RH6200M Low Noise, High Speed Rail-to-Rail Op Amp DESCRIPTION ABSOLUTE MAXIMUM RATINGS The RH6200 is an ultralow noise, rail-to-rail input and output unity-gain stable op amp that features 0.95nV/√Hz noise voltage. This amplifier combines very low noise with a 165MHz gain bandwidth, 50V/μs slew rate and is optimized for low voltage signal conditioning systems. A shutdown pin reduces supply current during standby conditions and thermal shutdown protects the part from overload conditions. The RH6200 maintains its preirradiation performance for supplies from 4.5V to 12.6V and is specified pre- and post-radiation at 5V and ±5V. Total Supply Voltage (V+ to V–) .............................. 12.6V Input Current (Note 2) ......................................... ±40mA Output Short-Circuit Duration (Note 3) ............ Indefinite Pin Current While Exceeding Supplies (Note 4) ...±30mA Operating Junction Temperature Range (Note 5) ............................................. –55°C to 125°C Storage Temperature Range .................. –65°C to 150°C Lead Temperature (Soldering, 10 sec)................... 300°C (Note 1) BURN-IN CIRCUIT L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. PACKAGE/ORDER INFORMATION 10k 6.3V 3 200Ω 4 – 8 7 ORDER PART NUMBER RH6200MW SHDN 1 NC 2 –IN 3 + 5 10k TOP VIEW 8 V+ 7 OUT V– 5 6 NC –6.3V W PACKAGE 10-LEAD CERPAC TABLE 1: ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER VOS Input Offset Voltage Input Bias Current IB Input Offset Current 9 NC +IN 4 RH6200M F01 IOS 10 NC – + CONDITIONS VS = 5V, 0V; VCM = V – to V+ VS = ±5V; VCM = V – to V+ VS = 5V, 0V; VCM = V+ VS = 5V, 0V; VCM = V – VS = ±5V; VCM = V+ VS = ±5V; VCM = V – VS = 5V, 0V; VCM = V+ VS = 5V, 0V; VCM = V – VS = ±5V; VCM = V+ VS = ±5V; VCM = V – NOTES (Preirradiation) TA = 25°C TYP 0.6 2.5 8 –50 –23 8 –50 –23 0.02 0.4 1 3 MIN –55°C ≤ TA ≤ 125°C SUBMAX GROUP MIN TYP MAX 2 1 4 6 1 9 18 1 20 1 –100 18 1 20 1 –200 4 1 5 5 1 25 7 1 12 12 1 50 SUBGROUP 2,3 2,3 2,3 2,3 2,3 2,3 2,3 2,3 2,3 2,3 UNITS mV mV μA μA μA μA μA μA μA μA rh6200mfa 1 RH6200M TABLE 1: ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER Input Noise Voltage en Input Noise Voltage Density in AVOL Input Noise Current Density Large Signal Open-Loop Voltage Gain CMRR Common Mode Rejection Ratio PSRR Power Supply Rejection Ratio VOL Output Voltage Swing Low VOH Output Voltage Swing High ISC Short-Circuit Current Supply Current CONDITIONS 0.1Hz to 10Hz VS = 5V, 0V; f = 100kHz VS = 5V, 0V; f = 10kHz VS = ±5V; f = 100kHz VS = ±5V; f = 10kHz f = 10kHz Balanced Source f = 10kHz Unbalanced Source VS = 5V, 0V; RL = 1k; VOUT = 0.5V to 4.5V VS = 5V, 0V; RL = 