AD1403A [ADI]
Low Cost, Precision 2.5 V IC References; 低成本，高精度2.5 V IC参考
| 型号： | AD1403A |
| 厂家： | 
ADI |
| 描述： | Low Cost, Precision 2.5 V IC References |
| 文件： | 总4页 (文件大小：83K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Low Cost, Precision
2.5 V IC References
a
AD1403/AD1403A*
FUNCTIO NAL BLO CK D IAGRAM
FEATURES
Im proved, Low er Cost, Replacem ents for Standard
1403, 1403A
3-Term inal Device: Voltage In/ Voltage Out
Laser Trim m ed to High Accuracy: 2.500 V ؎ 10 m V
(AD1403A)
Excellent Tem perature Stability: 25 ppm / ؇C (AD1403A)
Low Quiescent Current: 1.5 m A m ax
10 m A Current Output Capability
Low Cost
Convenient Mini-DIP Package
P RO D UCT D ESCRIP TIO N
P RO D UCT H IGH LIGH TS
T he AD1403 and AD1403A are improved three-terminal, low
cost, temperature compensated, bandgap voltage references that
provide a fixed 2.5 V output voltage for inputs between 4.5 V
and 40 V. A unique combination of advanced circuit design and
laser-wafer-trimmed thin-film resistors provides the AD1403/
AD1403A with an initial tolerance of ±10 mV and a tempera-
ture stability of better than 25 ppm/°C. In addition, the low
quiescent current drain of 1.5 mA (max) offers a clear advan-
tage over classical Zener techniques.
1. T he AD1403A offers improved initial tolerance over the in-
dustry-standard 1403A: ±10 mV versus ±25 mV at a lower
cost.
2. T he three-terminal voltage in/voltage out operation of the
AD1403/AD1403A provides a regulated output voltage with-
out any external components.
3. T he AD1403/AD1403A provides a stable 2.5 V output volt-
age for input voltages between 4.5 V and 40 V making these
devices ideal for systems that contain a single logic supply.
T he AD1403 or AD1403A is recommended as a stable refer-
ence for all 8-, 10- and 12-bit D-to-A converters that require an
external reference. In addition, the wide input range of the
AD1403/AD1403A allows operation with 5 volt logic supplies,
making these devices ideal for digital panel meter applications
and when only a single logic supply is available.
4. T hin film resistor technology and tightly controlled bipolar
processing provide the AD1403A with temperature stabilities
of 25 ppm/°C.
5. T he low 1.5 mA maximum quiescent current drain of the
AD1403 and AD1403A makes them ideal for CMOS and
other low power applications.
T he AD1403 and AD1403A are specified for operation over the
0°C to +70°C temperature range. T he AD580 series of 2.5 volt
precision IC references is recommended for applications where
operation over the –55°C to +125°C range is required.
*P r otected by U.S. P atent Num ber s: 3,887,863, RE 30,586.
REV. A
Inform ation furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assum ed by Analog Devices for its
use, nor for any infringem ents of patents or other rights of third parties
which m ay result from its use. No license is granted by im plication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norw ood, MA 02062-9106, U.S.A.
Tel: 617/ 329-4700
Fax: 617/ 326-8703
(V = 15 V, T = +25؇C unless otherwise noted.)
AD1403/AD1403A–SPECIFICATIONS
IN
A
Characteristic
Sym bol
Min
Typ
Max
Unit
Output Voltage
(IO = 0 mA)
AD1403
VO
2.475
2.490
2.500
2.500
2.525
2.510
V
AD1403A
T emperature Coefficient of Output Voltage
AD1403
AD1403A
∆VO/∆T
∆VO
ppm/°C
10
10
40
25
Output Voltage Change, 0°C to +70°C
AD1403
AD1403A
mV
mV
7.0
4.4
Line Regulation
Regin
(15 V ≤ VIN ≤ 40 V)
(4.5 ≤ VIN ≤ 15 V)
1.2
0.6
4.5
3.0
Load Regulation
(0 mA < IO < 10 mA)
Regload
II
10
mV
mA
Quiescent Current
(IO = 0 mA)
1.2
1.5
Specifications subject to change without notice.
MAXIMUM RATINGS (T A = +25°C unless otherwise noted)
O RD ERING GUID E
Rating
Sym bol
VIN
Value
40
Unit
V
Initial
Tolerance
P ackage
O ption*
Model
Input Voltage
AD1403
AD1403A
±25 mV
±10 mV
N-8
N-8
Storage T emperature
Junction T emperature
T ST G
T J
–25 to 100
+175
°C
°C
*N Plastic DIP.
