NCS2001, NCV2001 0.9 V, Rail−to−Rail, Single Operational Amplifier The NCS2001 is an industry first sub−one voltage operational amplifier that features a rail−to−rail common mode input voltage range, along with rail−to−rail output drive capability. This amplifier is guaranteed to be fully operational down to 0.9 V, providing an ideal solution for powering applications from a single cell Nickel Cadmium (NiCd) or Nickel Metal Hydride (NiMH) battery. Additional features include no output phase reversal with overdriven inputs, trimmed input offset voltage of 0.5 mV, extremely low input bias current of 40 pA, and a unity gain bandwidth of 1.4 MHz at 5.0 V. The tiny NCS2001 is the ideal solution for small portable electronic applications and is available in the space saving SOT23−5 and SC70−5 packages with two industry standard pinouts. Features • 0.9 V Guaranteed Operation Rail−to−Rail Common Mode Input Voltage Range Rail−to−Rail Output Drive Capability No Output Phase Reversal for Over−Driven Input Signals 0.5 mV Trimmed Input Offset 10 pA Input Bias Current 1.4 MHz Unity Gain Bandwidth at "2.5 V, 1.1 MHz at "0.5 V Tiny SC70−5 and SOT23−5 Packages NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes Pb−Free Package is Available Typical Applications • • • • • • • • Single Cell NiCd/NiMH Battery Powered Applications Cellular Telephones Pagers Personal Digital Assistants Electronic Games Digital Cameras Camcorders Hand−Held Instruments MARKING DIAGRAMS 5 5 1 MBB AYWG G 1 SOT23−5 SN SUFFIX CASE 483 5 5 AAx AYWG G 1 NCV2001SN2 4 5 | M • • • • • • • • • http://onsemi.com 3 12 AAx 1 SC70−5 SQ SUFFIX CASE 419A x = G for SN1 H for SN2 I for SQ1 J for SQ2 A = Assembly Location Y = Year W = Work Week M = Date Code G = Pb−Free Package (Note: Microdot may be in either location) PIN CONNECTIONS VOUT 1 VCC Non−Inverting Input 2 3 + − 5 VEE 4 Inverting Input Style 1 Pinout (SN1T1, SQ1T2) Rail to Rail Input 0.8 V to 7.0 V Rail to Rail Output + − VOUT 1 VEE Non−Inverting Input 2 3 + − 5 VCC 4 Inverting Input Style 2 Pinout (SN2T1, SQ2T2) ORDERING INFORMATION This device contains 63 active transistors. See detailed ordering and shipping information in the dimensions section on page 15 of this data sheet. Figure 1. Typical Application © Semiconductor Components Industries, LLC, 2007 January, 2007 − Rev. 15 1 Publication Order Number: NCS2001/D NCS2001, NCV2001 MAXIMUM RATINGS Rating Symbol Value Unit VS 7.0 V Input Differential Voltage Range (Note 1) VIDR VEE −300 mV to 7.0 V V Input Common Mode Voltage Range (Note 1) VICR VEE −300 mV to 7.0 V V Output Short Circuit Duration (Note 2) tSc Indefinite sec Junction Temperature TJ 150 °C RqJA PD 235 340 °C/W mW RqJA PD 280 286 °C/W mW Supply Voltage (VCC to VEE) Power Dissipation and Thermal Characteristics SOT23−5 Package Thermal Resistance, Junction−to−Air Power Dissipation @ TA = 70°C SC70−5 Package Thermal Resistance, Junction−to−Air Power Dissipation @ TA = 70°C Operating Ambient Temperature Range NCS2001 NCV2001 (Note 3) TA Storage Temperature Range Tstg −65 to 150 °C VESD 2000 V ESD Protection at any Pin Human Body Model (Note 4) °C −40 to +105 −40 to +125 Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. 