LT6202/LT6203/LT6204 Single/Dual/Quad 100MHz, Rail-to-Rail Input and Output, Ultralow 1.9nV/√Hz Noise, Low Power Op Amps U DESCRIPTIO FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ The LT®6202/LT6203/LT6204 are single/dual/quad low noise, rail-to-rail input and output unity gain stable op amps that feature 1.9nV/√Hz noise voltage and draw only 2.5mA of supply current per amplifier. These amplifiers combine very low noise and supply current with a 100MHz gain bandwidth product, a 25V/µs slew rate, and are optimized for low supply signal conditioning systems. Low Noise Voltage: 1.9nV/√Hz (100kHz) Low Supply Current: 3mA/Amp Max Gain Bandwidth Product: 100MHz Dual LT6203 in Tiny DFN Package Low Distortion: –80dB at 1MHz Low Offset Voltage: 500µV Max Wide Supply Range: 2.5V to 12.6V Input Common Mode Range Includes Both Rails Output Swings Rail-to-Rail Common Mode Rejection Ratio 90dB Typ Unity Gain Stable Low Noise Current: 1.1pA/√Hz Output Current: 30mA Min Operating Temperature Range –40°C to 85°C These amplifiers maintain their performance for supplies from 2.5V to 12.6V and are specified at 3V, 5V and ±5V supplies. Harmonic distortion is less than – 80dBc at 1MHz making these amplifiers suitable in low power data acquisition systems. The LT6202 is available in the 5-pin SOT-23 and the 8-pin SO, while the LT6203 comes in 8-pin SO and MSOP packages with standard op amp pinouts. For compact layouts the LT6203 is also available in a tiny fine line leadless package (DFN), while the quad LT6204 is available in the 16-pin SSOP and 14-pin SO packages. These devices can be used as plug-in replacements for many op amps to improve input/output range and noise performance. U APPLICATIO S ■ ■ ■ ■ ■ ■ Low Noise, Low Power Signal Processing Active Filters Rail-to-Rail Buffer Amplifiers Driving A/D Converters DSL Receivers Battery Powered/Battery Backed Equipment , LTC and LT are registered trademarks of Linear Technology Corporation. U TYPICAL APPLICATIO Low Noise 4- to 2-Wire Local Echo Cancellation Differential Receiver Line Receiver Integrated Noise 25kHz to 150kHz – 2k 1/2 LT1739 5.0 50Ω 1k 1k 4.5 – 1/2 LT6203 1:1 VD LINE DRIVER VL 100Ω LINE • + • VR LINE RECEIVER + 1/2 LT6203 + 1/2 LT1739 – – 50Ω 1k INTEGRATED NOISE (µVRMS) + 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 1k 0 0 2k 20 40 60 80 100 120 140 160 BANDWIDTH (kHz) 6203 TA01a 6203 • TA01b 620234fa 1 LT6202/LT6203/LT6204 W W U W ABSOLUTE AXI U RATI GS (Note 1) Total Supply Voltage (V+ to V–) ............................ 12.6V Input Current (Note 2) ........................................ ±40mA 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 Junction Temperature (DD Package) .................... 125°C Storage Temperature Range ..................–65°C to 150°C Storage Temperature Range (DD Package) ........................................–65°C to 125°C Lead Temperature (Soldering, 10 sec).................. 300°C U W U PACKAGE/ORDER I FOR ATIO TOP VIEW TOP VIEW NC 1 5 V+ OUT 1 –IN 2 + – V– 2 +IN 3 4 –IN +IN 3 V– S5 PACKAGE 5-LEAD PLASTIC TSOT-23 – + 4 8 NC 7 V+ 6 OUT 5 NC S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150°C, θJA = 190°C/W TJMAX = 150°C, θJA = 250°C/W ORDER PART NUMBER S5 PART MARKING* ORDER PART NUMBER S8 PART MARKING LT6202CS5 LT6202IS5 LTG6 LT6202CS8 LT6202IS8 6202 6202I TOP VIEW TOP VIEW OUT B 6 –IN B 5 +IN B +IN A 3 A V– 4 B DD PACKAGE 8-LEAD (3mm × 3mm) PLASTIC DFN TJMAX = 125°C, θJA = 160°C/W UNDERSIDE METAL CONNECTED TO V– TOP VIEW OUT A –IN A +IN A V– 1 2 3 4 – + + 8 V OUT A 1 8 7 6 5 V+ OUT B –IN B +IN B –IN A 2 +IN A 3 V MS8 PACKAGE 8-LEAD PLASTIC MSOP TJMAX = 150°C, θJA = 250°C/W – 7 OUT B – + 4 + V 7 – 8 –IN A 2 + OUT A 1 – + 6 –IN B 5 +IN B S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150°C, θJA = 190°C/W ORDER PART NUMBER DD PART MARKING* ORDER PART NUMBER MS8 PART MARKING ORDER PART NUMBER S8 PART MARKING LT6203CDD LT6203IDD LAAP LT6203CMS8 LT6203IMS8 LTB2 LTB3 LT6203CS8 LT6203IS8 6203 6203I *The temperature grades are identified by a label on the shipping container. 620234fa 2 LT6202/LT6203/LT6204 U W U PACKAGE/ORDER I FOR ATIO 16 –IN A 2 15 –IN D – + V + A D + +IN A 3 – 4 +IN B 5 OUT D 14 +IN D 13 V + –B –IN B 6 + C– OUT B 7 NC 8 – LT6204CGN LT6204IGN 11 –IN C 10 OUT C 9 GN PART MARKING NC GN PACKAGE 16-LEAD NARROW PLASTIC SSOP TJMAX = 150°C, θJA = 135°C/W OUT A 1 –IN A 2 +IN A V 12 +IN C 6204 6204I ORDER PART NUMBER TOP VIEW + 3 14 OUT D – + A D 13 –IN D + OUT A 1 ORDER PART NUMBER – TOP VIEW 12 +IN D 11 V 4 +IN B 5 –IN B 6 OUT B 7 + –B + C– LT6204CS LT6204IS – 10 +IN C 9 –IN C 8 OUT C S PACKAGE 14-LEAD PLASTIC SO TJMAX = 150°C, θJA = 150°C/W Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS unless otherwise noted. TA = 25°C, VS =5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, SYMBOL PARAMETER CONDITIONS TYP MAX UNITS VOS Input Offset Voltage VS = 5V, 0V, VCM = Half Supply LT6203, LT6204, LT6202S8 LT6202 SOT-23 0.1 0.1 0.5 0.7 mV mV VS = 3V, 0V, VCM = Half Supply LT6203, LT6204, LT6202S8 LT6202 SOT-23 0.6 0.6 1.5 1.7 mV mV VS = 5V, 0V, VCM = V + to V – LT6203, LT6204, LT6202S8 LT6202 SOT-23 0.25 0.25 2.0 2.2 mV mV VS = 3V, 0V, VCM = V + to V – LT6203, LT6204, LT6202S8 LT6202 SOT-23 1.0 1.0 3.5 3.7 mV mV Input Offset Voltage Match (Channel-to-Channel) (Note 6) VCM = Half Supply