AD8028 Analog Devices, AD8028 Datasheet
AD8028
Specifications of AD8028
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AD8028 Summary of contents
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... The AD8027/AD8028 have a unique feature that allows the user to select the input crossover threshold voltage through the SELECT pin. This feature controls the voltage at which the complementary transistor input pairs switch ...
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... B to Rev. C Updated Format..................................................................Universal Change to Figure 1 ........................................................................... 1 10/03—Rev Rev. B Changes to Figure 1...........................................................................1 8/03—Rev Rev. A Addition of AD8028........................................................... Universal Changes to GENERAL DESCRIPTION.........................................1 Changes to Figures 13, 15, 17 ......................... Changes to Figures 58, 60........................................................ 18, 20 Changes to SPECIFICATIONS........................................................3 Updated OUTLINE DIMENSIONS .............................................22 Updated ORDERING GUIDE.......................................................23 3/03— ...
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... V CM Three-state < ±20 μA 50% of input to <10% of final − −1 I Sinking and Sourcing V = 0 MHz, SELECT = low IN 30% overshoot SELECT = low V ± Rev Page AD8027/AD8028 Min Typ Max 138 190 90/100 35 120 80 4.3 1.6 0.1 0.2 −93 ...
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... AD8027/AD8028 25° kΩ to midsupply, unless otherwise noted Table 2. Parameter DYNAMIC PERFORMANCE −3 dB Bandwidth Bandwidth for 0.1 dB Flatness Slew Rate Settling Time to 0.1% NOISE/DISTORTION PERFORMANCE Spurious-Free Dynamic Range (SFDR) Input Voltage Noise Input Current Noise Differential Gain Error Differential Phase Error ...
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... Three-state < ±20 μA 50% of input to <10% of final – – kΩ L Sinking and sourcing V = 0 MHz, SELECT = low IN 30% Overshoot SELECT = low V ± Rev Page AD8027/AD8028 Min Typ Max 125 180 73/100 4.3 1.6 0.15 0.20 –89 200 ...
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... Exposure to absolute maximum rating conditions for extended periods may affect device reliability. MAXIMUM POWER DISSIPATION The maximum safe power dissipation in the AD8027/AD8028 package is limited by the associated rise in junction temperature ( the die. The plastic encapsulating the die locally reaches J the junction temperature. At approximately 150° ...
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... SOIC-8 (125°C/W), SOT-23-6 (170°C/W), and MSOP-10 (130°C/W) packages on a JEDEC standard 4-layer board. Output Short Circuit Shorting the output to ground or drawing excessive current from the AD8027/AD8028 can likely cause catastrophic failure. 2.0 1.5 1.0 MSOP-10 SOT-23-6 0 ...
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... AD8028 –1 100 1000 03327-A-003 ± +5V S 100 1000 03327-A-004 Figure 8. AD8028 Small Signal Frequency Response for Various Supplies = ± 100 1000 03327-A-005 Rev Page + 200mV p-p OUT +5V ...
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... Figure 12. AD8027 Small Signal Frequency Response vs. Temperature C = 20pF 5pF L –10 100 1000 03327-A-009 Figure 13. AD8028 Small Signal Frequency Response for Various C LOAD = 200mV p-p 100 1000 03327-A-010 Figure 14. Small Signal Frequency Response for Various R +125°C +25°C 100 1000 03327-A-011 Figure 15 ...
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... CROSSTALK = 20log (V –10 –20 –30 –40 –50 –60 –70 – –90 –100 –110 –120 –130 –140 0.001 0.01 0.1 1 FREQUENCY (MHz) Figure 17. AD8028 Crosstalk Output to Output 110 100 GAIN –10 10 100 1k 10k 100k 1M FREQUENCY (Hz) Figure 18. Open-Loop Gain and Phase vs. Frequency ...
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... L –40 –60 –80 –100 –120 –140 10 20 03327-A-023 Figure 27. Harmonic Distortion vs. Frequency and Gain Rev Page AD8027/AD8028 24.9Ω 1.0V p-p @ 2MHz OUT SELECT = TRI SELECT = HIGH SELECT = HIGH SELECT = TRI SECOND HARMONIC: SOLID LINE THIRD HARMONIC: DASHED LINE ...
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... AD8027/AD8028 0. ± 2.5V S 0.15 0.10 0.05 0 –0.05 –0.10 –0.15 50mV/DIV –0.20 Figure 28. Small Signal Transient Response p-p OUT 2 ±2. p-p OUT 1.0 0 –1.0 –2.0 500mV/DIV Figure 29. Large Signal Transient Response 2 p OUT V = ±2.5V 2 p-p OUT 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 50mV/DIV –2.5 Figure 30 ...
