Analog Devices ADR318 Datasheet
Precision Low Drift SOT-23
a
FEATURES
Initial Accuracy: ⴞ5 mV Max, ⴞ0.27% Max
Low Temperature Coefficient: 25 ppm/ⴗC Max
Load Regulation: 100 ppm/mA
Line Regulation: 25 ppm/V
Low Supply Headroom: 0.6 V
Wide Operating Range: (V
Low Power: 120 A Max
Shutdown to Less than 3 A Max
Output Current: 5 mA
Wide Temperature Range: 0ⴗC to 70ⴗC
Tiny 5-Lead SOT-23 Package
APPLICATIONS
Battery Powered Instrumentation
Portable Medical Instruments
Data Acquisition Systems
Industrial Process Control Systems
Fault Protection Critical Systems
GENERAL DESCRIPTION
+ 0.6 V) to 15 V
OUT
Voltage Reference with Shutdown
The ADR318 is a precision 1.8 V band gap voltage reference
featuring high accuracy, high stability, and low power consumption in a tiny footprint. Patented temperature drift curvature
correction techniques minimize nonlinearity of the voltage change
with temperature. The wide operating range and low power consumption with additional shutdown capability make the part ideal
for battery powered applications. The V
OUT (SENSE)
pin enables
greater accuracy by supporting full Kelvin operation in PCBs
employing thin or long traces.
The ADR318 is a low dropout voltage (LDV) device that provides
a stable output voltage from supplies as low as 600 mV above
the output voltage. This device is specified over the industrial
operating range of 0°C to 70°C, and is available in the tiny
5-lead SOT-23 package.
The combination of V
OUT (SENSE)
and shutdown functions also
enables a number of unique applications, combining precision
reference/regulation with fault decision and overcurrent protection.
Details are provided in the Applications section.
PIN CONFIGURATION
5-Lead SOT-23
SHDN
V
OUT (SENSE)
1
V
2
ADR318
IN
3
5
4
ADR318
GND
–V
OUT (FORCE)
*
*Protected by U.S. Patent No. 5,969,657; other patents pending.
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may result from its use. No license is granted by implication or otherwise
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Tel: 781/329-4700 www.analog.com
Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved.
ADR318–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
(TA = T
MIN
to T
,1 VIN = 5 V, unless otherwise noted.)
MAX
Parameter Symbol Conditions Min Typ Max Unit
Initial Accuracy V
Initial Accuracy Error V
Temperature Coefficient TCV
Minimum Supply Voltage Headroom V
Line Regulation ∆V
Load Regulation ∆V
Quiescent Current I
Voltage Noise e
Turn-On Settling Time t
Long Term Stability
2
Output Voltage Hysteresis V
Ripple Rejection Ratio RRR f
Short Circuit to Ground I
Shutdown Supply Current I
Shutdown Logic Input Current I
Shutdown Logic Low V
Shutdown Logic High V
NOTES
1
T
= 0°C, T
MIN
2
The long-term stability specification is noncumulative. The drift in subsequent 1,000 hour periods is significantly lower than in the first 1,000 hour period.
Specifications subject to change without notice.
MAX
= 70°C
O
OERR
IN
SY
N
R
∆V
O_HYS
SC
SHDN
LOGIC
INL
INH
O
– V
OUT
OUT
OUT
OUT
/∆V
IN
/∆I
LOADVIN
0°C to 70°C525ppm/°C
VIN = 2.5 V to 15 V 10 25 ppm/V
0°C < T
0°C < T
< 70°C
A
= 3 V, I
< 70°C
A
= 0 mA to 5 mA 100 ppm/mA
LOAD
No load 100 120 µA
0°C < T
< 70°C 140 µA
A
0.1 Hz to 10 Hz 5 µV p-p
= 60 Hz 85 dB
IN
VIN = 5.0 V 25 mA
= 15.0 V 30 mA
V
IN
1.795 1.8 1.802 V
–0.27 +0.27 %
600 mV
20 µs
50 ppm/1,000 hrs
40 ppm
3 µA
500 nA
0.8 V
2.4 V
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ADR318
ABSOLUTE MAXIMUM RATINGS
1, 2
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 V
Output Short-Circuit Duration
to GND . . . . . . . . . . . . . . . . . . . . . Observe Derating Curves
Storage Temperature Range
RJ Package . . . . . . . . . . . . . . . . . . . . . . . . .–65°C to +125°C
Operating Temperature Range . . . . . . . . . . . . . . . 0°C to 70°C
Junction Temperature Range
RJ Package . . . . . . . . . . . . . . . . . . . . . . . . .–65°C to +150°C
Lead Temperature Range
Soldering, 60 sec . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300°C
NOTES
1
Absolute maximum ratings apply at 25°C, unless otherwise noted.
2
Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those listed in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
ORDERING GUIDE
Temperature Package Package Branding Output Devices
Model Range Description Option Information Voltage per Reel
ADR318ARJ-REEL7 0ºC to 70ºC 5-Lead SOT-23 RJ-5 R0A 1.800 V 3,000
Package Type
JA
JC
Unit
5-Lead SOT-23 (RJ) 230 146 °C/W
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although the
ADR318 features proprietary ESD protection circuitry, permanent damage may occur on devices
subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended
to avoid performance degradation or loss of functionality.
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