VCM = V– to V+ 0.15 0.3 0.8 1.8 mV mV Input Bias Current VCM = Half Supply VCM = V+ VCM = V – –1.3 1.3 –3.3 2.5 µA µA µA = V – to V+ 4.7 11.3 µA 0.1 0.6 µA Input Offset Current VCM = Half Supply VCM = V+ VCM = V – 0.12 0.07 0.12 1 1 1.1 µA µA µA Input Noise Voltage 0.1Hz to 10Hz 800 Input Noise Voltage Density f = 100kHz, VS = 5V f = 10kHz, VS = 5V 2 2.9 Input Noise Current Density, Balanced Input Noise Current Density, Unbalanced f = 10kHz, VS = 5V 0.75 1.1 Input Resistance Common Mode Differential Mode 4 12 IB ∆IB IB Shift VCM IB Match (Channel-to-Channel) (Note 6) IOS en in MIN –7.0 –8.8 nVP-P 4.5 nV/√Hz nV/√Hz pA/√Hz pA/√Hz MΩ kΩ 620234fa 3 LT6202/LT6203/LT6204 ELECTRICAL CHARACTERISTICS unless otherwise noted. TA = 25°C, VS =5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, SYMBOL PARAMETER CONDITIONS CIN Input Capacitance Common Mode Differential Mode AVOL Large Signal Gain VS = 5V, VO = 0.5V to 4.5V, RL = 1k to VS/2 VS = 5V, VO = 1V to 4V, RL = 100 to VS/2 VS = 3V, VO = 0.5V to 2.5V, RL = 1k to VS/2 CMRR Common Mode Rejection Ratio PSRR MIN TYP MAX UNITS 1.8 1.5 pF pF 40 8.0 17 70 14 40 V/mV V/mV V/mV VS = 5V, VCM = V – to V+ VS = 5V, VCM = 1.5V to 3.5V VS = 3V, VCM = V – to V+ 60 80 56 83 100 80 dB dB dB CMRR Match (Channel-to-Channel) (Note 6) VS = 5V, VCM = 1.5V to 3.5V 85 120 dB Power Supply Rejection Ratio VS = 2.5V to 10V, VCM = 0V 60 74 dB PSRR Match (Channel-to-Channel) (Note 6) VS = 2.5V to 10V, VCM = 0V 70 100 dB Minimum Supply Voltage (Note 7) 2.5 V VOL Output Voltage Swing LOW Saturation (Note 8) No Load ISINK = 5mA VS = 5V, ISINK = 20mA VS = 3V, ISINK = 15mA 5 85 240 185 50 190 460 350 mV mV mV mV VOH Output Voltage Swing HIGH Saturation (Note 8) No Load ISOURCE = 5mA VS = 5V, ISOURCE = 20mA VS = 3V, ISOURCE = 15mA 25 90 325 225 75 210 600 410 mV mV mV mV ISC Short-Circuit Current VS = 5V VS = 3V IS Supply Current per Amp VS = 5V VS = 3V 2.5 2.3 GBW Gain Bandwidth Product Frequency = 1MHz, VS = 5V 90 MHz SR Slew Rate VS = 5V, AV = –1, RL = 1k, VO = 4V 17 24 V/µs 1.8 2.5 MHz 85 ns ±30 ±25 FPBW Full Power Bandwidth (Note 10) VS = 5V, VOUT = 3VP-P tS Settling Time 0.1%, VS = 5V, VSTEP = 2V, AV = –1, RL = 1k ±45 ±40 mA mA 3.0 2.85 mA mA The ● denotes the specifications which apply over 0°C < TA < 70°C temperature range. VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted. SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage VS = 5V, 0V, VCM = Half Supply LT6203, LT6204, LT6202S8 LT6202 SOT-23 VOS TC MIN TYP MAX UNITS ● ● 0.2 0.2 0.7 0.9 mV mV VS = 3V, 0V, VCM = Half Supply LT6203, LT6204, LT6202S8 LT6202 SOT-23 ● ● 0.6 0.6 1.7 1.9 mV mV VS = 5V, 0V, VCM = V + to V – LT6203, LT6204, LT6202S8 LT6202 SOT-23 ● ● 0.7 0.7 2.5 2.7 mV mV VS = 3V, 0V, VCM = V + to V – LT6203, LT6204, LT6202S8 LT6202 SOT-23 ● ● 1.2 1.2 4.0 4.2 mV mV Input Offset Voltage Drift (Note 9) VCM = Half Supply ● 3.0 9.0 µV/°C Input Offset Voltage Match (Channel-to-Channel) (Note 6) VCM = Half Supply VCM = V – to V + ● ● 0.15 0.5 0.9 2.3 mV mV 620234fa 4 LT6202/LT6203/LT6204 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over 0°C < TA < 70°C temperature range. VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted. SYMBOL PARAMETER CONDITIONS IB Input Bias Current VCM = Half Supply VCM = V + VCM = V – ● ● ● VCM = V – to V + ∆IB IB Shift IB Match (Channel-to-Channel) (Note 6) MIN TYP MAX –7.0 –1.3 1.3 –3.3 2.5 µA µA µA ● 4.7 11.3 µA ● 0.1 0.6 µA 0.15 0.10 0.15 1 1 1.1 µA µA µA –8.8 UNITS IOS Input Offset Current VCM = Half Supply VCM = V + VCM = V – ● ● ● AVOL Large Signal Gain VS = 5V, VO = 0.5V to 4.5V, RL = 1k to VS /2 VS = 5V, VO = 1.5V to 3.5V, RL = 100 to VS /2 VS = 3V, VO = 0.5V to 2.5V, RL = 1k to VS /2 ● ● ● 35 6.0 15 60 12 36 V/mV V/mV V/mV CMRR Common Mode Rejection Ratio VS = 5V, VCM = V – to V + VS = 5V, VCM = 1.5V to 3.5V VS = 3V, VCM = V – to V + ● ● ● 60 78 56 83 97 75 dB dB dB ● 83 100 dB PSRR CMRR Match (Channel-to-Channel) (Note 6) VS = 5V, VCM = 1.5V to 3.5V Power Supply Rejection Ratio VS = 3V to 10V, VCM = 0V ● 60 70 dB PSRR Match (Channel-to-Channel) (Note 6) VS = 3V to 10V, VCM = 0V Minimum Supply Voltage (Note 7) ● 70 100 dB ● 3.0 VOL Output Voltage Swing LOW Saturation (Note 8) No Load ISINK = 5mA ISINK = 15mA ● ● ● 5.0 95 260 60 200 365 mV mV mV VOH Output Voltage Swing HIGH Saturation (Note 8) No Load ISOURCE = 5mA VS = 5V, ISOURCE = 20mA VS = 3V, ISOURCE = 15mA ● ● ● ● 50 115 360 260 100 230 635 430 mV mV mV mV ISC Short-Circuit Current VS = 5V VS = 3V ● ● IS Supply Current per Amp VS = 5V VS = 3V ● ● GBW Gain Bandwidth Product Frequency = 1MHz ● 87 MHz SR Slew Rate VS = 5V, AV = –1, RL = 1k, VO = 4V ● 15 21 V/µs FPBW Full Power Bandwidth (Note 10) VS = 5V, VOUT = 3VP-P ● 1.6 2.2 MHz ±20 ±20 V ±33 ±30 3.1 2.75 mA mA 3.85 3.50 mA mA The ● denotes the specifications which apply over –40°C < TA < 85°C temperature range. VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted. (Note 5) SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage VS = 5V, 0V, VCM = Half Supply LT6203, LT6204, LT6202S8 LT6202 SOT-23 MIN TYP MAX UNITS ● ● 0.2 0.2 0.8 1.0 mV mV VS = 3V, 0V, VCM = Half Supply LT6203, LT6204, LT6202S8 LT6202 SOT-23 ● ● 0.6 0.6 2.0 2.2 mV mV VS = 5V, 0V, VCM = V + to V – LT6203, LT6204, LT6202S8 LT6202 SOT-23 ● ● 1.0 1.0 3.0 3.5 mV mV VS = 3V, 0V, VCM = V + to V – LT6203, LT6204, LT6202S8 LT6202 SOT-23 ● ● 1.4 1.4 4.5 4.7 mV mV 620234fa 5 LT6202/LT6203/LT6204 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over –40°C < TA < 85°C temperature range. VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted. (Note 5) SYMBOL PARAMETER CONDITIONS TYP MAX UNITS VOS TC Input Offset Voltage Drift (Note 9) VCM = Half Supply ● 3.0 9.0 µV/°C Input Offset Voltage Match (Channel-to-Channel) (Note 6) VCM = Half Supply VCM = V – to V+ ● ● 0.3 0.7 1.0 2.5 mV mV Input Bias Current VCM = Half Supply VCM = V+ VCM = V – ● ● ● –1.3 1.3 –3.3 2.5 µA µA µA ● 4.7 11.3 µA ● 0.1 0.6 µA 0.2 0.2 0.2 1 1.1 1.2 µA µA µA IB ∆IB IB Shift VCM = V – to V+ IB Match (Channel-to-Channel) (Note 6) MIN –7.0 –8.8 IOS Input Offset Current VCM = Half Supply VCM = V+ VCM = V – ● ● ● AVOL Large Signal Gain VS = 5V, VO = 0.5V to 4.5V, RL = 1k to VS /2 VS = 5V, VO = 1.5V to 3.5V, RL = 100 to VS /2 VS = 3V, VO = 0.5V to 2.5V, RL = 1k to VS /2 ● ● ● 32 4.0 13 60 10 32 V/mV V/mV V/mV CMRR Common Mode Rejection Ratio VS = 5V, VCM = V – to V+ VS = 5V, VCM = 1.5V to 3.5V VS = 3V, VCM = V – to V+ ● ● ● 60 75 56 80 95 75 dB dB dB CMRR Match (Channel-to-Channel) (Note 6) VS = 5V, VCM = 1.5V to 3.5V ● 80 100 dB Power Supply Rejection Ratio VS = 3V to 10V, VCM = 0V ● 60 70 dB PSRR Match (Channel-to-Channel) (Note 6) VS = 3V to 10V, VCM = 0V ● 70 100 dB Minimum Supply Voltage (Note 7) ● 3.0 PSRR V VOL Output Voltage Swing LOW Saturation (Note 8) No Load ISINK = 5mA ISINK = 15mA ● ● ● 6 95 210 70 210 400 mV mV mV VOH Output Voltage Swing HIGH Saturation (Note 8) No Load ISOURCE = 5mA VS = 5V, ISOURCE = 15mA VS = 3V, ISOURCE = 15mA ● ● ● ● 55 125 370 270 110 240 650 650 mV mV mV mV ISC Short-Circuit Current VS = 5V VS = 3V ● ● IS Supply Current per Amp VS = 5V VS = 3V ● ● 3.3 3.0 GBW Gain Bandwidth Product Frequency = 1MHz ● 83 SR Slew Rate VS = 5V, AV = –1, RL = 1k, VO = 4V ● 12 17 V/µs FPBW Full Power Bandwidth (Note 10) VS = 5V, VOUT = 3VP-P ● 1.3 1.8 MHz ±15 ±15 ±25 ±23 mA mA 4.1 3.65 mA mA MHz 620234fa 6 LT6202/LT6203/LT6204 ELECTRICAL CHARACTERISTICS TA = 25°C, VS = ±5V; VCM = VOUT = 0V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS TYP MAX VOS Input Offset Voltage LT6203, LT6204, LT6202S8 VCM = 0V VCM = V+ VCM = V – 1.0 2.6 2.3 2.5 5.5 5.0 mV mV mV LT6202 SOT-23 VCM = 0V VCM = V+ VCM = V – 1.0 2.6 2.3 2.7 6.0 5.5 mV mV mV Input Offset Voltage Match (Channel-to-Channel) (Note 6) VCM = 0V VCM = V – to V+ 0.2 0.4 1.0 2.0 mV mV Input Bias Current VCM = Half Supply VCM = V+ VCM = V – –1.3 1.3 –3.8 3.0 µA µA µA 5.3 12.5 µA 0.1 0.6 µA VCM = Half Supply VCM = V+ VCM = V – 0.15 0.2 0.35 1 1.2 1.3 µA µA µA 4.5 IB ∆IB IB Shift VCM MIN –7.0 –9.5 = V – to V+ IB Match (Channel-to-Channel) (Note 6) IOS Input Offset Current UNITS Input Noise Voltage 0.1Hz to 10Hz 800 nVP-P en Input Noise Voltage Density f = 100kHz f = 10kHz 1.9 2.8 nV/√Hz nV/√Hz in Input Noise Current Density, Balanced Input Noise Current Density, Unbalanced f = 10kHz 0.75 1.1 Input Resistance Common Mode Differential Mode 4 12 MΩ kΩ CIN Input Capacitance Common Mode Differential Mode 1.8 1.5 pF pF AVOL Large Signal Gain VO = ±4.5V, RL = 1k VO = ±2.5V, RL = 100 75 11 130 19 V/mV V/mV CMRR Common Mode Rejection Ratio VCM = V – to V+ VCM = –2V to 2V 65 85 85 98 dB dB pA/√Hz pA/√Hz CMRR Match (Channel-to-Channel) (Note 6) VCM = –2V to 2V 85 120 dB Power Supply Rejection Ratio VS = ±1.25V to ±5V 60 74 dB PSRR Match (Channel-to-Channel) (Note 6) VS = ±1.25V to ±5V 70 100 dB VOL Output Voltage Swing LOW Saturation (Note 8) No Load ISINK = 5mA ISINK = 20mA 5 87 245 50 190 460 mV mV mV VOH Output Voltage Swing HIGH Saturation (Note 8) No Load ISOURCE = 5mA ISOURCE = 20mA 40 95 320 95 210 600 mV mV mV ISC Short-Circuit Current IS Supply Current per Amp GBW Gain Bandwidth Product Frequency = 1MHz 70 100 MHz SR Slew Rate AV = –1, RL = 1k, VO = 4V 18 25 V/µs 1.9 2.6 MHz 78 ns PSRR ±30 ±40 2.8 mA 3.5 mA FPBW Full Power Bandwidth (Note 10) VOUT = 3VP-P tS Settling Time 0.1%, VSTEP = 2V, AV = –1, RL = 1k dG Differential Gain (Note 11) AV = 2, RF = RG = 499Ω, RL = 2k 0.05 % dP Differential Phase (Note 11) AV = 2, RF = RG = 499Ω, RL = 2k 0.03 DEG 620234fa 7 LT6202/LT6203/LT6204 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over 0°C < TA < 70°C temperature range. VS = ±5V; VCM = VOUT = 0V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage LT6203, LT6204, LT6202S8 VCM = 0V VCM = V+ VCM = V – VOS TC IB ∆IB TYP MAX ● ● ● 1.6 3.2 2.8 2.8 6.8 5.8 mV mV mV LT6202 SOT-23 VCM = 0V VCM = V+ VCM = V – ● ● ● 1.6 3.2 2.8 3.0 7.3 6.3 mV mV mV Input Offset Voltage Drift (Note 9) VCM = Half Supply ● 7.5 24 µV/°C Input Offset Voltage Match (Channel-to-Channel) (Note 6) VCM = 0V VCM = V – to V+ ● ● 0.2 0.5 1.0 2.2 mV mV Input Bias Current VCM = Half Supply VCM = V+ VCM = V – ● ● ● –1.4 1.8 –4.3 3.6 µA µA µA IB Shift VCM = V – to V+ IB Match (Channel-to-Channel) (Note 6) MIN –7.0 –10 UNITS ● 5.4 13 µA ● 0.15 0.7 µA 0.1 0.2 0.4 1 1.2 1.4 µA µA µA IOS Input Offset Current VCM = Half Supply VCM = V+ VCM = V – ● ● ● AVOL Large Signal Gain VO = ±4.5V, RL = 1k VO = ±2V, RL = 100 ● ● 70 10 120 18 V/mV V/mV CMRR Common Mode Rejection Ratio VCM = V – to V+ VCM = –2V to 2V ● ● 65 83 84 95 dB dB CMRR Match (Channel-to-Channel) (Note 6) VCM = –2V to 2V ● 83 110 dB Power Supply Rejection Ratio VS = ±1.5V to ±5V ● 60 70 dB 70 100 PSRR PSRR Match (Channel-to-Channel) (Note 6) VS = ±1.5V to ±5V ● VOL Output Voltage Swing LOW Saturation (Note 8) No Load ISINK = 5mA ISINK = 15mA ● ● ● 6 95 210 70 200 400 mV mV mV VOH Output Voltage Swing HIGH Saturation (Note 8) No Load ISOURCE = 5mA ISOURCE = 20mA ● ● ● 65 125 350 120 240 625 mV mV mV ISC Short-Circuit Current ● IS Supply Current per Amp ● ±25 dB ±34 3.5 mA 4.3 mA GBW Gain Bandwidth Product Frequency = 1MHz ● 95 MHz SR Slew Rate AV = –1, RL = 1k, VO = 4V ● 16 22 V/µs FPBW Full Power Bandwidth (Note 10) VOUT = 3VP-P ● 1.7 2.3 MHz The ● denotes the specifications which apply over –40°C < TA < 85°C temperature range. VS = ±5V; VCM = VOUT = 0V, unless otherwise noted. (Note 5) SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage LT6203, LT6204, LT6202S8 VCM = 0V VCM = V+ VCM = V – LT6202 SOT-23 VCM = 0V VCM = V+ VCM = V – MIN TYP MAX UNITS ● ● ● 1.7 3.8 3.5 3.0 7.5 6.6 mV mV mV ● ● ● 1.7 3.8 3.5 3.2 7.7 6.7 mV mV mV 620234fa 8 LT6202/LT6203/LT6204 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over –40°C < TA < 85°C temperature range. VS = ±5V; VCM = VOUT = 0V, unless otherwise noted. (Note 5) SYMBOL PARAMETER CONDITIONS TYP MAX UNITS VOS TC Input Offset Voltage Drift (Note 9) VCM = Half Supply ● 7.5 24 µV/°C Input Offset Voltage Match (Channel-to-Channel) (Note 6) VCM = 0V VCM = V – to V+ ● ● 0.3 0.6 1.0 2.5 mV mV Input Bias Current VCM = Half Supply VCM = V+ VCM = V – ● ● ● –1.4 1.8 –4.5 3.6 µA µA µA IB ∆IB IB Shift VCM = V – to V+ IB Match (Channel-to-Channel) (Note 6) MIN –7.0 –10 ● 5.4 13 µA ● 0.15 0.7 µA 0.15 0.3 0.5 1 1.2 1.6 µA µA µA IOS Input Offset Current VCM = Half Supply VCM = V+ VCM = V – ● ● ● AVOL Large Signal Gain VO = ±4.5V, RL = 1k VO = ±1.5V RL = 100 ● ● 60 6.0 110 13 V/mV V/mV CMRR Common Mode Rejection Ratio VCM = V – to V+ VCM = –2V to 2V ● ● 65 80 84 95 dB dB CMRR Match (Channel-to-Channel) (Note 6) VCM = –2V to 2V ● 80 110 dB Power Supply Rejection Ratio VS = ±1.5V to ±5V ● 60 70 dB 70 100 PSRR PSRR Match (Channel-to-Channel) (Note 6) VS = ±1.5V to ±5V ● VOL Output Voltage Swing LOW Saturation (Note 8) No Load ISINK = 5mA ISINK = 15mA ● ● ● 7 98 260 75 205 500 mV mV mV VOH Output Voltage Swing HIGH Saturation (Note 8) No Load ISOURCE = 5mA ISOURCE = 15mA ● ● ● 70 130 360 130 250 640 mV mV mV ISC Short-Circuit Current ● IS Supply Current per Amp ● ±15 dB ±25 3.8 mA 4.5 mA GBW Gain Bandwidth Product Frequency = 1MHz ● 90 MHz SR Slew Rate AV = –1, RL = 1k, VO = 4V ● 13 18 V/µs FPBW Full Power Bandwidth (Note 10) VOUT = 3VP-P ● 1.4 1.9 MHz Note 1: Absolute maximum ratings are those values beyond which the life of the device may be impaired. Note 2: Inputs are protected by back-to-back diodes and diodes to each supply. If the inputs are taken beyond the supplies or 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: The LT6202C/LT6202I, LT6203C/LT6203I and LT6204C/LT6204I are guaranteed functional over the temperature range of –40°C and 85°C. Note 5: The LT6202C/LT6203C/LT6204C are guaranteed to meet specified performance from 0°C to 70°C. The LT6202C/LT6203C/LT6204C 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 LT6202I/LT6203I/LT6204I are guaranteed to meet specified performance from –40°C to 85°C. Note 6: Matching parameters are the difference between the two amplifiers A and D and between B and C of the LT6204; between the two amplifiers of the LT6203. CMRR and PSRR match are defined as follows: CMRR and PSRR are measured in µV/V on the identical amplifiers. The difference is calculated between the matching sides in µV/V. The result is converted to dB. Note 7: Minimum supply voltage is guaranteed by power supply rejection ratio test. Note 8: Output voltage swings are measured between the output and power supply rails. Note 9: This parameter is not 100% tested. Note 10: Full-power bandwidth is calculated from the slew rate: FPBW = SR/2πVP Note 11: Differential gain and phase are measured using a Tektronix TSG120YC/NTSC signal generator and a Tektronix 1780R Video Measurement Set. The resolution of this equipment is 0.1% and 0.1°. Ten identical amplifier stages were cascaded giving an effective resolution of 0.01% and 0.01°. 620234fa 9 LT6202/LT6203/LT6204 U W TYPICAL PERFOR A CE CHARACTERISTICS VOS Distribution, VCM = V+/2 45 40 VOS Distribution, VCM = V+ 60 VS = 5V, 0V S8 VOS Distribution, VCM = V– 60 VS = 5V, 0V S8 50 VS = 5V, 0V S8 50 30 25 20 15 NUMBER OF UNITS NUMBER OF UNITS NUMBER OF UNITS 35 40 30 20 40 30 20 10 10 10 5 0 –250 –150 –50 0 50 150 INPUT OFFSET VOLTAGE (µV) LT6202/03/04 G01 Offset Voltage vs Input Common Mode Voltage 12 TA = 125°C 4 TA = –55°C 1.0 TA = 125°C 0.5 TA = 25°C 0 2 –0.5 0 –1.0 2 8 12 6 10 4 TOTAL SUPPLY VOLTAGE (V) 14 TA = –55°C 3 5 2 4 0 1 INPUT COMMON MODE VOLTAGE (V) –1 10 OUTPUT SATURATION VOLTAGE (V) 0 –1 –2 –3 VCM = 0V –4 –5 –6 –50 –35 –20 –5 10 25 40 55 TEMPERATURE (°C) 70 85 LT6202/03/04 G07 TA = –55°C –4 TA = 25°C TA = 125°C 6 –1 0 4 5 1 2 3 COMMON MODE VOLTAGE (V) Output Saturation Voltage vs Load Current (Output High) 10 VS = 5V, 0V 1 TA = 125°C 0.1 TA = 25°C 0.01 0.001 0.01 TA = –55°C 1 10 0.1 LOAD CURRENT (mA) 6 LT6202/03/04 G06 Output Saturation Voltage vs Load Current (Output Low) VS = 5V, 0V 1 –2 LT6202/03/04 G05 Input Bias Current vs Temperature VCM = 5V 0 –6 LT6202/03/04 