Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsLinear ICsLinear IC - Op-amp Multi-purpose SOIC 8

Rev. 4

December 2005 1/15

LM2904

Low Power Dual Operational Amplifier

■ Internally frequency compensated

■ Large DC voltage gain: 100dB

■ Wide bandwidth (unity gain): 1.1MHz

(temperature compensated)

■ Very low supply current/op (500µA) essentially

independent of supply voltage

■ Low input bias current: 20nA (temperature

compensated)

■ Low input offset current: 2nA

■ Input common-mode voltage range includes

ground

■ Differential input voltage range equal to the

power supply voltage

■ Large output voltage swing 0V to (V

- 1.5V)

Description

This circuit consists of two independent, high

gain, internally frequency compensated which

were designed specifically for automotive and

industrial control system. It operates from a single

power supply over a wide range of voltages. The

low power supply drain is independent of the

magnitude of the power supply voltage.

Application areas include transducer amplifiers,

DC gain blocks and all the conventional op-amp

circuits which now can be more easily

implemented in single power supply systems. For

example, these circuits can be directly supplied

with off the standard +5V which is used in logic

systems and will easily provide the required

interface electronics without requiring any

additional power supply.

In the linear mode the input common-mode

voltage range includes ground and the output

voltage can also swing to ground, even though

operated from only a single power supply voltage.

DIP8

(Plastic Package)

SO-8

(Plastic Micropackage)

TSSOP8

(Thin Shrink Small Outline Package)

Mini SO-8

(Mini SO Package)

Pin connections (top view)

www.st.com

Summary of content (15 pages)