1. Either or both inputs should not exceed the range of VEE −300 mV to VEE +7.0 V. 2. Maximum package power dissipation limits must be observed to ensure that the maximum junction temperature is not exceeded. TJ = TA + (PD RqJA). 3. NCV prefix is qualified for automotive usage. 4. ESD data available upon request. DC ELECTRICAL CHARACTERISTICS (VCC = 2.5 V, VEE = −2.5 V, VCM = VO = 0 V, RL to GND, TA = 25°C unless otherwise noted.) Characteristics Symbol Input Offset Voltage VCC = 0.45 V, VEE = −0.45 V TA = 25°C TA = 0°C to 70°C TA = −40°C to 125°C VCC = 1.5 V, VEE = −1.5 V TA = 25°C TA = 0°C to 70°C TA = −40°C to 125°C VCC = 2.5 V, VEE = −2.5 V TA = 25°C TA = 0°C to 70°C TA = −40°C to 125°C Min Typ Max VIO Unit mV −6.0 −8.5 −9.5 0.5 − − 6.0 8.5 9.5 −6.0 −7.0 −7.5 0.5 − − 6.0 7.0 7.5 −6.0 −7.5 −7.5 0.5 − − 6.0 7.5 7.5 DVIO/DT − 8.0 − mV/°C IIB − 10 − pA Input Common Mode Voltage Range VICR − VEE to VCC − Large Signal Voltage Gain VCC = 0.45 V, VEE = −0.45 V RL = 10 k RL = 2.0 k VCC = 1.5 V, VEE = −1.5 V RL = 10 k RL = 2.0 k VCC = 2.5 V, VEE = −2.5 V RL = 10 k RL = 2.0 k AVOL Input Offset Voltage Temperature Coefficient (RS = 50) TA = −40°C to 125°C Input Bias Current (VCC = 1.0 V to 5.0 V) http://onsemi.com 2 V kV/V − − 40 20 − − − − 40 40 − − 20 15 40 40 − − NCS2001, NCV2001 DC ELECTRICAL CHARACTERISTICS (continued) (VCC = 2.5 V, VEE = −2.5 V, VCM = VO = 0 V, RL to GND, TA = 25°C unless otherwise noted.) Characteristics Symbol Output Voltage Swing, High State Output (VID = +0.5 V) VCC = 0.45 V, VEE = −0.45 V TA = 25°C RL = 10 k RL = 2.0 k TA = 0°C to 70°C RL = 10 k RL = 2.0 k TA = −40°C to 125°C RL = 10 k RL = 2.0 k VCC = 1.5 V, VEE = −1.5 V TA = 25°C RL = 10 k RL = 2.0 k TA = 0°C to 70°C RL = 10 k RL = 2.0 k TA = −40°C to 125°C RL = 10 k RL = 2.0 k VCC = 2.5 V, VEE = −2.5 V TA = 25°C RL = 10 k RL = 2.0 k TA = 0°C to 70°C RL = 10 k RL = 2.0 k TA = −40°C to 125°C RL = 10 k RL = 2.0 k VOH Output Voltage Swing, Low State Output (VID = −0.5 V) VCC = 0.45 V, VEE = −0.45 V TA = 25°C RL = 10 k RL = 2.0 k TA = 0°C to 70°C RL = 10 k RL = 2.0 k TA = −40°C to 125°C RL = 10 k RL = 2.0 k VCC = 1.5 V, VEE = −1.5 V TA = 25°C RL = 10 k RL = 2.0 k TA = 0°C to 70°C RL = 10 k RL = 2.0 k TA = −40°C to 125°C RL = 10 k RL = 2.0 k VCC = 2.5 V, VEE = −2.5 V TA = 25°C RL = 10 k RL = 2.0 k TA = 0°C to 70°C RL = 10 k RL = 2.0 k TA = −40°C to 125°C RL = 10 k RL = 2.0 k VOL Min 3 Max Unit V 0.40 0.35 0.494 0.466 − − 0.40 0.35 − − − − 0.40 0.35 − − − − 1.45 1.40 1.498 1.480 − − 1.45 1.40 − − − − 1.45 1.40 − − − − 2.45 2.40 2.498 2.475 − − 2.45 2.40 − − − − 2.45 2.40 − − − − V − − −0.494 −0.480 −0.40 −0.35 − − − − −0.40 −0.35 − − − − −0.40 −0.35 − − −1.493 −1.480 −1.45 −1.40 − − − − −1.45 −1.40 − − − − −1.45 −1.40 −2.492 −2.479 −2.45 −2.40 − − − − −2.45 −2.40 − − − − −2.45 −2.40 − − http://onsemi.com Typ NCS2001, NCV2001 DC ELECTRICAL CHARACTERISTICS (continued) (VCC = 2.5 V, VEE = −2.5 V, VCM = VO = 0 V, RL to GND, TA = 25°C unless otherwise noted.) Characteristics Symbol Min Typ Max Unit Common Mode Rejection Ratio (Vin = 0 to 5.0 V) CMRR 60 70 − dB Power Supply Rejection Ratio (VCC = 0.5 V to 2.5 V, VEE = −2.5 V) PSRR 55 65 − dB Output Short Circuit Current VCC = 0.45 V, VEE = −0.45 V, VID = "0.4 V Source Current High Output State Sink Current Low Output State VCC = 1.5 V, VEE = −1.5 V, VID = "0.5 V Source Current High Output State Sink Current Low Output State VCC = 2.5 V, VEE = −2.5 V, VID = "0.5 V Source Current High Output State Sink Current Low Output State ISC Power Supply Current (Per Amplifier, VO = 0 V) VCC = 0.45 V, VEE = −0.45 V TA = 25°C TA = 0°C to 70°C TA = −40°C to 125°C VCC = 1.5 V, VEE = −1.5 V TA = 25°C TA = 0°C to 70°C TA = −40°C to 125°C VCC = 2.5 V, VEE = −2.5 V TA = 25°C TA = 0°C to 70°C TA = −40°C to 125°C ID mA 0.5 − 1.2 −3.0 − −1.5 15 − 29 −40 − −20 40 − 76 −96 − −50 mA − − − 0.51 − − 1.10 1.10 1.10 − − − 0.72 − − 1.40 1.40 1.40 − − − 0.82 − − 1.50 1.50 1.50 AC ELECTRICAL CHARACTERISTICS (VCC = 2.5 V, VEE = −2.5 V, VCM = VO = 0 V, RL to GND, TA = 25°C unless otherwise noted.) Characteristics Symbol Min Typ Max Unit Differential Input Resistance (VCM = 0 V) Rin − u1.0 − tera W Differential Input Capacitance (VCM = 0 V) Cin − 3.0 − pF Equivalent Input Noise Voltage (f = 1.0 kHz) en − 100 − nV/√Hz − − 0.5 1.1 1.3 1.4 − − − Gain Bandwidth Product (f = 100 kHz) VCC = 0.45 V, VEE = −0.45 V VCC = 1.5 V, VEE = −1.5 V VCC = 2.5 V, VEE = −2.5 V GBW MHz Gain Margin (RL = 10 k, CL = 5.0 pf) Am − 6.5 − dB Phase Margin (RL = 10 k, CL = 5.0 pf) fm − 60 − ° Power Bandwidth (VO = 4.0 Vpp, RL = 2.0 k, THD = 1.0%, AV = 1.0) BWP − 80 − kHz Total Harmonic Distortion (VO = 4.0 Vpp, RL = 2.0 k, AV = 1.0) f = 1.0 kHz f = 10 kHz THD − − 0.008 0.08 − − 1.0 1.0 1.6 1.6 6.0 6.0 Slew Rate (VS = "2.5 V, VO = −2.0 V to 2.0 V, RL = 2.0 k, AV = 1.0) Positive Slope Negative Slope http://onsemi.com 4 % SR V/ms NCS2001, NCV2001 0 High State Output Sourcing Current −0.4 −0.3 0.6 Low State Output Sinking Current 0.2 0 VEE 100 1.0 k 10 k VCC = 2.5 V VEE = −2.5 V IL to GND TA = 25°C −0.2 −0.6 0.4 VCC −0.1 VCC = 2.5 V VEE = −2.5 V RL to GND TA = 25°C −0.2 100 k High State Output Sourcing Current Low State Output Sinking Current 0.3 0.2 0.1 0 1.0 M VEE 0 2.0 4.0 12 Figure 3. Split Supply Output Saturation vs. Load Current 80 45 60 0 10 VCC = 2.5 V VEE = −2.5 V 1.0 25 50 75 Gain 40 AVOL, Gain (dB) IIB, Input Current (pA) 10 Figure 2. Split Supply Output Saturation vs. Load Resistance 100 0 8.0 IL, Load Current (mA) 1000 0 6.0 RL, Load Resistance (W) Phase 20 −90 0 125 Phase Margin = 60° VCC = 2.5 V VEE = −2.5 V RL = 10 k to GND TA = 25°C −20 100 −40 −225 1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07 