LM321-TR

LM321/358/324 1MHZ High Voltage Bipolar Opamp Features Small Package: • Single-Supply Operation from +3V ~ +32V • • Dual-Supply Operation from LM321 Available in SOT23-5 Packages • Gain-Bandwidth Product: 1MHz (Typ.) LM358 Available in SOP-8 and MSOP-8 Packages • Low Input Bias Current: 45nA (Typ.) LM324 Available in SOP-14 Package • Low Offset Voltage: 5mV (Max.) • Quiescent Current: 250µA per Amplifier (Typ.) • Operating Temperature: -25°C ~ +80°C ±1.5V ~ ±16V General Description The LM358 family have a high gain-bandwidth product of 1MHz, a slew rate of 0.4V/ 250 μs, and a quiescent current of μA/amplifier at 5V. The LM358 family is designed to provide optimal performance in low voltage and low noise systems. The maximum input offset voltage is 5mV for LM358 family. The operating range is from 3V to 32V. The LM321 single is available in Green SOT-23-5 packages. The LM358 Dual is available in Green SOP-8 and MSOP-8 packages. The LM324 Quad is available in Green SOP-14 package. Applications • Walkie-Talkie • Multivibrators • Battery Management Solution • Oscillators • Transducer Amplifiers • Portable Systems • Summing Amplifiers Pin Configuration Figure 1. Pin Assignment Diagram V1 1/13 LM321/358/324 Absolute Maximum Ratings Condition Symbol Max Vcc ±16V or 32V VI(DIFF) 32V VI -0.3V~32V Operating Temperature Range Topr -25°C ~+80°C Storage Temperature Range Tstg -65°C ~+150°C Power Supply Voltage Differential input voltage Input Voltage Note: Stress greater than those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions outside those indicated in the operational sections of this specification are not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. Package/Ordering Information PACKAGE PACKAGE MARKING DESCRIPTION OPTION INFORMATION LM321-TR SOT23-5 Tape and Reel,3000 LM321 LM358-SR SOP-8 Tape and Reel,4000 LM358 LM358-MR MSOP-8 Tape and Reel,3000 LM358 LM324-SR SOP-14 Tape and Reel,2500 LM324 MODEL CHANNEL ORDER NUMBER LM321 Single LM358 Dual LM324 Quad V1 2/13 LM321/358/324 Electrical Characteristics o (At VS = +15V, TA=25 C, unless otherwise noted.) LM321/358/324 PARAMETER SYMBOL CONDITIONS TYP +25 ℃ MIN/MAX OVER TEMPERATURE +25 ℃ UNITS MIN/MAX mV MAX INPUT CHARACTERISTICS Input Offset Voltage VOS VCM = VS/2 0.4 5 Input Bias Current IB 44 nA TYP Input Offset Current IOS 3 nA TYP Common-Mode Voltage Range VCM -0.1 to +4 V TYP Common-Mode Rejection Ratio CMRR Open-Loop Voltage Gain AOL Input Offset Voltage Drift ∆VOS/∆T VS = 5.5V VCM = 0V to Vs-1.5V 90 70 dB MIN RL = 5kΩ, VO = 1V to 11V 100 90 dB MIN ℃ 7 µV/ TYP V MIN OUTPUT CHARACTERISTICS VOH RL = 2kΩ 11 VOL RL = 2kΩ 5 20 mV MAX VOH RL = 10kΩ 12 13 V MIN VOL RL = 10kΩ 5 20 mV MAX 40 60 mA MAX 40 60 3 V MIN 32 V MAX 100 75 dB MIN 400 µA MAX Output Voltage Swing from Rail ISOURCE Output Current RL = 10Ω to VS/2 ISINK POWER SUPPLY Operating Voltage Range Power Supply Rejection Ratio PSRR VS = +5V to +30V, VCM = +0.5V Quiescent Current / Amplifier IQ 250 GBP 1 MHz TYP 0.4 V/µs TYP DYNAMIC PERFORMANCE Gain-Bandwidth Product Slew Rate V1 SR G = +1, 2V Output Step 3/13 LM321/358/324 Typical Performance characteristics V1 4/13 LM321/358/324 Typical Performance characteristics V1 5/13 LM321/358/324 Application Note Size LM358 family series op amps are unity-gain stable and suitable for a wide range of general-purpose applications. The small footprints of the LM358 family packages save space on printed circuit boards and enable the design of smaller electronic products. Power Supply Bypassing and Board Layout LM358 family series operates from a single 3V to 32V supply or dual ±1.5V to ±16V supplies. For best