Low drop dual power operational amplifiers
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)
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
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
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+
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
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 |
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 |
On double layer PCB with 4 cm2 copper dissipating area
Referred to pins 4, 5, 12 and 13.
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
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 |
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
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
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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