ADA4891-2ARMZ Analog Devices Inc, ADA4891-2ARMZ Datasheet
ADA4891-2ARMZ
Specifications of ADA4891-2ARMZ
Available stocks
Related parts for ADA4891-2ARMZ
ADA4891-2ARMZ Summary of contents
Page 1
... In spite of their low cost, the ADA4891 family provides high performance and versatility. The rail-to-rail output stage enables the output to swing within each rail, enabling maximum dynamic range ...
Page 2
... Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 5 Maximum Power Dissipation ..................................................... 5 ESD Caution .................................................................................. 5 Typical Performance Characteristics ............................................. 6 Applications Information .............................................................. 12 Using the ADA4891 ................................................................... 12 Wideband, Noninverting Operation........................................ 12 Wideband, Inverting Gain Operation ..................................... 12 REVISION HISTORY 6/10—Rev Rev. A Changes to Figure 26 ........................................................................ 9 Changes to Figure 33 and Figure 34 ............................................. 10 Updated Outline Dimensions ....................................................... 18 Changes to Ordering Guide .......................................................... 18 2/10— ...
Page 3
... 150 Ω THD with 1 MHz p-p output Sourcing Sinking G = +1, <30% overshoot + 5.25 V, − −V = −0. Rev Page ADA4891-1/ADA4891-2 Min Typ Max 240 = 604 Ω 170/210 40 28 −79/−93 −75/−91 10 0.05 0.25 −80 ±2.5 ±10 ±3.2 6 − ...
Page 4
... ADA4891-1/ADA4891 25° 3 kΩ to 1.5 V, unless otherwise noted Table 2. Parameter DYNAMIC PERFORMANCE −3 dB Small Signal Bandwidth Bandwidth for 0.1 dB Flatness Slew Rate ( Large Signal Frequency Response Settling Time to 0.1% NOISE/DISTORTION PERFORMANCE Total Harmonic Distortion Input Voltage Noise Differential Gain Error (NTSC) ...
Page 5
... MAXIMUM POWER DISSIPATION The maximum power that can be safely dissipated by the ADA4891-1/ADA4891-2 is limited by the associated rise in junction temperature. The maximum safe junction temperature for plastic encapsulated devices is determined by the glass transition temperature of the plastic, approximately 150°C. ...
Page 6
... ADA4891-1/ADA4891-2 TYPICAL PERFORMANCE CHARACTERISTICS –1 –2 –3 – +10 –5 –6 – – 200mV p-p OUT R = 604Ω F – 1kΩ L –10 0 FREQUENCY (MHz) Figure 6. Small Signal Frequency Response vs. Gain 2. –3 –6 –9 – 200mV p-p OUT R = 1kΩ L –15 0 FREQUENCY (MHz) Figure 7. Small Signal Frequency Response vs. Supply Voltage 4 +85° ...
Page 7
... Figure 16. Harmonic Distortion (HD2, HD3) vs. Frequency – – – p-p –70 –80 –90 –100 –110 –120 0 1000 Figure 17. Harmonic Distortion vs. Output Voltage Rev Page ADA4891-1/ADA4891 1kΩ p-p OUT SECOND HARMONIC SECOND HARMONIC THIRD HARMONIC THIRD HARMONIC 1 FREQUENCY (MHz 1kΩ p-p OUT ...
Page 8
... ADA4891-1/ADA4891-2 – +1. –50 CONFIGURATION OUT –60 IN 1kΩ 50Ω –70 –V = –1.2V S –80 – SECOND HARMONIC –100 –110 THIRD HARMONIC FOR G = – –120 0 0.5 1.0 1.5 OUTPUT VOLTAGE (V p-p) Figure 18. Harmonic Distortion vs. Output Voltage, V – 604Ω SECOND HARMONIC 150Ω ...
