ADMOS AMS385CS, AMS385CN, AMS385CL, AMS385BS, AMS385BN Datasheet
...
Advanced AMS285/AMS385
Monolithic ADJUSTABLE MICROPOWER VOLTAGE REFERENCE DIODE
Systems
FEATURES APPLICATIONS
•• Adjustable from 1.24V to 5.30V •• Battery Powered Systems
•• Operating Current 10µµA to 20mA •• Instrumentation
•• 1% and 2% Initial Tolerance •• A/D, D/A Converters
•• 1ΩΩ Dynamic Impedance •• Temperature measurement
•• Low Temperature Coefficient •• Current sources
•• 1.2V Device and 2.5V Device also available •• Notebook/Personal Computer
AMS285-1.2 and AMS285-2.5 series, respectively
AMS385-1.2 and AMS385-2.5 series.
GENERAL DESCRIPTION
The AMS285/AMS385 are three-terminal micropower band-gap voltage reference diodes. They feature a very low dynamic
impedance and good temperature coefficient, operating from 1.24V to 5.3V and over a 10µA to 20mA current range. On-chip
trimming is used to provide tight voltage tolerance. Since the AMS285/AMS385 is a band-gap reference, uses only transistors
and resistors, low noise and good long-term stability result. Careful design of the AMS285/AMS385 has made the device
exceptionally tolerant of capacitive loading, making it easy to use in almost any reference application. The wide dynamic
operating range allows its use with widely varying supplies with excellent regulation. The extremely low power drain of the
AMS285/AMS385 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.
Further more, the wide operating current allows it to replace older references with a tight tolerance part.
•• Monitors/ VCR/ TV
•• Pagers
The AMS285 is operational in the full industrial temperature range of -40°C to 85°C while AMS385 is operating over a 0°C
to 70°C temperature range. The AMS285/AMS385 are available in TO-92, SO-8 and SOT-89 packages.
ORDERING INFORMATION:
TOL. PACKAGE TYPE OPERATING
TO-92 8 LEAD SOIC SOT-89
±12mV AMS285AN AMS285AS AMS285AL
±25mV AMS285BN AMS285BS AMS285BL
±25mV AMS285CN AMS285CS AMS285CL
±12mV AMS385AN AMS385AS AMS385AL
±25mV AMS385BN AMS385BS AMS385BL
±25mV AMS385CN AMS385CS AMS385CL
TEMPERATURE RANGE
-40 to 85° C
-40 to 85° C
-40 to 85° C
0 to 70° C
0 to 70° C
0 to 70° C
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS285/AMS385
ABSOLUTE MAXIMUM RATINGS
Reverse Current 30mA Storage temperature
Forward Current 10mA Soldering information
Operating Temperature Range TO-92 package: 10 sec.
AMS285
AMS385
-40°C to 85°C
0°C to 70°C
SOIC package: Vapor phase (60 sec)
Infrared (15 sec.)
SOT-89 package: 10 sec.
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at IR = 100 µA, and TA = +25°C unless otherwise specified.
-55°C to +150°C
260°C
215°C
220°C
265°C
Parameter Conditions
Reference Voltage
Dynamic Output
Impedance
Reference Voltage
Change with Current
Min. Operating
Current (Note 4)
Wide Band Noise
(Note 5)
Temperature Coeff.
(Note 6)
Long Term Stability
(Note 5)
IR =100 µA
IAC =0.1IR, f = 20Hz
V
= V
OUT
REF
V
= 5.3V
OUT
10µA ≤IR ≤1mA
1mA ≤IR ≤20mA
V
= V
OUT
REF
V
= 5.3V
OUT
10Hz ≤ f ≤ 10kHz
V
= V
OUT
REF
V
= 5.3V
OUT
TA=25°C±.1°C
T = 1000 Hr
AMS285A
Min Typ Max
1.228 1.240 1.252 1.215 1.240 1.265 1.215 1.240 1.265 V
0.3
0.7
0.2
4
6
30
50
170
20 20 20 ppm
1.0
Min Typ Max
10
9
45
25 50 100 150
AMS285B
0.3
0.7
0.2
4
6
30
50
170
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at IR = 100 µA, and TA = +25°C unless otherwise specified.
Parameter Conditions
AMS285A
Min Typ Max
Min Typ Max
AMS285B
1.0
10
45
AMS285C
Min Typ Max
9
AMS285C
Min Typ Max
0.3
0.7
0.2
4
6
30
50
170
1.0
10
45
Units
Ω
mV
mV
9
µA
µA
µV
rms
µV
rms
ppm/°C
Units
Reference Voltage
Dynamic Output
Impedance
Reference Voltage
Change with Current
Min. Operating
Current (Note 4)
Wide Band Noise
(Note 5)
Temperature Coeff.
(Note 6)
Long Term Stability
(Note 5)
IR =100 µA
IAC =0.1IR, f = 20Hz
V
= V
OUT
REF
V
= 5.3V
OUT
10µA ≤IR ≤1mA
1mA ≤IR ≤20mA
V
= V
OUT
REF
V
= 5.3V
OUT
10Hz ≤ f ≤ 10kHz
V
= V
OUT
REF
V
= 5.3V
OUT
TA=25°C±.1°C
T = 1000 Hr
1.228 1.240 1.252 1.215 1.240 1.265 1.215 1.240 1.265 V
0.3
0.7
0.2
4
6
30
50
170
20 20 20 ppm
1.0
10
9
45
25 50 100 150
0.3
0.7
0.2
4
6
30
50
170
1.0
10
45
0.3
0.7
0.2
4
9
6
30
50
170
1.0
10
9
45
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
Ω
mV
mV
µA
µA
µV
rms
µV
rms
ppm/°C
AMS285/AMS385
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The
guaranteed specifications apply only for the test conditions listed.
Note 2: For elevated temperature operation, T
AMS285 +125°C
AMS385 +100°C
max is:
j
Thermal Resistance TO-92 SO-8 SOT-89
ϕ
(junction to ambient)
JA
Note 3: Parameters identified with boldface type apply at temperature extremes. All other numbers apply at T
170°C/W (0.125” leads) 165°C/W 160°C/W
= TJ = 25°C.
A
Note 4: Guaranteed and 100% production tested.
Note 5: Guaranteed but not 100% production tested. These limits are not used to calculate average outgoing quality levels.
Note 6: The average temperature coefficient is defined as the maximum deviation of reference voltage at all measured temperatures between the operating T
and T
, divided by T
MIN
MAX
- T
. The measured temperatures are 0°C, 25°C, 70°C and 85°C.
MIN
PIN CONNECTIONS
TO-92 8L SOIC SOT-89
Plastic Package (N) SO Package (S) (L)
N/C ADJN/C
FB -+
123
Bottom View Top View Top View
+
8437 56
1 2
N/C N/C N/C
123
-
FB
-+
MAX
TYPICAL APPLICATIONS
1.2V Reference 5.0V Reference Precision 10V Reference
9V
R1
500k
+
AMS385
-
1.2V
FB
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
9V
+
AMS385
R3
+= 1
1.24 VOUT
R2
120k
R3
364k
R2
5V
R1
50k
FB
-
15V
+
AMS385
R1
5k
FB
-
R2
301k
1%
R3
68.1k
1%
V
10V
OUT
Loading...