0.110-0.120
(2.794-3.048)
0.083-0.098
(2.108-2.489)
0.035-0.040
(0.889-1.016)
0.070-0.080
(1.778-2.032)
0.018-0.024
(0.457-0.610)
10
NOM
0.0034-0.0050
(0.086-0.127)
(SOT-23 ) AMS DRW# 051991
0.035-0.041
(0.089-1.041)
0.0005-0.0040
(0.013-0.102)
0.018-0.024
(0.457-0.610)
10
NOM
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