f, Frequency (Hz) Figure 4. Input Bias Current vs. Temperature Figure 5. Gain and Phase vs. Frequency 2V 0.2 V −2 V V+ 2 V/div V+ 0.1 V/div 0V 0.2 V 2V VOUT 2 V/div −2 V −135 −180 TA, Ambient Temperature (°C) −2 V −45 Fm, Excess Phase (°) VCC Vsat, Output Saturation Voltage (V) Vsat, Output Saturation Voltage (V) 0 −2 V VOUT 0.1 V/div 0V 1 ms/div) 1 ms/div) Figure 6. Transient Response Figure 7. Slew Rate http://onsemi.com 5 NCS2001, NCV2001 90 6 CMR, Common Mode Rejection (dB) VO, Output Voltage (Vpp) VS = ±2.5 V 5 AV = 1.0 RL = 10 k TA = 25°C 4 VS = ±1.5 V 3 2 VS = ±0.5 V 1 0 1.E+03 1.E+04 1.E+05 70 VCC = 2.5 V VEE = −2.5 V TA = 25°C 60 50 40 30 20 10 0 1.E+01 1.E+06 1.E+02 1.E+03 Figure 9. Common Mode Rejection vs. Frequency IISCI, Output Short Circuit Current (mA) PSR − VCC = 2.5 V VEE = −2.5 V TA = 25°C 60 50 40 30 20 10 PSR + 0 1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 PSR − 1.E+06 1.E+07 250 Output Pulsed Test at 3% Duty Cycle 200 1.E+07 −40°C 25°C 150 85°C 100 50 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 VS, Supply Voltage (V) f, Frequency (Hz) Figure 10. Power Supply Rejection vs. Frequency Figure 11. Output Short Circuit Sinking Current vs. Supply Voltage 1.0 Output Pulsed Test at 3% Duty Cycle 85°C −40°C 200 150 25°C 85°C 100 50 0.5 1.0 1.5 2.0 2.5 3.0 ID, Supply Current (mA) IISCI, Output Short Circuit Current (mA) 1.E+06 Figure 8. Output Voltage vs. Frequency 70 PSR + 0 0 1.E+05 f, Frequency (Hz) 80 250 1.E+04 f, Frequency (Hz) 90 PSR, Power Supply Rejection (dB) 80 0.8 25°C 0.6 −40°C 0.4 0.2 0.0 0.0 3.5 0.5 1.0 1.5 2.0 2.5 3.0 VS, Supply Voltage (V) VS, Supply Voltage (V) Figure 12. Output Short Circuit Sourcing Current vs. Supply Voltage Figure 13. Supply Current vs. Supply Voltage http://onsemi.com 6 3.5 NCS2001, NCV2001 10 0.1 AV = 1000 AV = 100 AV = 10 0.01 AV = 1.0 VS = ±0.5 V Vout = 0.4 Vpp 0.001 10 10 THD, Total Harmonic Distortion (%) THD, Total Harmonic Distortion (%) 1.0 1.0 100 1.0 k RL = 2.0 k TA = 25°C 10 k 1.0 0.1 0.01 0.001 10 100 k 100 RL = 10 k TA = 25°C Figure 15. Total Harmonic Distortion vs. Frequency with 1.0 V Supply 10 k 100 k 10 AV = 1000 AV = 100 AV = 1.0 VS = ±2.5 V Vout = 4.0 Vpp RL = 2.0 k TA = 25°C 100 1.0 k 10 k AV = 1000 1.0 AV = 100 AV = 1.0 0.1 0.01 10 100 k VS = ±2.5 V Vout = 4.0 Vpp RL = 10 k TA = 25°C AV = 10 100 1.0 k 10 k 100 k f, Frequency (Hz) f, Frequency (Hz) Figure 16. Total Harmonic Distortion vs. Frequency with 5.0 V Supply Figure 17. Total Harmonic Distortion vs. Frequency with 5.0 V Supply 1.3 GBW, Gain Bandwidth Product (MHz) 2.5 SR, Slew Rate (V/ms) VS = ±0.5 V Vout = 0.4 Vpp Figure 14. Total Harmonic Distortion vs. Frequency with 1.0 V Supply 0.01 10 +Slew Rate, VS = ±2.5 V −Slew Rate, VS = ±2.5 V 1.5 −Slew Rate, VS = ±0.45 V 1.0 0 −50 AV = 10 1.0 k f, Frequency (Hz) 0.1 0.5 AV = 100 f, Frequency (Hz) AV = 10 2.0 AV = 1000 AV = 1.0 THD, Total Harmonic Distortion (%) THD, Total Harmonic Distortion (%) 10 RL = 10 k CL = 10 pF TA = 25°C −25 +Slew Rate, VS = ±0.45 V 0 25 50 75 100 125 1.2 1.1 1.0 0.9 −50 VCC = 2.5 V VEE = −2.5 V RL = 10 k CL = 10 pF −25 0 25 50 75 100 TA, Ambient Temperature (°C) TA, Ambient Temperature (°C) Figure 18. Slew Rate vs. Temperature Figure 19. Gain Bandwidth Product vs. Temperature http://onsemi.com 7 125 NCS2001, NCV2001 0 −135 VS = ±2.5 V −20 −40 10 k −180 RL = 10 k TA = 25°C 100 k 1.0 M 20 Phase Margin 50 75 100 50 VCC = 2.5 V VEE = −2.5 V RL = 10 k CL = 10 pF TA = 25°C 40 30 Gain Margin 20 10 0 100 k 100 1.0 k 10 k Rt, Differential Source Resistance (W) 100 80 80 AV = 100 VCC = 2.5 V VEE = −2.5 V RL = 10 k to GND TA = 25°C 60 40 60 40 Gain Margin 20 0 1.0 20 0 1000 10 100 CL, Output Load Capacitance (pF) Figure 23. Gain and Phase Margin vs. Output Load Capacitance 100 Am, Gain Margin (dB) 6.0 4.0 RL = 10 k TA = 25°C Split Supplies 2.0 0.5 1.0 1.5 2.0 2.5 3.0 0 125 Phase Margin 60 8.0 VOUT, Output Volltage (Vpp) 25 100 70 Figure 22. Gain and Phase Margin vs. Differential Source Resistance 0 0 0 Figure 21. Gain and Phase Margin vs. Temperature 10 0 10 −25 20 Figure 20. Voltage Gain and Phase vs. Frequency Fm, Phase Margin (°) AV, Gain Margin (dB) 30 Gain Margin 20 TA, Ambient Temperature (°C) 60 40 40 f, Frequency (Hz) 70 50 VCC = 2.5 V 60 VEE = −2.5 V RL = 10 k 40 CL = 10 pF 60 0 −50 −225 100 M 10 M 80 Phase Margin Phase Margin 80 80 60 60 RL = 10 k CL = 10 pF TA = 25°C 40 40 Gain Margin 20 0 3.5 100 0 0.5 1.0 1.5 2.0 20 2.5 3.0 VS, Supply Voltage (V) VS, Supply Voltage (V) Figure 24. Output Voltage Swing vs. Supply Voltage Figure 25. Gain and Phase Margin vs. Supply Voltage http://onsemi.com 8 0 3.5 Fm, Phase Margin (°) 20 80 Fm, Phase Margin (°) VS = ±0.5 V Am, Gain Margin (dB) 40 Am, Gain Margin (dB) AVOL, Gain (dB) −90 Fm, Excess Phase (°) VS = ±2.5 V 60 100 100 −45 Fm, Phase Margin (°) 80 NCS2001, NCV2001 20 50 VIO, Input Offset Voltage (mV) AVOL, Open Loop Gain (dB) 60 RL = 10 k RL = 2.0 k 40 30 20 TA = 25°C 10 0 0.0 0.5 1.0 1.5 2.0 VS = ±2.5 V RL = ∞ CL = 0 AV = 1.0 TA = 25°C 15 10 5 0 −5 −10 −15 −20 −3.0 2.5 VIO, Input Offset Voltage (mV) 20 5 VS = ±2.5 V RL = ∞ CL = 0 AV = 1.0 TA = 25°C 0 −5 −10 −15 −20 −0.5 −0.4 −0.3 −0.2 −0.1 0 0.1 0.2 0 1.0 2.0 3.0 Figure 27. Input Offset Voltage vs. Common Mode Input Voltage Range VS = +2.5 V 0.3 0.4 0.5 VCM, Common Mode Input Voltage Range (V) Figure 26. Open Loop Voltage Gain vs. Supply Voltage 10 −1.0 VCM, Common Mode Input Voltage Range (V) VS, Supply Voltage (V) 15 −2.0 3.5 2.5 1.5 D Vio = 5.0 mV RL = ∞ CL = 0 AV = 1.0 TA = 25°C 0.5 −0.5 −1.5 −2.5 −3.5 0.0 VCM, Common Mode Input Voltage Range (V) 0.5 1.0 1.5 2.0 2.5 3.0 3.5 VS, Supply Voltage (V) Figure 28. Input Offset Voltage vs. Common Mode Input Voltage Range, VS = +0.45 V Figure 29. Common−Mode Input Voltage Range vs. Power Supply Voltage http://onsemi.com 9 NCS2001, NCV2001 APPLICATION INFORMATION AND OPERATING DESCRIPTION GENERAL INFORMATION The NCS2001 is an industry first rail−to−rail input, rail−to−rail output amplifier that features guaranteed sub−one voltage operation. This unique feature set is achieved with the use of a modified analog CMOS process that allows the implementation of depletion MOSFET devices. The amplifier has a 1.0 MHz gain bandwidth product, 2.2 V/ms slew rate and is operational over a power supply range less than 0.9 V to as high as 7.0 V. Cfb Rfb Input Cin − + Output Cin = Input and printed circuit board capacitance Figure 30. Input Capacitance Pole Cancellation Inputs The input topology chosen for this device series is unconventional when compared to most low voltage operational amplifiers. It consists of an N−Channel depletion mode differential transistor pair that drives a folded cascade stage and current mirror. This configuration extends the input common mode voltage range to encompass the VEE and VCC power supply rails, even when powered from a combined total of less than 0.9 V. Figures 27 and 28 show the input common mode voltage range versus power supply voltage. The differential input stage is laser trimmed in order to minimize offset voltage. The N−Channel depletion mode MOSFET input stage exhibits an extremely low input bias current of less than 10 pA. The input bias current versus temperature is shown in Figure 4. Either one or both inputs can be biased as low as VEE minus 300 mV to as high as 7.0 V without causing damage to the device. If the input common mode voltage range is exceeded, the output will not display a phase reversal. If the maximum input positive or negative voltage ratings are to be exceeded, a series resistor must be used to limit the input current to less than 2.0 mA. The ultra low input bias current of the NCS2001 allows the use of extremely high value source and feedback resistor without reducing the amplifier’s gain accuracy. These high value resistors, in conjunction with the device input and printed circuit board parasitic capacitances Cin, will add an additional pole to the single pole amplifier in Figure 30. If low enough in frequency, this additional pole can reduce the phase margin and significantly increase the output settling time. The effects of Cin, can be canceled by placing a zero into the feedback loop. This is accomplished with the addition of capacitor Cfb. An approximate value for Cfb can be calculated by: Cfb + Rin Output The output stage consists of complementary P and N−Channel devices connected to provide rail−to−rail output drive. With a 2.0 k load, the output can swing within 50 mV of either rail. It is also capable of supplying over 75 mA when powered from 5.0 V and 1.0 mA when powered from 0.9 V. When connected as a unity gain follower, the NCS2001 can directly drive capacitive loads in excess of 820 pF at room temperature without oscillating but with significantly reduced phase margin. The unity gain follower configuration exhibits the highest bandwidth and is most prone to oscillations when driving a high value capacitive load. The capacitive load in combination with the amplifier’s output impedance, creates a phase lag that can result in an under−damped pulse response or a continuous oscillation. Figure 32 shows the effect of driving a large capacitive load in a voltage follower type of setup. When driving capacitive loads exceeding 820 pF, it is recommended to place a low value isolation resistor between the output of the op amp and the load, as shown in Figure 31. The series resistor isolates the capacitive load from the output and enhances the phase margin. Refer to Figure 33. Larger values of R will result in a cleaner output waveform but excessively large values will degrade the large signal rise and fall time and reduce the output amplitude. Depending upon the capacitor characteristics, the isolation resistor value will typically be between 50 to 500 W. The output drive capability for resistive and capacitive loads is shown in Figures 2, 3, and 23. Input Rin Cin Rfb + − R Output CL Isolation resistor R = 50 to 500 Figure 31. Capacitance Load Isolation Note that the lowest phase margin is observed at cold temperature and low supply voltage. http://onsemi.com 10 NCS2001, NCV2001 Vin VS = ±0.45 V Vin = 0.8 Vpp R=0 CL = 820 pF AV = 1.0 TA = 25°C Vout Figure 32. Small Signal Transient Response with Large Capacitive Load Vin VS = ±0.45 V Vin = 0.8 Vpp R = 51 CL = 820 pF AV = 1.0 TA = 25°C Vout Figure 33. Small Signal Transient Response with Large Capacitive Load and Isolation Resistor http://onsemi.com 11 NCS2001, NCV2001 RT 470 k VCC Output Voltage 0 0.9 V CT 1.0 nF Timing Capacitor Voltage − fO = 1.5 kHz + 0.9 V The non−inverting input threshold levels are set so that the capacitor voltage oscillates between 1/3 and 2/3 of VCC. This requires the resistors R1a, R1b and R2 to be of equal value. The following formula can be used to approximate the output frequency. R1a 470 k R2 470 k R1b 470 k 0.67 VCC 0.33 VCC 1 f + O 1.39 R TC T Figure 34. 0.9 V Square Wave Oscillator cww 10 k D1 1N4148 10 k D2 1N4148 VCC Output Voltage 0 1.0 M Timing Capacitor Voltage 0.67 VCC 0.33 VCC cw Clock−wise, Low Duty Cycle VCC CT 1.0 nF VCC Output Voltage − fO + 0 Timing Capacitor Voltage R1a 470 k 0.67 VCC 0.33 VCC Counter−Clock−wise, High Duty Cycle VCC R1b 470 k R2 470 k The timing capacitor CT will charge through diode D2 and discharge through diode D1, allowing a variable duty cycle. The pulse width of the signal can be programmed by adjusting the value of the trimpot. The capacitor voltage will oscillate between 1/3 and 2/3 of VCC, since all the resistors at the non−inverting input are of equal value. Figure 35. Variable Duty Cycle Pulse Generator http://onsemi.com 12 NCS2001, NCV2001 R1 1.0 M 2.5 V R3 1.0 k + ≈ − Cin 10 mF 10,000 mF −2.5 V R Ceff. + 1 Cin R3 R2 1.0 M Figure 36. Positive Capacitance Multiplier Af Cf 400 pF Rf 100 k fL R2 10 k 0.5 V + Vin − C1 80 nF fH 1 f + [ 200 Hz L 2pR C 1 1 VO R1 10 k −0.5 V 1 f + [ 4.0 kHz H 2pRC f f R A + 1 ) f + 11 f R2 Figure 37. 