PDF MAX4166EUA Data sheet ( Hoja de datos )

Número de pieza	MAX4166EUA
Descripción	High-Output-Drive / Precision / Low-Power / Single- Supply / Rail-to-Rail I/O Op Amps with Shutdown
Fabricantes	Maxim Integrated
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No Preview Available ! 19-1224; Rev 1; 10/97 High-Output-Drive, Precision, Low-Power, Single- Supply, Rail-to-Rail I/O Op Amps with Shutdown General Description The MAX4165–MAX4169 family of operational ampli- fiers combines excellent DC accuracy with high output current drive, single-supply operation, and Rail-to-Rail® inputs and outputs. These devices operate from a sin- gle +2.7V to +6.5V supply, or from dual ±1.35V to ±3.25V supplies. They typically draw 1.2mA supply current, and are guaranteed to deliver 80mA output current. The MAX4166/MAX4168 have a shutdown mode that reduces supply current to 38µA per amplifier and places the outputs into a high-impedance state. The MAX4165–MAX4169’s precision performance com- bined with high output current, wide input/output dynamic range, single-supply operation, and low power consumption makes them ideal for portable audio applications and other low-voltage, battery-powered systems. The MAX4165 is available in the space-saving 5-pin SOT23 package. Selector Guide PART MAX4165 MAX4166 MAX4167 MAX4168 MAX4169 AMPS PER PACKAGE Single Single Dual Dual Quad SHUTDOWN MODE — Yes — Yes — ________________________Applications Portable/Battery-Powered Audio Applications Portable Head-Phone Speaker Drivers Laptop/Notebook Computers Sound Ports/Cards Set-Top Boxes Cell Phones Hands-Free Car Phones (kits) Signal Conditioning Digital-to-Analog Converter Buffers Transformer/Line Drivers Motor Drivers Typical Operating Circuit appears at end of data sheet. Rail-to-Rail is a registered trademark of Nippon Motorola Ltd. ____________________________Features o 80mA (min) Output Drive Capability o Rail-to-Rail Input Common-Mode Voltage Range o Rail-to-Rail Output Voltage Swing o 1.2mA Supply Current per Amplifier o +2.7V to +6.5V Single-Supply Operation o 5MHz Gain-Bandwidth Product o 250µV Offset Voltage o 120dB Voltage Gain (RL = 100kΩ) o 88dB Power-Supply Rejection Ratio o No Phase Reversal for Overdriven Inputs o Unity-Gain Stable for Capacitive Loads to 250pF o Low-Power Shutdown Mode: Reduces Supply Current to 38µA Places Outputs in High-Impedance State o Available in 5-Pin SOT23 Package (MAX4165) Ordering Information PART TEMP. RANGE PIN- PACKAGE SOT TOP MARK MAX4165EUK-T MAX4166EPA MAX4166ESA MAX4166EUA -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C 5 SOT23-5 8 Plastic DIP 8 SO 8 µMAX AABY — — — Ordering Information continued at end of data sheet. Pin Configurations TOP VIEW OUT 1 5 VCC MAX4165 VEE 2 IN+ 3 4 IN- SOT23-5 Pin Configurations continued at end of data sheet. ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800 For small orders, phone 408-737-7600 ext. 3468. 1 page High-Output-Drive, Precision, Low-Power, Single- Supply, Rail-to-Rail I/O Op Amps with Shutdown __________________________________________Typical Operating Characteristics (VCC = +5.0V, VEE = 0V, RL = 100kΩ, TA = +25°C, unless otherwise noted.) GAIN AND PHASE vs. FREQUENCY 70 MAX4165-01 216 60 AVCL = +1000V/V 180 50 144 40 108 30 72 20 36 10 0 0 -36 -10 -72 -20 -108 -30 100 1k 10k 100k 1M FREQUENCY (Hz) -144 10M OUTPUT IMPEDANCE vs. FREQUENCY 1000 100 10 1 0.1 1 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) GAIN AND PHASE vs. FREQUENCY (CL = 250pF) 70 MAX4165-02 216 60 AVCL = +1000V/V CL = 250pF 180 50 144 40 108 30 72 20 