LT1809/LT1810 Single/Dual 180MHz, 350V/µs Rail-to-Rail Input and Output Low Distortion Op Amps U FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ DESCRIPTIO The LT®1809/LT1810 are single/dual low distortion railto-rail input and output op amps with a 350V/µs slew rate. These amplifiers have a –3dB bandwidth of 320MHz at unity-gain, a gain-bandwidth product of 180MHz (AV ≥ 10) and an 85mA output current to fit the needs of low voltage, high performance signal conditioning systems. –3dB Bandwidth: 320MHz, AV = 1 Gain-Bandwidth Product: 180MHz, AV ≥ 10 Slew Rate: 350V/µs Wide Supply Range: 2.5V to 12.6V Large Output Current: 85mA Low Distortion, 5MHz: – 90dBc Input Common Mode Range Includes Both Rails Output Swings Rail-to-Rail Input Offset Voltage, Rail-to-Rail: 2.5mV Max Common Mode Rejection: 89dB Typ Power Supply Rejection: 87dB Typ Open-Loop Gain: 100V/mV Typ Shutdown Pin: LT1809 Single in 8-Pin SO and 6-Pin SOT-23 Packages Dual in 8-Pin SO and MSOP Packages Operating Temperature Range: – 40°C to 85°C The LT1809/LT1810 have an input range that includes both supply rails and an output that swings within 20mV of either supply rail to maximize the signal dynamic range in low supply applications. The LT1809/LT1810 have very low distortion (–90dBc) up to 5MHz that allows them to be used in high performance data acquisition systems. The LT1809/LT1810 maintain their performance for supplies from 2.5V to 12.6V and are specified at 3V, 5V and ±5V supplies. The inputs can be driven beyond the supplies without damage or phase reversal of the output. U APPLICATIO S ■ ■ ■ ■ ■ Driving A/D Converters Low Voltage Signal Processing Active Filters Rail-to-Rail Buffer Amplifiers Video Line Driver The LT1809 is available in the 8-pin SO package with the standard op amp pinout and the 6-pin SOT-23 package. The LT1810 features the standard dual op amp pinout and is available in 8-pin SO and MSOP packages. These devices can be used as a plug-in replacement for many op amps to improve input/output range and performance. , LTC and LT are registered trademarks of Linear Technology Corporation. U Distortion vs Frequency TYPICAL APPLICATIO –40 –50 5V 5V VIN 1VP-P + R3 49.9Ω LT1809 +AIN C1 470pF – –5V –AIN LTC®1420 PGA GAIN = 1 REF = 2.048V 12 BITS 10Msps AV = +1 VIN = 2VP-P VS = ±5V –60 –70 RL = 100Ω, 2ND –80 –90 RL = 100Ω, 3RD RL = 1k, 3RD –100 R2 1k RL = 1k, 2ND 1809 TA01 –5V R1 1k • • • DISTORTION (dB) High Speed ADC Driver –110 0.3 1 10 30 FREQUENCY (MHz) 1809 TA02 1 LT1809/LT1810 W W W AXI U U ABSOLUTE RATI GS (Note 1) Total Supply Voltage (V + to V –) ........................... 12.6V Input Voltage (Note 2) .............................................. ±VS 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 Junction Temperature ........................................... 150°C Storage Temperature Range ................. – 65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C U U W PACKAGE/ORDER I FOR ATIO ORDER PART NUMBER TOP VIEW 6 V+ OUT 1 V– 2 5 SHDN +IN 3 4 –IN ORDER PART NUMBER TOP VIEW SHDN 1 LT1809CS6 LT1809IS6 –IN 2 – + +IN 3 V– 4 8 NC 7 V+ 6 OUT 5 NC LT1809CS8 LT1809IS8 S8 PART MARKING S6 PACKAGE 6-LEAD PLASTIC SOT-23 S6 PART MARKING TJMAX = 150°C, θJA = 145°C/W (Note 9) LTKY LTUF TJMAX = 150°C, θJA = 100°C/W (Note 9) 1809 1809I ORDER PART NUMBER TOP VIEW ORDER PART NUMBER TOP VIEW OUT A –IN A +IN A V– 1 2 3 4 8 7 6 5 V+ OUT B –IN B +IN B MS8 PACKAGE 8-LEAD PLASTIC MSOP TJMAX = 150°C, θJA = 130°C/W (Note 9) S8 PACKAGE 8-LEAD PLASTIC SO 8 V+ OUT A 1 LT1810CMS8 LT1810IMS8 –IN A 2 V– 4 MS8 PART MARKING LTRF LTTQ LT1810CS8 LT1810IS8 7 OUT B A +IN A 3 6 –IN B B 5 +IN B S8 PART MARKING S8 PACKAGE 8-LEAD PLASTIC SO 1810 1810I TJMAX = 150°C, θJA = 100°C/W (Note 9) Consult factory for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS TA = 25°C. VS = 5V, 0V; VS = 3V, 0V; VSHDN = open; VCM = VOUT = half supply, unless otherwise noted. SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage ∆VOS Input Offset Shift VCM = V + LT1809 SO-8 VCM = V – LT1809 SO-8 VCM = V + VCM = V – VCM = V – to V + LT1809 SO-8 VCM = V – to V + MIN Input Offset Voltage Match (Channel-to-Channel) (Note 10) IB ∆IB Input Bias Current Input Bias Current Shift Input Bias Current Match (Channel-to-Channel) (Note 10) 2 VCM = V + VCM = V – + 0.2V VCM = V – + 0.2V to V + VCM = V + VCM = V – + 0.2V – 27.5 TYP MAX UNITS 0.6 0.6 0.6 0.6 2.5 2.5 3.0 3.0 mV mV mV mV 0.3 0.3 2.0 2.5 mV mV 0.7 6 mV 1.8 –13 8 µA µA 14.8 35.5 µA 0.1 0.2 4 8 µA µA LT1809/LT1810 ELECTRICAL CHARACTERISTICS TA = 25°C. VS = 5V, 0V; VS = 3V, 0V; VSHDN = open; VCM = VOUT = half supply, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IOS Input Offset Current VCM VCM = V – + 0.2V 0.05 0.2 1.2 4 µA µA ∆IOS Input Offset Current Shift VCM = V – + 0.2V to V + 0.25 5.2 µA en Input Noise Voltage Density f = 10kHz in Input Noise Current Density f = 10kHz CIN Input Capacitance AVOL Large-Signal Voltage Gain VS = 5V, VO = 0.5V to 4.5V, RL = 1k to VS/2 VS = 5V, VO = 1V to 4V, RL = 100Ω to VS/2 VS = 3V, VO = 0.5V to 2.5V, RL = 1k to VS/2 CMRR Common Mode Rejection Ratio CMRR Match (Channel-to-Channel) (Note 10) = V+ nV/√Hz 5 pA/√Hz 2 pF 25 4 15 80 10 42 V/mV V/mV V/mV VS = 5V, VCM = V – to V + VS = 3V, VCM = V – to V + 66 61 82 78 dB dB VS = 5V, VCM = V – to V + VS = 3V, VCM = V – to V + 60 55 82 78 dB dB V– Input Common Mode Range PSRR 16 V+ V Power Supply Rejection Ratio VS = 2.5V to 10V, VCM = 0V 71 87 dB PSRR Match (Channel-to-Channel) (Note 10) VS = 2.5V to 10V, VCM = 0V 65 87 dB Minimum Supply Voltage (Note 6) 2.3 2.5 V VOL Output Voltage Swing LOW (Note 7) No Load ISINK = 5mA ISINK = 25mA 12 50 180 50 120 375 