performance, a 0.1µF ceramic capacitor should be placed close to the VDD pin in single supply operation. For dual supply operation, both VDD and VSS supplies should be bypassed to ground with separate 0.1µF ceramic capacitors. Low Supply Current The low supply current (typical 250uA per channel) of LM358 family will help to maximize battery life. Operating Voltage LM358 family operates under wide input supply voltage (3V to 32V). In addition, all temperature specifications apply from o o -25 C to +80 C. Most behavior remains unchanged throughout the full operating voltage range. These guarantees ensure operation throughout the single Li-Ion battery lifetime Capacitive Load Tolerance The LM358 family is optimized for bandwidth and speed, not for driving capacitive loads. Output capacitance will create a pole in the amplifier’s feedback path, leading to excessive peaking and potential oscillation. If dealing with load capacitance is a requirement of the application, the two strategies to consider are (1) using a small resistor in series with the amplifier’s output and the load capacitance and (2) reducing the bandwidth of the amplifier’s feedback loop by increasing the overall noise gain. Figure 2. shows a unity gain follower using the series resistor strategy. The resistor isolates the output from the capacitance and, more importantly, creates a zero in the feedback path that compensates for the pole created by the output capacitance. Figure 2. Indirectly Driving a Capacitive Load Using Isolation Resistor The bigger the RISO resistor value, the more stable VOUT will be. However, if there is a resistive load RL in parallel with the capacitive load, a voltage divider (proportional to RISO/RL) is formed, this will result in a gain error. The circuit in Figure 3 is an improvement to the one in Figure 2. RF provides the DC accuracy by feed-forward the VIN to RL. CF and RISO serve to counteract the loss of phase margin by feeding the high frequency component of the output signal back to the amplifier’s inverting input, thereby preserving the phase margin in the overall feedback loop. Capacitive drive can be increased by increasing the value of CF. This in turn will slow down the pulse response. V1 6/13 LM321/358/324 Figure 3. Indirectly Driving a Capacitive Load with DC Accuracy V1 7/13 LM321/358/324 Typical Application Circuits Differential amplifier The differential amplifier allows the subtraction of two input voltages or cancellation of a signal common the two inputs. It is useful as a computational amplifier in making a differential to single-end conversion or in rejecting a common mode signal. Figure 4. shown the differential amplifier using LM358 family. Figure 4. Differential Amplifier VOUT= ( RR13++RR24 ) RR14 VIN − RR12 VIP +( RR13++RR24 ) RR13 VREF If the resistor ratios are equal (i.e. R1=R3 and R2=R4), then VOUT = R2 R1 (VIP − VIN ) + VREF Low Pass Active Filter The low pass active filter is shown in Figure 5. The DC gain is defined by –R2/R1. The filter has a -20dB/decade roll-off after its corner frequency ƒC=1/(2πR3C1). Figure 5. Low Pass Active Filter V1 8/13 LM321/358/324 Instrumentation Amplifier The triple LM358 family can be used to build a three-op-amp instrumentation amplifier as shown in Figure 6. The amplifier in Figure 6 is a high input impedance differential amplifier with gain of R2/R1. The two differential voltage followers assure the high input impedance of the amplifier. Figure 6. Instrument Amplifier . V1 9/13 LM321/358/324 Package Information SOP-8 V1 10/13 LM321/358/324 MSOP-8 V1 11/13 LM321/358/324 SOP-14 V1 12/13 LM321/358/324 SOT23-5 V1 13/13