AD8614/AD8644 Single and Quad 18 V Operational …

1 Single and quad 18 V Operational Amplifiers AD8614/AD8644 Rev. B Information furnished by analog devices is believed to be accurate and reliable. However, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of analog devices . Trademarks and registered trademarks are the property of their respective owners. One Technology Way, Box 9106, Norwood, MA 02062-9106, : Fax: 1999 2007 analog devices , Inc. All rights reserved. FEATURES Unity-gain bandwidth: MHz Low voltage offset: mV Slew rate: V/ s Single -supply operation: 5 V to 18 V High output current: 70 mA Low supply current: 800 A/ amplifier Stable with large capacitive loads Rail-to-rail inputs and outputs APPLICATIONS LCD gamma and VCOM drivers Modems Portable instrumentation Direct access arrangement GENERAL DESCRIPTION The AD8614 ( Single ) and AD8644 ( quad ) are Single -supply, MHz bandwidth, rail-to-rail amplifiers optimized for LCD monitor applications.

2 They are processed using the analog devices , Inc. high voltage, extra fast complementary bipolar (HV XFCB) process. This proprietary process includes trench-isolated transistors that lower internal parasitic capacitance, which improves gain bandwidth, phase margin, and capacitive load drive. The low supply current of 800 A (typical) per amplifier is critical for portable or densely packed designs. In addition, the rail-to-rail output swing provides greater dynamic range and control than standard video amplifiers provide. These products operate from supplies of 5 V to as high as 18 V. The unique combination of an output drive of 70 mA, high slew rates, and high capacitive drive capability makes the AD8614/AD8644 an ideal choice for LCD applications. The AD8614 and AD8644 are specified over the temperature range of 20 C to +85 C.

3 They are available in 5-lead SOT-23, 14-lead TSSOP, and 14-lead SOIC surface-mount packages in tape and reel. PIN CONFIGURATIONS OUT A1V 2+IN3 IN4V+5AD8614 TOP VIEW(Not to Scale)06485-001 Figure 1. 5-Lead SOT-23 (RJ-5) AD8644 TOP VIEW(Not to Scale)1234567 IN A+IN AV+OUT B IN B+IN BOUT A141312111098 IN D+IN DV OUT C IN C+IN COUT D06485-002 Figure 2. 14-Lead TSSOP (RU-14) OUT A1 IN A2+IN A3V+4 OUT D14 IN D13+IN D12V 11+IN B5+IN C10 IN B6 IN C9 OUT B7 OUT C8AD8644 TOP VIEW(Not to Scale)06485-003 Figure 3. 14-Lead Narrow Body SOIC (R-14) AD8614/AD8644 Rev. B | Page 2 of 16 TABLE OF CONTENTS Features .. 1 1 General Description .. 1 Pin Configurations .. 1 Revision History .. 2 3 Electrical Characteristics .. 3 Absolute Maximum 4 Thermal Resistance .. 4 ESD 4 Typical Performance Characteristics .. 5 Theory of Operation.

4 9 Output Short-Circuit Input Overvoltage Protection .. 10 Output Phase 10 Power 10 Unused Amplifiers .. 10 Capacitive Load Drive .. 11 Direct Access Arrangement .. 11 A One-Chip Headphone/Microphone Preamplifier 11 Outline Dimensions .. 13 Ordering Guide .. 14 REVISION HISTORY 9/07 Rev. A to Rev B Change to Current Noise Density in Table 1 .. 3 12/06 Rev. 0 to Rev. A Updated Format ..Universal Deleted SPICE Model Availability 12 Updated Outline Dimensions .. 13 Changes to Ordering Guide .. 14 10/99 Revision 0: Initial Version AD8614/AD8644 Rev. B | Page 3 of 16 SPECIFICATIONS ELECTRICAL CHARACTERISTICS 5 V VS 18 V, VCM = VS/2, TA = 25 C, unless otherwise 1. Parameter Symbol Conditions Min Typ Max Unit INPUT CHARACTERISTICS Offset Voltage VOS mV 20 C TA +85 C 3 mV Input Bias Current IB 80 400 nA

5 20 C TA +85 C 500 nA Input Offset Current IOS 5 100 nA 20 C TA +85 C 200 nA Input Voltage Range 0 VS V Common-Mode Rejection Ratio CMRR VCM = 0 V to VS 60 75 dB Voltage Gain AVO VOUT = V to VS V.

