L2720W


Low drop dual power operational amplifiers


Features



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 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.


Table 1. Device summary

Order code

Package

Packaging

L2720W

SO16 (Wide)

Tube

L2720W13TR

SO16 (Wide)

Tape and reel


September 2010 Doc ID 13407 Rev 2 1/12

www.st.com


  1. Connection diagrams


    Figure 1. Block diagram


    VS OUTB N.C.

    VEE / GND VEE / GND

    N.C. INB-

    INB+

    1

    2

    3

    4

    5

    6

    7

    8

    - + + -

    16 OUTA

    15 N.C.

    14 N.C.

    13 VEE / GND

    12 VEE / GND

    11 N.C.

    10 INA-

    9 INA+


    Figure 2. Schematic diagram (one amplifier)


    VS


    IN+

    Dump protection

    OUT


    10pF


    IN-


    Thermal protection


    VEE / GND


    S-9526


  2. Pin out


    Figure 3. Pin connection (top view)


    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.

    10 INA-

    9 INA+


    Table 2. Pin description

    Pin

    Name

    Type

    Description

    1

    VS

    Power

    Power supply positive

    2

    OUTB

    Output

    Amplifier B output

    3

    N.C.

    -

    No internal connection

    4

    VEE / GND

    Power

    Power supply negative or ground

    5

    VEE / GND

    Power

    Power supply negative or ground

    6

    N.C.

    -

    No internal connection

    7

    INB-

    Input

    Amplifier B input

    8

    INB+

    Input

    Amplifier B input

    9

    INA+

    Input

    Amplifier A input

    10

    INA-

    Input

    Amplifier A input

    11

    N.C.

    -

    No internal connection

    12

    VEE / GND

    Power

    Power supply negative or ground

    13

    VEE / GND

    Power

    Power supply negative or ground

    14

    N.C.

    -

    No internal connection

    15

    N.C.

    -

    No internal connection

    16

    OUTA

    Output

    Amplifier A output


    Doc ID 13407 Rev 2 3/12


  3. Electrical specifications


    1. Absolute maximum ratings


      Table 3. Absolute maximum ratings

      Pin/symbol

      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)

      -

      1.5

      A

      Top

      Operating ambient temperature range

      -40

      125

      °C

      Tstg, Tj

      Storage and junction temperature range

      -40

      150

      °C


    2. Thermal data


      Table 4. Thermal data

      Device

      Parameter

      Min

      Typ

      Max

      Unit

      Rth j-amb

      Thermal resistance junction to ambient (1)

      -

      65

      -

      °C/W

      Rth j-case

      Thermal resistance junction to case pins (2)

      -

      12

      -

      °C/W

      1. On double layer PCB with 4 cm2 copper dissipating area

      2. Referred to pins 4, 5, 12 and 13.


    3. Recommended operating conditions


      Table 5. Recommended operating conditions

      Symbol

      Parameter

      Min

      Typ

      Max

      Unit

      VS

      Positive single power supply

      4.0

      -

      28

      V

      Positive split power supply

      2.0

      -

      14

      V


      VE

      Negative single power supply

      -

      0

      -

      V

      Negative split power supply

      -2.0

      -

      -14

      V

      VIN

      Input voltage

      -

      -

      VS to VE

      V


      4/12 Doc ID 13407 Rev 2


    4. 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

      Conditions

      Min

      Typ

      Max

      Unit

      Is


      Quiescent current

      VO = VS / 2


      VCM = 0

      Tamb = 25 °C

      -

      10

      15


      mA

      -

      -

      10

      18


      Iib


      Input bias current

      Tamb = 25 °C

      -

      0.2

      1


      A

      -

      -

      0.2

      1


      Iob


      Input offset current


      VCM = 0

      Tamb = 25 °C

      -

      -

      100


      nA

      -

      -

      -

      100

      Vos


      Input offset voltage

      Tamb = 25 °C

      -10

      -

      10


      mV

      -

      -10

      -

      10

      Vos/T

      Average temperature coefficient of Vos

      -

      -

      20

      -

      V/° C


      SR


      Slew rate

      Vin = -10 V to +10 V,

      RL = 2 k CL = 100 pF, Av = -1,

      Tamb = 25 °C


      -


      2


      -


      V/s

      B

      Gain-bandwidth product

      -

      -

      1.2

      -

      MHz


      Gv


      Open loop voltage gain

      f = 100 Hz

      70

      80

      -


      dB

      f = 1 kHz

      -

      60

      -

      CMRR

      Common mode rejection ratio

      f = 1 kHz

      66

      84

      -

      dB


      SVRR


      Supply voltage rejection ratio

      f = 100 Hz RG = 10 k VR = 0.5 V

      Vs = 24 V

      -

      70

      -


      dB

      Vs = ±12 V

      60

      75

      -


      VDROP(H)