PAGE 1
LM2904 Low Power Dual Operational Amplifier ■ Internally frequency compensated ■ Large DC voltage gain: 100dB ■ Wide bandwidth (unity gain): 1.
PAGE 2
LM2904 Order Codes Part Number Temperature Range Package Packing Marking LM2904N DIP8 Tube LM2904N LM2904D/DT SO-8 Tube or Tape & Reel TSSOP8 (Thin Shrink Outline Package) Tape & Reel mini SO-8 Tape & Reel SO-8 (automotive grade level) Tube or Tape & Reel LM2904YPT TSSOP8 (automotive grade level) Tape & Reel LM2904YST minI SO-8 (automotive grade level) Tape & Reel LM2904PT LM2904ST LM2904YD/YDT -40, +125°C 2904 K403 2904Y 2/15 k409
PAGE 3
LM2904 1 Absolute Maximum Ratings Absolute Maximum Ratings Table 1. Key parameters and their absolute maximum ratings Symbol Parameter Value Unit VCC Supply Voltage +32 V Vid Differential Input Voltage +32 V VI Input Voltage -0.
PAGE 4
Typical Application Schematic 2 LM2904 Typical Application Schematic Figure 1.
PAGE 5
LM2904 3 Electrical Characteristics Electrical Characteristics Table 2. VCC+ = 5V, Vcc- = Ground, VO = 1.4V, Tamb = 25°C (unless otherwise specified) Symbol Parameter Min. Typ. Max. Unit Vio Input Offset Voltage (1) Tamb = 25°C Tmin ≤ Tamb ≤ T max. 2 7 9 mV Iio Input Offset Current Tamb = 25°C Tmin ≤ Tamb ≤ T max. 2 30 40 nA Iib Input Bias Current (2) Tamb = 25°C Tmin ≤ Tamb ≤ T max. 20 150 200 nA Large Signal Voltage Gain Avd SVR VCC+ = +15V,RL=2kΩ, Vo = 1.4V to 11.
PAGE 6
Electrical Characteristics Symbol VOH LM2904 Parameter High Level Output Voltage (Vcc + 30V) Tamb = +25°C, RL = 2kΩ Tmin ≤ Tamb ≤ T max. Tamb = +25°C, RL = 10kΩ Tmin ≤ Tamb ≤ T max. 26 26 27 27 Typ. Max. Unit 27 V 28 VOL Low Level Output Voltage (RL = 10kΩ) Tamb = +25°C Tmin ≤ Tamb ≤ T max SR Slew Rate Vcc = 15V, Vi = 0.5 to 3V, RL = 2kΩ, CL = 100pF, unity gain 0.3 0.6 GBP Gain Bandwidth Product f = 100kHz Vcc = 30V, Vin = 10mV, RL = 2kΩ, CL = 100pF 0.7 1.
PAGE 7
LM2904 Electrical Characteristics Figure 2. Open loop frequency response Figure 3. Large signal frequency response OPEN LOOP FREQUENCY RESPONSE (NOTE 3) LARGE SIGNAL FREQUENCY RESPONSE 20 140 100k Ω 10MΩ 1k Ω 0.1µF VCC VOLTAGE GAIN (dB) - 100 VO VI VCC/2 + 80 VCC = 30V & -55°C Tamb +125°C 60 40 20 VCC = +10 to + 15V & -55°C Tamb +125°C 15 10 100 1k 10k 100k 1M 5 10M 1k 10k Figure 5.
PAGE 8
Electrical Characteristics Figure 8. LM2904 Input current Figure 9. Current limiting CURRENT LIMITING (Note 1) INPUT CURRENT (Note 1) 90 90 VI = 0 V 70 VCC = +30 V 60 50 VCC = +15 V 40 30 VCC = +5 V 20 - 80 OUTPUT CURRENT (mA) INPUT CURRENT (mA) 80 60 + 50 40 30 20 10 10 0 0 -55 -35 -15 5 25 45 65 85 105 -55 -35 125 TEMPERATURE (°C) -15 5 25 45 65 85 105 125 TEMPERATURE (°C) Figure 10. Input voltage range Figure 11.
PAGE 9
LM2904 Electrical Characteristics Figure 15. Gain bandwidth product GAIN BANDWIDTH PRODUCT (MHz) Figure 14. Positive supply voltage 160 R L = 20k Ω VOLTAGE GAIN (dB) 120 R L = 2k Ω 80 40 0 10 20 30 1.5 1.35 1.2 1.05 0.9 15V 0.6 0.45 0.3 0.15 0 -55-35-15 5 25 45 65 85 105 125 TEMPERATURE (°C) POSITIVE SUPPLY VOLTAGE (V) Figure 17. Common mode rejection ratio COMMON MODE REJECTION RATIO (dB) Figure 16. Power supply rejection ratio POWER SUPPLY REJECTION RATIO (dB) VCC = 0.
PAGE 10
Electrical Characteristics LM2904 Figure 20. Non-inverting DC gain Figure 21. DC summing amplifier e1 10kΩ eO 1/2 LM2904 +5V 100kΩ e2 100kΩ e3 100kΩ e O 100kΩ e4 0 100kΩ eo = e1 + e2 - e3 - e4 where (e1 + e2) ≥ (e3 + e4) to keep eo ≥ 0V e I (mV) Figure 22. High input Z, DC differential amplifier Figure 23. Using symmetrical amplifiers to reduce input current 1/2 I eI R4 100kΩ R2 100kΩ R1 100kΩ 1/2 LM2904 IB I 2N 929 0.
PAGE 11
LM2904 4 Package Mechanical Data Package Mechanical Data In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a Lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.
PAGE 12
Package Mechanical Data 4.2 LM2904 SO-8 Package SO-8 MECHANICAL DATA DIM. mm. MIN. TYP inch MAX. MIN. TYP. MAX. A 1.35 1.75 0.053 0.069 A1 0.10 0.25 0.04 0.010 A2 1.10 1.65 0.043 0.065 B 0.33 0.51 0.013 0.020 C 0.19 0.25 0.007 0.010 D 4.80 5.00 0.189 0.197 E 3.80 4.00 0.150 0.157 e 1.27 0.050 H 5.80 6.20 0.228 0.244 h 0.25 0.50 0.010 0.020 L 0.40 1.27 0.016 0.050 k ddd 8˚ (max.) 0.1 0.
PAGE 13
LM2904 4.3 Package Mechanical Data TSSOP8 Package TSSOP8 MECHANICAL DATA mm. inch DIM. MIN. TYP A MAX. MIN. TYP. 1.2 A1 0.05 A2 0.80 b MAX. 0.047 0.15 0.002 1.05 0.031 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.008 D 2.90 3.00 3.10 0.114 0.118 0.122 E 6.20 6.40 6.60 0.244 0.252 0.260 E1 4.30 4.40 4.50 0.169 0.173 0.177 e 0.65 K 0˚ L 0.45 L1 1.00 0.60 1 0.006 0.039 0.041 0.0256 8˚ 0˚ 0.75 0.018 8˚ 0.024 0.030 0.
PAGE 14
Package Mechanical Data 4.
PAGE 15
LM2904 5 Revision History Revision History Date Revision Changes Jan. 2002 1 – Initial release. June 2005 2 – PPAP references inserted in the datasheet see table Order Codes on page 2 – ESD protection inserted in Table 1.: Key parameters and their absolute maximum ratings on page 4. Oct. 2005 3 – PPAP part numbers added in table Order Codes on page 2. Dec. 2005 4 – Pin connections identification added on drawing see page1. – Thermal Resistance Junction to Case information added see Table 1.