mV mV mV VOH Output Voltage Swing HIGH (Note 7) No Load ISOURCE = 5mA ISOURCE = 25mA 20 80 330 80 180 650 mV mV mV ISC Short-Circuit Current VS = 5V VS = 3V IS Supply Current per Amplifier ISHDN ±45 ±35 ±85 ±70 mA mA 12.5 17 mA Supply Current, Shutdown VS = 5V, VSHDN = 0.3V VS = 3V, VSHDN = 0.3V 0.55 0.31 1.25 0.90 mA mA SHDN Pin Current VS = 5V, VSHDN = 0.3V VS = 3V, VSHDN = 0.3V 420 220 750 500 µA µA Output Leakage Current, Shutdown VSHDN = 0.3V 0.1 75 µA 0.3 V VL SHDN Pin Input Voltage Low VH SHDN Pin Input Voltage High tON Turn-On Time VSHDN = 0.3V to 4.5V, RL = 100 tOFF Turn-Off Time VSHDN = 4.5V to 0.3V, RL = 100 50 ns GBW Gain-Bandwidth Product Frequency = 2MHz 160 MHz SR Slew Rate VS = 5V, AV = –1, RL = 1k, VO = 4VP-P 300 V/µs FPBW Full Power Bandwidth VS = 5V, VOUT = 4VP-P 23.5 MHz THD Total Harmonic Distortion VS = 5V, AV = 1, RL = 1k, VO = 2VP-P, fC = 5MHz – 86 dB tS Settling Time 0.1%, VS = 5V, VSTEP = 2V, AV = – 1, RL = 500Ω 27 ns ∆G Differential Gain (NTSC) VS = 5V, AV = 2, RL = 150Ω 0.015 % ∆θ Differential Phase (NTSC) VS = 5V, AV = 2, RL = 150Ω 0.05 Deg VS – 0.5 V 80 ns 3 LT1809/LT1810 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the 0°C ≤ TA ≤ 70°C temperature range. VS = 5V, 0V; VS = 3V, 0V; VSHDN = open; VCM = VOUT = half supply, unless otherwise noted. SYMBOL PARAMETER CONDITIONS TYP MAX VOS Input Offset Voltage VCM = V + LT1809 SO-8 VCM = V – LT1809 SO-8 VCM = V + VCM = V – ● ● ● ● 1 1 1 1 3.0 3.0 3.5 3.5 mV mV mV mV VOS TC Input Offset Voltage Drift (Note 8) VCM = V + VCM = V – ● ● 9 9 25 25 µV/°C µV/°C ∆VOS Input Offset Voltage Shift VCM = V – to V + LT1809 SO-8 VCM = V – to V + ● ● 0.5 0.5 2.5 3.0 mV mV Input Offset Voltage Match (Channel-to-Channel) (Note 10) VCM = V –, VCM = V + ● 1.2 6.5 mV Input Bias Current VCM = V + – 0.2V VCM = V – + 0.4V ● ● 2 –14 10 µA µA Input Bias Current Shift VCM = V – + 0.4V to V + – 0.2V ● 16 40 µA Input Bias Current Match (Channel-to-Channel) (Note 10) VCM = V + – 0.2V VCM = V – + 0.4V ● ● 0.1 0.5 5 10 µA µA IOS Input Offset Current VCM = V + – 0.2V VCM = V – + 0.4V ● ● 0.05 0.40 1.5 4.5 µA µA ∆IOS Input Offset Current Shift VCM = V – + 0.4V to V + – 0.2V ● 0.45 6 µA AVOL Large-Signal Voltage Gain VS = 5V, VO = 0.5V to 4.5V, RL = 1k to VS/2 VS = 5V, VO = 1V to 4V, RL = 100Ω to VS/2 VS = 3V, VO = 0.5V to 2.5V, RL = 1k to VS/2 ● ● ● 20 3.5 12 75 8.5 40 V/mV V/mV V/mV CMRR Common Mode Rejection Ratio VS = 5V, VCM = V – to V + VS = 3V, VCM = V – to V + ● ● 64 60 80 75 dB dB CMRR Match (Channel-to-Channel) (Note 10) VS = 5V, VCM = V –, VCM = V + VS = 3V, VCM = V –, VCM = V + ● ● 58 54 80 75 dB dB ● V– IB ∆IB Input Common Mode Range PSRR MIN – 30 Power Supply Rejection Ratio VS = 2.5V to 10V, VCM = 0V ● 70 PSRR Match (Channel-to-Channel) (Note 10) VS = 2.5V to 10V, VCM = 0V ● 64 Minimum Supply Voltage (Note 6) V+ 83 UNITS V dB 83 dB ● 2.3 2.5 V VOL Output Voltage Swing LOW (Note 7) No Load ISINK = 5mA ISINK = 25mA ● ● ● 12 55 200 60 140 400 mV mV mV VOH Output Voltage Swing HIGH (Note 7) No Load ISOURCE = 5mA ISOURCE = 25mA ● ● ● 50 110 370 120 220 700 mV mV mV ISC Short-Circuit Current VS = 5V VS = 3V ● ● IS Supply Current per Amplifier ISHDN ±40 ±30 mA mA ● 15 20 mA Supply Current, Shutdown VS = 5V, VSHDN = 0.3V VS = 3V, VSHDN = 0.3V ● ● 0.58 0.35 1.4 1.1 mA mA SHDN Pin Current VS = 5V, VSHDN = 0.3V VS = 3V, VSHDN = 0.3V ● ● 420 220 850 550 µA µA Output Leakage Current, Shutdown VSHDN = 0.3V ● 2 VL SHDN Pin Input Voltage Low ● VH SHDN Pin Input Voltage High ● VS – 0.5 4 ±75 ±65 µA 0.3 V V LT1809/LT1810 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the 0°C ≤ TA ≤ 70°C temperature range. VS = 5V, 0V; VS = 3V, 0V; VSHDN = open; VCM = VOUT = half supply, unless otherwise noted. SYMBOL PARAMETER CONDITIONS tON VSHDN = 0.3V to 4.5V, RL = 100 ● Turn-On Time MIN TYP MAX 80 UNITS ns tOFF Turn-Off Time VSHDN = 4.5V to 0.3V, RL = 100 ● 50 ns GBW Gain-Bandwidth Product Frequency = 2MHz ● 145 MHz SR Slew Rate VS = 5V, AV = –1, RL = 1k, VO = 4VP-P ● 250 V/µs FPBW Full Power Bandwidth VS = 5V, VOUT = 4VP-P ● 20 MHz The ● denotes the specifications which apply over the – 40°C ≤ TA ≤ 85°C temperature range. VS = 5V, 0V; VS = 3V, 0V; VSHDN = open; VCM = VOUT = half supply, unless otherwise noted. (Note 5) SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage VOS TC Input Offset Voltage Drift (Note 8) ∆VOS Input Offset Voltage Shift VCM = V + LT1809 SO-8 VCM = V – LT1809 SO-8 VCM = V + VCM = V – VCM = V + VCM = V – VCM = V – to V+ LT1809 SO-8 VCM = V – VCM = V +, VCM = V – VCM = V + – 0.2V VCM = V – + 0.4V ● ● Input Bias Current Shift VCM = V – + 0.4V to V + – 0.2V Input Bias Current Match (Channel-to-Channel) (Note 10) VCM = V + VCM = V – VCM = V + VCM = V – VCM = V – Input Offset Voltage Match (Channel-to-Channel) (Note 10) IB ∆IB Input Bias Current MIN TYP MAX UNITS ● ● ● ● 1 1 1 1 3.5 3.5 4.0 4.0 mV mV mV mV ● ● 9 9 25 25 µV/°C µV/°C ● ● 0.5 0.5 3.0 3.5 mV mV ● 1.2 7 mV 2 –17 12 µA µA ● 19 47 µA – 0.2V + 0.4V ● ● 0.2 0.6 6 12 µA µA – 0.2V + 0.4V ● ● 0.08 0.5 2 6 µA µA + 0.4V to V + – 0.2V ● 0.58 7.5 – 35 IOS Input Offset Current ∆IOS Input Offset Current Shift AVOL Large-Signal Voltage Gain VS = 5V, VO = 0.5V to 4.5V, RL = 1k to VS/2 VS = 5V, VO = 1V to 4V, RL = 100Ω to VS/2 VS = 3V, VO = 0.5V to 2.5V, RL = 1k to VS/2 ● ● ● 17 2.5 10 60 7 35 V/mV V/mV V/mV CMRR Common Mode Rejection Ratio VS = 5V, VCM = V – to V + VS = 3V, VCM = V – to V + ● ● 63 58 80 75 dB dB CMRR Match (Channel-to-Channel) (Note 10) VS = 5V, VCM = V – to V + VS = 3V, VCM = V – to V + ● ● 57 52 78 72 dB dB ● V– Input Common Mode Range PSRR Power Supply Rejection Ratio VS = 2.5V to 10V, VCM = 0V ● 69 PSRR Match (Channel-to-Channel) (Note 10) VS = 2.5V to 10V, VCM = 0V ● 63 Minimum Supply Voltage (Note 6) V+ 83 µA V dB 83 dB ● 2.3 2.5 V VOL Output Voltage Swing LOW (Note 7) No Load ISINK = 5mA ISINK = 25mA ● ● ● 18 60 210 70 150 450 mV mV mV VOH Output Voltage Swing HIGH (Note 7) No Load ISOURCE = 5mA ISOURCE = 25mA ● ● ● 55 120 375 130 240 750 mV mV mV ISC Short-Circuit Current VS = 5V VS = 3V ● ● IS Supply Current per Amplifier Supply Current, Shutdown VS = 5V, VSHDN = 0.3V VS = 3V, VSHDN = 0.3V ±30 ±25 ±70 ±60 mA mA ● 15 21 mA ● ● 0.58 0.35 1.5 1.2 mA mA 5 LT1809/LT1810 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the – 40°C ≤ TA ≤ 85°C temperature range. VS = 5V, 0V; VS = 3V, 0V; VSHDN = open; VCM = VOUT = half supply, unless otherwise noted. (Note 5) SYMBOL PARAMETER CONDITIONS TYP MAX UNITS ISHDN SHDN Pin Current VS = 5V, VSHDN = 0.3V VS = 3V, VSHDN = 0.3V ● ● MIN 420 220 900 600 µA µA Output Leakage Current, Shutdown VSHDN = 0.3V ● 3 µA VL SHDN Pin Input Voltage Low ● 0.3 V VH SHDN Pin Input Voltage High ● VS – 0.5 tON Turn-On Time VSHDN = 0.3V to 4.5V, RL = 100 ● 80 ns tOFF Turn-Off Time VSHDN = 4.5V to 0.3V, RL = 100 ● 50 ns GBW Gain-Bandwidth Product Frequency = 2MHz ● 140 MHz SR Slew Rate VS = 5V, AV = -1, RL = 1k, VO = 4VP-P ● 180 V/µs FPBW Full Power Bandwidth VS = 5V, VOUT = 4VP-P ● 14 MHz V TA = 25°C. VS = ±5V, VSHDN = open, VCM = 0V, VOUT = 0V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage ∆VOS Input Offset Voltage Shift VCM = V + LT1809 SO-8 VCM = V – LT1809 SO-8 VCM = V + VCM = V – VCM = V – to V + LT1809 SO-8 VCM = V – to V + VCM = V +, VCM = V – Input Offset Voltage Match (Channel-to-Channel) (Note 10) IB ∆IB Input Bias Current VCM = V + VCM = V – + 0.2V MIN – 30 TYP MAX UNITS 0.8 0.8 0.8 0.8 3.0 3.0 3.5 3.5 mV mV mV mV 0.35 0.35 2.5 3.0 mV mV 1 6 mV 2 –12.5 10 µA µA Input Bias Current Shift VCM = V – + 0.2V to V + 14.5 40 µA Input Bias Current Match (Channel-to-Channel) (Note 10) VCM = V+ VCM = V – + 0.2V VCM = V+ VCM = V – + 0.2V VCM = V – + 0.2V to V + 0.1 0.4 5 10 µA µA 0.05 0.40 2 5 µA µA 0.45 7 µA IOS Input Offset Current ∆IOS Input Offset Current Shift en Input Noise Voltage Density f = 10kHz 16 nV/√Hz in Input Noise Current Density f = 10kHz 5 pA/√Hz CIN Input Capacitance f = 100kHz 2 pF AVOL Large-Signal Voltage Gain VO = – 4V to 4V, RL = 1k VO = – 2.5V to 2.5V, RL = 100Ω 30 4.5 100 12 V/mV V/mV CMRR Common Mode Rejection Ratio VCM = V – to V + 70 89 dB CMRR Match (Channel-to-Channel) (Note 10) VCM = V – to V + 64 89 V– Input Common Mode Range dB V+ V Power Supply Rejection Ratio V + = 2.5V to 10V, V – = 0V 71 87 dB PSRR Match (Channel-to-Channel) (Note 10) V + = 2.5V to 10V, V – = 0V 65 90 dB VOL Output Voltage Swing LOW (Note 7) No Load ISINK = 5mA ISINK = 25mA 12 50 180 60 140 425 mV mV mV VOH Output Voltage Swing HIGH (Note 7) No Load ISOURCE = 5mA ISOURCE = 25mA 35 90 310 100 200 700 mV mV mV PSRR 6 LT1809/LT1810 ELECTRICAL CHARACTERISTICS TA = 25°C. VS = ±5V, VSHDN = open, VCM = 0V, VOUT = 0, unless otherwise noted. SYMBOL PARAMETER ISC Short-Circuit Current IS Supply Current per Amplifier ISHDN VL CONDITIONS MIN TYP ±55 ±85 MAX UNITS mA 15 20 mA Supply Current, Shutdown VSHDN = 0.3V 0.6 1.3 mA SHDN Pin Current VSHDN = 0.3V 420 750 µA Output Leakage Current, Shutdown VSHDN = 0.3V 0.1 75 µA 0.3 V SHDN Pin Input Voltage Low V+ VH SHDN Pin Input Voltage High – 0.5 V tON Turn-On Time VSHDN = 0.3V to 4.5V, RL = 100 80 ns tOFF Turn-Off Time VSHDN = 4.5V to 0.3V, RL = 100 50 ns GBW Gain-Bandwidth Product Frequency = 2MHz 110 180 MHz SR Slew Rate AV = –1, RL = 1k, VO = ±4V, Measured at VO = ±3V 175 350 V/µs FPBW Full Power Bandwidth VOUT = 8VP-P 14 MHz THD Total Harmonic Distortion AV = 1, RL = 1k, VO = 2VP-P, fC = 5MHz – 90 dB tS Settling Time 0.1%, VSTEP = 8V, AV = – 1, RL = 500Ω 34 ns ∆G Differential Gain (NTSC) AV = 2, RL = 150Ω 0.01 % ∆θ Differential Phase (NTSC) AV = 2, RL = 150Ω 0.01 Deg The ● denotes the specifications which apply over the 0°C ≤ TA ≤ 70°C temperature range. VS = ±5V, VSHDN = open, VCM = 0V, VOUT = 0V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS TYP MAX UNITS VOS Input Offset Voltage VCM = V + LT1809 SO-8 VCM = V – LT1809 SO-8 VCM = V + VCM = V – ● ● ● ● 1 1 1 1 3.25 3.25 3.75 3.75 mV mV mV mV VOS TC Input Offset Voltage Drift (Note 8) VCM = V + VCM = V – ● ● 10 10 25 25 ∆VOS Input Offset Voltage Shift VCM = V – to V + LT1809 SO-8 VCM = V – to V + ● ● 0.5 0.5 2.75 3.25 mV mV Input Offset Voltage Match (Channel-to-Channel) (Note 10) VCM = V – to V + ● 1.2 6.5 mV Input Bias Current VCM = V + – 0.2V VCM = V – + 0.4V ● ● 2.5 –15 12.5 µA µA VCM = V – + 0.4V to V + – 0.2V IB ∆IB MIN – 37.5 µV/°C µV/°C ● 17.5 50 µA Input Bias Current Match (Channel-to-Channel) (Note 10) = V + – 0.2V VCM VCM = V – + 0.4V ● ● 0.1 0.5 6 12 µA µA IOS Input Offset Current VCM = V + – 0.2V VCM = V – + 0.4V ● ● 0.06 0.5 2.25 6 µA µA ∆IOS Input Offset Current Shift VCM = V – + 0.4V to V + – 0.2V ● 0.56 8.25 µA AVOL Large-Signal Voltage Gain VO = – 4V to 4V, RL = 1k VO = – 2.5V to 2.5V, RL = 100Ω ● ● 27 3.5 80 10 V/mV V/mV CMRR Common Mode Rejection Ratio VCM = V – to V + ● 69 86 dB CMRR Match (Channel-to-Channel) (Note 10) VCM = V – to V + ● 63 86 ● V– Input Bias Current Shift Input Common Mode Range dB V+ V 7 LT1809/LT1810 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the 0°C ≤ TA ≤ 70°C temperature range. VS = ±5V, VSHDN = open, VCM = 0V, VOUT = 0V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS PSRR MIN TYP MAX UNITS Power Supply Rejection Ratio V + = 2.5V to 10V, V – = 0V ● 70 83 dB PSRR Match (Channel-to-Channel) (Note 10) V + = 2.5V to 10V, V – = 0V ● 64 83 dB VOL Output Voltage Swing LOW (Note 7) No Load ISINK = 5mA ISINK = 25mA ● ● ● 20 50 210 80 160 475 mV mV mV VOH Output Voltage Swing HIGH (Note 7) No Load ISOURCE = 5mA ISOURCE = 25mA ● ● ● 60 120 370 140 240 750 mV mV mV ISC Short-Circuit Current ● IS Supply Current per Amplifier ● ISHDN ±45 ±75 17.5 mA 25 mA Supply Current, Shutdown VSHDN= 0.3V ● 0.6 1.5 mA SHDN Pin Current VSHDN = 0.3V ● 420 850 µA Output Leakage Current, Shutdown VSHDN = 0.3V ● 3 VL SHDN Pin Input Voltage Low ● VH SHDN Pin Input Voltage High ● tON Turn-On Time VSHDN = 0.3V to 4.5V, RL = 100 ● µA 0.3 V+ – 0.5 V V 80 ns tOFF Turn-Off Time VSHDN = 4.5V to 0.3V, RL = 100 ● 50 ns GBW Gain-Bandwidth Product Frequency = 2MHz ● 85 170 MHz SR Slew Rate AV = –1, RL = 1k, VO = ±4V, Measured at VO = ±3V ● 140 300 V/µs FPBW Full Power Bandwidth VOUT = 8VP-P ● 12 MHz The ● denotes the specifications which apply over the – 40°C ≤ TA ≤ 85°C temperature range. VS = ±5V, VSHDN = open, VCM = 0V, VOUT = 0V, unless otherwise noted. (Note 5) SYMBOL PARAMETER CONDITIONS = V+ MIN TYP MAX UNITS mV mV mV mV VOS Input Offset Voltage VCM LT1809 SO-8 VCM = V – LT1809 SO-8 VCM = V + VCM = V – ● ● ● ● 1 1 1 1 3.75 3.75 4.25 4.25 VOS TC Input Offset Voltage Drift (Note 8) VCM = V + VCM = V – ● ● 10 10 25 25 ∆VOS Input Offset Voltage Shift VCM = V – to V + LT1809 SO-8 VCM = V – to V + ● ● 0.5 0.5 3.00 3.75 mV mV Input Offset Voltage Match (Channel-to-Channel) (Note 10) VCM = V – to V + ● 1.2 7.5 mV Input Bias Current VCM = V + – 0.2V VCM = V – + 0.4V ● ● 2.8 –17 14 µA µA Input Bias Current Shift VCM = V – + 0.4V to V + – 0.2V ● 19.8 59 µA Input Bias Current Match (Channel-to-Channel) (Note 10) VCM = V + – 0.2V VCM = V – + 0.4V ● ● 0.1 0.6 7 14 µA µA IOS Input Offset Current VCM = V + – 0.2V VCM = V – + 0.4V ● ● 0.08 0.6 2.5 8 µA µA ∆IOS Input Offset Current Shift VCM = V – + 0.4V to V + – 0.2V ● 0.68 10.5 µA AVOL Large-Signal Voltage Gain VO = – 4V to 4V, RL = 1k VO = – 2.5V to 2.5V, RL = 100Ω ● ● IB ∆IB 8 – 45 22 3 70 10 µV/°C µV/°C V/mV V/mV LT1809/LT1810 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the – 40°C ≤ TA ≤ 85°C temperature range. VS = ±5V, VSHDN = open, VCM = 0V, VOUT = 0V, unless otherwise noted. (Note 5) SYMBOL PARAMETER MIN TYP 68 86 ● 62 86 ● V– Power Supply Rejection Ratio V + = 2.5V to 10V, V – = 0V ● 69 83 dB PSRR Match (Channel-to-Channel) (Note 10) V + = 2.5V to 10V, V – = 0V ● 63 83 dB VOL Output Voltage Swing LOW (Note 7) No Load ISINK = 5mA ISINK = 25mA ● ● ● 23 60 220 100 170 525 mV mV mV VOH Output Voltage Swing HIGH (Note 7) No Load ISOURCE = 5mA ISOURCE = 25mA ● ● ● 75 130 375 160 260 775 mV mV mV ISC Short-Circuit Current ● IS Supply Current per Amplifier ● 19 CMRR Common Mode Rejection Ratio CMRR Match (Channel-to-Channel) (Note 10) CONDITIONS VCM = V– to V + ● VCM = V– to V + Input Common Mode Range PSRR ISHDN ±30 MAX UNITS dB dB V+ ±75 V mA 25 mA Supply Current, Shutdown VSHDN = 0.3V ● 0.65 1.6 mA SHDN Pin Current VSHDN = 0.3V ● 420 900 µA Output Leakage Current, Shutdown VSHDN = 0.3V ● 4 VL SHDN Pin Input Voltage Low ● VH SHDN Pin Input Voltage High ● tON Turn-On Time VSHDN = 0.3V to 4.5V, RL = 100 ● µA 0.3 V+ – 0.5 V V 80 ns tOFF Turn-Off Time VSHDN = 4.5V to 0.3V, RL = 100 ● 50 ns GBW Gain-Bandwidth Product Frequency = 2MHz ● 80 160 MHz SR Slew Rate AV = – 1, RL = 1k, VO = ±4V, Measured at VO = ±3V ● 110 220 V/µs FPBW Full Power Bandwidth VOUT = 8VP-P ● 8.5 MHz 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 1.4V, 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 LT1809C/LT1809I and LT1810C/LT1810I are guaranteed functional over the operating temperature range of – 40°C and 85°C. Note 5: The LT1809C/LT1810C are guaranteed to meet specified performance from 0°C to 70°C. The LT1809C/LT1810C are 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 LT1809I/LT1810I are guaranteed to meet specified performance from – 40°C to 85°C. Note 6: Minimum supply voltage is guaranteed by power supply rejection ratio test. Note 7: Output voltage swings are measured between the output and power supply rails. Note 8: This parameter is not 100% tested. Note 9: Thermal resistance varies depending upon the amount of PC board metal attached to the V – pin of the device. θJA is specified for a certain amount of 2oz of copper metal trace connecting to the V – pin as described in the thermal resistance tables in the Applications Information section. Note 10: Matching parameters are the difference between the two amplifiers of the LT1810. 9 LT1809/LT1810 U W TYPICAL PERFOR A CE CHARACTERISTICS VOS Distribution, VCM = 0V (PNP Stage) VOS Distribution, VCM = 5V (NPN Stage) 50 25 VS = 5V, 0V VS = 5V, 0V VS = 5V, 0V 30 20 10 20 PERCENT OF UNITS (%) 40 PERCENT OF UNITS (%) PERCENT OF UNITS (%) 40 0 30 20 10 2 –1 0 1 –2 INPUT OFFSET VOLTAGE (mV) –3 0 3 –3 2 –1 0 1 –2 INPUT OFFSET VOLTAGE (mV) 0 3 2.0 1.5 TA = –55°C 10 TA = 125°C 1.0 0.5 TA = 25°C 0 –0.5 TA = –55°C 5 –1.0 –1.5 0 1 2 3 4 5 6 7 8 TOTAL SUPPLY VOLTAGE (V) 9 10 1 0 2 3 4 INPUT COMMON MODE VOLTAGE (V) 1809 G04 10 VS = 5V, 0V 1 VCM = 5V –1 –3 –5 –7 VCM = 0V –9 –11 –13 –15 –50 –35 –20 –5 10 25 40 55 TEMPERATURE (°C) 70 85 1809 G07 10 TA = –55°C –5 –10 TA = –55°C –15 TA = 25°C TA = 125°C –20 –30 –1 5 0 4 5 1 3 2 COMMON MODE VOLTAGE (V) Output Saturation Voltage vs Load Current (Output High) 10 VS = 5V, 0V 1 0.1 TA = 125°C 0.01 0.001 0.01 TA = –55°C TA = 25°C 0.1 1 10 LOAD CURRENT (mA) 6 1809 G06 Output Saturation Voltage vs Load Current (Output Low) OUTPUT LOW SATURATION VOLTAGE (V) INPUT BIAS CURRENT (µA) 3 TA = 125°C 1809 G05 Input Bias Current vs Temperature 5 TA = 25°C 0 –25 OUTPUT HIGH SATURATION VOLTAGE (V) 0 VS = 5V, 0V 5 INPUT BIAS CURRENT (µA) OFFSET VOLTAGE (mV) TA = 25°C 1 Input Bias Current vs Common Mode Voltage VS = 5V, 0V TYPICAL PART 20 TA = 125°C –1 –0.75 –0.5 –0.25 0 0.25 0.5 0.75 INPUT OFFSET VOLTAGE (mV) 1809 G03 Offset Voltage vs Input Common Mode 25 10 10 1809 G02 Supply Current vs Supply Voltage 15 15 5 1809 G01 SUPPLY CURRENT (mA) ∆VOS Shift for VCM = 0V to 5V 50 100 1809 G08 VS = 5V, 0V 1 0.1 TA = 125°C TA = 25°C 0.01 TA = –55°C 0.001 0.01 0.1 1 10 LOAD CURRENT (mA) 100 1809 G09 LT1809/LT1810 U W TYPICAL PERFOR A CE CHARACTERISTICS Minimum Supply Voltage 0.4 TA = –55°C 0 TA = 125°C –0.2 –0.4 TA = 25°C –0.6 –0.8 –1.0 1.5 2.0 5.0 2.5 3.0 3.5 4.0 4.5 TOTAL SUPPLY VOLTAGE (V) TA = 25°C TA = –55°C 100 80 TA = 125°C 60 40 “SINKING” 20 0 –20 “SOURCING” –40 TA = –55°C –60 TA = 125°C TA = 25°C –100 1.5 4.0 4.5 2.0 2.5 3.0 3.5 POWER SUPPLY VOLTAGE (±V) VS = 5V, 0V TA = 25°C –250 –300 RL = 1k 0 –0.5 –1.0 –400 –2.0 RL = 100Ω 3 4 2 SHDN PIN VOLTAGE (V) 0.5 1.5 2.0 1.0 OUTPUT VOLTAGE (V) RL = 1k –0.5 –1.0 –1.5 2.5 RL = 100Ω RL = 100Ω 0 1 3 2 OUTPUT VOLTAGE (V) 5 TA = 125°C 0 TA = –55°C –5 –10 5 Warm-Up Drift vs Time (LT1809S8) VS = ±5V TA = 25°C 4 1809 G15 180 TA = 25°C 160 VS = ±5V 140 120 100 80 VS = 5V, 0V 60 VS = 3V, 0V 40 20 –2.0 –2.5 –1.0 3.0 10 OFFSET VOLTAGE (mV) INPUT VOLTAGE (mV) 0 –0.5 –1.5 CHANGE IN OFFSET VOLTAGE (µV) VS = ±5V 1.0 RL = 1k 0 Offset Voltage vs Output Current 15 1.5 0.5 0.5 1809 G14 Open-Loop Gain 2.0 1.0 –2.5 0 5 VS = 5V, 0V 2.0 –2.0 1809 G13 2.5 2.5 –2.5 1 5 4 3 2 SHDN PIN VOLTAGE (V) 1.5 0.5 –1.5 0 1 1809 G12 VS = 3V, 0V 1.0 –350 –450 TA = –55°C 0 INPUT VOLTAGE (mV) INPUT VOLTAGE (mV) SHDN PIN CURRENT (µA) TA = 125°C –200 4 0 5.0 1.5 TA = –55°C 6 Open-Loop Gain 2.0 –50 –100 TA = 25°C 8 Open-Loop Gain 2.5 –150 12 10 1809 G11 SHDN Pin Current vs SHDN Pin Voltage 0 TA = 125°C 14 2 –80 1809 G10 50 VS = 5V, 0V 16 SUPPLY CURRENT (mA) 0.6 0.2 18 120 VCM = V– + 0.5V 0.8 OUTPUT SHORT-CIRCUIT CURRENT (mA) CHANGE IN OFFSET VOLTAGE (mV) 1.0 Supply Current vs SHDN Pin Voltage Output Short-Circuit Current vs Power Supply Voltage –5 –4 –3 –2 –1 0 1 2 3 OUTPUT VOLTAGE (V) 4 5 1809 G16 –15 –100 –80 –60 –40 –20 0 20 40 60 80 100 OUTPUT CURRENT (mA) 1809 G17 0 0 20 40 60 80 100 120 140 160 TIME AFTER POWER UP (SEC) 1809 G18 11 LT1809/LT1810 U W TYPICAL PERFOR A CE CHARACTERISTICS Input Noise Voltage vs Frequency 100 20 VS = 5V, 0V 90 70 60 50 NPN ACTIVE VCM = 4.5V 40 30 PNP ACTIVE VCM = 2.5V 12 8 PNP ACTIVE VCM = 2.5V 4 NPN ACTIVE VCM = 4.5V 10 0 0.1 100 0.1 1 10 FREQUENCY (kHz) 100 45 180 GAIN BANDWIDTH 200 160 40 35 30 PHASE VS = ±5V 40 VS = ±5V 20 20 VS = 3V, 0V 0 10 50 25 0 75 TEMPERATURE (°C) 100 –10 CL = 5pF RL = 1k 1M 10M 100M FREQUENCY (Hz) 1G 1809 G22 12 75 50 25 TEMPERATURE (°C) 0 100 125 1809 G25 Closed-Loop Gain vs Frequency 15 AV = +1 12 AV = +2 9 6 VS = 3V 3 0 VS = ±5V –3 –6 –20 –20 100k 50 – 55 – 25 125 6 GAIN 0 AV = 1 RF = RG = 1k RL = 1k RISING AND FALLING SLEW RATE 100 9 60 GAIN (dB) GAIN (dB) 12 80 PHASE (DEG) 30 200 Closed-Loop Gain vs Frequency 15 100 VS = 3V, 0V 250 1809 G24 Gain and Phase vs Frequency 60 VS = 5V, 0V 300 150 GAIN BANDWIDTH 150 –55 –25 VS = ±5V 350 VS = 3V, 0V 1809 G23 40 400 45 180 165 50 Slew Rate vs Temperature 50 VS = ±5V 190 170 10 VS = ±5V VS = 3V, 0V 170 2 6 8 4 TOTAL SUPPLY VOLTAGE (V) –6 450 PHASE MARGIN (DEG) 185 GAIN BANDWIDTH (MHz) PHASE MARGIN PHASE MARGIN (DEG) GAIN BANDWIDTH (MHz) 50 35 0 –4 TIME (2 SEC/DIV) 55 40 175 –2 Gain Bandwidth and Phase Margin vs Temperature 55 190 0 1809 G20 Gain Bandwidth and Phase Margin vs Supply Voltage PHASE MARGIN 2 1809 G21 1809 G19 TA = 25°C RL = 1k 4 –10 SLEW RATE (V/µs) 1 10 FREQUENCY (kHz) 6 –8 0 GAIN (dB) 20 16 OUTPUT VOLTAGE (µV/DIV) CURRENT NOISE (pA/√Hz) NOISE VOLTAGE (nV/√Hz) 10 VS = 5V, 0V 8 80 160 0.1Hz to 10Hz Output Voltage Noise Input Noise Current vs Frequency VS = 3V 3 VS = ±5V 0 –3 –6 –9 –9 –40 –12 –12 –60 –15 100k 1M 10M FREQUENCY (Hz) 100M 500M 1809 G26 –15 100k 1M 10M FREQUENCY (Hz) 100M 500M 1809 G27 LT1809/LT1810 U W TYPICAL PERFOR A CE CHARACTERISTICS Common Mode Rejection Ratio vs Frequency 110 600 COMMON MODE REJECTION RATIO (dB) VS = 5V, 0V OUTPUT IMPEDANCE (Ω) 100 10 AV = 10 AV = 2 1 AV = 1 0.1 0.01 100k 1M 10M FREQUENCY (Hz) 100M VS = 5V, 0V 100 90 80 70 60 50 40 30 20 10 10k 500M 1M 10M FREQUENCY (Hz) OVERSHOOT (%) OVERSHOOT (%) RS = 20Ω, RL = ∞ 15 10 30 RS = 20Ω RL = ∞ 25 15 100 CAPACITIVE LOAD (pF) 1k 20ns/DIV VS = ±5V VOUT = ±4V AV = – 1 RL = 500Ω tS = 110ns (SETTLING TIME) 100 CAPACITIVE LOAD (pF) 1000 –50 –40 AV = +1 VO = 2VP-P VS = 5V –50 –60 DISTORTION (dB) DISTORTION (dB) Distortion vs Frequency RL = 1k, 2ND –70 RL = 100Ω, 2ND –80 –90 –90 RL = 100Ω, 3RD RL = 1k, 3RD –100 1809 G34 1809 G33 AV = +1 VO = 2VP-P VS = ±5V RL = 100Ω, 2ND 100M 1809 G31 Distortion vs Frequency –80 10M RL = RS = 50Ω 10 –40 –60 100k 1M FREQUENCY (Hz) 10k 0 1000 Distortion vs Frequency DISTORTION (dB) 10 20 1809 G32 –70 30 20 5 RL = RS = 50Ω 0 –50 40 OUTPUT SETTLING RESOLUTION (2mV/DIV) RS = 10Ω RL = ∞ 35 10 –40 NEGATIVE SUPPLY 50 INPUT SIGNAL GENERATION (2V/DIV) VS = 5V, 0V 45 AV = +2 RS = 10Ω, RL = ∞ 10 60 0.01% Settling Time 40 5 POSITIVE SUPPLY 70 100M 500M 50 30 20 80 Series Output Resistor vs Capacitive Load VS = 5V, 0V AV = +1 25 VS = 5V, 0V TA = 25°C 90 1809 G30 Series Output Resistor vs Capacitive Load 35 100 0 100k 1809 G28 40 Power Supply Rejection Ratio vs Frequency POWER SUPPLY REJECTION RATIO (dB) Output Impedance vs Frequency AV = +2 VO = 2VP-P VS = ±5V –60 RL = 100Ω, 2ND –70 –80 –90 RL = 100Ω, 3RD –100 RL = 1k, 3RD RL = 1k, 2ND –100 RL = 100Ω, 3RD –110 0.3 1 RL = 1k, 3RD RL = 1k, 2ND –110 0.3 1 10 30 –110 0.3 1 10 30 FREQUENCY (MHz) FREQUENCY (MHz) 1809 G35 10 