      Drop voltage high


      Ip = 100 mA

      Tamb = 25 °C

      -

      0.7

      1


      V

      -

      -

      0.8

      1.5


      Ip = 1 A

      Tamb = 25 °C

      -

      1.0

      1.5

      -

      -

      1.1

      1.5


      VDROP(L)


      Drop voltage low


      Ip = 100 mA

      Tamb = 25 °C

      -

      0.3

      0.7


      V

      -

      -

      0.4

      1


      Ip = 1 A

      Tamb = 25 °C

      -

      0.5

      1

      -

      -

      1.3

      1.5


      Cs


      Channel separation

      f = 1 kHz; RL = 10  Gv = 30 dB

      Vs = 24 V

      -

      60

      -


      dB

      Vs = 6 V

      -

      60

      -

      eN

      Input noise voltage

      B = 22 Hz to 22 kHz, Tamb = 25 °C

      -

      10

      -

      V


      Doc ID 13407 Rev 2 5/12


      Table 6. 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

      m

      Phase margin

      RL = 2 k CL = 100 pF,

      Tamb = 25 °C

      -

      65

      -

      °C

      Am

      Gain margin

      RL = 2 k CL = 100 pF,

      Tamb = 25 °C

      -

      15

      -

      dB


    5. Characterization curves

      Figure 4. Quiescent current vs supply current


      Figure 5. Open loop gain vs frequency


      6/12 Doc ID 13407 Rev 2


      Figure 6. Common mode rejection vs frequency


      Figure 7. Output swing vs load current (Vs = ±5 V)


      Figure 8. Output swing vs load current (Vs = ±12 V)



      Doc ID 13407 Rev 2 7/12


      Figure 9. Supply voltage rejection vs frequency


      Figure 10. Channel separation vs frequency


      Gv (dB) 80

      70

      60

      50

      40

      30

      20

      10

      0

      -10

      -20

      Figure 11. Voltage gain. and phase vs frequency

      -8800 Phase(°)


      Vs=24V

      Rl = 2 k?

      -9900


      1-100


      1-100


      1-12200


      1 10

      100

      f (KHz)

      1000

      1-13300

      10000


      8/12 Doc ID 13407 Rev 2


      30

      40

      Vs = ±12 V R1 = 2 K

      50

      60

      Phase margin (degrees)

      Figure 12. Phase margin vs output load capacitance


      70


      20


      0

      0.4

      0.8

      1.2

      1.6

      2



      Doc ID 13407 Rev 2 9/12


  4. 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.



    SO16 (Wide)

    OUTLINE AND MECHANICAL DATA

    Figure 13. SO16 (Wide) mechanical data and package dimensions




    DIM.

    mm

    inch

    MIN.

    TYP.

    MAX.

    MIN.

    TYP.

    MAX.

    A

    2.35

    -

    2.65

    0.093

    -

    0.104

    A1

    0.10

    -

    0.30

    0.004

    -

    0.012

    B

    0.33

    -

    0.51

    0.013

    -

    0.200

    C

    0.23

    -

    0.32

    0.009

    -

    0.013

    D (1)

    10.10

    -

    10.50

    0.398

    -

    0.413

    E

    7.40

    -

    7.60

    0.291

    -

    0.299

    e

    -

    1.27

    -

    -

    0.050

    -

    H

    10.0

    -

    10.65

    0.394

    -

    0.419

    h

    0.25

    -

    0.75

    0.010

    -

    0.030

    L

    0.40

    -

    1.27

    0.016

    -

    0.050

    k

    0° (min.), 8° (max.)

    ddd

    -

    -

    0.10

    -

    -

    0.004

    (1) “D” dimension does not include mold flash, protusions or gate burrs. Mold flash, protusions or gate burrs shall not exceed 0.15mm per side.



    0016021 C


    10/12 Doc ID 13407 Rev 2


  5. Revision history


Table 7. Document revision history

Date

Revision

Changes

04-Apr-2007

1

Initial release.

03-Sep-2010

2

Complete update and change in presentation


Doc ID 13407 Rev 2 11/12



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12/12 Doc ID 13407 Rev 2

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