G04 2 VS = 5V, 0V VS = 5V, 0V TYPICAL PART OUTPUT SATURATION VOLTAGE (V) TA = 25°C INPUT BIAS CURRENT (µA) OFFSET VOLTAGE (mV) SUPPLY CURRENT (mA) 6 2 1.5 8 0 INPUT BIAS CURRENT (µA) Input Bias Current vs Common Mode Voltage 2.0 10 3 LT6202/03/04 G03 LT6202/03/04 G02 Supply Current vs Supply Voltage (Both Amplifiers) 4 0 –800 –600 –400 –200 0 200 400 600 800 INPUT OFFSET VOLTAGE (µV) 0 –800–600 –400 –200 0 200 400 600 800 1000 INPUT OFFSET VOLTAGE (µV) 250 100 LT6202/03/04 G08 VS = 5V, 0V 1 TA = 125°C TA = 25°C 0.1 0.01 0.001 0.01 TA = –55°C 1 10 0.1 LOAD CURRENT (mA) 100 LT6202/03/04 G09 620234fa 10 LT6202/LT6203/LT6204 U W TYPICAL PERFOR A CE CHARACTERISTICS Output Short-Circuit Current vs Power Supply Voltage Minimum Supply Voltage 10 4 TA = 125°C 2 TA = 25°C 0 –2 –4 TA = –55°C –6 –8 1.5 2 2.5 3 3.5 4 4.5 TOTAL SUPPLY VOLTAGE (V) 1.5 40 TA = 25°C 20 TA = –55°C 0 SINKING TA = –55°C –20 TA = 25°C –40 –60 5 VS = 5V, 0V TA = 25°C 4 4.5 3.5 3 POWER SUPPLY VOLTAGE (±V) 0 15 VS = ±5V TA = 25°C RL = 1k –0.5 RL = 100Ω –1.0 1.0 0.5 RL = 100Ω –1.0 –1.5 –1.5 –2.0 –2.0 –2.5 RL = 1k 0 –0.5 1 2 3 OUTPUT VOLTAGE (V) 4 5 –5 –4 –3 –2 –1 0 1 2 3 OUTPUT VOLTAGE (V) LT6202/03/04 G13 100 TOTAL NOISE VOLTAGE (nV/√Hz) VS = ±5V 120 100 80 60 VS = ±2.5V 40 VS = ±1.5V 20 0 20 40 60 80 100 120 140 160 TIME AFTER POWER-UP (s) LT6202/03/04 G16 TA = 125°C 5 0 TA = 25°C –5 TA = –55°C 4 –15 20 40 –80 –60 –40 –20 0 OUTPUT CURRENT (mA) 5 VS = ±2.5V VCM = 0V f = 100kHz Input NoiseVoltage vs Frequency 45 TOTAL SPOT NOISE 40 10 AMPLIFIER SPOT NOISE VOLTAGE 1 RESISTOR SPOT NOISE 100k LT6202/03/04 G17 VS = 5V, 0V TA = 25°C PNP ACTIVE VCM = 0.5V 30 25 20 15 10 0 100 1k 10k TOTAL SOURCE RESISTANCE (Ω) NPN ACTIVE VCM = 4.5V 35 5 0.1 10 80 60 LT6202/03/04 G15 Total Noise vs Total Source Resistance TA = 25°C 140 VS = ±5V LT6202/03/04 G14 Warm-Up Drift vs Time (LT6203S8) 160 3.0 –10 –2.5 0 2.5 1.5 2.0 1.0 OUTPUT VOLTAGE (V) 10 OFFSET VOLTAGE (mV) 1.0 0.5 LT6202/03/04 G12 1.5 INPUT VOLTAGE (mV) INPUT VOLTAGE (mV) 5 Offset Voltage vs Output Current 2.0 0 RL = 100Ω Open-Loop Gain 1.5 CHANGE IN OFFSET VOLTAGE (µV) –0.5 –1.0 –1.5 2.5 2.5 0.5 RL = 1k 0 LT6202/03/04 G11 Open-Loop Gain 2.0 0.5 –2.5 2 LT6202/03/04 G10 2.5 1.0 –2.0 TA = 125°C –80 1.5 –10 1 60 VS = 3V, 0V TA = 25°C 2.0 TA = 125°C NOISE VOLTAGE (nV√Hz) CHANGE IN OFFSET VOLTAGE (mV) 6 2.5 SOURCING INPUT VOLTAGE (mV) OUTPUT SHORT-CIRCUIT CURRENT (mA) 80 8 0 Open-Loop Gain BOTH ACTIVE VCM = 2.5V 10 100 1k 10k FREQUENCY (Hz) 100k LT6202/03/04 G18 620234fa 11 LT6202/LT6203/LT6204 U W TYPICAL PERFOR A CE CHARACTERISTICS 12 BALANCED SOURCE RESISTANCE VS = 5V, 0V TA = 25°C 6 5 UNBALANCED NOISE CURRENT (pA/√Hz) PNP ACTIVE VCM = 0.5V 4 3 BOTH ACTIVE VCM = 2.5V 2 NPN ACTIVE VCM = 4.5V 1 1000 PNP ACTIVE VCM = 0.5V 8 6 BOTH ACTIVE VCM = 2.5V NPN ACTIVE VCM = 4.5V 4 2 1k 10k FREQUENCY (Hz) 100k 100 1k 10k FREQUENCY (Hz) LT6202/03/04 G19 70 PHASE MARGIN 100 TIME (2s/DIV) LT6202/03/04 G20 VS = 3V, 0V 80 70 100 70 80 60 60 50 PHASE VS = ±5V VS = 3V, 0V 50 40 40 30 20 CL = 5pF RL = 1k VCM = 0V –10 40 –55 –20 100k 10M 100M FREQUENCY (Hz) 70 80 60 60 50 80 PHASE MARGIN (DEG) 70 SLEW RATE (V/µs) PHASE MARGIN 100 0 20 GAIN VCM = 4.5V VS = 5V, 0V –10 CL = 5pF RL = 1k –20 1M 100k –40 –60 40 VS = ±5V 30 FALLING 20 –80 1G 10M 100M FREQUENCY (Hz) VS = 5V, 0V RISING VS = ±2.5V 50 –20 Output Impedance vs Frequency 1000 AV = –1 RF = RG = 1k RL = 1k 0 VCM = 0.5V LT6202/03/04 G23 Slew Rate vs Temperature 90 60 40 LT6202/03/04 G22 Gain Bandwidth and Phase Margin vs Supply Voltage 80 VCM = 0.5V 20 –40 1G 100 VCM = 4.5V 30 10 –80 1M 120 PHASE 40 –20 –60 LT6202/03/04 G21 GAIN BANDWIDTH 0 VS = 3V, 0V 60 125 VS = ±5V GAIN 20 0 100 Open-Loop Gain vs Frequency 120 10 GAIN BANDWIDTH 120 100k PHASE (DEG) VS = ±5V TA = 25°C RL = 1k CL = 5pF –800 VS = ±2.5V VS = ±5V 100 AV = 10 10 AV = 2 1 0.1 AV = 1 10 60 40 0 2 10 12 8 6 TOTAL SUPPLY VOLTAGE (V) 4 14 LT6202/03/04 G24 0 –55 –25 50 25 75 0 TEMPERATURE (°C) 100 125 LT6202/03/04 G25 0.01 100k 1M 10M FREQUENCY (Hz) 100M LT6202/03/04 G26 620234fa 12 PHASE (DEG) 60 VS = 3V, 0V 0 25 75 50 TEMPERATURE (°C) –400 80 60 GAIN (dB) 80 PHASE MARGIN (DEG) VS = ±5V –25 0 Open-Loop Gain vs Frequency 90 80 400 LT6202/03/04 G19.1 Gain Bandwidth and Phase Margin vs Temperature 120 800 – 1200 10 GAIN (dB) 100 VS = 5V, 0V VCM = VS/2 –1000 0 10 GAIN BANDWITH (MHz) 1200 UNBALANCED SOURCE RESISTANCE VS = 5V, 0V TA = 25°C 10 0 GAIN BANDWITH (MHz) 0.1Hz to 10Hz Output Voltage Noise OUTPUT IMPEDANCE (Ω) BALANCED NOISE CURRENT (pA/√Hz) 7 Unbalanced Noise Current vs Frequency OUTPUT VOLTAGE (nV) Balanced Noise Current vs Frequency LT6202/LT6203/LT6204 U W TYPICAL PERFOR A CE CHARACTERISTICS Common Mode Rejection Ratio vs Frequency 80 –40 TA = 25°C AV = 1 VS = ±5V –50 100 COMMON MODE REJECTION RATIO (dB) VS = 5V, 0V VCM = VS/2 –60 VOLTAGE GAIN (dB) 80 60 40 –70 –80 –90 –100 20 –110 0 10k 100k 100M 1M 10M FREQUENCY (Hz) 1G 40 VS = 5V, 0V AV = 1 1 10 FREQUENCY (MHz) OVERSHOOT (%) OVERSHOOT (%) NEGATIVE SUPPLY 20 10 25 RS = 20Ω 15 10k 1k 100 100k 1M FREQUENCY (Hz) RS = 50Ω RL = 50Ω VS = ±5V AV = 1 TA = 25°C – 150 25 RS = 50Ω RL = 50Ω 15 VIN + VOUT 500Ω 1mV 1mV 100 50 10 10mV 10mV 5 0 0 10 100 CAPACITIVE LOAD (pF) 1000 0 100 CAPACITIVE LOAD (pF) 10 LT6202/03/04 G29 10 – VOUT + 100 1mV 50 1mV 10mV 10mV 0 –4 –3 –2 1 