TSV621 Rail-to-rail input/output 29 µA 420 kHz CMOS operational amplifiers Features ■ Low supply voltage: 1.5 V–5.5 V ■ Rail-to-rail input and output ■ Low input offset voltage: 800 µV max (A version) ■ Low power consumption: 29 µA typ ■ Gain bandwidth product: 420 kHz typ ■ Unity gain stability ■ Micropackages: SC70-5, SOT23-5 ■ Low input bias current: 1 pA typ ■ Extended temperature range: -40 to +125° C ■ 4 kV HBM Applications ■ Battery-powered applications ■ Portable devices ■ Signal conditioning ■ Active filtering ■ Medical instrumentation 5 VCC In+ 1 VDD 2 In- 3 + _ 4 Out TSV621ICT/ILT SC70-5/SOT23-5 This operational amplifier is unity gain stable for capacitive loads up to 100 pF. The device is internally adjusted to provide very narrow dispersion of AC and DC parameters, especially power consumption, product gain bandwidth and slew rate. The TSV621 presents a high tolerance to ESD, sustaining 4 kV for the human body model. Additionally, the TSV621 is offered in SC70-5 and SOT23-5 micropackages, with extended temperature ranges from -40° C to +125° C. All these features make the TSV621 ideal for sensor interfaces, battery-supplied and portable applications, as well as active filtering. Description The TSV621 is a single operational amplifier offering low voltage, low power operation and railto-rail input and output. With a very low input bias current and low offset voltage (800 µV maximum for the A version), the TSV621 is ideal for applications that require precision. The device can operate at a power supply ranging from 1.5 to 5.5 V, and therefore suits battery-powered devices and extends battery life. This product features an excellent speed/power consumption ratio, offering a 420 kHz gain bandwidth while consuming only 29 µA at a 5-V supply voltage. January 2009 Rev 1 1/18 www.st.com 18 Absolute maximum ratings and operating conditions 1 TSV621 Absolute maximum ratings and operating conditions Table 1. Absolute maximum ratings (AMR) Symbol VCC Vid Vin Iin Tstg Parameter (1) Supply voltage Differential input voltage (2) Tj 6 V ±VCC V Input voltage VDD-0.2 to VCC+0.2 V Input current (4) 10 mA -65 to +150 °C SC70-5 205 °C/W SOT23-5 250 Storage temperature (5)(6) Maximum junction temperature HBM: human body ESD Unit (3) Thermal resistance junction to ambient Rthja Value MM: machine model(7) model(8) CDM: charged device model(9) Latch-up immunity 150 °C 4 kV 300 V 1.5 kV 200 mA 1. All voltage values, except differential voltage are with respect to network ground terminal. 2. Differential voltages are the non-inverting input terminal with respect to the inverting input terminal. 3. Vcc-Vin must not exceed 6 V. 4. Input current must be limited by a resistor in series with the inputs. 5. Short-circuits can cause excessive heating and destructive dissipation. 6. Rth are typical values. 7. Human body model: 100 pF discharged through a 1.5 kΩ resistor between two pins of the device, done for all couples of pin combinations with other pins floating. 8. Machine mode: a 200 pF capacitor is charged to the specified voltage, then discharged directly between two pins of the device with no external series resistor (internal resistor < 5 Ω), done for all couples of pin combinations with other pins floating. 