6 RL = 10 k 10 150 V/mV OUTPUT CHARACTERISTICS Output Voltage High VOH ILOAD = 10 mA VS V Output Voltage Low VOL ILOAD = 10 mA 65 150 mV Output Short-Circuit Current ISC 35 70 mA 20 C TA +85 C 30 mA POWER SUPPLY Power Supply Rejection Ratio PSRR VS = V to V 80 110 dB Supply Current/ amplifier ISY mA 20 C TA +85 C mA DYNAMIC PERFORMANCE Slew Rate SR CL = 200 pF V/ s Gain Bandwidth Product GBP MHz Phase Margin o 65 Degrees Settling Time tS , 10 V step 3 s NOISE PERFORMANCE Voltage Noise Density en f = 1 kHz 12 nV/ Hz en f = 10 kHz 11 nV/ Hz Current Noise Density in f = 10 kHz 1 pA/ Hz 1 All typical values are for VS = 18 V.

7 AD8614/AD8644 Rev. B | Page 4 of 16 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Rating Supply Voltage 20 V Input Voltage GND to VS Storage Temperature Range 65 C to +150 C Operating Temperature Range 20 C to +85 C Junction Temperature Range 65 C to +150 C Lead Temperature Range (Soldering, 60 sec) 300 C Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the Operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

8 THERMAL RESISTANCE JA is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. Table 3. Thermal Resistance Package Type JA JC Unit 5-Lead SOT-23 (RJ) 230 140 C/W 14-Lead TSSOP (RU) 180 35 C/W 14-Lead SOIC (R) 120 56 C/W ESD CAUTION AD8614/AD8644 Rev. B | Page 5 of 16 TYPICAL PERFORMANCE CHARACTERISTICSCAPACITANCE (pF)50450403530252015105 OSSMALL SIGNAL OVERSHOOT (%)VS=18 VRL=2k TA=25 C101001k10k+OS06485-004 Figure 4. Small Signal Overshoot vs. Load Capacitance 12 12840 4 TIME ( s)OUTPUT SWING FROM 0 TO Figure 5. Output Swing vs. Settling Time GAIN (dB)FREQUENCY (Hz)8060402004590135180 PHASE SHIFT (Degrees)1k10k100k1M10M100M5V VS 18 VRL=1M CL=40pFTA= 25 C06485-006 Figure 6. Open-Loop Gain and Phase Shift vs. Frequency VOLTAGE (1V/DIV) (1 s/DIV)VS=5 VRL=2k CL=200pFAV=1TA=25 C06485-007 Figure 7.

9 Large Signal Transient Response, VS = 5 V VOLTAGE (4V/DIV)2925211713951 3 7 11VS=18 VRL=2k CL=200pFAV=1TA= 25 CTIME (1 s/DIV)06485-008 Figure 8. Large Signal Transient Response, VS = 18 V TIME (500ns/DIV)VS2 VOLTAGE (50mV/DIV)VS=5V VS 18 VRL=2k CL= 200pFAV=1TA= 25 C06485-009 Figure 9. Small Signal Transient Response AD8614/AD8644 Rev. B | Page 6 of 16 LOAD CURRENT (mA)1011001k10k OUTPUT VOLTAGE (mV)5V VS 18 VTA=25 Figure 10. Output Voltage to Supply Rail vs. Load Current 10004000900500300100700600200800 SUPPLY CURRENT/ amplifier ( A)012345678910 SUPPLY VOLTAGE ( V)TA= 25 C06485-011 Figure 11. Supply Current vs. Supply Voltage 4000 400300200 200 300100 100 INPUT BIAS CURRENT (nA)COMMON-MODE VOLTAGE (V) Figure 12. Input Bias Current vs. Common-Mode Voltage, VS = V COMMON-MODE VOLTAGE (V)4000 400300200 200 300100 100 INPUT BIAS CURRENT (nA)VS= 9V 9 7 5 3 101357906485-013 Figure 13.

10 Input Bias Current vs. Common-Mode Voltage, VS = 9 V INPUT OFFSET VOLTAGE (mV)QUANTITY (Amplifiers) VS 9 VTA= 25 Figure 14. Input Offset Voltage Distribution SUPPLY CURRENT/ amplifier (mA) ( C) 35 1552545658506485-015 Figure 15. Supply Current vs. Temperature AD8614/AD8644 Rev. B | Page 7 of 16 FREQUENCY (Hz)OUTPUT SWING (V p-p)65043211001k10k100k1M10 MVS=5 VAVCL=1RL=2k TA= 25 C06485-016 Figure 16. Maximum Output Swing vs. Frequency, VS = 5 V FREQUENCY (Hz)OUTPUT SWING (V p-p)201801062481614121001k10k100k1M10 MVS= 18 VAVCL=1RL=2k TA= 25 C06485-017 Figure 17. Maximum Output Swing vs. Frequency, VS = 18 V FREQUENCY (Hz)IMPEDANCE ( )3002400180120605V VS 18 VTA=25 CAV=1AV=10AV=1001k10k100k1M10M06485-018 Figure 18. Closed-Loop Output Impedance vs. Frequency FREQUENCY (Hz)GAIN (dB)402001k10k100k1M10M100M5V VS 18 VTA=25 C06485-019 Figure 19.