ADA4855-3 Analog Devices, ADA4855-3 Datasheet
ADA4855-3
Specifications of ADA4855-3
Available stocks
Related parts for ADA4855-3
ADA4855-3 Summary of contents
Page 1
... V. The ADA4855-3 offers a typical low power of 7.8 mA per amplifier and is capable of delivering load current. It also features a power-down function for power sensitive applications that reduces the supply current down ...
Page 2
... ADA4855-3 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Connection Diagram ....................................................................... 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... Operation ............................................................................... 3 3.3 V Operation ............................................................................ 4 Absolute Maximum Ratings ............................................................ 5 Thermal Resistance ...................................................................... 5 Maximum Power Dissipation ..................................................... 5 ESD Caution .................................................................................. 5 Pin Configuration and Function Descriptions ............................. 6 Typical Performance Characteristics ............................................. 7 Test Circuits ..................................................................................... 13 REVISION HISTORY 11/08—Revision 0: Initial Version ...
Page 3
... 0 4 –0 HD2 ≤ −60 dBc Ω Off ∆ Rev Page ADA4855-3 Min Typ Max 410 200 210 120 53 50 870 5.3/9.5 7.4/7 −84/−105 −60/−66 −90 6.8 2 0.01 ...
Page 4
... ADA4855-3 3.3 V OPERATION T = 25° 3 150 Ω, 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 Harmonic Distortion (HD2/HD3) Crosstalk, Output to Output Input Voltage Noise Input Current Noise Differential Gain Error ...
Page 5
... JA 16-Lead LFCSP 67 MAXIMUM POWER DISSIPATION The maximum power that can be safely dissipated by the Rating ADA4855-3 is limited by the associated rise in junction 6 V temperature. The maximum safe junction temperature for See Figure 3 plastic encapsulated devices is determined by the glass (−V − 0 (+V − ...
Page 6
... OUT2 − OUT1 15 −IN1 16 +IN1 17 (EPAD) Exposed Pad (EPAD ADA4855-3 +IN2 2 11 OUT2 TOP VIEW –IN2 (Not to Scale NOTES CONNECT. 2. EXPOSED PAD CONNECTED TO – Figure 4. Pin Configuration Description No Connect. Noninverting Input 2. ...
Page 7
... V = 3.3V S – 100 FREQUENCY (MHz) Figure 9. Large Signal Frequency Response vs. Gain 4.4pF 2.2pF F –1 –2 –3 –4 –5 – 100 FREQUENCY (MHz) Figure 10. Small Signal Frequency Response vs. Capacitive Load ADA4855 1000 1.4V p-p OUT 1000 C = 6.6pF F 1000 ...
Page 8
... ADA4855-3 0.2 0 –0 5V p-p S OUT –0.2 –0.3 –0.4 –0 FREQUENCY (MHz) Figure 11. 0.1 dB Flatness vs. Supply Voltage +85° +105° –40°C A –1 –2 –3 –4 –5 – FREQUENCY (MHz) Figure 12. Small Signal Frequency Response vs. Temperature – ...
Page 9
... Figure 21. Common-Mode Rejection Ratio (CMRR) vs. Frequency 100 10M 10 Figure 22. Input Voltage Noise vs. Frequency Rev Page ADA4855-3 IN2, IN3, OUT1 IN1, IN2, OUT3 IN1, IN3, OUT2 10 100 1000 FREQUENCY (MHz) Figure 20. Crosstalk vs. Frequency 0 100 FREQUENCY (MHz) ...
Page 10
... ADA4855 0.06 0.04 0.02 0 –0.02 –0.04 –0.06 –0.08 TIME (10ns/DIV) Figure 23. Small Signal Transient Response vs. Supply Voltage 0.08 0.06 0. 2.2pF 4.4pF L = 6.6pF C 0. –0.02 –0.04 –0.06 –0.08 TIME (10ns/DIV) Figure 24. Small Signal Transient Response vs. Capacitive Load 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 TIME (10ns/DIV) Figure 25. Large Signal Transient Response vs. Load Resistance R = 150Ω ...
Page 11
... Figure 32. Output Overdrive Recovery 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 Figure 33. Turn-On/Turn-Off Time 0.5 0.4 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 –0 3.3V S –0.5 Figure 34. Settling Time Rev Page ADA4855-3 2 × TIME (50ns/DIV OUT –1 –2 –3 TIME (1µs/DIV) INPUT ERROR TIME (2ns/DIV) ...
Page 12
... ADA4855-3 0 –10 –20 – 3.3V S –40 –50 –60 0 0.5 1.0 1.5 2.0 2.5 3.0 COMMON-MODE VOLTAGE (V) Figure 35. Input Offset Voltage vs. Common-Mode Voltage 23 23.4 23.2 23.0 22.8 22 3.3V S 22.4 22.2 22.0 21.8 –40 –25 – TEMPERATURE (°C) Figure 36. Quiescent Current vs. Temperature 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 –40 – TEMPERATURE (°C) Figure 37. Offset Drift vs. Temperature 3.5 4.0 4.5 5 ...
Page 13
... S Figure 42. Typical Capacitive Load Configuration 0.1µF V OUT OUT R L 0.1µF V OUT Rev Page ADA4855 10µF 1kΩ 0.1µF 0.1µF 1kΩ V 1kΩ 53.6Ω 1kΩ 10µF 0.1µF –V S Figure 43. Common-Mode Rejection +V S 10µF 0.1µF ...
Page 14
... ADA4855-3 THEORY OF OPERATION The ADA4855 is a voltage feedback op amp that employs a new input stage that achieves a high slew rate while maintaining a wide common-mode input range. The input common-mode range of the ADA4855 extends from 200 mV below the negative rail below the positive rail. This feature makes the ADA4855 ideal for single-supply applications ...
Page 15
... G V – IN ADA4855-3 0.1µF + 0.1µF 10µF –V S Figure 48. Inverting Gain Configuration 20 MHz ACTIVE LOW-PASS FILTER The ADA4855-3 triple amplifier lends itself to higher order active filters. Figure 49 shows a 20 MHz, 6-pole, Sallen-Key low-pass filter. 1 Large Signal 0.1 dB Flatness (MHz OUT The filter has a gain of approximately 6 dB and flat frequency response out to 14 MHz ...
Page 16
... Figure 51. RGB Video Driver DRIVING MULTIPLE VIDEO LOADS Each amplifier in the ADA4855-3 can drive up to three video loads simultaneously, as shown in Figure 52. When driving three video loads, the ADA4855-3 maintains its excellent performance for 0.1 dB flatness and 3 dB bandwidth. Figure 53 shows the large signal frequency response of the ADA4855-3 with three different load configurations: 150 Ω ...
Page 17
... SINGLE-SUPPLY OPERATION The ADA4855-3 is designed for a single power supply. Figure 54 shows the schematic for a single 5 V supply video driver. The input signal is ac-coupled into the amplifier via C1. Resistor R2 and Resistor R4 establish the input midsupply reference for the amplifier. C5 prevents constant current from being drawn through the gain set resistor ...
Page 18
... ADA4855-3 OUTLINE DIMENSIONS PIN 1 INDICATOR 12° MAX 1.00 0.85 0.80 ORDERING GUIDE Model Temperature Range 1 ADA4855-3YCPZ-R2 –40°C to +105°C 1 ADA4855-3YCPZ-R7 –40°C to +105°C 1 ADA4855-3YCPZ-RL –40°C to +105° RoHS Compliant Part. 4.00 BSC SQ 0.60 MAX 0.65 BSC TOP 3.75 VIEW BSC SQ 0.75 0.60 0.50 0.80 MAX 0.65 TYP 0.05 MAX 0.02 NOM ...
Page 19
... NOTES Rev Page ADA4855-3 ...
Page 20
... ADA4855-3 NOTES ©2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D07685-0-11/08(0) Rev Page ...