9. Charged device model: all pins plus package are charged together to the specified voltage and then discharged directly to the ground. Table 2. Operating conditions Symbol 2/18 Parameter VCC Supply voltage Vicm Common mode input voltage range Toper Operating free air temperature range Value Unit 1.5 to 5.5 V VDD -0.1 to VCC +0.1 V -40 to +125 °C TSV621 Electrical characteristics 2 Electrical characteristics Table 3. Electrical characteristics at VCC = +1.8 V with VDD = 0 V, Vicm = VCC/2, Tamb = 25° C, and RL connected to VCC/2 (unless otherwise specified) Symbol Parameter Conditions Min. Typ. Max. Unit DC performance Vio DVio Offset voltage Input offset current (Vout = VCC/2) Iib Input bias current (Vout = VCC/2) Common mode rejection ratio 20 log (ΔVic/ΔVio) Avd Large signal voltage gain VOH High level output voltage VOL Low level output voltage Tmin < Top < Tmax TSV621 TSV621A 6 2.8 mV Iout Isource Supply current (per operator) μV/°C 2 (1) 1 10 1 100 1 10(1) 1 100 pA Tmin < Top < Tmax pA Tmin < Top < Tmax 0 V to 1.8 V, Vout = 0.9 V 53 Tmin < Top < Tmax 51 RL= 10 kΩ, Vout= 0.5 V to 1.3 V 78 Tmin < Top < Tmax 73 RL = 10 kΩ 35 Tmin < Top < Tmax 50 74 dB 95 dB 5 mV RL = 10 kΩ 4 35 mV Tmin < Top < Tmax Isink ICC 4 0.8 Input offset voltage drift Iio CMR TSV621 TSV621A 50 Vo = 1.8 V 6 Tmin < Top < Tmax 4 Vo = 0 V 6 Tmin < Top < Tmax 4 12 mA 10 mA No load, Vout = VCC/2 25 Tmin < Top < Tmax 31 µA 33 AC performance Gain bandwidth product RL = 10 kΩ, CL = 100 pF, f = 100 kHz Fu Unity gain frequency φm GBP 275 340 kHz RL = 10 kΩ, CL = 100 pF 280 kHz Phase margin RL = 10 kΩ, CL = 100 pF 45 Degrees Gm Gain margin RL = 10 kΩ, CL = 100 pF 9 dB SR Slew rate RL = 10 kΩ, CL = 100 pF, Av = 1 0.084 0.11 0.14 V/μs 1. Guaranteed by design. 3/18 Electrical characteristics Table 4. TSV621 VCC = +3.3 V, VDD = 0 V, Vicm = VCC/2, Tamb = 25° C, RL connected to VCC/2 (unless otherwise specified) Symbol Parameter Min. Typ. Max. Unit DC performance TSV621 TSV621A Vio DVio Offset voltage CMR 6 2.8 μV/°C 2 Input offset current 1 10(1) pA 1 100 pA 1 10(1) pA 1 100 pA Tmin < Top < Tmax Input bias current Tmin < Top < Tmax Common mode rejection ratio 20 log (ΔVic/ΔVio) Avd Large signal voltage gain VOH High level output voltage VOL Low level output voltage 0 V to 3.3 V, Vout = 1.75 V 57 Tmin < Top < Tmax 53 RL=10 kΩ, Vout = 0.5 V to 2.8 V 81 Tmin < Top < Tmax 76 RL = 10 kΩ 35 Tmin < Top < Tmax 50 79 Iout Isource Supply current (per operator) dB dB 98 dB dB 5 mV RL = 10 kΩ 4 35 mV Tmin < Top < Tmax Isink ICC mV Tmin < Top < Tmax TSV621 TSV621A Input offset voltage drift Iio Iib 4 0.8 50 Vo = 5 V 30 Tmin < Top < Tmax 25 Vo = 0 V 30 Tmin < Top < Tmax 25 45 mA 38 mA No load, Vout = 2.5 V 26 Tmin < Top < Tmax 33 µA 35 µA AC performance Gain bandwidth product RL = 10 kΩ, CL = 100 pF, f = 100 kHz Fu Unity gain frequency φm 380 kHz RL = 10 kΩ, CL = 100 pF 310 kHz Phase margin RL = 10 kΩ, CL = 100 pF 45 Degrees Gm Gain margin RL = 10 kΩ, CL = 100 pF 9 dB SR Slew rate RL = 10 kΩ, CL = 100 pF, AV = 1 0.12 V/μs GBP 1. Guaranteed by design. 4/18 310 0.094 TSV621 Table 5. Electrical characteristics VCC = +5 V, VDD = 0 V, Vicm = VCC/2, Tamb = 25° C, RL connected to VCC/2 (unless otherwise specified) Symbol Parameter Min. Typ. Max. Unit DC performance Vio DVio Offset voltage Input offset current Iib Input bias current SVR Tmin < Top < Tmax TSV621 TSV621A 6 2.8 mV Tmin < Top < Tmax 0 V to 5 V, Vout = 2.5 V 60 Tmin < Top < Tmax 55 Supply voltage rejection ratio 20 VCC = 1.8 to 5 V log (ΔVCC/ΔVio) Tmin < Top < Tmax 75 Common mode rejection ratio 20 log (ΔVic/ΔVio) Large signal voltage gain VOH High level output voltage VOL Low level output voltage 1 10(1) pA 1 100 pA 1 10(1) pA 1 100 pA 80 dB 102 dB 98 dB 73 RL=10 kΩ, Vout = 0.5 V to 4.5 V 85 Tmin < Top < Tmax 80 RL = 10 kΩ 35 Tmin < Top < Tmax 50 7 mV RL = 10 kΩ 6 Iout Isource Supply current (per operator) 35 mV Tmin < Top < Tmax Isink μV/°C 2 Tmin < Top < Tmax Avd ICC 4 0.8 Input offset voltage drift Iio CMR TSV621 TSV621A 50 Vo = 5 V 40 69 Tmin < Top < Tmax 35 65 Vo = 0 V 40 74 Tmin < Top < Tmax 35 68 mA mA No load, Vout = 2.5 V 29 Tmin < Top < Tmax 36 µA 38 µA AC performance Gain bandwidth product RL = 10 kΩ, CL = 100 pF, f = 100 kHz Fu Unity gain frequency φm GBP 350 420 kHz RL = 10 kΩ, CL = 100 pF 360 kHz Phase margin RL = 10 kΩ, CL = 100 pF 45 Degrees Gm Gain margin RL = 10 kΩ, CL = 100 pF 9 dB SR Slew rate RL = 10 kΩ, CL = 100 pF, AV = 1 0.14 V/μs 0.108 5/18 Electrical characteristics Table 5. Symbol en THD VCC = +5 V, VDD = 0 V, Vicm = VCC/2, Tamb = 25° C, RL connected to VCC/2 (unless otherwise specified) (continued) Parameter Min. Equivalent input noise voltage f = 1 kHz Total harmonic distortion Av = 1, f = 1 kHz, RL= 100 kΩ, Vicm = Vcc/2, Vout = 2 Vpp 1. Guaranteed by design. 6/18 TSV621 Typ. Max. Unit 70 nV -----------Hz 0.004 % TSV621 Figure 1. Electrical characteristics Input offset voltage vs input common mode at VCC = 1.5 V Figure 2. Input offset voltage vs input common mode at VCC = 5 V 0.5 0.4 0.3 Input Offset Voltage (mV) 0.2 0.1 0.0 -0.1 -0.2 0.2 0.0 -0.2 -0.3 -0.4 -0.4 -0.5 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 Input Common Mode Voltage (V) 0.0 1.6 Figure 3. Supply current vs. supply voltage at Vicm = VCC/2 Figure 5. Output current vs. output voltage at Figure 6. VCC = 5 V Gain (dB) Figure 4. 1.0 2.0 3.0 4.0 Input Common Mode Voltage (V) 5.0 Output current vs. output voltage at VCC = 1.5 V Voltage gain and phase vs. frequency at Vcc = 1.5 V Phase (°) Input Offset Voltage (mV) 0.4 7/18 Electrical characteristics Figure 7. TSV621 Voltage gain and phase vs. frequency at VCC = 5 V Figure 8. Phase margin vs. output current at VCC = 1.5 V and VCC = 5 V 90 80 Vcc=5V 70 Phase (°) Gain (dB) 60 Vcc=1.5V 50 40 30 20 Vicm=Vcc/2, Cl=100pF Rl=4.7kohms, T=25 C 10 0 -1.5 Slew rate vs. supply voltage -0.5 0.0 0.5 1.0 1.5 Figure 10. Slew rate vs. supply voltage Slew rate (V/ s) Figure 9. -1.0 Supply voltage (V) 10µV/div Figure 11. Distortion + noise vs. output voltage Figure 12. Distortion + noise vs. frequency 1 Vcc=1.5V Rl=10kΩ THD + N (%) THD + N (%) Vcc=1.5V Rl=10kohms Vcc=1.5V Rl=100kohms f=1kHz Gain=1 BW=22kHz Vicm=Vcc/2 Vcc=1.5V Rl=100kΩ 0.1 Vcc=5.5V Rl=10kohms Vcc=5.5V Rl=100kohms Ω 0.01 Ω 10 Output Voltage (Vpp) 8/18 100 1000 10000 TSV621 Electrical characteristics Input equivalent noise density (nV/VHz) Figure 13. Noise vs. frequency Vicm=4.5V Vicm=2.5V Vcc=5V T=25 C Frequency (Hz) 9/18 Application information TSV621 3 Application information 3.1 Operating voltages The TSV621 can operate from 1.5 to 5.5 V. Its parameters are fully specified for 1.8-, 3.3and 5-V power supplies. However, the parameters are very stable in the full VCC range and several characterization curves show the TSV621 characteristics at 1.5 V. Additionally, the main specifications are guaranteed in extended temperature ranges from -40° C to +125° C. 3.2 Rail-to-rail input The TSV621 is built with two complementary PMOS and NMOS input differential pairs. The device has a rail-to-rail input, and the input common mode range is extended from VDD -0.1 V to VCC +0.1 V. The transition between the two pairs appear at VCC -0.7 V. In the transition region, the performance of CMRR, PSRR, Vio and THD is slightly degraded (as shown in Figure 14 and Figure 15 for Vio vs. Vicm). Figure 14. Input offset voltage vs input common mode at VCC = 1.5 V Figure 15. Input offset voltage vs input common mode at VCC = 5 V 0.5 0.4 0.3 Input Offset Voltage (mV) Input Offset Voltage (mV) 0.4 0.2 0.1 0.0 -0.1 -0.2 0.2 0.0 -0.2 -0.3 -0.4 -0.4 -0.5 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 Input Common Mode Voltage (V) 1.6 0.0 1.0 2.0 3.0 4.0 Input Common Mode Voltage (V) 5.0 The device is guaranteed without phase reversal. 3.3 Rail-to-rail output The operational amplifier’s output level can go close to the rails: 35 mV maximum above and below the rail when connected to a 10 kΩ resistive load to VCC/2. 