LT1722/LT1723/LT1724 Single, Dual, Quad 200MHz Low Noise Precision Op Amps U FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ DESCRIPTIO 3.8nV/√Hz Input Noise Voltage 3.7mA Supply Current 200MHz Gain Bandwidth Low Total Harmonic Distortion: – 85dBc at 1MHz 70V/µs Slew Rate 400µV Maximum Input Offset Voltage 300nA Maximum Input Bias Current Unity-Gain Stable Capacitive Load Stable Up to 100pF 23mA Minimum Output Current Specified at ±5V and Single 5V U APPLICATIO S ■ ■ ■ ■ ■ ■ The LT®1722/LT1723/LT1724 are single/dual/quad, low noise, low power, high speed operational amplifiers. These products feature lower input offset voltage, lower input bias current and higher DC gain than devices with comparable bandwidth. The 200MHz gain bandwidth ensures high open-loop gain at video frequencies. The low input noise voltage is achieved with reduced supply current. The total noise is optimized for a source resistance between 0.8k and 12k. Due to the input bias current cancellation technique used, the resistance seen by each input does not need to be balanced. The output drives a 150Ω load to ±3V with ±5V supplies. On a single 5V supply the output swings from 1.5V to 3.5V with a 500Ω load connected to 2.5V. The amplifier is unitygain stable (CLOAD ≤ 100pF). Video and RF Amplification ADSL, HDSL II, VDSL Receivers Active Filters Wideband Amplifiers Buffers Data Acquisition Systems , LTC and LT are registered trademarks of Linear Technology Corporation. The LT1722/LT1723/LT1724 are manufactured on Linear Technology’s advanced low voltage complementary bipolar process. The LT1722 is available in the SO-8 and 5-pin SOT-23 packages. The LT1723 is available in the SO-8 and MS8 packages. The LT1724 is available in the 14-lead SO package. U TYPICAL APPLICATIO Differential Video Line Driver C1 5pF Line Driver Mulitburst Video Signal R3 750Ω R5 2k – R7 62.5Ω +VOUT 0.5V/DIV 1/2 LT1723 + VIN 75Ω SOURCE 125Ω CAT-5 TWISTED PAIR VIN C2 5pF R2 2k R1 75Ω VIN /2 62.5Ω +VOUT LOAD VIN 1V/DIV –VOUT 62.5Ω –VIN /2 LOAD –VOUT 0.5V/DIV R4 2k – R6 62.5Ω 1723 TA01 1/2 LT1723 + 1723 TA02 –VIN 172234fa 1 LT1722/LT1723/LT1724 U W W W ABSOLUTE AXI U RATI GS (Note 1) Total Supply Voltage (V + to V –) ............................ 12.6V Input Voltage ........................................................... ±VS Differential Input Voltage (Note 2) ........................ ±0.7V Input Current (Note 2) ........................................ ±10mA Output Short-Circuit Duration (Note 3) ............ Indefinite Operating Temperature Range (Note 4)...–40°C to 85°C Specified Temperature Range (Note 5) ... –40°C to 85°C Maximum Junction Temperature .......................... 150°C Storage Temperature Range ................. –65°C to 150°C Lead Temperature (Soldering, 10 sec)................. 300°C U W U PACKAGE/ORDER I FOR ATIO ORDER PART NUMBER TOP VIEW NC 1 – + –IN 2 +IN 3 V– 4 8 NC 7 V+ 6 OUT 5 NC S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150°C, θJA = 150°C/W –IN A 2 8 A +IN A 3 B V– 4 V+ 7 OUT B 6 –IN B 5 +IN B S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150°C, θJA = 190°C/W TOP VIEW 14 OUT D OUT A 1 –IN A 2 +IN A 3 – A + – 13 –IN D D + 12 +IN D V+ 4 +IN B 5 –IN B 6 OUT B 7 11 V – + B – C TOP VIEW 5 V+ OUT 1 V– 2 + +IN 3 S8 PART MARKING 1722 1722I – LT1723CS8 LT1723IS8 S8 PART MARKING 1723 1723I LT1722CS5 LT1722IS5 4 –IN S5 PACKAGE 5-LEAD PLASTIC SOT-23 TJMAX = 150°C, θJA = 250°C/W ORDER PART NUMBER TOP VIEW OUT A 1 LT1722CS8 LT1722IS8 ORDER PART NUMBER S5 PART MARKING* LTZB ORDER PART NUMBER TOP VIEW OUT A –IN A +IN A V– 1 2 3 4 A B 8 7 6 5 V+ OUT B –IN B +IN B MS8 PACKAGE 8-LEAD PLASTIC MSOP TJMAX = 150°C, θJA = 250°C/W LT1723CMS8 LT1723IMS8 MS8 PART MARKING LTYC LTZA ORDER PART NUMBER LT1724CS LT1724IS + 10 +IN C – 8 –IN C 8 OUT C S PACKAGE 14-LEAD PLASTIC SO TJMAX = 150°C, θJA = 100°C/W Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grades are identified by a label on the shipping container. 