Analog Devices AD581 Datasheet

FUNCTIONAL BLOCK DIAGRAM

REV. B

Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.

a

High Precision

10 V IC Reference

AD581*

FEATURES
Laser Trimmed to High Accuracy:

10.000 Volts ⴞ5 mV (L and U)

Trimmed Temperature Coefficient:

5 ppm/ⴗC max, 0ⴗC to +70ⴗ C (L)
10 ppm/ⴗC max, –55ⴗC to +125ⴗC (U)

Excellent Long-Term Stability:

25 ppm/1000 hrs. (Noncumulative)
Negative 10 Volt Reference Capability
Low Quiescent Current: 1.0 mA max
10 mA Current Output Capability
3-Terminal TO-5 Package
MIL-STD-883 Compliant Versions Available

PRODUCT DESCRIPTION

The AD581 is a three-terminal, temperature compensated,
monolithic bandgap voltage reference which provides a precise

10.00 volt output from an unregulated input level from 12 to 30
volts. Laser Wafer Trimming (LWT) is used to trim both the
initial error at +25°C as well as the temperature coefficient,
which results in high precision performance previously available
only in expensive hybrids or oven-regulated modules. The 5 mV
initial error tolerance and 5 ppm/°C guaranteed temperature co­efficient of the AD581L represent the best performance combi­nation available in a monolithic voltage reference.

The bandgap circuit design used in the AD581 offers several ad­vantages over classical Zener breakdown diode techniques. Most
important, no external components are required to achieve full
accuracy and stability of significance to low power systems. In
addition, total supply current to the device, including the output
buffer amplifier (which can supply up to 10 mA) is typically
750 µA. The long-term stability of the bandgap design is equiva­lent or superior to selected Zener reference diodes.

The AD581 is recommended for use as a reference for 8-, 10- or
12-bit D/A converters which require an external precision refer­ence. The device is also ideal for all types of A/D converters up
to 14-bit accuracy, either successive approximation or integrat­ing designs, and in general can offer better performance than
that provided by standard self-contained references.

The AD581J, K, and L are specified for operation from 0°C to
+70°C; the AD581S, T, and U are specified for the –55°C to
+125°C range. All grades are packaged in a hermetically sealed
three-terminal TO-5 metal can.

*Covered by Patent Nos. 3,887,863; RE 30,586.

PRODUCT HIGHLIGHTS

1. Laser trimming of both initial accuracy and temperature
coefficient results in very low errors over temperature
without the use of external components. The AD581L
has a maximum deviation from 10.000 volts of ±7.25 mV
from 0°C to +70°C, while the AD581U guarantees
± 15 mV maximum total error without external trims
from –55°C to +125°C.

2. Since the laser trimming is done on the wafer prior to sepa­ration into individual chips, the AD581 will be extremely
valuable to hybrid designers for its ease of use, lack of
required external trims, and inherent high performance.

3. The AD581 can also be operated in a two-terminal
“Zener” mode to provide a precision negative 10 volt
reference with just one external resistor to the unregu­lated supply. The performance in this mode is nearly equal
to that of the standard three-terminal configuration.

4. Advanced circuit design using the bandgap concept
allows the AD581 to give full performance with an un­regulated input voltage down to 13 volts. With an exter­nal resistor, the device will operate with a supply as low
as 11.4 volts.

5. The AD581 is available in versions compliant with MIL­STD-883. Refer to the Analog Devices Military Prod­ucts Databook or current AD581/883B data sheet for
detailed specifications.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] World Wide Web Site: http://www.analog.com
Fax: [phone] © Analog Devices, Inc., 2000

AD581–SPECIFICATIONS

Model AD581J AD581K AD581L

Min Typ Max Min Typ Max Min Typ Max Units

OUTPUT VOLTAGE TOLERANCE

(Error from Nominal 10,000 V Output) ⴞ30 ⴞ10 ⴞ5 mV

OUTPUT VOLTAGE CHANGE

Maximum Deviation from +25°C ⴞ13.5 ⴞ6.75 ⴞ2.25 mV
Value, T

MIN

to T

MAX

(Temperature Coefficient) 30 15 5 ppm/°C

LINE REGULATION

15 V ≤ V

IN

≤ 30 V 3.0 3.0 3.0 mV

(0.002) (0.002) (0.002) %/V

13 V ≤ VIN ≤ 15 V 1.0 1.0 1.0 mV

(0.005) (0.005) (0.005) %/V

LOAD REGULATION

0 ≤ I

OUT

≤ 5 mA 200 500 200 500 200 500 µV/mA

QUIESCENT CURRENT 0.75 1.0 0.75 1.0 0.75 1.0 mA

TURN-ON SETTLING TIME TO 0.1%

1

200 200 200 µs

NOISE (0.1 Hz to 10 Hz) 40 40 40 µV (p-p)

LONG-TERM STABILITY 25 25 25 ppm/1000 hrs.

SHORT-CIRCUIT CURRENT 30 30 30 mA

OUTPUT CURRENT

Source @ +25°C 101010 mA

Source T

MIN

to T

MAX

555 mA

Sink T

MIN

to T

MAX

555 µA

Sink –55°C to +85°C––– mA

TEMPERATURE RANGE

Specified 0 +70 0 +70 0 +70 °C
Operating –65 +150 –65 +150 –65 +150 °C

PACKAGE OPTION

2

TO-5 (H-03B) AD581JH AD581KH AD581LH

Model AD581S AD581T AD581U

Min Typ Max Min Typ Max Min Typ Max Units

OUTPUT VOLTAGE TOLERANCE

(Error from Nominal 10,000 V Output) ⴞ30 ⴞ10 ⴞ5 mV

OUTPUT VOLTAGE CHANGE

Maximum Deviation from +25°C ⴞ30 ⴞ15 ⴞ10 mV
Value, T

MIN

to T

MAX

(Temperature Coefficient) 30 15 10 ppm/°C

LINE REGULATION

15 V ≤ VIN ≤ 30 V 3.0 3.0 3.0 mV

(0.002) (0.002) (0.002) %/V

13 V ≤ VIN ≤ 15 V 1.0 1.0 1.0 mV

(0.005) (0.005) (0.005) %/V

LOAD REGULATION

0 ≤ I

OUT

≤ 5 mA 200 500 200 500 200 500 µV/mA

QUIESCENT CURRENT 0.75 1.0 0.75 1.0 0.75 1.0 mA

TURN-ON SETTLING TIME TO 0.1%

1

200 200 200 µs

NOISE (0.1 Hz to 10 Hz) 40 40 40 µV (p-p)

LONG-TERM STABILITY 25 25 25 ppm/1000 hrs.

SHORT-CIRCUIT CURRENT 30 30 30 mA

OUTPUT CURRENT

Source @ +25°C 101010 mA

Source T

MIN

to T

MAX

555 mA

Sink T

MIN

to T

MAX

200 200 200 µA

Sink –55°C to +85°C555 mA

TEMPERATURE RANGE

Specified –55 +125 –55 +125 –55 +125 °C
Operating –65 +150 –65 +150 –65 +150 °C

PACKAGE OPTION

2

TO-5 (H-03B) AD581SH AD581TH AD581UH

NOTES

1

See Figure 7.

2

H = Hermetic Metal Can.

Specifications subject to change without notice.

Specifications shown in boldface are tested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels.
All min and max specifications are

guaranteed, although only those shown in boldface are tested on all production units.

(@ VIN = +15 V and +25ⴗC)

REV. B

–2–