36 10 0 0 -36 -10 -72 -20 -108 -30 100 1k 10k 100k 1M FREQUENCY (Hz) -144 10M SUPPLY CURRENT PER AMPLIFIER vs. TEMPERATURE 1.6 VCC = +6.5V 1.4 1.2 1.0 VCC = +2.7V 0.8 0.6 0.4 0.2 0 -40 -20 0 20 40 60 TEMPERATURE (°C) 80 100 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY 10 0 AVCL = +1 -10 -20 -30 -40 -50 -60 -70 -80 -90 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) SHUTDOWN SUPPLY CURRENT PER AMPLIFIER vs. TEMPERATURE 80 70 VCC = +6.5V 60 50 40 30 VCC = +2.7V 20 10 0 -40 -20 0 20 40 60 TEMPERATURE (°C) 80 100 INPUT BIAS CURRENT vs. COMMON-MODE VOLTAGE 80 60 VCC = +2.7V 40 VCC = +6.5V 20 0 -20 -40 -60 0 12345 6 COMMON-MODE VOLTAGE (V) 7 INPUT BIAS CURRENT vs. TEMPERATURE 80 60 40 VCC = +2.7V, VCM = VCC 20 VCC = +6.5V, VCM = VCC 0 VCC = +2.7V, VCM = VEE -20 VCC = +6.5V, VCM = VEE -40 -60 -40 -20 0 20 40 60 TEMPERATURE (°C) 80 100 2.25 1.75 1.25 0.75 0.25 -0.25 -0.75 -1.25 -1.75 -2.25 -40 INPUT OFFSET VOLTAGE vs. TEMPERATURE SOT23-5 PACKAGE SO PACKAGE -20 0 20 40 60 TEMPERATURE (°C) 80 _______________________________________________________________________________________ 5 5 Page High-Output-Drive, Precision, Low-Power, Single- Supply, Rail-to-Rail I/O Op Amps with Shutdown 1k 1k Figure 6. Input Protection Circuit Since the input stage switches between the NPN and PNP pairs, the input bias current changes polarity as the input voltage passes through the transition region. Match the effective impedance seen by each input to reduce the offset error caused by input bias currents flowing through external source impedances (Figures 4 and 5). High source impedances, together with input capaci- tance, can create a parasitic pole that produces an underdamped signal response. Reducing the input impedance or placing a small (2pF to 10pF) capacitor across the feedback resistor improves response. The MAX4165–MAX4169’s inputs are protected from large differential input voltages by 1kΩ series resistors and back-to-back triple diodes across the inputs (Figure 6). For differential voltages less than 1.8V, input resistance is typically 500kΩ. For differential input voltages greater than 1.8V, input resistance is approximately 2kΩ. The input bias current is given by the following equation: IBIAS = (VDIFF - 1.8V) / 2kΩ Rail-to-Rail Output Stage The minimum output is within millivolts of ground for single-supply operation, where the load is referenced to ground (VEE). Figure 7 shows the input voltage range and the output voltage swing of a MAX4165 connected as a voltage follower. The maximum output voltage swing is load dependent; however, it is guaranteed to be within 430mV of the positive rail (VCC = 5V) even with maximum load (25Ω to ground). VCC = +3.0V RL = 100kΩ IN (1V/div) OUT (1V/div) TIME (5µs/div) Figure 7. Rail-to-Rail Input/Output Range Driving Capacitive Loads The MAX4165–MAX4169 have a high tolerance for capacitive loads. They are stable with capacitive loads up to 250pF. Figure 8 is a graph of the stable operating region for various capacitive loads vs. resistive loads. Figures 9 and 10 show the transient response with excessive capacitive loads (1500pF), with and without the addition of an isolation resistor in series with the output. Figure 11 shows a typical noninverting capaci- tive-load-driving circuit in the unity-gain configuration. The resistor improves the circuit’s phase margin by iso- lating the load capacitor from the op amp’s output. ______________________________________________________________________________________ 11 11 Page

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