1.0 V Voiceband Filter http://onsemi.com 13 NCS2001, NCV2001 Vsupply VCC Vin + I − V in + sink R sense Rsense Figure 38. High Compliance Current Sink Is VL Rsense RL R1 1.0 k 1.0 V R3 1.0 k R4 + − 1.0 k R5 VO 2.4 k 75 Is VO 435 mA 34.7 mV 212 mA 36.9 mV R6 For best performance, use low tolerance resistors. R2 3.3 k Figure 39. High Side Current Sense http://onsemi.com 14 NCS2001, NCV2001 ORDERING INFORMATION Device Package NCS2001SN1T1 SOT23−5 NCS2001SN1T1G SOT23−5 (Pb−Free) NCS2001SN2T1 SOT23−5 NCS2001SN2T1G SOT23−5 (Pb−Free) NCS2001SQ1T1G SC70−5 (Pb−Free) NCS2001SQ1T2 NCS2001SQ1T2G NCS2001SQ2T2 SC70−5 Shipping † 3000 / Tape & 7” Reel SC70−5 (Pb−Free) SC70−5 NCS2001SQ2T2G SC70−5 (Pb−Free) NCV2001SN2T1G* SOT23−5 (Pb−Free) †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. *NCV prefix denotes qualification status for automotive applications. Guaranteed by design. http://onsemi.com 15 NCS2001, NCV2001 PACKAGE DIMENSIONS TSOP−5 CASE 483−02 ISSUE F D 5X NOTE 5 2X 0.10 T 2X 0.20 T NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994. 2. CONTROLLING DIMENSION: MILLIMETERS. 3. MAXIMUM LEAD THICKNESS INCLUDES LEAD FINISH THICKNESS. MINIMUM LEAD THICKNESS IS THE MINIMUM THICKNESS OF BASE MATERIAL. 4. DIMENSIONS A AND B DO NOT INCLUDE MOLD FLASH, PROTRUSIONS, OR GATE BURRS. 5. OPTIONAL CONSTRUCTION: AN ADDITIONAL TRIMMED LEAD IS ALLOWED IN THIS LOCATION. TRIMMED LEAD NOT TO EXTEND MORE THAN 0.2 FROM BODY. 0.20 C A B 5 1 4 2 L 3 M B S K DETAIL Z G A DIM A B C D G H J K L M S DETAIL Z J C 0.05 SEATING PLANE H T MILLIMETERS MIN MAX 3.00 BSC 1.50 BSC 0.90 1.10 0.25 0.50 0.95 BSC 0.01 0.10 0.10 0.26 0.20 0.60 1.25 1.55 0_ 10 _ 2.50 3.00 SOLDERING FOOTPRINT* 0.95 0.037 1.9 0.074 2.4 0.094 1.0 0.039 0.7 0.028 SCALE 10:1 mm Ǔ ǒinches *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. http://onsemi.com 16 NCS2001, NCV2001 PACKAGE DIMENSIONS SC70−5 SQ SUFFIX CASE 419A−02 ISSUE J A NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. 419A−01 OBSOLETE. NEW STANDARD 419A−02. 4. DIMENSIONS A AND B DO NOT INCLUDE MOLD FLASH, PROTRUSIONS, OR GATE BURRS. G 5 4 −B− S 1 2 DIM A B C D G H J K N S 3 D 5 PL 0.2 (0.008) M B M N INCHES MIN MAX 0.071 0.087 0.045 0.053 0.031 0.043 0.004 0.012 0.026 BSC −−− 0.004 0.004 0.010 0.004 0.012 0.008 REF 0.079 0.087 MILLIMETERS MIN MAX 1.80 2.20 1.15 1.35 0.80 1.10 0.10 0.30 0.65 BSC −−− 0.10 0.10 0.25 0.10 0.30 0.20 REF 2.00 2.20 J C K H SOLDERING FOOTPRINT* 0.50 0.0197 0.65 0.025 0.65 0.025 0.40 0.0157 1.9 0.0748 SCALE 20:1 mm Ǔ ǒinches *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. 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This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada Email: [email protected] N. American Technical Support: 800−282−9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81−3−5773−3850 http://onsemi.com 17 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative NCS2001/D