AD8628 Analog Devices, AD8628 Datasheet
AD8628
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AD8628 Summary of contents
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... Figure 6. 14-Lead TSSOP (RU-14) One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 Fax: 781.461.3113 © 2005 Analog Devices, Inc. All rights reserved AD8628 TOP VIEW – AD8628 V+ 7 OUT TOP VIEW AD8629 OUT B 7 –IN B TOP VIEW ...
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... AD8628/AD8629/AD8630 TABLE OF CONTENTS General Description ......................................................................... 3 Specifications..................................................................................... 4 Electrical Characteristics—V = 5.0 V............................................. 4 s Electrical Characteristics—V = 2.7 V............................................. 5 s Absolute Maximum Ratings............................................................ 6 ESD Caution.................................................................................. 6 Typical Performance Characteristics ............................................. 7 Functional Description .................................................................. 15 1/f Noise....................................................................................... 15 Peak-to-Peak Noise .................................................................... 16 Noise Behavior with First-Order Low-Pass Filter.................. 16 REVISION HISTORY 5/05—Rev Rev. E Changes to Ordering Guide .......................................................... 22 1/05— ...
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... Using Analog Devices’ topology, these zero-drift amplifiers combine low cost with high accuracy and low noise. No external capacitor is required. In addition, the AD8628/ AD8629/AD8630 greatly reduce the digital switching noise found in most chopper-stabilized amplifiers. With an offset voltage of only 1 μV, drift of less than 0.005 μ ...
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... AD8628/AD8629/AD8630 SPECIFICATIONS ELECTRICAL CHARACTERISTICS— 5 2 25°C, unless otherwise noted Table 1. Parameter INPUT CHARACTERISTICS Offset Voltage Input Bias Current (AD8630) Input Offset Current Input Voltage Range Common-Mode Rejection Ratio 1 Large Signal Voltage Gain Offset Voltage Drift OUTPUT CHARACTERISTICS ...
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... −40°C ≤ T ≤ +125° kΩ L GBP e p-p 0 kHz Rev Page AD8628/AD8629/AD8630 Min Typ Max Unit 1 5 μV 10 μV 30 100 pA 100 300 pA 1.0 1 200 pA 250 pA 0 2.7 V 115 ...
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... AD8628/AD8629/AD8630 ABSOLUTE MAXIMUM RATINGS Table 3. Parameters Supply Voltage Input Voltage 1 Differential Input Voltage Output Short-Circuit Duration to GND Storage Temperature Range R, RM, RU, RT, UJ Packages Operating Temperature Range Junction Temperature Range R, RM, RU, RT, UJ Packages Lead Temperature Range (Soldering, 60 sec) 1 Differential input voltage is limited to ± the supply voltage, whichever is less ...
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... Figure 8. AD8628 Input Bias Current vs. Input Common-Mode 1500 1000 500 0 –500 –1000 –1500 INPUT COMMON-MODE VOLTAGE (V) Figure 9. AD8628 Input Bias Current vs. Input Common-Mode Voltage 1.5 2.5 +85°C +25°C –40° 150°C 100 125°C 0. Rev Page ...
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... 2. –40°C TO +150°C A 1150 900 450 100 0 –50 – TEMPERATURE (°C) Figure 14. AD8628 Input Bias Current vs. Temperature 1250 T = 25°C A 1000 750 500 250 0 – 100 TEMPERATURE ( °C ) Figure 15. Supply Current vs. Temperature SINK 1 10 100 ...
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... 20pF 2kΩ 10M 10M 100M Rev Page AD8628/AD8629/AD8630 100 10k 100k 1M 10M FREQUENCY (Hz) Figure 22. Output Impedance vs. Frequency = ±1.35V 300pF L = ∞ ...
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... AD8628/AD8629/AD8630 = ±1.35V 50pF L = ∞ TIME (4μs/DIV) Figure 25. Small Signal Transient Response = ±2. 50pF L = ∞ TIME (4μs/DIV) Figure 26. Small Signal Transient Response 100 = ±1.35V 2kΩ 25° ...
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... V 2 2.0 1.5 1.0 0.5 0 100 1M 10M Figure 36. Maximum Output Swing vs. Frequency Rev Page AD8628/AD8629/AD8630 = ±1.35V S +PSRR –PSRR 1k 10k 100k 1M FREQUENCY (Hz) Figure 34. PSRR vs. Frequency = ±2.5V S +PSRR –PSRR 1k 10k 100k 1M FREQUENCY (Hz) Figure 35. PSRR vs. Frequency = 2. 10kΩ 25°C ...
