OPA548 Texas instruments

OPA548

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OPA548

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Описание

The OPA548 device is a low-cost, high-voltage, and high-current operational amplifier that is designed to drive a wide variety of loads. A laser-trimmed, monolithic, integrated circuit provides excellent low-level signal accuracy and high-output voltage and current. The OPA548 operates from either single or dual supplies for design flexibility. In single-supply operation, the input common-mode range extends below ground. The OPA548 is internally protected against overtemperature conditions and current overloads. In addition, the OPA548 is designed to provide an accurate, user-selected current limit. Unlike other designs that use a power resistor in series with the output current path, the OPA548 senses the load indirectly. The current limit is adjustable from 0 A to 5 A with an external resistor and potentiometer, or controllable digitally with a voltage-out or current-out DAC. The Enable/Status (E/S) pin provides two functions. An input on the pin not only disables the output stage to effectively disconnect the load, but also reduces the quiescent current to conserve power. The E/S pin output can be monitored to determine if the OPA548 is in thermal shutdown. The OPA548 device is available in an industry-standard 7-lead staggered and straight lead TO-220 package, and a 7-lead DDPAK surface-mount plastic power package. The copper tab allows easy mounting to a heat sink or circuit board for excellent thermal performance. The device is specified for operation over the extended industrial temperature range, –40°C to 85°C. A SPICE macromodel is available for design analysis.

Wide supply range
- Single supply: 8 V to 60 V
- Dual supply: ±4 V to ±30 V
High-output current:
- 3-A continuous
- 5-A peak
Wide output voltage swing
Fully protected:
- Thermal shutdown
- Adjustable current limit
Output disable control˜
Thermal shutdown indicator
High slew rate: 10 V
Low quiescent current
Packages:
- 7-lead TO-220, zip and straight leads
- 7-lead DDPAK surface-mount

Number of channels	1
Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V)	8
Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V)	60
Iout (typ) (A)	3
GBW (typ) (MHz)	1
Slew rate (typ) (V/µs)	10
Vos (offset voltage at 25°C) (max) (mV)	10
Offset drift (typ) (V/°C)	0.00003
Iq per channel (typ) (mA)	17
Features	Adj Current Limit, Shutdown
Rating	Catalog
Operating temperature range (°C)	-40 to 85
Input bias current (max) (pA)	500000
CMRR (typ) (dB)	95
Rail-to-rail	In to V-
Architecture	Bipolar