172234fa 2 LT1722/LT1723/LT1724 ELECTRICAL CHARACTERISTICS SYMBOL VOS PARAMETER Input Offset Voltage IOS IB en in RIN Input Offset Current Input Bias Current Input Noise Voltage Input Noise Current Input Resistance CIN CMRR PSRR AVOL Input Capacitance Input Voltage Range + Input Voltage Range – Common Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain VOUT Output Swing IOUT ISC SR Output Current Short-Circuit Current Slew Rate Full Power Bandwidth Gain Bandwidth Settling Time GBW tS tr, tf RO IS Rise Time, Fall Time Overshoot Propagation Delay Output Resistance Channel Separation Supply Current TA = 25°C, VS = ±5V, VCM = 0V, unless otherwise noted. CONDITIONS (Note 6) LT1722 SOT-23 and LT1723 MS8 f = 10kHz f = 10kHz VCM = ±3.5V Differential MIN 5 3.5 VCM = ±3.5V VS = ±2.3V to ± 5.5V VOUT = ±3V, RL = 500Ω VOUT = ±3V, RL = 150Ω RL = 500Ω, VIN = ±10mV RL = 150Ω, VIN = ±10mV VOUT = ±3V, 10mV Overdrive VOUT = 0V, VIN = ±1V AV = –1, (Note 7) 3V peak, (Note 8) f = 200kHz AV = –1, 2V, 0.1% AV = –1, 2V, 0.01% AV = 1, 10% to 90%, VIN = 0.2VP-P, RL = 150Ω AV = 1, VIN = 0.2VP-P, RL = 150Ω, RF = 0Ω 50% VIN to 50% VOUT = 0.2VP-P, RL = 150Ω AV = 1, f = 1MHz VOUT = ±3V, RL = 150Ω Per Amplifier 80 78 10 7 ±3.2 ±3.1 23 35 45 115 82 TYP 100 150 40 40 3.8 1.2 35 50 2 4 –4 100 90 17 14 ±3.8 ±3.4 50 90 70 3.7 200 91 112 6 15 3 0.15 90 3.7 MAX 400 650 300 300 TYP 250 350 20 20 4 1.1 32 55 2 4 1 100 10 3.8 0.9 MAX 550 800 300 300 –3.5 4.5 UNITS µV µV nA nA nV/√Hz pA/√Hz MΩ kΩ pF V V dB dB V/mV V/mV V V mA mA V/µs MHz MHz ns ns ns % ns Ω dB mA TA = 25°C. VS = 5V, VCM = 2.5V, RL to 2.5V, unless otherwise noted. SYMBOL VOS PARAMETER Input Offset Voltage IOS IB en in RIN Input Offset Current Input Bias Current Input Noise Voltage Input Noise Current Input Resistance CIN Input Capacitance Input Voltage Range + Input Voltage Range – Common Mode Rejection Ratio Large-Signal Voltage Gain Output Swing+ Output Swing– CMRR AVOL VOUT CONDITIONS (Note 6) LT1722 SOT-23 and LT1723 MS8 f = 10kHz f = 10kHz VCM = 1.5V to 3.5V Differential MIN 5 3.5 VCM = 1.5V to 3.5V VOUT = 1.5V to 3.5V, RL = 500Ω RL = 500Ω, VIN = ±10mV RL = 500Ω, VIN = ±10mV 80 4 3.6 1.5 1.4 UNITS µV µV nA nA nV/√Hz pA/√Hz MΩ kΩ pF V V dB V/mV V V 172234fa 3 LT1722/LT1723/LT1724 ELECTRICAL CHARACTERISTICS SYMBOL IOUT ISC SR GBW tr, tf RO IS PARAMETER Output Current Short-Circuit Current Slew Rate Full Power Bandwidth Gain Bandwidth (Note 10) Rise Time, Fall Time Overshoot Propagation Delay Output Resistance Channel Separation Supply Current TA = 25°C. VS = 5V, VCM = 2.5V, RL to 2.5V, unless otherwise noted. CONDITIONS VOUT = 3.5V or 1.5V, 10mV Overdrive VOUT = 2.5V, VIN = ±1V AV = -1, (Note 7) 1V peak, (Note 8) f = 200kHz AV = 1, 10% to 90%, VIN = 0.2VP-P, RL = 500Ω AV = 1, VIN = 0.2VP-P, RL = 500Ω 50% VIN to 50% VOUT, 0.1V, RL = 500Ω AV = 1, f = 1MHz VOUT = 1.5V to 3.5V, RL = 500Ω Per Amplifier MIN 10 22 40 115 82 TYP 20 55 70 8.7 180 5 16 3 0.19 90 3.8 MAX 5 UNITS mA mA V/µs MHz MHz ns % ns Ω dB mA MAX UNITS 700 850 µV µV The ● denotes the specifications which apply over the temperature range of 0°C ≤ TA ≤ 70°C. VS = ±5V, VCM = 0V, unless otherwise noted. (Note 5) SYMBOL PARAMETER CONDITIONS MIN VOS Input Offset Voltage (Note 6) LT1722 SOT-23 and LT1723 MS8 ● ● Input VOS Drift (Note 9) ● TYP 3 7 µV/°C IOS Input Offset Current ● 350 nA IB Input Bias Current ● 350 nA Input Voltage Range + Input Voltage Range – ● ● 3.5 –3.5 V V CMRR Common Mode Rejection Ratio V CM = ±3.5V ● 75 dB PSRR Power Supply Rejection Ratio VS = ±2.3V to ±5.5V ● 76 dB AVOL Large-Signal Voltage Gain VOUT = ±3V, RL = 500Ω V OUT = ±3V, RL = 150Ω ● ● 9 6 V/mV V/mV V OUT Output Swing R L = 500Ω, VIN = ±10mV R L = 150Ω, VIN = ±10mV ● ● ±3.15 ±3.05 IOUT Output Current V OUT = ±3V, 10mV Overdrive ● 22 mA ISC Short-Circuit Current V OUT = 0V, VIN = ±1V ● 30 mA SR Slew Rate A V = –1, (Note 7) ● 35 V/µs GBW Gain Bandwidth f = 200kHz ● 100 MHz Channel Separation V OUT = ±3V, RL = 150Ω ● 81 dB Supply Current Per Amplifier ● IS V V 5.45 mA 172234fa 4 LT1722/LT1723/LT1724 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the temperature range of 0°C ≤ TA ≤ 70°C. VS = 5V, VCM = 2.5V, RL to 2.5V, unless otherwise noted. (Note 5) SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage (Note 6) LT1722 SOT-23 and LT1723MS8 ● ● MIN Input VOS Drift (Note 9) ● TYP 3 IOS Input Offset Current ● IB Input Bias Current ● Input Voltage Range + Input Voltage Range – ● ● 3.5 MAX UNITS 850 950 µV µV 7 µV/°C 350 nA 350 nA 1.5 V V CMRR Common Mode Rejection Ratio VCM = 1.5V to 3.5V ● 75 dB AVOL Large-Signal Voltage Gain VOUT = 1.5V to 3.5V, RL = 500Ω ● 3 V/mV VOUT Output Swing+ Output Swing– RL = 500Ω, VIN = ±10mV RL = 500Ω, VIN = ±10mV ● ● 3.55 IOUT Output Current VOUT = 3.5V or 1.5V, 10mV Overdrive ● 9 mA ISC Short-Circuit Current VOUT = 2.5V, V IN = ±1V ● 11 mA 1.45 V V SR Slew Rate AV = –1, (Note 7) ● 30 V/µs GBW Gain Bandwidth (Note 10) f = 200kHz ● 100 MHz Channel Separation VOUT = 1.5V to 3.5V, RL = 500Ω ● 81 dB IS Supply Current ● 5.95 mA MAX UNITS 900 1100 µV µV The ● denotes the specifications which apply over the temperature range of –40°C ≤ TA ≤ 85°C. VS = ±5V, VCM = 0V, unless otherwise noted. (Note 5) SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage (Note 6) LT1722 SOT-23 and LT1723 MS8 ● ● MIN Input VOS Drift (Note 9) ● TYP 10 µV/°C IOS Input Offset Current ● 400 nA IB Input Bias Current ● 400 nA Input Voltage Range + Input Voltage Range – ● –3.5 V V 3 3.5 CMRR Common Mode Rejection Ratio VCM = ±3.5V ● 75 dB PSRR Power Supply Rejection Ratio VS = ±2.0V to ±5.5V ● 75 dB AVOL Large-Signal Voltage Gain VOUT = ±3V, RL = 500Ω VOUT = ±3V, RL = 150Ω ● ● 8 5 V/mV V/mV VOUT Output Swing RL = 500Ω, VIN = ±10mV RL = 150Ω, VIN = ±10mV ● ● ±3.1 ±3.0 IOUT Output Current VOUT = ±3V, 10mV Overdrive ● 20 mA ISC Short-Circuit Current VOUT = 0V, VIN = ±1V ● 25 mA SR Slew Rate AV = –1, (Note 7) ● 25 V/µs GBW Gain Bandwidth f = 200kHz ● 90 MHz Channel Separation VOUT = ±3V, RL = 150Ω ● 80 dB IS Supply Current ● V V 5.95 mA 172234fa 5 LT1722/LT1723/LT1724 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the temperature range of – 40°C ≤ TA ≤ 85°C. VS = 5V, VCM = 2.5V, RL to 2.5V, unless otherwise noted. (Note 5) SYMBOL PARAMETER CONDITIONS MIN VOS Input Offset Voltage (Note 6) LT1722 SOT-23 and LT1723 MS8 ● ● Input VOS Drift (Note 9) ● TYP 3 MAX UNITS 1000 1200 µV µV 10 µV/°C IOS Input Offset Current ● 400 nA IB Input Bias Current ● 400 nA Input Voltage Range + Input Voltage Range – ● ● 3.5 1.5 V V CMRR Common Mode Rejection Ratio VCM = 1.5V to 3.5V ● 75 dB AVOL Large-Signal Voltage Gain VOUT = 1.5V to 3.5V, RL = 500Ω ● 2 V/mV VOUT Output Swing+ Output Swing– RL = 500Ω, VIN = ±10mV RL = 500Ω, VIN = ±10mV ● ● 3.5 Output Current VOUT = 3.5V or 1.5V, 30mV Overdrive ● 8 IOUT 1.5 V V mA ISC Short-Circuit Current VOUT = 2.5V, VIN = ±1V ● 10 mA SR Slew Rate AV = –1, (Note 7) ● 20 V/µs GBW Gain Bandwidth (Note 10) f = 200kHz ● 90 MHz Channel Separation VOUT = 1.5V to 3.5V, RL = 500Ω ● 80 IS Supply Current Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The inputs are protected by back-to-back diodes. If the differential input voltage exceeds 0.7V, the input current should be limited to less than 10mA. 