100Ω; VOUT = 1V to 4V VS = 5V, 0V; RL = 100Ω; VOUT = 1.5V to 3.5V VS = ±5V; RL = 1k; VOUT = ±4.5V VS = ±5V; RL = 100Ω; VOUT = ±2V VS = 5V, 0V; VCM = 0V to 5V VS = 5V, 0V; VCM = 1.5V to 3.5V VS = ±5V; VCM = ±5V VS = ±5V; VCM = ±2V VS = ±2.25V to ±5V NOTES 6 6 tON tOFF GBW SR Turn-On Time Turn-On Time Gain Bandwidth Product Slew Rate SHDN from Low to High SHDN from High to Low VS = 5V, 0V; at f = 1MHz VS = ±5V; at f = 1MHz VS = 5V, 0V; AV = –1; RL = 1k; VO = 4V VS = ±5V; AV = –1, RL = 1k; VO = 4V 70 11 115 15 65 85 68 75 60 200 26 90 112 96 100 68 50 100 290 50 110 290 110 190 400 130 210 420 ±60 9 50 150 12 55 150 55 95 220 70 110 225 ±90 20 23 1.8 2.1 –280 16.5 20 1.3 1.6 –200 110 31 35 180 180 145 165 44 50 6 6 VS = 5V, 0V; IL = 0 VS = 5V, 0V; IL = 5mA VS = 5V, 0V; IL = 20mA VS = ±5V; IL = 0 VS = ±5V; IL = 5mA VS = ±5V; IL = 20mA VS = 5V, 0V; IL = 0 VS = 5V, 0V; IL = 5mA VS = 5V, 0V; IL = 20mA VS = ±5V; IL = 0 VS = ±5V; IL = 5mA VS = ±5V; IL = 20mA VS = 5V, 0V or VS = ±5V TA = 25°C SUBTYP MAX GROUP 600 1.1 1.5 0.95 1.4 2.2 3.5 120 18 6 VS = 5V, 0V VS = ±5V IS(SHDN) Shutdown Supply VS = 5V, 0V Current VS = ±5V Shutdown Pin VS = 5V, 0V or VS = ±5V; VSHDN = 0.3V ISHDN Current IS MIN (Preirradiation) 6 6 6 –55°C ≤ TA ≤ 125°C MIN TYP MAX SUBGROUP 2.4 2.3 4 4 4 4 1 1 1 1 1 4 4 4 4 4 4 4 4 4 4 4 4 1 1 1 1 1 1 4 4 35 5,6 5.5 40 7 58 76 63 72 58 5,6 5,6 5,6 2,3 2,3 2,3 2,3 2,3 nV/√Hz nV/√Hz nV/√Hz nV/√Hz pA/√Hz pA/√Hz V/mV V/mV V/mV V/mV dB dB dB dB dB 100 150 350 100 150 350 150 250 500 200 275 550 5,6 5,6 5,6 5,6 5,6 5,6 5,6 5,6 5,6 5,6 5,6 5,6 2,3 mV mV mV mV mV mV mV mV mV mV mV mV mA 30 35 2.2 2.5 2,3 2,3 2,3 2,3 2,3 mA mA mA mA μA ±45 –300 UNITS nVP-P ns ns MHz MHz V/μs V/μs rh6200mfa 2 RH6200M TABLE 1A: ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS Input Offset Voltage VS = 5V, 0V; VCM = V – to V+ VOS VS = ±5V; VCM = V – to V+ IB IOS AVOL CMRR PSRR VOL VOH ISC IS VS = 5V, 0V, VCM = V+ VS = 5V, 0V, VCM = V– VS = ±5V, VCM = V+ VS = ±5V, VCM = V– Input Offset Current VS = 5V, 0V; VCM = V+ VS = 5V, 0V; VCM = V – VS = ±5V; VCM = V+ VS = ±5V; VCM = V– Large Signal Open VS = 5V, 0V; RL = 1k; VOUT = 0.5V to 4.5V Loop Voltage Gain VS = 5V, 0V; RL = 100Ω; VOUT = 1V to 4V VS = ±5V; RL = 1k; VOUT = ±4.5V VS = ±5V; RL = 100Ω; VOUT = ±2V Common Mode VS = 5V, 0V; VCM = 0V to 5V VS = 5V, 0V; VCM = 1.5V to 3.5V Rejection Ratio VS = ±5V; VCM = ±5V VS = ±5V; VCM = ±2V Power Supply VS = ±2.25V to ±5V Rejection Ratio Output Voltage VS = 5V, 0V; IL = 0 Swing Low VS = 5V, 0V; IL = 5mA VS = 5V, 0V; IL = 20mA VS = ±5V; IL = 0 VS = ±5V; IL = 5mA VS = ±5V; IL = 20mA Output Voltage VS = 5V, 0V; IL = 0 Swing High VS = 5V, 0V; IL = 5mA VS = 5V, 0V; IL = 20mA VS = ±5V; IL = 0 VS = ±5V; IL = 5mA VS = ±5V; IL = 20mA Short-Circuit Current VS = 5V, 0V or VS = ±5V Supply Current VS = 5V, 0V VS = ±5V (Postirradiation) TA = 25°C 10KRAD(Si) 20KRAD(Si) 50KRAD(Si) 100KRAD(Si) 200KRAD(Si) MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX 2.2 2.4 2.6 2.8 3 6.5 7 7.5 8 8.5 Input Bias Current 20 –55 22 –60 20 –55 22 –60 5 6 8 13 65 10 110 13.5 64 84 67 74 59 –70 6 7 9 14 –70 7 8 10 15 55 8 90 10.5 62 82 65 72 57 28 –75 26 24 –65 60 9 100 12 63 83 66 73 58 26 24 –65 28 –75 8 9 11 16 50 7 80 9 61 81 64 71 56 9 10 12 17 45 6 70 7.5 60 80 63 70 55 UNITS mV mV μA μA μA μA μA μA μA μA V/mV V/mV V/mV V/mV dB dB dB dB dB 52 104 296 52 114 296 114 198 415 134 218 430 58 20.4 23.4 54 108 302 54 118 302 118 206 430 138 226 455 56 20.8 23.8 56 112 308 56 122 308 122 214 445 142 234 470 54 21.2 24.2 58 116 314 58 126 314 126 222 460 146 242 485 52 21.6 24.6 60 120 320 60 130 320 130 230 475 150 250 500 50 22 25 mV mV mV mV mV mV mV mV mV mV mV mV mA mA mA IS(SHDN) Shutdown Supply Current VS = 5V, 0V VS = ±5V 1.84 2.14 1.88 2.18 1.92 2.22 1.96 2.26 2 2.3 mA mA ISHDN VS = 5V, 0V or VS = ±5V; VSHDN = 0.3V –284 –288 –292 –296 –300 μA Shutdown Pin Current Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: Inputs are protected by back-to-back diodes. If the differential input voltage exceeds 0.7V, the input current must be limited to less than 40mA. Note 3: A heat sink may be required to keep the junction temperature below the absolute maximum rating when the output is shorted indefinitely. Note 4: There are reverse-biased ESD diodes from all inputs and outputs to the respective supply pins. If these pins are forced beyond either supply, unlimited current will flow through these diodes. If the current is transient in nature and limited to less than 30mA, no damage to the device will occur. Note 5: The RH6200 is tested under pulse load conditions such that TJ ≈ TA. The thermal resistance of the W 10-lead CERPAC package (without heat sink) is estimated at 170°C/W. For a given application, multiply the RMS power dissipation of the RH6200 times the package thermal resistance (including any heat sinking if present) to calculate the temperature difference between the ambient temperature and the junction temperature. The RH6200 has a thermal shutdown feature that protects the part from excessive junction temperature. The amplifier will shut down to an inactive, low current condition when the junction temperature exceeds approximately 160°C. The amplifier will remain shut down until the die cools off to below approximately 150°C, at which point the amplifier will