2 –1 0 OUTPUT STEP (V) 3 4 LT6202/03/04 G32 1 2 –1 0 OUTPUT STEP (V) 9 –50 AV = –1 7 6 5 3 VS = ±5V TA = 25°C HD2, HD3 < –40dBc 2 10k 4 AV = 1 VS = ±2.5V VOUT = 2V(P-P) 8 4 3 Distortion vs Frequency DISTORTION (dBc) VIN 150 –2 –40 AV = 2 500Ω 500Ω –3 LT6202/03/04 G31 Maximum Undistorted Output Signal vs Frequency OUTPUT VOLTAGE SWING (VP-P) VS = ±5V AV = –1 TA = 25°C –4 1000 LT6202/03/04 G30 Settling Time vs Output Step (Inverting) 200 100M Settling Time vs Output Step (Noninverting) RS = 20Ω 20 10M LT6202/03/04 G28 RS = 10Ω 30 RS = 10Ω 5 SETTLING TIME (ns) 30 200 VS = 5V, 0V AV = 2 35 10 POSITIVE SUPPLY 40 Series Output Resistor vs Capacitive Load 40 20 50 LT6202/03/04 G27.1 Series Output Resistor vs Capacitive Load 30 60 0 –120 0.1 LT6202/03/04 G27 35 VS = 5V, 0V TA = 25°C VCM = VS/2 70 SETTLING TIME (ns) COMMON MODE REJECTION RATIO (dB) 120 Power Supply Rejection Ratio vs Frequency Channel Separation vs Frequency 100k 1M FREQUENCY (Hz) –60 RL = 100Ω, 3RD RL = 100Ω, 2ND –70 –80 RL = 1k, 3RD –90 RL = 1k, 2ND 10M LT6202/03/04 G33 –100 10k 100k 1M FREQUENCY (Hz) 10M LT6202/03/04 G34 620234fa 13 LT6202/LT6203/LT6204 U W TYPICAL PERFOR A CE CHARACTERISTICS Distortion vs Frequency –30 –60 –40 DISTORTION (dBc) DISTORTION (dBc) AV = 1 VS = ±5V VOUT = 2V(P-P) RL = 100Ω, 3RD RL = 100Ω, 2ND –70 –80 –40 AV = 2 VS = ±2.5V VOUT = 2V(P-P) –50 –50 RL = 100Ω, 3RD RL = 100Ω, 2ND –60 –70 –80 100k 1M FREQUENCY (Hz) 10M –60 RL = 100Ω, 2ND –70 –80 –90 –90 RL = 1k, 3RD –100 10k AV = 2 RL = 100Ω, 3RD VS = ±5V VOUT = 2V(P-P) RL = 1k, 3RD RL = 1k, 2ND –90 DISTORTION (dBc) –40 –50 Distortion vs Frequency Distortion vs Frequency –100 10k RL = 1k, 2ND RL = 1k, 3RD RL = 1k, 2ND 100k 1M FREQUENCY (Hz) 10M –100 10k 100k 1M FREQUENCY (Hz) LT6202/03/04 G36 LT6202/03/04 G35 5V Large-Signal Response 10M LT6202/03/04 G37 5V Small-Signal Response 1V/DIV 50mV/DIV 5V 0V 0V 200ns/DIV VS = 5V, 0V AV = 1 RL = 1k 200ns/DIV VS = 5V, 0V AV = 1 RL = 1k LT6202/03/04 G38 ±5V Large-Signal Response LT6202/03/04 G39 Output-Overdrive Recovery VOUT VIN (2V/DIV) (1V/DIV) 2V/DIV 5V 0V –5V 0V 0V 200ns/DIV 200ns/DIV VS = ±5V AV = 1 RL = 1k LT6202/03/04 G40 VS = 5V, 0V AV = 2 LT6202/03/04 G41 620234fa 14 LT6202/LT6203/LT6204 U W U U APPLICATIO S I FOR ATIO Amplifier Characteristics Input bias current normally flows out of the + and – inputs. The magnitude of this current increases when the input common mode voltage is within 1.5V of the negative rail, and only Q1/Q4 are active. The polarity of this current reverses when the input common mode voltage is within 1.5V of the positive rail and only Q2/Q3 are active. Figure 1 shows a simplified schematic of the LT6202/ LT6203/LT6204, which has two input differential amplifiers in parallel that are biased on simultaneously when the common mode voltage is at least 1.5V from either rail. This topology allows the input stage to swing from the positive supply voltage to the negative supply voltage. As the common mode voltage swings beyond VCC – 1.5V, current source I1 saturates and current in Q1/Q4 is zero. Feedback is maintained through the Q2/Q3 differential amplifier, but with an input gm reduction of 1/2. A similar effect occurs with I2 when the common mode voltage swings within 1.5V of the negative rail. The effect of the gm reduction is a shift in the VOS as I1 or I2 saturate. The second stage is a folded cascode and current mirror that converts the input stage differential signals to a single ended output. Capacitor C1 reduces the unity cross frequency and improves the frequency stability without degrading the gain bandwidth of the amplifier. The differential drive generator supplies current to the output transistors that swing from rail-to-rail. V+ + R1 –V R2 I1 – VBIAS Q11 +V Q5 DESD1 Q6 DESD2 + Q2 D1 D2 +V Q3 Q1 C1 CM +V Q4 – DESD3 DESD4 –V DESD5 DIFFERENTIAL DRIVE GENERATOR Q9 DESD6 Q7 Q8 +V Q10 –V R3 R4 I2 R5 D3 V– 6203/04 F01 Figure 1. Simplified Schematic 620234fa 15 LT6202/LT6203/LT6204 U W U U APPLICATIO S I FOR ATIO Input Protection There are back-to-back diodes, D1 and D2, across the + and – inputs of these amplifiers to limit the differential input voltage to ±0.7V. The inputs of the LT6202/LT6203/ LT6304 do not have internal resistors in series with the input transistors. This technique is often used to protect the input devices from over voltage that causes excessive currents to flow. The addition of these resistors would significantly degrade the low noise voltage of these amplifiers. For instance, a 100Ω resistor in series with each input would generate 1.8nV/√Hz of noise, and the total amplifier noise voltage would rise from 1.9nV/√Hz to 2.6nV/√Hz. Once the input differential voltage exceeds ±0.7V, steady state current conducted though the protection diodes should be limited to ±40mA. This implies 25Ω of protection resistance per volt of continuous overdrive beyond ±0.7V. The input diodes are rugged enough to handle transient currents due to amplifier slew rate overdrive or momentary clipping without these resistors. Figure 2 shows the input and output waveforms of the amplifier driven into clipping while connected in a gain of AV = 1. When the input signal goes sufficiently beyond the power supply rails, the input transistors will saturate. When saturation occurs, the amplifier loses a stage of phase