10/18 TSV621 3.4 Application information Optimization of DC and AC parameters This device uses an innovative approach to reduce the spread of the main DC and AC parameters. An internal adjustment achieves a very narrow spread of current consumption (29 µA typical, min/max at ±17%). Parameters linked to the current consumption value, such as GBP, SR and AVd benefit from this narrow dispersion. All parts present a similar speed and the same behavior in terms of stability. In addition, the minimum values of GBP and SR are guaranteed (GBP = 350 kHz min, SR = 0.15 V/µs min). 3.5 Driving resistive and capacitive loads These products are micro-power, low-voltage operational amplifiers optimized to drive rather large resistive loads, above 5 kΩ. For lower resistive loads, the THD level may significantly increase. In a follower configuration, these operational amplifiers can drive capacitive loads up to 100 pF with no oscillations. When driving larger capacitive loads, adding a small in-series resistor at the output can improve the stability of the device (see Figure 16 for recommended in-series resistor values). Once the in-series resistor value has been selected, the stability of the circuit should be tested on bench and simulated with the simulation model. In-series resistor (Ω) Figure 16. In-series resistor vs. capacitive load 3.6 PCB layouts For correct operation, it is advised to add 10 nF decoupling capacitors as close as possible to the power supply pins. 11/18 Application information 3.7 TSV621 Macromodel An accurate macromodel of TSV621 is available on STMicroelectronics’ web site at www.st.com. This model is a trade-off between accuracy and complexity (that is, time simulation) of the TSV62x operational amplifiers. It emulates the nominal performances of a typical device within the specified operating conditions mentioned in the datasheet. It helps to validate a design approach and to select the right operational amplifier, but it does not replace on-board measurements. 12/18 TSV621 4 Package information Package information In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. 13/18 Package information 4.1 TSV621 SOT23-5 package mechanical data Figure 17. SOT23-5L package mechanical drawing Table 6. SOT23-5L package mechanical data Dimensions Ref. A Millimeters Min. Typ. Max. Min. Typ. Max. 0.90 1.20 1.45 0.035 0.047 0.057 A1 14/18 Inches 0.15 0.006 A2 0.90 1.05 1.30 0.035 0.041 0.051 B 0.35 0.40 0.50 0.013 0.015 0.019 C 0.09 0.15 0.20 0.003 0.006 0.008 D 2.80 2.90 3.00 0.110 0.114 0.118 D1 1.90 0.075 e 0.95 0.037 E 2.60 2.80 3.00 0.102 0.110 0.118 F 1.50 1.60 1.75 0.059 0.063 0.069 L 0.10 0.35 0.60 0.004 0.013 0.023 K 0° 10° TSV621 4.2 Package information SC70-5 (or SOT323-5) package mechanical data Figure 18. SC70-5 (or SOT323-5) package mechanical drawing SIDE VIEW DIMENSIONS IN MM GAUGE PLANE COPLANAR LEADS SEATING PLANE TOP VIEW Table 7. SC70-5 (or SOT323-5) package mechanical data Dimensions Ref Millimeters Min A Typ 0.80 A1 Inches Max Min 1.10 0.315 Typ 0.043 0.10 A2 0.80 b 0.90 Max 0.004 1.00 0.315 0.035 0.15 0.30 0.006 0.012 c 0.10 0.22 0.004 0.009 D 1.80 2.00 2.20 0.071 0.079 0.087 E 1.80 2.10 2.40 0.071 0.083 0.094 E1 1.15 1.25 1.35 0.045 0.049 0.053 e 0.65 0.025 e1 1.30 0.051 L 0.26 < 0° 0.36 0.46 0.010 0.014 0.039 0.018 8° 15/18 Ordering information 5 TSV621 Ordering information Table 8. Order codes Temperature range Package Packing Marking TSV621ILT -40°C to +125°C SOT23-5 Tape & reel K106 TSV621ICT -40°C to +125°C SC70-5 Tape & reel K16 Part number 16/18 TSV621 6 Revision history Revision history Table 9. Document revision history Date Revision 12-Jan-2009 1 Changes Initial release. 17/18 TSV621 Please Read Carefully: Information in this document is provided solely in connection with ST products. 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