Operating Ambient
T emperature Range
T A
0 to +70
°C
Figure 2. Sim plified AD1403 Schem atic
Figure 1. AD1403/AD1403A Connection Diagram
–2–
REV. A
Typical Performance Curves–
AD1403/AD1403A
Figure 3. Typical Change in VOUT vs. VIN
Figure 6. Change in VOUT vs. Tem perature
(Norm alized to VOUT @ VlN = 15 V @ TC = 25°C)
(Norm alized to VOUT @ VIN = 15 V)
Figure 4. Change in Output Voltage vs. Load Current
(Norm alized to VOUT @ VIN = 15 V, lOUT = 0 m A)
Figure 7. Change in VOUT vs. Tem perature
(Norm alized to VOUT @ VlN = 15 V, IOUT = 0 m A)
VO LTAGE VARIATIO N VS. TEMP ERATURE AND LINE
Some confusion exists in the area of defining and specifying ref-
erence voltage error over temperature. Historically, references
are characterized using a maximum deviation per degree Centi-
grade; i.e., 10 ppm/°C. However, because of the inconsistent
nonlinearities in Zener references (butterfly or “S” type charac-
teristics), most manufacturers use a maximum limit error band
approach to characterize their references. T his technique mea-
sures the output voltage at 3 to 5 different temperatures and
guarantees that the output voltage deviation will fall within the
guaranteed error band at these discrete temperatures. T his ap-
proach, of course, makes no mention or guarantee of perfor-
mance at any other temperature within the operating
temperature range of the device.
T he consistent Voltage vs. T emperature performance of a typi-
cal AD1403 is shown in Figure 6. Note that the characteristic is
quasi-parabolic, not the possible “S” type characteristics of clas-
sical Zener references. T his parabolic characteristic permits a
maximum output deviation specification over the device’s full
operating temperature range, rather than just at 3 to 5 discrete
temperatures.
Figure 5. Quiescent Current vs. Tem perature
(VIN = 15 V, IOUT = 0 m A)
REV. A
–3–
Applying the AD1403/AD1403A
T he AD1403 exhibits a worst-case shift of 7.5 mV over the en-
tire range of operating input voltage, 4.5 volts to 40 volts. T ypi-
cally, the shift is less than 1 mV as shown in Figure 3.
Figure 9a shows the AD1403 connected as a current source.
T otal current is equal to the quiescent current plus the load
current. Most of the temperature coefficient comes from the
quiescent current term II, which has a typical T C of 0.13%/°C
(1300 ppm/°C). T he load voltage (and hence current) T C is
much lower at ±40 ppm/°C max (AD1403). T herefore, the
overall temperature coefficient decreases rapidly as the load cur-
rent is increased. Figure 9b shows the typical temperature coef-
ficient for currents between 1.5 mA and 10 mA. Use of an
AD1403A will not improve the T C appreciably.
TH E AD 1403A AS A LO W P O WER, LO W VO LTAGE
P RECISIO N REFERENCE FO R D ATA CO NVERTERS
T he AD1403A has a number of features that make it ideally
suited for use with A/D and D/A data converters used in com-
plex microprocessor-based systems. T he calibrated 2.500 volt
output minimizes user trim requirements and allows operation
from a single low voltage supply. Low power consumption
(1.5 mA quiescent current) is commensurate with that of CMOS-
type devices, while the low cost and small package complements
the decreasing cost and size of the latest converters.
Figure 8 shows the AD1403A used as a reference for the
AD7524 low-cost 8-bit CMOS DAC with complete micro-
Figure 9a. The AD1403 as a Precision Program m able
Current Source
Figure 9b. Typical Tem perature Coefficient of Current
Source
Figure 8. Low Power, Low Voltage Reference for the
AD7524 Microprocessor-Com patible 8-Bit DAC
O UTLINE D IMENSIO NS
processor interface. T he AD1403A and the AD7524 are speci-
fied to operate from a single 5 volt supply; this eliminates the
need to provide a +15 volt power supply for the sole purpose of
operating a reference. T he AD7524 includes an 8-bit data regis-
ter, and address decoding logic; it may thus be interfaced di-
rectly to an 8- or 16-bit data bus. Only 300 µA of quiescent
current from the single +5 volt supply is required to operate the
AD7524 which is packaged in a small 16-pin DIP. T he AD542
output amplifier is also low power, requiring only 1.5 mA quies-
cent current. Its laser-trimmed offset voltage preserves the ±1/2
LSB linearity of the AD7524KN without user trims and it typi-
cally settles to ±1/2 LSB in less than 5 microseconds. It will pro-
vide the 0 volt to –2.5 volt output swing from ±5 volt supplies.
D imensions shown in inches and (mm).
8-P in Mini-D IP (N)
TH E AD 1403 AS A P RECISIO N P RO GRAMMABLE
CURRENT SO URCE
T he AD1403 is an excellent building block for precision current
sources. Its wide range of operating voltages, 4.5 V to 40 V,
along with excellent line regulation over that range (7.5 mV)
result in high insensitivity to varying load impedances. T he low
quiescent current (II) of 1.5 mA (max) and the maximum speci-
fied maximum load current of 10 mA allows the user to pro-
gram current to any value between 1.5 mA and 10 mA.
–4–
REV. A
相关型号：
AD1408-7D
IC PARALLEL, 8 BITS INPUT LOADING, 0.25 us SETTLING TIME, 8-BIT DAC, CDIP16, HERMETIC, CERAMIC, DIP-16, Digital to Analog Converter
ADI
AD1408-8D
IC PARALLEL, 8 BITS INPUT LOADING, 0.25 us SETTLING TIME, 8-BIT DAC, CDIP16, HERMETIC, CERAMIC, DIP-16, Digital to Analog Converter
ADI
AD1408-9D
IC PARALLEL, 8 BITS INPUT LOADING, 0.25 us SETTLING TIME, 8-BIT DAC, CDIP16, HERMETIC, CERAMIC, DIP-16, Digital to Analog Converter
ADI
©2020 ICPDF网 联系我们和版权申明