inversion and the output tries to change states. Diodes D1 and D2 forward bias and hold the output within a diode drop of the input signal. In this photo, the input signal generator is clipping at ±35mA, and the output transistors supply this generator current through the protection diodes. With the amplifier connected in a gain of AV ≥ 2, the output can invert with very heavy input overdrive. To avoid this inversion, limit the input overdrive to 0.5V beyond the power supply rails. ESD The LT6202/LT6203/LT6204 have reverse-biased ESD protection diodes on all inputs and outputs as shown in Figure 1. If these pins are forced beyond either supply, unlimited current will flow through these diodes. If the current is transient and limited to one hundred milliamps or less, no damage to the device will occur. Noise The noise voltage of the LT6202/LT6203/LT6204 is equivalent to that of a 225Ω resistor, and for the lowest possible noise it is desirable to keep the source and feedback resistance at or below this value, i.e. RS + RG||RFB ≤ 225Ω. With RS + RG||RFB = 225Ω the total noise of the amplifier is: en = √(1.9nV)2 + (1.9nV)2 = 2.7nV. Below this resistance value, the amplifier dominates the noise, but in the resistance region between 225Ω and approximately 10kΩ, the noise is dominated by the resistor thermal noise. As the total resistance is further increased, beyond 10k, the noise current multiplied by the total resistance eventually dominates the noise. The product of en • √ISUPPLY is an interesting way to gauge low noise amplifiers. Many low noise amplifiers with low en have high ISUPPLY current. In applications that require low noise with the lowest possible supply current, this product can prove to be enlightening. The LT6202/LT6203/ LT6204 have an en, √ISUPPLY product of 3.2 per amplifier, yet it is common to see amplifiers with similar noise specifications have an en • √ISUPPLY product of 4.7 to 13.5. OV LT6202/03/04 F02 Figure 2. VS = ±2.5V, AV = 1 with Large Overdrive For a complete discussion of amplifier noise, see the LT1028 data sheet. 620234fa 16 LT6202/LT6203/LT6204 U TYPICAL APPLICATIO S Low Noise, Low Power 1MΩ AC Photodiode Transimpedance Amplifier Figure 3 shows the LT6202 applied as a transimpedance amplifier (TIA). The LT6202 forces the BF862 ultralownoise JFET source to 0V, with R3 ensuring that the JFET has an IDRAIN of 1mA. The JFET acts as a source follower, buffering the input of the LT6202 and making it suitable for the high impedance feedback elements R1 and R2. The BF862 has a minimum IDSS of 10mA and a pinchoff voltage between –0.3V and –1.2V. The JFET gate and the LT6202 VS+ R1 499k R2 499k – C1 1pF Precision Low Noise, Low Power, 1MΩ Photodiode Transimpedance Amplifier PHILIPS BF862 VBIAS– + output therefore sit at a point slightly higher than one pinchoff voltage below ground (typically about –0.6V). When the photodiode is illuminated, the current must come from the LT6202’s output through R1 and R2, as in a normal TIA. Amplifier input noise density and gainbandwidth product were measured at 2.4nV/Hz and 100MHz, respectively. Note that because the JFET has a high gm, approximately 1/80Ω, its attenuation looking into R3 is only about 2%. Gain-bandwidth product was measured at 100MHz and the closed-loop bandwidth using a 3pF photodiode was approximately 1.4MHz. LT6202 Figure 4 shows the LT6202 applied as a transimpedance amplifier (TIA), very similar to that shown in Figure 3. In this case, however, the JFET is not allowed to dictate the DC-bias conditions. Rather than being grounded, the LT6202’s noninverting input is driven by the LTC2050 to the exact state necessary for zero JFET gate voltage. The noise performance is nearly identical to that of the circuit in Figure 3, with the additional benefit of excellent DC performance. Input offset was measured at under 200µV and output noise was within 2mVP-P over a 20MHz bandwidth. VOUT R3 4.99k VS = ±5V VS– LT6202/03/04 F03 Figure 3. Low Noise, Low Power 1MΩ AC Photodiode Transimpedance Amplifier VS+ C1 1pF – VBIAS– – R5 10k + LTC2050HV + R2 499k PHILIPS BF862 C2 0.1µF R4 10M R1 499k C3 1µF LT6202 VOUT R3 4.99k VS = ±5V VS– LT6202/03/04 F04 Figure 4. Precision Low Noise, Low Power Transimpedance Amplifier 620234fa 17 LT6202/LT6203/LT6204 U TYPICAL APPLICATIO S Single-Supply 16-Bit ADC Driver Figure 5 shows the LT6203 driving an LTC1864 unipolar 16-bit A/D converter. The bottom half of the LT6203 is in a gain-of-one configuration and buffers the 0V negative full-scale signal VLOW into the negative input of the LTC1864. The top half of the LT6203 is in a gain-of-ten configuration referenced to the buffered voltage VLOW and drives the positive input of the LTC1864. The input range of the LTC1864 is 0V to 5V, but for best results the input range of VIN should be from VLOW (about 0.4V) to about 0.82V. Figure 6 shows an FFT obtained with a 10.1318kHz coherent input waveform, from 8192 samples with no windowing or averaging. Spurious free dynamic range is seen to be about 100dB. VIN = 0.6VDC ±200mVAC Although the LTC1864 has a sample rate far below the gain bandwidth of the LT6203, using this amplifier is not necessarily a case of overkill. The designer is reminded that A/D converters have sample apertures that are vanishingly small (ideally, infinitesimally small) and make demands on the upstream circuitry far in excess of what is implied by the innocent-looking sample rate. In addition, when an A/D converter takes a sample, it applies a small capacitor to its inputs with a fair amount of glitch energy and expects the voltage on the capacitor to settle to the true value very quickly. Finally, the LTC1864 has a 20MHz analog input bandwidth and can be used in undersampling applications, again requiring a source bandwidth higher than Nyquist. 