30 FREQUENCY (MHz) 1809 G36 1809 G37 13 LT1809/LT1810 U W TYPICAL PERFOR A CE CHARACTERISTICS Maximum Undistorted Output Signal vs Frequency Distortion vs Frequency DISTORTION (dB) –50 4.6 AV = +2 VO = 2VP-P VS = 5V –60 RL = 100Ω, 2ND –70 RL = 100Ω, 3RD –80 RL = 1k, 2ND RL = 1k, 3RD –90 –100 –110 0.3 1 10 OUTPUT VOLTAGE SWING (VP-P) –40 VS = 5V 4.5 AV = –1 4.4 4.3 AV = +2 4.2 4.1 4.0 3.9 0.1 30 1 10 FREQUENCY (MHz) FREQUENCY (MHz) 1809 G38 ±5V Large-Signal Response VS = ±5V AV = +1 RL = 1k 10ns/DIV 1809 G39 ±5V Small-Signal Response VS = ±5V AV = +1 RL = 1k 1809 G40 5V Small-Signal Response 10ns/DIV 5V Large-Signal Response 14 1809 G43 1809 G42 VSHDN 0V 0V VOUT 0V 0V 10ns/DIV 10ns/DIV Shutdown Response VIN (1V/DIV) VS = 5V AV = +1 RL = 1k VS = 5V AV = +1 RL = 1k 1809 G41 Output Overdriven Recovery VOUT (2V/DIV) 100 VS = 5V, 0V AV = +2 100ns/DIV 1809 G44 VS = 5V, 0V AV = +2 RL = 100Ω 100ns/DIV 1809 G44 LT1809/LT1810 U W U U APPLICATIO S I FOR ATIO Rail-to-Rail Characteristics Power Dissipation The LT1809/LT1810 have an input and output signal range that includes both negative and positive power supply. Figure 1 depicts a simplified schematic of the amplifier. The input stage is comprised of two differential amplifiers, a PNP stage Q1/Q2 and a NPN stage Q3/Q4 that are active over different ranges of common mode input voltage. The PNP differential pair is active for common mode voltages between the negative supply to approximately 1.5V below the positive supply. As the input voltage moves closer toward the positive supply, the transistor Q5 will steer the tail current I1 to the current mirror Q6/Q7, activating the NPN differential pair and causing the PNP pair to become inactive for the rest of the input common mode range up to the positive supply. The LT1809/LT1810 amplifiers combine high speed with large output current in a small package, so there is a need to ensure that the die’s junction temperature does not exceed 150°C. The LT1809 is housed in an SO-8 package or a 6-lead SOT-23 package and the LT1810 is in an SO-8 or 8-lead MSOP package. All packages have the V – supply pin fused to the lead frame to enhance the thermal conductance when connecting to a ground plane or a large metal trace. Metal trace and plated through-holes can be used to spread the heat generated by the device to the backside of the PC board. For example, on a 3/32" FR-4 board with 2oz copper, a total of 660 square millimeters connected to Pin␣ 4 of LT1810 in an SO-8 package (330 square millimeters on each side of the PC board) will bring the thermal resistance, θJA, to about 85°C/W. Without extra metal trace connected to the V – pin to provide a heat sink, the thermal resistance will be around 105°C/W. More information on thermal resistance for all packages with various metal areas connecting to the V – pin is provided in Tables 1, 2 and 3 for thermal consideration. A pair of complementary common emitter stages Q14/Q15 form the output stage, enabling the output to swing from rail-to-rail. The capacitors C1 and C2 form the local feedback loops that lower the output impedance at high frequency. These devices are fabricated on Linear Technology’s proprietary high speed complementary bipolar process. V+ R6 10k R3 Q16 V+ Q17 V+ ESDD5 D9 SHDN R7 100k R4 R5 V– ESDD1 D1 ESDD2 Q12 Q11 I1 Q13 Q15 C2 +IN D6 D8 ESDD6 V– D5 –IN Q5 VBIAS OUT D7 V– Q1 Q2 D3 ESDD3 V– I2 CC Q4 Q3 ESDD4 BIAS GENERATION D2 BUFFER AND OUTPUT BIAS Q10 V+ D4 Q9 Q8 C1 Q7 Q14 Q6 R1 V– R2 1809 F01 Figure 1. LT1809 Simplified Schematic Diagram 15 LT1809/LT1810 U W U U APPLICATIO S I FOR ATIO Table 1. LT1809 6-Lead SOT-23 Package connected to its V – pin has a thermal resistance of 105°C/W, θJA. Operating on ±5V supplies with both amplifiers simultaneously driving 50Ω loads, the worstcase power dissipation is given by: COPPER AREA TOPSIDE (mm2) BOARD AREA (mm2) THERMAL RESISTANCE (JUNCTION-TO-AMBIENT) 270 2500 135°C/W 100 2500 145°C/W 20 2500 160°C/W PD(MAX) = 2 • (10 • 25mA) + 2 • (2.5)2/50 0 2500 200°C/W = 0.5 + 0.250 = 0.750W Device is mounted on topside. The maximum ambient temperature that the part is allowed to operate is: Table 2. LT1809/LT1810 SO-8 Package COPPER AREA TOPSIDE BACKSIDE (mm2) (mm2) BOARD AREA (mm2) THERMAL RESISTANCE (JUNCTION-TO-AMBIENT) 1100 1100 2500 65°C/W 330 330 2500 85°C/W 35 35 2500 95°C/W 35 0 2500 100°C/W 0 0 2500 105°C/W Device is mounted on topside. Table 3. LT1810 8-Lead MSOP Package COPPER AREA TOPSIDE BACKSIDE (mm2) (mm2) BOARD AREA THERMAL RESISTANCE (mm2) (JUNCTION-TO-AMBIENT) 540 540 2500 110°C/W 100 100 2500 120°C/W 100 0 2500 130°C/W 30 0 2500 135°C/W 0 0 2500 140°C/W Device is mounted on topside. Junction temperature TJ is calculated from the ambient temperature TA and power dissipation PD as follows: TJ = TA + (PD • θJA) The power dissipation in the IC is the function of the supply voltage, output voltage and the load resistance. For a given supply voltage, the worst-case power dissipation PD(MAX) occurs at the maximum supply current with the output voltage at half of either supply voltage (or the maximum swing is less than 1/2 the supply voltage). PD(MAX) is given by: PD(MAX) = (VS • IS(MAX)) + (VS/2)2/RL Example: An LT1810 in SO-8 mounted on a 2500mm 2 area of PC board without any extra heat spreading plane 16 TA = TJ – (PD(MAX) • 105°C/W) = 150°C – (0.750W • 105°C/W) = 71°C To operate the device at higher ambient temperature, connect more metal area to the V – pin to reduce the thermal resistance of the package as indicated in Table 2. Input Offset Voltage The offset voltage will change depending upon which input stage is active and the maximum offset voltage is