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: The LT1722C/LT1722I, LT1723C/LT1723I, LT1724C/LT1724I are guaranteed functional over the operating temperature range of –40°C to 85°C. Note 5: The LT1722C/LT1723C/LT1724C are guaranteed to meet specified performance from 0°C to 70°C. The LT1722C/LT1723C/LT1724C are ● dB 6.45 mA designed, characterized and expected to meet specified performance from –40°C to 85°C but are not tested or QA sampled at these temperatures. The LT1722I/LT1723I/LT1724I are guaranteed to meet specified performance from –40°C to 85°C. Note 6: Input offset voltage is pulse tested and is exclusive of warm-up drift. Note 7: Slew rate is measured between ±2V on the output with ±3V input for ±5V supplies and ±1V on the output with ±1.5V input for single 5V supply. (For 5V supply, the voltage levels are 2.5V referred.) Note 8: Full power bandwidth is calculated from the slew rate: FPBW = SR/2πVP Note 9 : This parameter is not 100% tested. Note 10 : This parameter is guaranteed through correlation with slew rate. 172234fa 6 LT1722/LT1723/LT1724 U W TYPICAL PERFOR A CE CHARACTERISTICS V+ VS = 5V VS = ±5V 3.5 3.0 2.5 –0.5 –1.0 –1.5 –1.2 TA = 25°C ∆(VOS) < 500µV 2.0 1.5 1.0 V– 50 25 75 0 TEMPERATURE (°C) 100 1 3 2 5 4 SUPPLY VOLTAGE (±V) INPUT VOLTAGE NOISE (nV/√Hz) 10 IB– IB+ IB– IB+ in 10 1 en VS = ±5V 50 25 75 0 TEMPERATURE (°C) 100 125 1 0.01 0.1 Total Noise vs Unmatched Source Resistance RESISTOR NOISE 1 RS 0.1 0.01 + – OFFSET VOLTAGE DRIFT (µV) TOTAL NOISE VOLTAGE (nV/√Hz) 10 TOTAL NOISE 100 1723 G07 VS = ±5V, VO = ±3V 84.0 81.5 VS = ±2.5V, VO = ±1V 79.0 76.5 74.0 100 1000 LOAD RESISTANCE (Ω) 1723 G06 VOS Shift vs VCM and VS LT1722S8 TA = 25°C TYPICAL DATA 25 TA = 25°C TYPICAL PART VS = ±6.3V 200 VS = ±6V VS = ±5V 20 10000 300 15 VS = ±2.5V 10 100 V = ±5V S 0 –100 5 VS = ±4V VS = ±3V VS = ±2.5V –200 0 0.1 1 10 SOURCE RESISTANCE, RS (kΩ) 86.5 Warm-Up Drift vs Time 30 VS = ±5V TA = 25°C f = 10kHz TA = 25°C 1723 G05 1723 G04 100 0.1 100 1 10 FREQUENCY (kHz) 89.0 VOS SHIFT (µV) INPUT BIAS CURRENT (nA) VS = 5V 5 1723 G03 INPUT CURRENT NOISE (pA/√Hz) 40 –60 –50 –25 –5 –4 –3 –2 –1 0 1 2 3 4 INPUT COMMON MODE VOLTAGE (V) Open-Loop Gain vs Resistive Load 100 –40 –200 Input Noise Spectral Density 60 –20 TA = 125°C –100 1723 G02 Input Bias Current vs Temperature 0 TA = –45°C 0 7 6 1723 G01 20 100 –400 0 125 TA = 25°C –300 0.5 2.0 –50 –25 TA = 85°C 200 OPEN-LOOP GAIN (dB) 4.0 VS = ±5V 300 INPUT BIAS CURRENT (nA) 4.5 SUPPLY CURRENT (mA) 400 0.5 PER AMPLIFIER INPUT COMMON MODE RANGE (V) 5.0 Input Bias Current vs Common Mode Voltage Input Common Mode Range vs Supply Voltage Supply Current vs Temperature 0 10 20 30 40 50 60 70 80 90 100 TIME AFTER POWER-UP (SEC) 1723 G08 –300 –5 –4 –3 –2 –1 0 1 2 3 COMMON MODE VOLTAGE (V) 4 5 1723 G09 172234fa 7 LT1722/LT1723/LT1724 U W TYPICAL PERFOR A CE CHARACTERISTICS Undistorted Output Swing vs Frequency VOS vs Temperature TYPICAL PART OUTPUT VOLTAGE (VP-P) 0 VS = ±5V –100 –200 VS = ±2.5V –300 5.0 9 4.5 8 AV = 1, RF = 0Ω, RIN = 500Ω 7 6 5 4 3 2 –400 1 –500 –60 –40 –20 AV = –1, RF = 500Ω 0 0.1 0 20 40 60 80 100 120 TEMPERATURE (°C) 1 FREQUENCY (MHz) 82 81 80 VS = 5V, VO = ±1V RL = 500Ω 78 77 100 RL = 500Ω –1.0 –1.5 RL = 150Ω –2.0 2.0 RL = 150Ω 1.5 1.0 RL = 500Ω 2.0 125 2.5 3.0 3.5 4.0 4.5 5.0 SUPPLY VOLTAGE (±V) Gain and Phase vs Frequency ±5V 5V 5V 80 80 75 50 GAIN 40 40 30 30 20 20 0 65 60 50 10 70 70 TA = 25°C AV = –1 RF = RG = 500Ω –10 0.01 0.1 1 10 FREQUENCY (MHz) 10 PHASE (DEG) GAIN (dB) 60 90 OVERSHOOT (%) 70 100 95 80 SOURCE 75 VS = 5V 70 SINK 65 50 25 0 75 TEMPERATURE (°C) 45 AV = –1, RF = 500Ω, RS = 0Ω 40 35 25 20 AV = 100 AV = 10 1 AV = 1 0.1 0.01 30 –10 100 TA = 25°C VS = ±5V 10 AV = 1, RF = 500Ω, RS = 0Ω 50 125 Output Impedance vs Frequency VS = ±5V RL = 500Ω VIN = 2VP-P f = 1MHz 55 100 1723 G15 100 60 0 1723 G16 SINK 85 60 –50 –25 6.0 SOURCE VS = ±5V 90 Overshoot vs Capacitive Load PHASE ±5V 80 5.5 105 1723 G08 1723 G13 90 10 110 TA = 25°C VIN = 10mV V– 50 25 0 75 TEMPERATURE (°C) 1 FREQUENCY (MHz) Output Short-Circuit Current vs Temperature 0.5 76 –50 –25 AV = –1, RF = 500Ω 1.5 1723 G12 OUTPUT SHORT-CIRCIUT CURRENT (mA) RL = 500Ω OUTPUT VOLTAGE SWING (V) OPEN-LOOP GAIN (dB) –0.5 RL = 150Ω 79 2.0 0 0.1 10 V+ 83 2.5 Output Voltage Swing vs Supply Voltage 86 84 AV = 1, RF = 0Ω, RIN = 500Ω 3.0 1723 G11 Open-Loop Gain vs Temperature VS = ±5V, VO = ±3V 3.5 0.5 1723 G10 85 4.0 VS = 5V RL = 500Ω 2% MAX DISTORTION 1.0 VS = ±5V RL = 150Ω 2% MAX DISTORTION OUTPUT IMPEDANCE (Ω) OFFSET VOLTAGE (µV) 100 10 OUTPUT VOLTAGE (VP-P) 200 Undistorted Output Swing vs Frequency AV = 1, RF = 0Ω, RS = 500Ω 10 20 30 40 50 60 70 80 CAPACITIVE LOAD (pF) 90 100 1723 G17 0.001 0.01 0.1 1 10 FREQUENCY (MHz) 100 1723 G18 172234fa 8 LT1722/LT1723/LT1724 U W TYPICAL PERFOR A CE CHARACTERISTICS TA = 25°C AV = 1 RF = 0Ω NO RL ±5V 5V 8 7 7 6 CL = 100pF 5 4 3 CL = 50pF 2 1 7 6 5 RF = 500Ω 4 3 2 10 FREQUENCY (MHz) 1 100 10 FREQUENCY (MHz) 100 CROSSTALK (dB) –30 –40 –50 –60 –70 –80 –90 0.1 1 10 FREQUENCY (MHz) –PSRR 80 +PSRR 70 60 50 40 30 20 10 0.1 1 10 FREQUENCY (MHz) Slew Rate vs Temperature 80 90 75 VS = ±5V, SR + 70 PHASE MARGIN (DEG) SLEW RATE (V/µs) 70 VS = ±5V, SR – VS = ±2.5V, SR – 50 40 30 20 – 50 – 25 80 70 60 50 40 30 20 125 1723 G40 1 10 FREQUENCY (MHz) 100 1723 G24 220 TA = 25°C AV = –1 VIN = –20dBm RG = RF = 500Ω 215 RL = 500Ω 65 60 55 RL = 500Ω CL = 5pF CL = 25pF 50 40 100 0.1 Gain Bandwidth vs Supply Voltage RL = 150Ω RL = 150Ω RL = 150Ω CL = 55pF RL = 500Ω 2.5 3 3.5 4 5 4.5 SUPPLY VOLTAGE (±V) 5.5 210 6 1723 G41 RL = 150Ω CL = 25pF TA = 25°C AV = –1 VIN = –20dBm RG = RF = 500Ω 205 200 CL = 5pF 195 CL = 55pF CL = 25pF 190 185 35 75 50 25 TEMPERATURE (°C) 0 90 10 0.01 100 45 TA = 25°C AV = –1 RG = RF = 500Ω TA = 25°C VS = ±5V 100 Phase Margin vs Supply Voltage 100 60 110 1723 G23 1723 G22 VS = ±2.5V, SR + 100 Common Mode Rejection Ratio vs Frequency TA = 25°C VS = ±5V AV = 1 90 0 0.01 100 80 10 FREQUENCY (MHz) 1723 G21 Power Supply Rejection Ratio vs Frequency POWER SUPPLY REJECTION RATIO (dB) –20 1 1723 G20 Channel Separation vs Frequency TA = 25°C VO = 6VP-P RL = 150Ω –1 100 1723 G19 –10 CL = 0pF 0 COMMON MODE REJECTION RATIO (dB) 1 3 1 –1 –1 CL = 50pF 4 1 RF = 0Ω CL = 100pF 5 2 0 CL = 0pF 0 TA = 25°C AV = –1 RF = RG = 500Ω NO RL ±5V 5V 8 RF = 1k GAIN BANDWIDTH (MHz) GAIN (dB) 6 9 TA = 25°C AV = 1 NO RL NO CL ±5V 5V 8 GAIN (dB) 9 Gain vs Frequency, AV = –1 Gain vs Frequency, AV = 1 9 GAIN (dB) Gain vs Frequency, AV = 1 CL = 5pF RL = 500Ω 180 2.5 3 CL = 55pF 5 3.5 4.5 4 SUPPLY VOLTAGE (±V) 5.5 6 1723 G42 172234fa 9 LT1722/LT1723/LT1724 U W TYPICAL PERFOR A CE CHARACTERISTICS Harmonic Distortion vs Frequency AV = 1, VO = 0.2VP-P Slew Rate vs Supply Voltage SR SR – 70 SR+ 65 SR – 60 VIN = ±1.5V, VOUT_MES AT ±1V TA = 25°C AV = –1 RF = RG = RL = 500Ω 55 50 –40 VS = ±5V AV = 1 RF = 0Ω RIN = 0Ω VO = 0.2VP-P –50 –60 –70 RL = 150Ω, 3RD –80 RL = 150Ω, 2ND RL = 500Ω, 2ND –90 RL = 500Ω, 3RD –100 2 2.5 3 3.5 4 4.5 5 5.5 SUPPLY VOLTAGE (±V) 6 6.5 1 FREQUENCY (MHz) Harmonic Distortion vs Frequency AV = 2, VO = 0.2VP-P HARMONIC DISTORTION (dBc) HARMONIC DISTORTION (dBc) –50 –60 RL = 150Ω, 3RD –70 RL = 150Ω, 2ND –80 RL = 500Ω, 3RD –90 RL = 500Ω, 2ND –100 0.1 –40 –50 –60 RL = 150Ω, 3RD –70 RL = 150Ω, 2ND –80 RL = 500Ω, 3RD –90 RL = 500Ω, 2ND –50 –60 –70 RL = 150Ω, 2ND RL = 150Ω, 3RD –80 RL = 500Ω, 3RD RL = 500Ω, 2ND –90 0.1 10 1 FREQUENCY (MHz) –70 RL = 500Ω, 3RD RL = 500Ω, 2ND –90 10 1723 G30 Harmonic Distortion vs Frequency AV = 2, VO = 2VP-P –40 VS = 5V AV = 1 RF = 0Ω RIN = 500Ω VO = 2VP-P RL = 150Ω, 2ND 10 VS = ±5V AV = 1 RF = 0Ω RIN = 500Ω VO = 2VP-P 1723 G29 RL = 150Ω, 3RD –80 1 FREQUENCY (MHz) –100 1 FREQUENCY (MHz) HARMONIC DISTORTION (dBc) HARMONIC DISTORTION (dBc) –60 RL = 500Ω, 2ND –90 0.1 VS = 5V AV = 2 RF = 500Ω VO = 0.2VP-P Harmonic Distortion vs Frequency AV = 1, VO = 2VP-P –50 RL = 150Ω, 2ND Harmonic Distortion vs Frequency AV = 1, VO = 2VP-P 1723 G28 –40 –80 Harmonic Distortion vs Frequency AV = 2, VO = 0.2VP-P 0.1 10 RL = 150Ω, 3RD 1723 G27 –100 1 FREQUENCY (MHz) RL = 500Ω, 3RD –70 1723 G26 –40 VS = ±5V AV = 2 RF = 500Ω VO = 0.2VP-P –60 10 1723 G25 –40 –50 VS = 5V AV = 1 RF = 0Ω RIN = 0Ω VO = 0.2VP-P –100 0.1 HARMONIC DISTORTION (dBc) SLEW RATE (V/µs) 75 –40 + HARMONIC DISTORTION (dBc) VIN_P-P = VS, VOUT_MES AT 2/3 OF VIN_P-P HARMONIC DISTORTION (dBc) 80 Harmonic Distortion vs Frequency AV = 1, VO = 0.2VP-P –50 VS = ±5V AV = 2 RF = 500Ω VO = 2VP-P –60 RL = 150Ω, 2ND RL = 150Ω, 3RD –70 RL = 500Ω, 2ND –80 –90 RL = 500Ω, 3RD –100 –100 0.1 1 FREQUENCY (MHz) 10 1723 G31 0.1 1 FREQUENCY (MHz) 10 1723 G32 172234fa 10 LT1722/LT1723/LT1724 U W TYPICAL PERFOR A CE CHARACTERISTICS Harmonic Distortion vs Frequency AV = 2, VO = 2VP-P –50 –60 Settling Time vs Output Step 3.0 2.5 VS = 5V AV = 2 RF = 500Ω VO = 2VP-P 0.1% SETTLING 2.0 OUTPUT STEP (V) HARMONIC DISTORTION (dBc) –40 RL = 150Ω, 3RD RL = 150Ω, 2ND –70 –80 RL = 500Ω, 2ND 1.5 1.0 0.01% SETTLING VS = ±5V AV = –1 RF = 500Ω CF = 0pF 0.5 0 –0.5 –1.0 0.01% SETTLING –1.5 RL = 500Ω, 3RD –90 –2.0 0.1% SETTLING –2.5 –100 0.1 1 FREQUENCY (MHz) –3.0 10 70 60 80 90 100 110 120 130 140 SETTLING TIME (ns) 1723 G33 Large-Signal Transient, AV = 1 1723 G43 Small-Signal Transient, AV = 1 50mV/DIV 1V/DIV AV = 1 RS = 500Ω RF = 0Ω 50ns/DIV 50mV/DIV AV = 1 RS = 0Ω RF = 0Ω CL = 0pF 1723 G34 Large-Signal Transient, AV = –1 50ns/DIV AV = –1 RG = 500Ω RF = 500Ω 50ns/DIV 1723 G37 AV = 1 RS = 0Ω RF = 0Ω CL = 100pF 1723 G35 Small-Signal Transient, AV = –1 50mV/DIV 1V/DIV Small-Signal Transient, AV = 1 50ns/DIV 1723 G36 Small-Signal Transient, AV = –1 50mV/DIV AV = –1 RG = 500Ω RF = 500Ω CL = 0pF 50ns/DIV 1723 G38 AV = –1 RG = 500Ω RF = 500Ω CL = 100pF 50ns/DIV 1723 G39 172234fa 11 LT1722/LT1723/LT1724 U W U U APPLICATIO S I FOR ATIO The LT1722/LT1723/LT1724 may be inserted directly into many operational amplifier applications improving both DC and AC performance, as well as noise and distortion. VS+ +IN The parallel combination of the feedback resistor and gain setting resistor on the inverting input combine with the input capacitance to form a pole that can cause peaking or even oscillations. In parallel with the feedback resistor, a capacitor of value: CF > RG • CIN/RF should be used to cancel the input pole and optimize dynamic performance. For unity-gain applications where a feedback resistor is used, such as an I-to-V converter, CF should be five times greater than CIN; an optimum value for CF is 10pF. Input Considerations Each of the LT1722/LT1723/LT1724 inputs is protected with back-to-back diodes across the bases of the NPN input devices. If greater than 0.7V differential input voltages are anticipated, the input current must be limited to less than 10mA with an external series resistor. Each input also has two ESD clamp diodes—one to each supply. If an input is driven beyond the supply, limit the current with an external resistor to less than 10mA. The input stage protection circuit is shown in Figure 1. The input currents of the LT1722/LT1723/LT1724 are typically in the tens of nA range due to the bias current cancellation technique used at the input. As the input offset current can be greater than either input current, Q2 Q1 +IN Layout and Passive Components The LT1722/LT1723/LT1724 amplifiers