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... Rev Page AD8027/AD8028 SELECT = TRI ± + INPUT COMMON-MODE VOLTAGE (V) COUNT = 1780 SELECT HIGH ...
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... AD8027/AD8028 290 270 SELECT = HIGH 250 230 210 SELECT = TRI 190 170 150 –5 –4 –3 –2 – INPUT COMMON-MODE VOLTAGE (V) Figure 40. Input Offset Voltage vs. Input Common-Mode Voltage, V 290 V = +5V S 270 250 SELECT = HIGH 230 210 SELECT = TRI 190 170 ...
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... Figure 50. Output Disabled—Impedance vs. Frequency – –20 –40 –60 –80 95 110 125 0 03327-A-047 Rev Page AD8027/AD8028 ±5V +5V + (mA) LOAD Figure 49. Open-Loop Gain vs. Load Current SELECT = LOW 1M 10M 100M FREQUENCY (Hz) +125° +5V ...
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... AD8027/AD8028 1.5 SELECT PIN (–2.0V TO –0.5V) 1.0 OUTPUT 0 100Ω 1kΩ L –0 10kΩ L –1.0 –1 100 150 TIME (ns) Figure 52. Enable Turn-On Timing 1.5 SELECT PIN (–2.0V TO –0.5V) 1.0 OUTPUT 0.5 = 100 Ω Ω –0.5 = 10k Ω –1 = ± 2.5V – ...
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... THEORY OF OPERATION The AD8027/AD8028 are rail-to-rail input/output amplifiers designed in the Analog Devices XFCB process. The XFCB process enables the AD8027/AD8028 to run on 2 supplies with 190 MHz of bandwidth and over 100 V/μs of slew rate. The AD8027/AD8028 have 4.3 nV/√Hz of wideband noise with 17 nV/√ ...
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... The size of the discontinuity is defined as Using the crossover select feature of the AD8027/AD8028 helps to avoid this region. In the event that the region cannot be avoided, the quantity (V this effect. ...
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... With a wide bandwidth of over 190 MHz, the AD8027/AD8028 have numerous applications and configurations. The AD8027/ AD8028 part shown in Figure 57 is configured as a noninvert- ing amplifier. An easy selection table of gain, resistor values, bandwidth, slew rate, and noise performance is presented in Table 5, and the inverting configuration is shown in Figure 58. ...
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... AD8027/AD8028 PCB Layout As with all high speed op amps, achieving optimum perform- ance from the AD8027/AD8028 requires careful attention to PCB layout. Particular care must be exercised to minimize lead lengths of the bypass capacitors. Excess lead inductance can influence the frequency response and even cause high frequency oscillations ...
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... OFF DRIVING A 16-BIT ADC With the adjustable crossover distortion selection point and low noise, the AD8028 is an ideal amplifier for driving or buffering input signals into high resolution ADCs such as the AD7767, a 16-bit, 1 LSB INL, 1 MSPS differential ADC. Figure 60 shows the typical schematic for driving the ADC. The AD8028 driving ...
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... Otherwise, a phase shift can occur O in the amplifier, causing instability and oscillations. In Figure 62, the AD8027/AD8028 part is configured MHz band-pass filter. The target specifications are f and a −3 dB pass band of 500 kHz. To start the design, select f Q, C1, and R4. Then use the following equations to calculate the ...
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... BSC 3.00 BSC 1 5 PIN 1 0.50 BSC 0.95 0.85 1.10 MAX 0.75 0.15 0.27 SEATING 0.23 0.00 PLANE 0.17 0.08 COPLANARITY 0.10 COMPLIANT TO JEDEC STANDARDS MO-187BA Figure 66. 10-Lead Mini Small Outline Package [MSOP] (RM-10) Dimensions shown in millimeters Rev Page AD8027/AD8028 0.50 (0.0196) × 45° 0.25 (0.0099) 8° 0° 1.27 (0.0500) 0.40 (0.0157) 10° 0.60 4° 0.45 0° 0.30 0.80 8° 0.60 0° 0.40 ...
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... AD8028ARZ 1 AD8028ARZ-REEL 1 2,500 1 AD8028ARZ-REEL7 1,000 AD8028ARM 1 AD8028ARM-REEL 3,000 AD8028ARM-REEL7 1,000 1 AD8028ARMZ 1 1 AD8028ARMZ-REEL 3,000 1 AD8028ARMZ-REEL7 1,000 Pb-free part, # denotes lead-free, may be top or bottom marked. © 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. ...