guaranteed to be less than 3mV. The change of VOS over the entire input common mode range (CMRR) is less than 2.5mV on a single 5V and 3V supply. Input Bias Current The input bias current polarity depends upon a given input common voltage at whichever input stage is operating. When the PNP input stage is active, the input bias currents flow out of the input pins and flow into the input pins when the NPN input stage is activated. Because the input offset current is less than the input bias current, matching the source resistances at the input pin will reduce total offset error. Output The LT1809/LT1810 can deliver a large output current, so the short-circuit current limit is set around 90mA to prevent damage to the device. Attention must be paid to keep the junction temperature of the IC below the absolute maximum rating of 150°C (refer to the Power Dissipation section) when the output is continuously short circuited. The output of the amplifier has reverse-biased diodes connected to each supply. If the output is forced LT1809/LT1810 U W U U APPLICATIO S I FOR ATIO beyond either supply, unlimited current will flow through these diodes. If the current is transient and limited to several hundred milliamps, no damage to the device will occur. Overdrive Protection When the input voltage exceeds the power supplies, two pairs of crossing diodes, D1 to D4, will prevent the output from reversing polarity. If the input voltage exceeds either power supply by 700mV, diodes D1/D2 or D3/D4 will turn on, keeping the output at the proper polarity. For the phase reversal protection to perform properly, the input current must be limited to less than 5mA. If the amplifier is severely overdriven, an external resistor should be used to limit the overdrive current. The LT1809/LT1810’s input stages are also protected against differential input voltages of 1.4V or higher by back-to-back diodes, D5/D8, that prevent the emitter-base breakdown of the input transistors. The current in these diodes should be limited to less than 10mA when they are active. The worst-case differential input voltage usually occurs when the input is driven while the output is shorted to ground in a unity-gain configuration. In addition, the amplifier is protected against ESD strikes up to 3kV on all pins by a pair of protection diodes on each pin that are connected to the power supplies as shown in Figure 1. Capacitive Load The LT1809/LT1810 is optimized for high bandwidth and low distortion applications. It can drive a capacitive load about 20pF in a unity-gain configuration and more with higher gain. When driving a larger capacitive load, a resistor of 10Ω to 50Ω should be connected between the output and the capacitive load to avoid ringing or oscillation. The feedback should still be taken from the output so that the resistor will isolate the capacitive load to ensure stability. Graphs on capacitive loads indicate the transient response of the amplifier when driving capacitive load with a specified series resistor. Feedback Components When feedback resistors are used to set up gain, care must be taken to ensure that the pole formed by the feedback resistors and the total capacitance at the inverting input does not degrade stability. For instance, the LT1809 in a noninverting gain of 2, set up with two 1K resistors and a capacitance of 3pF (device plus PC board), will probably ring in transient response. The pole that is formed at 106MHz will reduce phase margin by 34 degrees when the crossover frequency of the amplifier is around 70MHz. A capacitor of 3pF or higher connected across the feedback resistor will eliminate any ringing or oscillation. SHDN Pin The LT1809 has a SHDN pin to reduce the supply current to less than 1.25mA. When the SHDN pin is pulled low, it will generate a signal to power down the device. If the pin is left unconnected, an internal pull-up resistor of 10k will keep the part fully operating as shown in Figure 1. The output will be high impedance during shutdown, and the turn-on and turn-off time is less than 100ns. Because the inputs are protected by a pair of back-to-back diodes, the input signal will feed through to the output during shutdown mode if the amplitude of signal between the inputs is larger than 1.4V. 17 LT1809/LT1810 U TYPICAL APPLICATIO S Driving A/D Converters The LT1809/LT1810 have a 27ns settling time to 0.1% of a 2V step signal and 20Ω output impedance at 100MHz making it ideal for driving high speed A/D converters. With the rail-to-rail input and output and low supply voltage operation, the LT1809 is also desirable for single supply applications. As shown in Figure 2, the LT1809 drives a 10Msps, 12-bit ADC, the LTC1420. The lowpass filter, R3 and C1, reduces the noise and distortion products that might come from the input signal. High quality capacitors and resistors, an NPO chip capacitor and metal-film surface mount resistors, should be used since these components can add to distortion. The voltage glitch of the converter, due to its sampling nature, is buffered by the LT1809 and the ability of the amplifier to settle it quickly will affect the spurious-free dynamic range of the system. Figure 2 to Figure 7 depict the LT1809 driving the LTC1420 at different configurations and voltage supplies. The FFT responses show better than 90dB of SFDR for a ±5V supply, and 80dB on a 5V single supply for the 1.394MHz signal. 5V 5V VIN 1VP-P + R3 49.9Ω LT1809 +AIN C1 470pF – –AIN LTC1420 PGA GAIN = 1 REF = 2.048V R2 1k –5V 1809 F02 –5V R1 1k Figure 2. Noninverting A/D Driver 0 VS = ±5V AV = +2 fSAMPLE = 10Msps fIN = 1.394MHz SFDR = 90dB AMPLITUDE (dB) –20 –40 –60 –80 –100 –120 0 1 2 3 FREQUENCY (MHz) 4 5 1809 F03 Figure 3. 