Page 9
... Figure 26. Large Signal Step Response –1 100 = 200mV p-p = 1kΩ 0.5 0 –0.5 5ns/DIV 0. p-p OUT R = 604Ω F 0.20 0. –0.10 –0.20 10ns/DIV –0.30 0 Rev Page ADA4891-1/ADA4891 1kΩ p-p OUT R = 150Ω L 5ns/DIV 0.5V/DIV Figure 27. Large Signal Step Response 1kΩ p-p OUT R = 150Ω ...
Page 10
... ADA4891-1/ADA4891-2 200 150Ω L 190 FALLING EDGE 180 170 160 RISING EDGE 150 140 1.0 1.5 2.0 2.5 3.0 3.5 OUTPUT STEP AMPLITUDE (V) Figure 30. Slew Rate vs. Output Step 3 INPUT 2 OUTPUT 1 0 1V/DIV –1 Figure 31. Input Overdrive Recovery From Positive Rail ±2.5V ...
Page 11
... FREQUENCY (MHz) Figure 36. PSRR vs. Frequency – kΩ p-p OUT –20 –30 –40 –50 –60 –70 –80 –90 –100 0 FREQUENCY (MHz) Figure 37. ADA4891-2 (SOIC) Crosstalk (Output-to-Output) vs. Frequency 1 –2 0 604Ω F 0.8 0 +125° +25° –40°C 0 +125° +25° – ...
Page 12
... Note that a bias current cancellation resistor is not required in 10µF the noninverting input of the amplifier because the input bias current of the ADA4891 is very low (less than 10 pA). Therefore, the dc errors caused by the bias current are negligible. For both configurations often useful to increase the R to decrease the loading on the output ...
Page 13
... 649Ω 100 cannot be adjusted reduce F Rev Page ADA4891-1/ADA4891-2 , forms a zero with the feedback resistor, F value, use the equation R × × the input stray capacitance the feedback capacitor. This is the condition F is determined empirically ...
Page 14
... ADA4891-1/ADA4891-2 DRIVING CAPACITIVE LOADS A highly capacitive load reacts with the output impedance of the amplifiers, causing a loss of phase margin and subsequent peaking or even oscillation shown in Figure 45 and Figure 46. Four methods that minimize the output capacitive loading effect include: • Reducing the output resistive load. This pushes the pole further away and, hence, improves the phase margin. • ...
Page 15
... DAC/encoder to eliminate the multiple images that are created during the sampling process within the DAC. For portable video applications, the ADA4891 is an ideal choice due to its lower power requirements and high performance. For active filters, a good rule of thumb is that the amplifiers − ...
Page 16
... Therefore imperative that the board be thoroughly cleaned and the board surface be free of contaminants to take full advantage of the low input bias currents of the ADA4891. To significantly reduce leakage paths, a guard-ring/shield should be used around the inputs. The guard-ring circles the input pins and is driven to the same potential as the input signal, thereby reducing the potential difference between pins ...
Page 17
... MIN 0.95 MIN SEATING 0.50 MAX PLANE 0.35 MIN COMPLIANT TO JEDEC STANDARDS MO-178-AA Figure 56. 5-Lead Small Outline Transistor Package [SOT-23] (RJ-5) Dimensions shown in millimeters Rev Page ADA4891-1/ADA4891-2 0.50 (0.0196) 45° 0.25 (0.0099) 1.27 (0.0500) 0.40 (0.0157) 0.55 10° 0.45 0.20 5° ...
Page 18
... ADA4891-2ARZ −40°C to +125°C ADA4891-2ARZ-RL −40°C to +125°C ADA4891-2ARZ-R7 −40°C to +125°C ADA4891-2ARMZ −40°C to +125°C ADA4891-2ARMZ-RL −40°C to +125°C ADA4891-2ARMZ-R7 −40°C to +125° RoHS Compliant Part. 3.20 3.00 2.80 5. 3.20 4 ...
Page 19
... NOTES Rev Page ADA4891-1/ADA4891-2 ...
Page 20
... ADA4891-1/ADA4891-2 NOTES ©2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D08054-0-6/10(A) Rev Page ...