return to normal operation. Note 6: This parameter is not production tested. Typical bench evaluation performance listed for information only. rh6200mfa 3 RH6200M TOTAL DOSE BIAS CIRCUIT TABLE 2: ELECTRICAL TEST REQUIREMENTS MIL-STD-883 TEST REQUIREMENTS CF* SUBGROUP Final Electrical Test Requirements (Method 5004) 1*, 2, 3, 4, 5, 6 Group A Test Requirements (Method 5005) 1*, 2, 3, 4, 5, 6 Group B and D for Class S, End Point Electrical Parameters (Method 5005) 10k 1, 2, 3 5V *PDA applies to subgroup 1. See PDA Test Notes. – PDA Test Notes The PDA is specified as 5% based on failures from group A, subgroup 1, tests after cooldown as the final electrical test in accordance with method 5004 of MIL-STD-883. The verified failures of group A, subgroup 1, after burn-in divided by the total number of devices submitted for burn-in in that lot shall be used to determine the percent for the lot. Linear Technology Corporation reserves the right to test to tighter limits than those given. 10k + –5V RH6200 F02 *CF IS COMPONENT OR PARASITIC CAPACITANCE ENSURING STABILITY TYPICAL PERFORMANCE CHARACTERISTICS 80 VS = 5V, 0V 70 70 60 60 NUMBER OF UNITS NUMBER OF UNITS 80 VOS Distribution, VCM = V – 50 40 30 Supply Current vs Supply Voltage 30 VS = 5V, 0V TA = 125°C 25 SUPPLY CURRENT (mA) VOS Distribution, VCM = V + 50 40 30 20 20 10 10 0 –1600–1200 –800 –400 0 400 800 1200 1600 INPUT OFFSET VOLTAGE (μV) 0 –1600–1200 –800 –400 0 400 800 1200 1600 INPUT OFFSET VOLTAGE (μV) RH6200 G01 20 TA = 25°C 15 TA = –55°C 10 5 RH6200 G02 0 0 2 8 12 6 10 4 TOTAL SUPPLY VOLTAGE (V) 14 RH6200 G03 rh6200mfa 4 RH6200M TYPICAL PERFORMANCE CHARACTERISTICS Input Bias Current vs Common Mode Voltage Offset Voltage vs Input Common Mode Voltage 20 VS = 5V, 0V TYPICAL PART 2.5 10 VS = 5V, 0V OUTPUT SATURATION VOLTAGE (V) 3.0 Output Saturation Voltage vs Load Current (Output Low) INPUT BIAS CURRENT (μA) 10 OFFSET VOLTAGE (mV) 2.0 1.5 TA = 125°C 1.0 0.5 TA = 25°C 0 TA = –55°C –0.5 0 –10 TA = –55°C –20 TA = 25°C –30 TA = 125°C –1.0 –40 –1.5 0 –1 5 4 1 3 2 INPUT COMMON MODE VOLTAGE (V) 0 3 5 2 4 1 COMMON MODE VOLTAGE (V) Output Saturation Voltage vs Load Current (Output High) TA = 125°C TA = 25°C TA = –55°C TA = –55°C 0.01 TA = 25°C 0.001 6 0.1 22 20 30 25 NPN ACTIVE VCM = 4.5V 20 15 BOTH ACTIVE VCM = 2.5V 10 100 TA = 125°C 16 14 TA = 25°C 12 10 8 6 TA = –55°C 4 2 10 100 1k 100k 10k 0 0 1 FREQUENCY (Hz) RH6200 G07 2 3 4 SHDN PIN VOLTAGE (V) RH6200 G08 SHDN Pin Current vs SHDN Pin Voltage 70 VS = ±5V 0 60 VS = 5V, 0V GAIN BANDWIDTH (MHz) TA = –55°C –100 TA = 125°C –150 –200 –250 50 PHASE MARGIN VS = ±5V 180 160 VS = 5V, 0V 140 GAIN BANDWIDTH 120 –300 1 2 3 