4096 Point FFT Response 18 • • • 12 BITS 10Msps LT1809/LT1810 U TYPICAL APPLICATIO S 0 VS = ±5V AV = –1 fSAMPLE = 10Msps fIN = 1.394MHz SFDR = 90dB AMPLITUDE (dB) –20 1k 5V 5V VIN 2VP-P 1k – 49.9Ω LT1809 +AIN + 470pF –AIN LTC1420 PGA GAIN = 1 REF = 2.048V –5V • • • 12 BITS 10Msps –40 –60 –80 –100 –120 1809 F04 0 1 –5V 2 3 FREQUENCY (MHz) 5 4 1809 F05 Figure 4. Inverting A/D Driver Figure 5. 4096 Point FFT Response 0 VS = 5V AV = +2 fSAMPLE = 10Msps fIN = 1.394MHz SFDR = 80dB –20 5V VIN 1VP-P ON 2.5V DC 3 7 + 6 LT1809 2 – 49.9Ω 1 4 470pF 1k 1 +AIN 2 –AIN LTC1420 PGA GAIN = 2 REF = 4.096V • • • 12 BITS 10Msps AMPLITUDE (dB) 5V –40 –60 –80 VCM 3 1µF 1k 1809 F06 –100 –120 0 0.15µF 1 2 3 FREQUENCY (MHz) 4 5 1809 F07 Figure 6. Single Supply A/D Driver Figure 7. 4096 Point FFT Response 19 LT1809/LT1810 U TYPICAL APPLICATIO S Single Supply Video Line Driver The LT1809 is a wideband rail-to-rail op amp with a large output current that allows it to drive video signals in low supply applications. Figure 8 depicts a single supply video line driver with AC coupling to minimize the quiescent power dissipation. Resistors R1 and R2 are used to levelshift the input and output to provide the largest signal swing. A gain of 2 is set up with R3 and R4 to restore the signal at VOUT, which is attenuated by 6dB due to the matching of the 75Ω line with the back-terminated resistor, R5. The back termination will eliminate any reflection of the signal that comes from the load. The input termination resistor, RT, is optional—it is used only if matching of the incoming line is necessary. The values of C1, C2 and C3 are selected to minimize the droop of the luminance signal. In some less stringent requirements, the value of capacitors could be reduced. The – 3dB bandwidth of the driver is about 95MHz on 5V supply and the amount of peaking will vary upon the value of capacitor C4. 5V + R1 5k VIN RT 75Ω 3 R2 5k C3 1000µF 7 + 6 LT1809 2 – 4 75Ω COAX CABLE VOUT RLOAD 75Ω R4 1k 1809 F08 C4 3pF R3 1k + R5 75Ω + C1 33µF C2 150µF Figure 8. 5V Single Supply Video Line Driver 5 4 VS = 5V VOLTAGE GAIN (dB) 3 2 1 0 –1 –2 –3 –4 –5 0.2 1 10 FREQUENCY (MHz) 100 1809 F09 Figure 9. Video Line Driver Frequency Response 20 LT1809/LT1810 U PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted. S6 Package 6-Lead Plastic SOT-23 (LTC DWG # 05-08-1634) 2.80 – 3.00 (0.110 – 0.118) (NOTE 3) 1.90 (0.074) REF 2.6 – 3.0 (0.110 – 0.118) 1.50 – 1.75 (0.059 – 0.069) 0.35 – 0.55 (0.014 – 0.022) 0.00 – 0.15 (0.00 – 0.006) 0.09 – 0.20 (0.004 – 0.008) (NOTE 2) 0.95 (0.037) REF 0.90 – 1.45 (0.035 – 0.057) 0.35 – 0.50 0.90 – 1.30 (0.014 – 0.020) (0.035 – 0.051) SIX PLACES (NOTE 2) S6 SOT-23 0898 NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DIMENSIONS ARE INCLUSIVE OF PLATING 3. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 4. MOLD FLASH SHALL NOT EXCEED 0.254mm 5. PACKAGE EIAJ REFERENCE IS SC-74A (EIAJ) 21 LT1809/LT1810 U PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted. MS8 Package 8-Lead Plastic MSOP (LTC DWG # 05-08-1660) 0.118 ± 0.004* (3.00 ± 0.102) 8 7 6 5 0.118 ± 0.004** (3.00 ± 0.102) 0.193 ± 0.006 (4.90 ± 0.15) 1 2 3 4 0.043 (1.10) MAX 0.007 (0.18) 0° – 6° TYP 0.021 ± 0.006 (0.53 ± 0.015) SEATING PLANE 0.009 – 0.015 (0.22 – 0.38) 0.0256 (0.65) BSC * DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE 22 0.034 (0.86) REF 0.005 ± 0.002 (0.13 ± 0.05) MSOP (MS8) 1100 LT1809/LT1810 U PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted. S8 Package 8-Lead Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 0.189 – 0.197* (4.801 – 5.004) 8 7 6 5 0.150 – 0.157** (3.810 – 3.988) 0.228 – 0.244 (5.791 – 6.197) 1 0.010 – 0.020 × 45° (0.254 – 0.508) 0.008 – 0.010 (0.203 – 0.254) 0.053 – 0.069 (1.346 – 1.752) 0°– 8° TYP 0.016 – 0.050 (0.406 – 1.270) 0.014 – 0.019 (0.355 – 0.483) TYP *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 2 3 4 0.004 – 0.010 (0.101 – 0.254) 0.050 (1.270) BSC 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. SO8 1298 23 LT1809/LT1810 U TYPICAL APPLICATIO Single 3V Supply, 4MHz, 4th Order Butterworth Filter Benefiting from a low voltage supply operation, low distortion and rail-to-rail output of LT1809, a low distortion filter that is suitable for antialiasing can be built as shown Figure 10. On a 3V supply, the filter has a passband of 4MHz with 2.5VP-P signal and a stopband that is greater than 70dB to frequency of 100MHz. 232Ω 274Ω 47pF 22pF 232Ω 665Ω – VIN 220pF 274Ω 562Ω – 1/2 LT1810 + 470pF VOUT 1/2 LT1810 + VS 1809 F10 2 Figure 10. Single 3V Supply, 4MHz, 4th Order Butterworth Filter 10 0 –10 GAIN (dB) –20 –30 –40 –50 –60 –70 –80 VS = 3V, 0V VIN = 2.5VP-P –90 10k 100k 1M 10M FREQUENCY (Hz) 100M 1809 F11 Figure 11. Filter Frequency Response RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1395 400MHz Current Feedback Amplifier 800V/µs Slew Rate, Shutdown LT1632/LT1633 Dual/Quad 45MHz, 45V/µs Rail-to-Rail Input and Output Op Amps High DC Accuracy, 1.35mV VOS(MAX), 70mA Output Current, Max Supply Current 5.2mA per Amplifier LT1630/LT1631 Dual/Quad 30MHz, 10V/µs Rail-to-Rail Input and Output Op Amps High DC Accuracy, 525µV VOS(MAX), 70mA Output Current, Max Supply Current 4.4mA per Amplifier LT1806/LT1807 Single/Dual 325MHz, 140V/µs Rail-to-Rail Input and Output Op Amps High DC Accuracy, 550µV VOS(MAX), Low Noise 3.5nV/√Hz, Low Distortion –80dBc at 5MHz 24 Linear Technology Corporation sn180910 180910fs LT/TP 1100 4K • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408)432-1900 ● FAX: (408) 434-0507 ● www.linear-tech.com LINEAR TECHNOLOGY CORPORATION 2000