are more tolerant of less than ideal layouts than other high speed amplifiers. For maximum performance (for example, fast settling time) use a ground plane, short lead lengths and RF quality bypass capacitors (0.01µF to 0.1µF). For high drive current applications, use low ESR supply bypass capacitors (1µF to 10µF tantalum). The output/input parasitic coupling should be minimized when high frequency performance is required. D1 D3 REXT D2 R D4 I1 VS – D5 –IN REXT –IN D6 I2 1723 F01 Figure 1. Input Stage Protection adding resistance to balance source resistance is not recommended. The value of the source resistor should be below 12k as it actually degrades DC accuracy and also increases noise. Total Input Noise The total input noise of the LT1722/LT1723/LT1724 is optimized for a source resistance between 0.8k and 12k. Within this range, the total input noise is dominated by the noise of the source resistance itself. When the source resistance is below 0.8k, voltage noise of the amplifier dominates. When the source resistance is above 12k, the input noise current is the dominant contributor. Capacitive Loading The LT1722/LT1723/LT1724 drive capacitive loads up to 100pF with unity gain. As the capacitive load increases, both the bandwidth and the phase margin decrease causing peaking in the frequency response and overshoot in the transient response. When there is a need to drive a larger capacitive load, a 25Ω series resistance assures stability with any value of load capacitor. A feedback capacitor also helps to reduce any peaking. Power Dissipation The LT1722/LT1723/LT1724 combine high speed and large output drive in a small package. Maximum junction temperature (TJ) is calculated from the ambient temperature (TA), power dissipation per amplifier (PD) and number of amplifiers (n) as follows: TJ = TA + (n • PD • θJA) 172234fa 12 LT1722/LT1723/LT1724 U W U U APPLICATIO S I FOR ATIO Power dissipation is composed of two parts. The first is due to the quiescent supply current and the second is due to on-chip dissipation caused by the load current. Worst-case instantaneous power dissipation for a given resistive load in one amplifier occurs at the maximum supply current and when the output voltage is at half of either supply voltage (or the maximum swing if less than half supply voltage). Therefore PD(MAX) in one amplifier is: PD(MAX) = (V+ – V–)(IS(MAX)) + (V+/2)2/RL or PD(MAX) = (V+ – V–)(IS(MAX)) + (V+ – VO(MAX))(VO(MAX)/RL) Example. Worst-case conditions are: both op amps in the LT1723IS8 are at TA = 85°C, VS = ±5V, RL = 150Ω, VOUT = 2.5V. Circuit Operation The LT1722/LT1723/LT1724 circuit topology is a voltage feedback amplifier. The operation of the circuit can be understood by referring to the Simplified Schematic. The first stage is a folded cascode formed by the transistors Q1 through Q4. A degeneration resistor, R, is used in the input stage. The current mirror Q5, Q6 is bootstrapped by Q7. The capacitor, C, assures the bandwidth and the slew rate performance. The output stage is formed by complementary emitter followers, Q8 through Q11. The diodes D1 and D2 protect against input reversed biasing. The remaining part of the circuit assures optimum voltage and current biases for all stages. Low noise, reduced current supply, high speed and DC accurate parameters are distinctive features of the LT1722/ LT1723/LT1724. PD(MAX) = 2 •[(10V)(5.95mA) + (2.5V)2/150Ω] = 203mW TJ(MAX) = 85°C + (203mW)(190°C/W) = 124°C which is less than the absolute maximum rating at 150°C. W W SI PLIFIED SCHE ATIC VS+ R1 R2 I5 Q3 Q4 VBIAS C D1 +IN Q1 Q10 Q2 –IN D2 R Q7 Q5 Q6 Q8 OUT Q9 Q11 I1 I2 I3 I4 1723 SS VS– 172234fa 13 LT1722/LT1723/LT1724 U PACKAGE DESCRIPTIO S5 Package 5-Lead Plastic SOT-23 (Reference LTC DWG # 05-08-1633) 0.62 MAX 0.95 REF 2.80 – 3.10 (NOTE 4) 1.22 REF 2.60 – 3.00 1.4 MIN 3.85 MAX 2.62 REF 1.50 – 1.75 (NOTE 4) PIN ONE RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.25 – 0.50 TYP 5 PLCS NOTE 3 0.95 BSC 0.90 – 1.30 0.20 BSC 0.00 – 0.15 0.90 – 1.45 DATUM ‘A’ 0.35 – 0.55 REF 0.09 – 0.20 (NOTE 3) NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6. PACKAGE EIAJ REFERENCE IS SC-74A (EIAJ) 1.90 BSC S5 SOT-23 0502 ATTENTION: ORIGINAL SOT23-5L PACKAGE. MOST SOT23-5L PRODUCTS CONVERTED TO THIN SOT23 PACKAGE, DRAWING # 05-08-1635 AFTER APPROXIMATELY APRIL 2001 SHIP DATE S8 Package 8-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) .189 – .197 (4.801 – 5.004) NOTE 3 .045 ±.005 .050 BSC 8 7 6 5 N N .245 MIN .160 ±.005 1 .030 ±.005 TYP .150 – .157 (3.810 – 3.988) NOTE 3 .228 – .244 (5.791 – 6.197) 2 3 N/2 N/2 RECOMMENDED SOLDER PAD LAYOUT .010 – .020 × 45° (0.254 – 0.508) .008 – .010 (0.203 – 0.254) 1 .053 – .069 (1.346 – 1.752) 0°– 8° TYP .016 – .050 (0.406 – 1.270) .014 – .019 (0.355 – 0.483) TYP INCHES (MILLIMETERS) 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) NOTE: 1. DIMENSIONS IN 2 3 4 .004 – .010 (0.101 – 0.254) .050 (1.270) BSC SO8 0502 172234fa 14 LT1722/LT1723/LT1724 U PACKAGE DESCRIPTIO MS8 Package 8-Lead Plastic MSOP (Reference LTC DWG # 05-08-1660) 0.889 ± 0.127 (.035 ± .005) 5.23 (.206) MIN 3.2 – 3.45 (.126 – .136) 0.42 ± 0.04 (.0165 ± .0015) TYP 3.00 ± 0.102 (.118 ± .004) (NOTE 3) 0.65 (.0256) BSC 8 0.52 (.206) REF 7 6 5 RECOMMENDED SOLDER PAD LAYOUT 0.254 (.010) 3.00 ± 0.102 (.118 ± .004) NOTE 4 4.90 ± 0.15 (1.93 ± .006) DETAIL “A” 0° – 6° TYP GAUGE PLANE 1 0.53 ± 0.015 (.021 ± .006) 2 3 4 1.10 (.043) MAX DETAIL “A” 0.86 (.034) REF 0.18 (.077) SEATING PLANE 0.22 – 0.38 (.009 – .015) TYP 0.13 ± 0.076 (.005 ± .003) 0.65 (.0256) BSC MSOP (MS8) 0802 NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX S Package 14-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) .337 – .344 (8.560 – 8.738) NOTE 3 .045 ±.005 .050 BSC 14 N 12 11 10 9 8 N .245 MIN .160 ±.005 .150 – .157 (3.810 – 3.988) NOTE 3 .228 – .244 (5.791 – 6.197) 1 .030 ±.005 TYP 13 2 3 N/2 N/2 RECOMMENDED SOLDER PAD LAYOUT 1 .010 – .020 × 45° (0.254 – 0.508) .008 – .010 (0.203 – 0.254) 2 3 4 5 6 7 .053 – .069 (1.346 – 1.752) .004 – .010 (0.101 – 0.254) 0° – 8° TYP .016 – .050 (0.406 – 1.270) NOTE: 1. DIMENSIONS IN .014 – .019 (0.355 – 0.483) TYP .050 (1.270) BSC INCHES (MILLIMETERS) 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) S14 0502 172234fa 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. 15 LT1722/LT1723/LT1724 U TYPICAL APPLICATIO 4- to 2-Wire Local Echo Cancellation Differential Receiver Amplifier – 10pF 2k 1/2 LT1739 + 1k 50Ω 1k – 1/2 LT1723 (n = 1) n:1 VD LINE DRIVER • VL 100Ω LINE + •R VR LINE RECEIVER L n2 + 1/2 LT1723 – + 50Ω 1k 1k 1/2 LT1739 – 2k 1723 TA03 10pF RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1677 Single, Low Noise Rail-to-Rail Amplifier 3V Operation, 2.5mA Supply Current, 4.5nV/√Hz Max en, 60µV Max VOS LT1800/LT1801/LT1802 Single/Dual/Quad, Low Power, 80MHz Rail-to-Rail Precision Amplifier 1.6mA Supply Current, 350µV VOS, 2.3V Operation LT1806/LT1807 Single/Dual, Low Noise 325MHz Rail-to-Rail Amplifiers 2.5V Operation, 550µVMAX VOS, 3.5nV/√Hz LT1809/LT1810 Single/Dual, Low Distortion 180MHz Rail-to-Rail Amplifiers 2.5V Operation, –90dBc at 5MHz Distortion LT1812/LT1813/LT1814 Single/Dual/Quad, 3mA, 750V/µs Amplifiers 5V Operation, 3.6mA Supply Current, 40mA Min Output Current LT6202/LT6203/LT6204 Single/Dual/Quad, 100MHz, Low Noise Rail-to-Rail Op Amp 2nV/√Hz, 2.5mA on Single 3V Supply 172234fa 16 Linear Technology Corporation LT/TP 1002 1K 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 2002