4 5 SHDN PIN VOLTAGE (V) RH6200 G10 40 PHASE MARGIN (DEG) TA = 25°C 0 5 RH6200 G09 Gain Bandwidth and Phase Margin vs Temperature VS = 5V, 0V –50 100 RH6200 G06 VS = 5V, 0V 18 PNP ACTIVE VCM = 0.5V 5 1 10 LOAD CURRENT (mA) 1 10 LOAD CURRENT (mA) Supply Current vs SHDN Pin Voltage VS = 5V, 0V TA = 25°C 35 0 0.01 50 TA = 125°C SUPPLY CURRENT (mA) NOISE VOLTAGE (nV/√Hz) 1 SHDN PIN CURRENT (μA) OUTPUT SATURATION VOLTAGE (V) 45 40 0.1 0.1 Input Noise Voltage vs Frequency VS = 5V, 0V 0.1 1 RH6200 G05 RH6200 G04 10 VS = 5V, 0V 100 –50 –25 0 25 50 75 TEMPERATURE (°C) 100 125 RH6200 G11 rh6200mfa 5 RH6200M TYPICAL PERFORMANCE CHARACTERISTICS Open-Loop Gain vs Frequency 120 PHASE 60 VCM = 0.5V VCM = 4.5V 40 30 20 20 0 VCM = 4.5V 10 VCM = 0.5V –20 1M –80 60 VS = ±2.5V RISING 40 VS = ±5V AV = –1 TA = 25°C 0 –55 –35 –15 1G RH6200 G12 VOUT 500Ω + 100 1mV 1mV 50 10mV 10mV 0 –4 5 25 45 65 85 105 125 TEMPERATURE (°C) –3 –2 1 2 –1 0 OUTPUT STEP (V) 3 4 RH6200 G14 5V Large-Signal Response Distortion vs Frequency, AV = 1 AV = 1 VO = 2VP-P –60 VS = ±5V 1mV 5V VOUT DISTORTION (dBc) VIN – 100 1mV –70 10mV 10mV 1V/DIV HD2, RL = 1k –80 HD2, RL = 100Ω 0V –90 50 HD3, RL = 1k –100 HD3, RL = 100Ω 0 –3 VIN RH6200 G13 500Ω 500Ω + –4 150 – –50 150 SETTLING TIME (ns) VS = ±5V FALLING 80 VS = ±5V AV = 1 TA = 25°C 20 Settling Time vs Output Step (Inverting) 200 VS = ±5V RISING VS = ±2.5V FALLING –60 10M 100M FREQUENCY (Hz) 200 AV = –1 RF = RG = 1k RL = 1k 100 –40 VS = 5V, 0V CL = 5pF RL = 1k –20 100k SLEW RATE (V/μs) GAIN PHASE (DEG) GAIN (dB) 60 40 –10 120 80 50 0 140 100 SETTLING TIME (ns) 80 70 Settling Time vs Output Step (Noninverting) Slew Rate vs Temperature –2 1 2 –1 0 OUTPUT STEP (V) 3 4 RH6200 G15 –110 100k 1M FREQUENCY (Hz) 10M VS = 5V, 0V AV = 1 RL = 1k 200ns/DIV RH6200 G17 RH6200 G16 rh6200mfa 6 RH6200M TYPICAL PERFORMANCE CHARACTERISTICS Offset Voltage ±5V Large-Signal Response Offset Voltage 0.0 0.0 2V/DIV 0V VS = ±5V AV = 1 RL = 1k 200ns/DIV –1.0 –1.5 –2.0 –2.5 RH6200 G18 –1.5 –2.0 –2.5 –3.0 –4.0 1 10 100 TOTAL DOSE KRAD (Si) RH6200 G19 1.5 1.0 0.5 VS = 5V, 0V VCM = 5V VARIOUS UNITS VS = 5V, 0V 20 0.5 0.0 –0.5 VCM = 5V 10 0 –10 VCM = 0V –20 –30 –1.0 0.0 1 10 100 TOTAL DOSE KRAD (Si) 1000 RH6200 G21 1000 RH6200 G20 Input Bias Current 30 INPUT BIAS CURRENT (μA) VS = 5V, 0V VCM = 0V VARIOUS UNITS 10 100 TOTAL DOSE KRAD (Si) 1 1000 Offset Voltage 1.0 OFFSET VOLTAGE (mV) OFFSET VOLTAGE (mV) –1.0 –3.5 –3.0 Offset Voltage 2.0 VS = ±5V VCM = 5V VARIOUS UNITS –0.5 OFFSET VOLTAGE (mV) OFFSET VOLTAGE (mV) VS = ±5V VCM = –5V –0.5 VARIOUS UNITS 1 10 100 TOTAL DOSE KRAD (Si) 1000 RH6200 G22 1 10 100 TOTAL DOSE KRAD (Si) 1000 RH6200 G23 