Datasheet AD680 (Analog Devices) - 7
| Manufacturer | Analog Devices |
| Description | Bandgap, Low Power 2.5v Reference |
| Pages / Page | 12 / 7 — AD680. 500. 100. +VIN. VOUT. 0.1. 249. OUT. TURN-ON TIME. 50mV. VL 90. … |
| Revision | H |
| File Format / Size | PDF / 402 Kb |
| Document Language | English |
AD680. 500. 100. +VIN. VOUT. 0.1. 249. OUT. TURN-ON TIME. 50mV. VL 90. 1mV. VIN. 5mV. DYNAMIC PERFORMANCE
Model Line for this Datasheet
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AD680
In some applications, a varying load may be both resistive and
500
μ
V 50
μ
s
capacitive in nature, or the load may be connected to the
100
AD680 by a long capacitive cable.
90 +VIN 500
μ
V VOUT 0.1
μ
F AD680 VOUT 249
Ω
10 V V OUT L 0% 0V
00813-009 Figure 9. Transient Load Test Circuit 00813-007 Figure 7. Broadband Noise at 300 kHz
TURN-ON TIME 2V 50mV 5
μ
s
Upon application of power (cold start), the time required for
100 VL 90
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
VOUT
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.
10 5V 1mV 10
μ
s 0% 100 VIN 90
00813-010 Figure 10. Large Scale Transient Response
VOUT 2V 5mV 5
μ
s 10 100 V 0% IN 90
00813-008 Figure 8. Turn-On Settling Time
VOUT
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
10
0.01% of its final value after 25 ms.
0% DYNAMIC PERFORMANCE
00813-011 The output stage of the amplifier is designed to provide the Figure 11. Fine Scale Settling for Transient Load 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. Rev. H | Page 7 of 12 Document Outline FEATURES GENERAL DESCRIPTION CONNECTION DIAGRAMS PRODUCT HIGHLIGHTS SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS OUTPUT PROTECTION ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS THEORY OF OPERATION APPLYING THE AD680 NOISE PERFORMANCE TURN-ON TIME DYNAMIC PERFORMANCE LOAD REGULATION TEMPERATURE PERFORMANCE TEMPERATURE OUTPUT PIN DIFFERENTIAL TEMPERATURE TRANSDUCER LOW POWER, LOW VOLTAGE REFERENCE FOR DATA CONVERTERS 4.5 V REFERENCE FROM A 5 V SUPPLY VOLTAGE REGULATOR FOR PORTABLE EQUIPMENT OUTLINE DIMENSIONS ORDERING GUIDE
AD680
In some applications, a varying load may be both resistive and
500
μ
V 50
μ
s
capacitive in nature, or the load may be connected to the
100
AD680 by a long capacitive cable.
90 +VIN 500
μ
V VOUT 0.1
μ
F AD680 VOUT 249
Ω
10 V V OUT L 0% 0V
00813-009 Figure 9. Transient Load Test Circuit 00813-007 Figure 7. Broadband Noise at 300 kHz
TURN-ON TIME 2V 50mV 5
μ
s
Upon application of power (cold start), the time required for
100 VL 90
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
VOUT
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.
10 5V 1mV 10
μ
s 0% 100 VIN 90
00813-010 Figure 10. Large Scale Transient Response
VOUT 2V 5mV 5
μ
s 10 100 V 0% IN 90
00813-008 Figure 8. Turn-On Settling Time
VOUT
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
10
0.01% of its final value after 25 ms.
0% DYNAMIC PERFORMANCE
00813-011 The output stage of the amplifier is designed to provide the Figure 11. Fine Scale Settling for Transient Load 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. Rev. H | Page 7 of 12 Document Outline FEATURES GENERAL DESCRIPTION CONNECTION DIAGRAMS PRODUCT HIGHLIGHTS SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS OUTPUT PROTECTION ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS THEORY OF OPERATION APPLYING THE AD680 NOISE PERFORMANCE TURN-ON TIME DYNAMIC PERFORMANCE LOAD REGULATION TEMPERATURE PERFORMANCE TEMPERATURE OUTPUT PIN DIFFERENTIAL TEMPERATURE TRANSDUCER LOW POWER, LOW VOLTAGE REFERENCE FOR DATA CONVERTERS 4.5 V REFERENCE FROM A 5 V SUPPLY VOLTAGE REGULATOR FOR PORTABLE EQUIPMENT OUTLINE DIMENSIONS ORDERING GUIDE
