AD680ANZ Analog Devices Inc, AD680ANZ Datasheet - Page 8

• Manufacturer Part Number: AD680ANZ
• Description: IC VREF PREC 2.5V LP 8-DIP
• Manufacturer: Analog Devices Inc
• Type: Voltage Referencer

Specifications of AD680ANZ

• Temperature Coefficient: 20ppm/°C
• Reference Type: Series
• Voltage - Output: 2.5V
• Tolerance: ±0.2%
• Voltage - Input: 4.5 ~ 36 V
• Number Of Channels: 1
• Current - Quiescent: 250µA
• Current - Output: 50mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Topology: Series
• Input Voltage: 4.5V To 36V
• Reference Voltage: 2.5V
• Reference Voltage Tolerance: 5mV
• Voltage Reference Case Style: DIP
• No. Of Pins: 8
• Current, Output: 0 to 10 mA
• Current, Supply: 195 μA
• Package Type: PDIP-8
• Power Dissipation: 1 mW
• Regulation, Line: 40 μV/V
• Regulation, Load: 80 μV/mA
• Regulator Type: Switching
• Temperature, Operating, Range: -40 to +85 °C
• Voltage, Input: 5 V
• Voltage, Noise: 8 μVp-p
• Voltage, Output: 2.5 V
• Voltage, Supply: 4.5 to 5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Cathode: -
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

AD680
Figure 13 displays the output amplifier characteristics driving a
1,000 pF, 0 mA to 10 mA load.
LOAD REGULATION
Figure 14 depicts the load regulation characteristics of
the AD680.
V
V
OUT
OUT
V
V
L
L
100
100
Figure 12. Capacitive Load Transient Response Test Circuit
0%
0%
90
10
90
10
Figure 14. Typical Load Regulation Characteristics
Figure 13. Output Response with Capacitive Load
2V
1V
0.1μF
AD680
+V
IN
5mV
1mV
V
OUT
C
1000pF
L
V
L
249Ω
V
0V
OUT
V
OUT
100μs
5μs
Rev. H | Page 8 of 12
TEMPERATURE PERFORMANCE
The AD680 is designed for reference applications where tem-
perature performance is important. Extensive temperature
testing and characterization ensure that the device’s performance
is maintained over the specified temperature range.
Some confusion exists in the area of defining and specifying
reference voltage error over temperature. Historically, references
have been characterized using a maximum deviation per degree
centigrade, that is, ppm/°C. However, because of nonlinearities
in temperature characteristics that originated in standard Zener
references (such as “S” type characteristics), most manufac-
turers now use a maximum limit error band approach to specify
devices. This technique involves measuring the output at three
or more different temperatures to specify an output voltage
error band.
Figure 15 shows a typical output voltage drift for the AD680AN/
AD680AR and illustrates the test methodology. The box in
Figure 15 is bounded on the left and right sides by the operat-
ing temperature extremes, and on the top and bottom by the
maximum and minimum output voltages measured over the
operating temperature range.
The maximum height of the box for the appropriate temperature
range and device grade is shown in Table 4. Duplication of these
results requires a combination of high accuracy and stable tem-
perature control in a test system. Evaluation of the AD680 will
produce a curve similar to that in Figure 15, but output readings
could vary depending upon the test equipment used.
Table 4. Maximum Output Change in mV
Device Grade
AD680JN/AD680JR
AD680JT
AD680AN
2.501
2.500
2.499
2.498
–50
Figure 15. Typical AD680AN/AD680AR Temperature Drift
–30
–10
TEMPERATURE (°C)
0
20
0°C to 70°C
4.375
5.250
Not applicable
40
Maximum Output Change (mV)
60
80
100
SLOPE = TC
=
=
= 9.6ppm/°C
(85°C – (–40°C))
(T
−40°C to +85°C
Not applicable
Not applicable
6.250
MAX
– T
V
2.501 – 2.498
MAX
MIN
)
– V
×
2.5V
×
MIN
2.5V
×
10
×
10
–6
–6