rh6200mfa 7 RH6200M TYPICAL PERFORMANCE CHARACTERISTICS Open-Loop Voltage Gain, RL = 1k Input Bias Current 30 200 VS = ±5V 10 0 –10 VCM = –5V –20 25 VS = ±5V 150 OPEN LOOP GAIN (V/mV) VCM = 5V OPEN LOOP GAIN (V/mV) 125 VS = 5V, 0V 100 75 50 0 –30 1 10 100 TOTAL DOSE KRAD (Si) 10 100 TOTAL DOSE KRAD (Si) RH6200 G24 Common Mode Rejection Ratio 110 CMRR (dB) CMRR (dB) 90 VCM = –2V to 2V 100 90 80 VCM = 0V to 5V 70 70 1000 RH6200 G27 10 100 TOTAL DOSE KRAD (Si) 1000 RH6200 G26 Power Supply Rejection Ratio 80 VCM = –5V to 5V 10 100 TOTAL DOSE KRAD (Si) 1 RH6200 G25 VCM = 1.5V to 3.5V 1 10 1000 VS = ±5V 110 100 VS = 5V, 0V 15 Common Mode Rejection Ratio 120 VS = 5V, 0V 80 20 0 1 1000 VS = ±5V 5 25 POWER SUPPLY REJECTION RATIO (dB) INPUT BIAS CURRENT (μA) 30 175 20 120 Open-Loop Voltage Gain, RL = 100Ω VS = ±2.25V TO ±5V 75 70 65 60 55 50 1 10 100 TOTAL DOSE KRAD (Si) 1000 RH6200 G28 1 10 100 TOTAL DOSE KRAD (Si) 1000 RH6200 G29 rh6200mfa 8 RH6200M TYPICAL PERFORMANCE CHARACTERISTICS Output Swing Low Output Swing Low 250 200 LOAD = 20mA 150 100 LOAD = 5mA 50 VS = ±5V LOAD = 20mA 150 100 LOAD = 5mA 50 RH6200 G30 RH6200 G31 LOAD = 5mA NO LOAD 0 Short-Circuit Current 1000 RH6200 G33 SOURCING 90 SINKING 80 70 60 50 1000 RH6200 G32 100 SHORT CIRCUIT CURRENT (mA) SHORT CIRCUIT CURRENT (mA) 150 10 100 TOTAL DOSE KRAD (Si) 10 100 TOTAL DOSE KRAD (Si) 1 1000 SOURCING 200 1 50 Short-Circuit Current LOAD = 20mA 50 10 100 TOTAL DOSE KRAD (Si) 100 VS = ±5V 100 LOAD = 5mA 0 1 1000 Output Swing High 250 100 NO LOAD 0 10 100 TOTAL DOSE KRAD (Si) 150 NO LOAD 0 1 VS = 5V, 0V LOAD = 20mA 200 NO LOAD OUTPUT SWING HIGH (mV) Output Swing High 200 OUTPUT SWING HIGH (mV) VS = 5V, 0V OUTPUT SWING LOW (mV) OUTPUT SWING LOW (mV) 250 VS = 5V, 0V 1 10 100 TOTAL DOSE KRAD (Si) 90 70 60 50 1000 SINKING 80 VS = ±5V 1 RH6200 G34 10 100 TOTAL DOSE KRAD (Si) 1000 RH6200 G35 rh6200mfa Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 9 RH6200M TYPICAL PERFORMANCE CHARACTERISTICS Supply Current Shutdown Supply Current Shutdown Pin Current VS = ±5V 20 VS = 5V, 0V 15 10 0 SHUTDOWN PIN CURRENT (μA) 2.0 SHUTDOWN SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) 25 VS = ±5V 1.5 VS = 5V, 0V 1.0 0.5 1000 –100 –150 VS = ±5V –200 VS = 5V, 0V –250 –300 0.0 10 100 TOTAL DOSE KRAD (Si) 1 –50 1 RH6200 G36 10 100 TOTAL DOSE KRAD (Si) 1000 RH6200 G37 1 10 100 TOTAL DOSE KRAD (Si) 1000 RH6200 G38 REVISION HISTORY REV DATE DESCRIPTION PAGE NUMBER A 11/11 Revised Conditions for AVOL in Table 1: Electrical Characteristics 2 I.D. No. 66-10-1028 0807 rh6200mfa 10 Linear Technology Corporation LT 1111 REV A • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2011