AD680ANZ Analog Devices Inc, AD680ANZ Datasheet - Page 7

• 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

TURN-ON TIME
Upon application of power (cold start), the time required for
the output voltage to reach its final value within a specified error
band is defined as the turn-on settling time. Two components
normally associated with this are the time for the active circuits
to settle, and the time for the thermal gradients on the chip to
stabilize. The turn-on settling time of the AD680 is about 20 μs
to within 0.025% of its final value, as shown in Figure 8.
The AD680 thermal settling characteristic benefits from its
compact design. Once initial turn-on is achieved, the output
linearly approaches its final value; the output is typically within
0.01% of its final value after 25 ms.
DYNAMIC PERFORMANCE
The output stage of the amplifier is designed to provide the
AD680 with static and dynamic load regulation superior to
less complete references. Figure 9 to Figure 11 display the char-
acteristics of the AD680 output amplifier driving a 0 mA to
10 mA load. Longer settling times result if the reference is
forced to sink any transient current.
500μV
V
OUT
V
IN
100
0%
100
0%
90
10
90
10
Figure 7. Broadband Noise at 300 kHz
500μV
5V
Figure 8. Turn-On Settling Time
1mV
10μs
50μs
Rev. H | Page 7 of 12
In some applications, a varying load may be both resistive and
capacitive in nature, or the load may be connected to the
AD680 by a long capacitive cable.
V
V
OUT
OUT
V
V
IN
L
100
100
0%
0%
90
10
90
10
Figure 11. Fine Scale Settling for Transient Load
2V
2V
Figure 10. Large Scale Transient Response
0.1μF
Figure 9. Transient Load Test Circuit
AD680
+V
IN
50mV
5mV
V
OUT
V
L
249Ω
V
0V
OUT
V
OUT
5μs
5μs
AD680