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... AD8628/AD8629/AD8630 5 10kΩ 25° 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 100 1k 10k FREQUENCY (Hz) Figure 37. Maximum Output Swing vs. Frequency 0. 2.7V S 0.45 0.30 0.15 0 –0.15 –0.30 –0.45 –0. TIME (μs) Figure 38. 0 Noise 0. 0.45 0.30 0.15 0 –0.15 –0.30 –0.45 –0. TIME (μs) Figure 39 ...
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... V T 100 50 0 –50 –100 10 –50 Figure 47. Output Short-Circuit Current vs. Temperature 1k V 100 10 1 0.10 –50 100 125 Figure 48. Output-to-Rail Voltage vs. Temperature Rev Page AD8628/AD8629/AD8630 = 2. –40°C TO +150° – – 100 125 150 TEMPERATURE (° – ...
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... AD8628/AD8629/AD8630 2. – 1kΩ 100 V – – 10kΩ – 100kΩ – 0.10 –50 – TEMPERATURE (°C) Figure 49. Output-to-Rail Voltage vs. Temperature @ 1kΩ – 10kΩ 100kΩ ...
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... The comparison shown in Figure 51 indicates an input-referred noise density of 19.4 nV/√ kHz for the AD8628, which is much better than the LTC2050 and LMC2001. The noise is flat from dc to 1.5 kHz, slowly increasing kHz. The lower noise at low frequency is desirable where auto-zero amplifiers are widely used ...
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... The AD8628 was simulated as a low-pass filter (Figure 55) and then configured as shown in Figure 54. The behavior of the AD8628 matches the simulated data. It was verified that noise is rolled off by first-order filtering. Figure 55 and Figure 56 show the difference between the simulated and actual transfer functions of the circuit shown in Figure 54 ...
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... This is a common situation when an amplifier is used to drive the input of switched capacitor ADCs OUT Figure 58. Positive Input Overload Recovery for the AD8628 OUT Figure 59. Positive Input Overload Recovery for LTC2050 V ...
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... AD8628/AD8629/AD8630 OUT 0V TIME (500 μ s/DIV) Figure 61. Negative Input Overload Recovery for the AD8628 OUT 0V TIME (500 μ s/DIV) Figure 62. Negative Input Overload Recovery for LTC2050 OUT 0V TIME (500 μ s/DIV) Figure 63. Negative Input Overload Recovery for LMC2001 The results shown in Figure 58 to Figure 63 are summarized in Table 5 ...
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... I little error. Output impedance of the DAC is constant and code- independent, but the high input impedance of the AD8628/ AD8629/AD8630 minimizes gain errors. The amplifiers’ wide bandwidth also serves well in this case. The amplifiers, with settling time of 1 μs, add another time constant to the system, increasing the settling time of the output. The settling time of the AD5541 is 1 μ ...
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... AD8628/AD8629/AD8630 OUTLINE DIMENSIONS 2.90 BSC 5 4 2.80 BSC 1.60 BSC PIN 1 0.95 BSC 1.90 * 0.90 BSC 0.87 0.84 * 1.00 MAX 0.20 0.08 0.10 MAX 0.50 SEATING PLANE 0.30 * COMPLIANT TO JEDEC STANDARDS MO-193-AB WITH THE EXCEPTION OF PACKAGE HEIGHT AND THICKNESS. Figure 67. 5-Lead Thin Small Outline Transistor Package [TSOT] (UJ-5) Dimensions shown in millimeters 2.90 BSC 5 4 2.80 BSC 1.60 BSC ...
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... Dimensions shown in millimeters and (inches) 14 4.50 4.40 4.30 0.50 (0.0197) × 45° 0.25 (0.0098) 1 PIN 1 8° 0° 0.65 1.27 (0.0500) 1.05 BSC 0.40 (0.0157) 1.00 0.80 0.15 0.05 COMPLIANT TO JEDEC STANDARDS MO-153AB-1 Figure 72. 14-Lead Thin Shrink Small Outline Package [TSSOP] Rev Page AD8628/AD8629/AD8630 5.10 5.00 4.90 8 6.40 BSC 7 0.20 1.20 0.09 MAX 8° 0.30 0° SEATING 0.19 COPLANARITY PLANE 0.10 (RU-14) Dimensions shown in millimeters 0.75 0.60 ...
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... AD8628AR-REEL −40°C to +125°C AD8628AR-REEL7 −40°C to +125°C 1 AD8628ARZ −40°C to +125°C 1 AD8628ARZ-REEL −40°C to +125°C 1 AD8628ARZ-REEL7 −40°C to +125°C AD8628ART-R2 −40°C to +125°C AD8628ART-REEL7 −40°C to +125°C 1 AD8628ARTZ-R2 −40°C to +125°C 1 AD8628ARTZ-REEL7 − ...
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... NOTES Rev Page AD8628/AD8629/AD8630 ...
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... AD8628/AD8629/AD8630 NOTES ©2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C02735–0–5/05(E) Rev Page ...