5V R3 100Ω + 1/2 LT6203 – R1 1k + C1 470pF VLOW = 0.4VDC R2 110Ω + – LTC1864 16-BIT 250ksps SERIAL DATA OUT R4 100Ω 1/2 LT6203 – LT6202/03/04 F05 SFDR (dB) Figure 5. Single-Supply 16-Bit ADC Driver 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 –110 –120 –130 –140 –150 fS = 250ksps fIN = 10.131836kHz 0 12.5 25 37.5 50 62.5 75 82.5 100 112.5 125 FREQUENCY (kHz) LT6202/03/04 F06 Figure 6. FFT Showing 100dB SFDR 620234fa 18 LT6202/LT6203/LT6204 U PACKAGE DESCRIPTIO DD Package 8-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG # 05-08-1698) R = 0.115 TYP 5 0.38 ± 0.10 8 0.675 ±0.05 3.5 ±0.05 1.65 ±0.05 2.15 ±0.05 (2 SIDES) 3.00 ±0.10 (4 SIDES) PACKAGE OUTLINE 1.65 ± 0.10 (2 SIDES) PIN 1 TOP MARK (DD8) DFN 0203 0.28 ± 0.05 4 0.28 ± 0.05 0.75 ±0.05 0.200 REF 0.50 BSC 2.38 ±0.05 (2 SIDES) 1 0.50 BSC 2.38 ±0.10 (2 SIDES) 0.00 – 0.05 BOTTOM VIEW—EXPOSED PAD RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1) 2. ALL DIMENSIONS ARE IN MILLIMETERS 3. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 4. EXPOSED PAD SHALL BE SOLDER PLATED GN Package 16-Lead Plastic SSOP (Narrow .150 Inch) (Reference LTC DWG # 05-08-1641) .189 – .196* (4.801 – 4.978) .045 ±.005 16 15 14 13 12 11 10 9 .254 MIN .009 (0.229) REF .150 – .165 .229 – .244 (5.817 – 6.198) .0165 ± .0015 .150 – .157** (3.810 – 3.988) .0250 TYP RECOMMENDED SOLDER PAD LAYOUT 1 .015 ± .004 × 45° (0.38 ± 0.10) .007 – .0098 (0.178 – 0.249) .053 – .068 (1.351 – 1.727) 2 3 4 5 6 7 8 .004 – .0098 (0.102 – 0.249) 0° – 8° TYP .016 – .050 (0.406 – 1.270) NOTE: 1. CONTROLLING DIMENSION: INCHES INCHES 2. DIMENSIONS ARE IN (MILLIMETERS) 3. DRAWING NOT TO SCALE *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 .008 – .012 (0.203 – 0.305) .0250 (0.635) BSC GN16 (SSOP) 0502 620234fa 19 LT6202/LT6203/LT6204 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 7 6 5 0.52 (.206) REF 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 0.53 ± 0.015 (.021 ± .006) DETAIL “A” 1 2 3 4 1.10 (.043) MAX 0.86 (.034) REF 0.18 (.077) SEATING PLANE 0.22 – 0.38 (.009 – .015) TYP 0.65 (.0256) BSC 0.13 ± 0.076 (.005 ± .003) 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 620234fa 20 LT6202/LT6203/LT6204 U PACKAGE DESCRIPTIO 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 .245 MIN 7 6 5 .160 ±.005 .150 – .157 (3.810 – 3.988) NOTE 3 .228 – .244 (5.791 – 6.197) .030 ±.005 TYP 1 RECOMMENDED SOLDER PAD LAYOUT .010 – .020 × 45° (0.254 – 0.508) .008 – .010 (0.203 – 0.254) 0°– 8° TYP .016 – .050 (0.406 – 1.270) NOTE: 1. DIMENSIONS IN .053 – .069 (1.346 – 1.752) .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) 2 3 4 .004 – .010 (0.101 – 0.254) .050 (1.270) BSC SO8 0303 620234fa 21 LT6202/LT6203/LT6204 U PACKAGE DESCRIPTIO 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 .053 – .069 (1.346 – 1.752) NOTE: 1. DIMENSIONS IN .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) 7 .004 – .010 (0.101 – 0.254) 0° – 8° TYP .016 – .050 (0.406 – 1.270) 6 .050 (1.270) BSC S14 0502 620234fa 22 LT6202/LT6203/LT6204 U PACKAGE DESCRIPTIO S5 Package 5-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1635) 0.62 MAX 0.95 REF 2.90 BSC (NOTE 4) 1.22 REF 1.4 MIN 3.85 MAX 2.62 REF 2.80 BSC 1.50 – 1.75 (NOTE 4) PIN ONE RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.30 – 0.45 TYP 5 PLCS (NOTE 3) 0.95 BSC 0.80 – 0.90 0.20 BSC 0.01 – 0.10 1.00 MAX DATUM ‘A’ 0.30 – 0.50 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. JEDEC PACKAGE REFERENCE IS MO-193 1.90 BSC S5 TSOT-23 0302 620234fa 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. 23 LT6202/LT6203/LT6204 U TYPICAL APPLICATIO Low Noise Differential Amplifier with Gain Adjust and Common Mode Control C3 5pF C1 270pF R1 402Ω 0dB VIN– R2 200Ω R7, 402Ω 6dB R10, 402Ω + V R3 100Ω – 12dB R4 402Ω R9 402Ω – 1/2 LT6203 + 0dB VIN+ C2 22pF VOUT+ V+ R5 200Ω 6dB 1/2 LT6203 RA + RB R6 100Ω VOUT– 0.1µF R8 402Ω OUTPUT VCM = 12dB ( ) RB V+ RA + R B LT6202/03/04 F07 RELATIVE DIFFERENTIAL GAIN (1dB/DIV) Low Noise Differential Amplifier Frequency Response G = 0dB G = 6dB G = 12dB 50k 1M FREQUENCY (Hz) 5M LT6202/03/04 F08 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1028 Single, Ultralow Noise 50MHz Op Amp 1.1nV/√Hz LT1677 Single, Low Noise Rail-to-Rail Amplifier 3V Operation, 2.5mA, 4.5nV/√Hz, 60µV Max V0S LT1722/LT1723/LT1724 Single/Dual/Quad Low Noise Precision Op Amps 70V/µs Slew Rate, 400µV Max VOS, 3.8nV/√Hz, 3.7mA LT1800/LT1801/LT1802 Single/Dual/Quad Low Power 80MHz Rail-to-Rail Op Amps 8.5nV/√Hz, 2mA Max Supply LT1806/LT1807 Single/Dual, Low Noise 325MHz Rail-to-Rail Amplifiers 2.5V Operation, 550µV Max VOS, 3.5nV/√Hz LT6200 Single Ultralow Noise Rail-to-Rail Amplifier 0.95nV/√Hz, 165MHz Gain Bandwidth 620234fa 24 Linear Technology Corporation LT/TP 0403 1K • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2002