Datasheet

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September 2010 Doc ID 13407 Rev 2 1/12

L2720W

Low drop dual power operational amplifiers

Features

 Output current up to 1 A

 Operates at low voltages

 Single or split supply

 Large common-mode and differential-mode

range

 Low input-offset voltage

 Ground compatible inputs

 Low saturation voltage

 Thermal shutdown

 Clamp diode

Description

The L2720W is a monolithic integrated circuit in

SO16 (Wide) package, intended for use as a

power operational amplifier in a wide range of

applications including servo amplifiers and power

supplies.

It is particularly suitable for driving coils, inductive

loads and for use in motors.

The high gain and high output power capability

provide superior performance whenever an

operational amplifier/power booster combination

is required.

SO16 (Wide)

Table 1. Device summary

Order code Package Packaging

L2720W SO16 (Wide) Tube

L2720W13TR SO16 (Wide) Tape and reel

www.st.com

Summary of content (12 pages)

PAGE 1
L2720W Low drop dual power operational amplifiers Features Output current up to 1 A Operates at low voltages Single or split supply Large common-mode and differential-mode range Low input-offset voltage Ground compatible inputs Low saturation voltage Thermal shutdown Clamp diode SO16 (Wide) Description The L2720W is a monolithic integrated circuit in SO16 (Wide) package, intended for use as a power operational amplifier in a wide range of applications including servo amp
PAGE 2
Connection diagrams 1 L2720W Connection diagrams Figure 1. Figure 2. Block diagram VS 1 OUTB 2 N.C. 3 VEE / GND 4 VEE / GND 5 N.C. 6 INB- 7 INB+ 8 16 OUTA 15 N.C. 14 N.C. 13 VEE / GND - + + - 12 VEE / GND 11 N.C.
PAGE 3
L2720W 2 Pin out Pin out Figure 3. Pin connection (top view) Table 2. VS 1 16 OUTA OUTB 2 15 N.C. N.C. 3 14 N.C. VEE / GND 4 13 VEE / GND VEE / GND 5 12 VEE / GND N.C. 6 11 N.C. INB- 7 10 INA- INB+ 8 9 INA+ Pin description Pin Name Type Description 1 VS Power Power supply positive 2 OUTB Output Amplifier B output 3 N.C.
PAGE 4
Electrical specifications L2720W 3 Electrical specifications 3.1 Absolute maximum ratings Table 3. Absolute maximum ratings Pin/symbol 3.2 Description Min Max Unit VS Supply voltage - 28 V VS-PK Peak supply voltage (50 ms) - 50 V Vi Input voltage range - Vs V Vi Differential input voltage range - ±Vs V IO DC output current - 1 A IO-PK Peak output current (non repetitive) - 1.
PAGE 5
L2720W 3.4 Electrical specifications Electrical characteristics The electrical specifications in Table 6 below are given for operation under the conditions VS = 24 V, Tamb = -40 °C to 125 °C and RI connected to GND, unless otherwise specified Table 6. Electrical characteristics Symbol Parameter Is Quiescent current Iib Input bias current Iob Input offset current Conditions Min Typ Max Tamb = 25 °C - 10 15 - - 10 18 Tamb = 25 °C - 0.2 1 - 0.
PAGE 6
Electrical specifications Table 6. L2720W Electrical characteristics (continued) Symbol Parameter Conditions Min Typ Max Unit IN Input noise current B = 22 Hz to 22 kHz, Tamb = 25 °C - 200 - pA φm Phase margin RL = 2 kΩ, CL = 100 pF, Tamb = 25 °C - 65 - °C Am Gain margin RL = 2 kΩ, CL = 100 pF, Tamb = 25 °C - 15 - dB 3.5 6/12 Characterization curves Figure 4. Quiescent current vs supply current Figure 5.
PAGE 7
L2720W Electrical specifications Figure 6. Common mode rejection vs frequency Figure 7. Output swing vs load current (Vs = ±5 V) Figure 8.
PAGE 8
Electrical specifications Figure 9. L2720W Supply voltage rejection vs frequency Figure 10. Channel separation vs frequency Figure 11. Voltage gain and phase vs frequency Fig.
PAGE 9
L2720W Electrical specifications Figure 12. Phase margin vs output load capacitance Phase margin (degrees) 70 60 50 Vs = ±12 V R1 = 2 KΩ 40 30 20 0 0.4 0.8 Doc ID 13407 Rev 2 1.2 1.
PAGE 10
Package mechanical data 4 L2720W Package mechanical data 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. Figure 13. SO16 (Wide) mechanical data and package dimensions mm inch DIM. MIN. TYP. MAX. MIN. TYP. MAX. A 2.35 - 2.65 0.093 - 0.104 A1 0.10 - 0.
PAGE 11
L2720W 5 Revision history Revision history Table 7. Document revision history Date Revision Changes 04-Apr-2007 1 Initial release.
PAGE 12
L2720W Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale.