General description

LMC8101 is a kind of rail -to -line input and output high -performance CMOS operational amplifier. LMC8101 is an ideal low -voltage (2.7V to 10V) application rail input and output. LMC8101 is compared with micro -SMD and 8 -needle MSOP components of mold size. The number of circuit boards required for micro SMD packaging is reduced by 75%compared with SOT23-5 package. LMC8101 is an upgrade of industrial standard LMC7101. LMC8101 uses a simple user control shutdown method. This makes it easy to use and reduce the total power supply to a typical value of 1NA. This can extend the life of the battery to require energy -saving life. The stop input can use SL to set threshold pins relative to V+or V-settings (please refer to the application annotation part). Other improvements include improved offset voltage restrictions, three times the output current driver, and reduce 1/F noise compared to the industrial standard LMC7101 operational amplifier. This makes LMC8101 an ideal choice, wireless communication and industrial applications for many battery power supply.

Features

vs 2.7V, TA 25 ; C, RL to V+/2, typical values, unless clearly specified.

Rail -to -rail input

Rail output

Swing in the range of 35mv (RL 2K ), provides n packaging:

] Micro -patch package 1.39mm x 1.41mm

MSOP component 3.0mm x 4.9mm

Low power current lt; 1MA (maximum)

The shutdown current is 1 μA (maximum)

Multi -function shutdown function 10 μs Open

output short -circuit current 10mA

The offset voltage ± 5 mV (maximum)

Increase bandwidth 1MHz

[ 123] Power supply voltage range 2.7V-10V

THD 0.18%N voltage noise 36

Portable communication (voice, data)

Mobile phone power supply Amplifier control loop

buffer amplifier

Active filter

battery induction

VCO loop

Absolute maximum rated value (Note 1 1 1 1 (Note 1 1 1 1 (Note 1 1 1 )

ESD tolerance 2kV (Note 2)

200V (Note 13)

VIN Different Time (Note 3, 11)

Power voltage (V+ V ) 12 volts

input/output pin voltage v ++ 0.8V, v 0.8v

Input input The current at the pin +/-10mA

Output pin current (Note 3, 12) +/- 80mA

The current at the power supply foot +/- 80ma

] Storage temperature range 65 ; C to+150 ; C

Jiecin (Note 4)+150 ; C

welding information

[

123] Infrared or convection (20 seconds) 235 ; C

Peak welding (10 seconds) 260 ; c

Working rate (Note 1)

Power voltage (V+-V ) 2.7 volts to 10 volts

Concluding temperature range (Note 4) 40 ; C to+85 ; C

Packaging thermal resistance (θja) (Note 4)

Micro SMD 220 ; C/W

MSOP packaging. 8th needle surface installation 230 ; C/W

2.7V electrical characteristics

Unless there are other regulations, TJ 25 ; C, V+ 2.7V, V 0V, VCM VO V all guaranteed limit+/2 and RL GT; 1 m to v+/2. Rough body restrictions are suitable for extreme temperatures.

2.7V electrical characteristics (continued)

Unless there are other regulations, TJ 25 ; C, V+ 2.7V, V 0v, all guarantees of vcm vo v+/2 and RL GT; 1 m to V+/2. Rough body restrictions are suitable for extreme temperatures.

+/ 5V electrical characteristics

Unless there are other regulations, TJ 25 ; c, v+ 5V, V # 8722; 5V, VCM VO 0V, and RL GT; 1 m to all limits to GND. Rough body restrictions are suitable for extreme temperatures.

+/ 5V electrical characteristics (continued)

Unless otherwise regulations, TJ 25 ; C, V+ 5V , V 5V, VCM VO 0V, and RL gt; 1 m to all limits to GND. Rough body restrictions are suitable for extreme temperatures.

+/ 5V electrical characteristics (continued)

Note 1: Absolute maximum rated value indicates the limit of damage to the device. The work rated value indicates that the device is in a normal working state, but the specific performance cannot be guaranteed. Please refer to the electrical characteristics about the specifications and test conditions of the guarantee.

Note 2: Human model, 1.5K , 100pf series.

Note 3: Applicable to single power and sub -supply operations. Continuous short -circuit operations at higher environmental temperatures can lead to a maximum allowed temperature of 150 ° C. Long -term output current that exceeds 40ma may adversely affect reliability.

Note 4: The maximum power consumption is the functions of TJ (MAX), θJa, and TA. The maximum allowable power consumption at any ambient temperature is pd (tj (max) ta)/θja. All numbers are suitable for packaging directly welded to the PC board.

Note 5: Typical values represent the most likely parameter specifications.

Note 6: All limits are guaranteed by testing or statistical analysis.

Note 7: Positive current corresponds to the current of the inflow device.

Note 8: The rotation rate is one of the slower rotation rate in the rise and decrease.

Note 9: Time and closing time of the shutdown refers to the time setting of 90%and 10%of the output of its final peaks under the following circumstances. Snuar wave, 2K load, av +10.

Note 10: Only when the input voltage exceeds the absolute maximum input voltage rated value, it is necessary to limit the input pin current.

Note 11: Short -circuit test is instantaneous test. See Note 12.

Note 12: VS LT; 6V, the short -circuit duration of the output is infinite. Otherwise, long -term output short circuit may damage the equipment.

Note 13: Machine model, 0 , connect with 200pf.

Application notice

Ship off function:

LMC8101 can be closed to continue power supply. Once closed, the equipment power supply current is significantly reduced (maximum 1 μA), and the output will be a triple statement . The shutdown function of LMC8101 is designed for flexibility. You can refer to the threshold level of the SD input to set V-or V+by setting the level on the SL input. SL input is connected to V-, SD threshold level reference V-value, vice versa. This threshold is about 1.5V power connected to the SL pin. Therefore, in this example, as long as the SD pin voltage is 0, the device will be shut down to ensure that the equipment is not within 1V rangeThe tremor between the active state and the closure state is lagging behind in the SD pins conversion (see the characteristics of the illustration in Figure 1). The stop threshold and lag level have nothing to do with the power supply voltage. Figure 1 diagram is also suitable for SL and V+and horizontal axes to be referenced as V+. The SD pin should not be set in the voltage range from 1.1V to 1.9V. Because this is a transition area, the selected power voltage equipment status will be uncertain.

Table 1 below summarizes when SL and SD pins are directly connected to V-or V+:

If you do not need to stop operation, if you do not need to stop operation, As shown in Table 1, SL and SD pins can be simply connected to the reverse supply node to achieve active operation. SL companies and SDs should always be bound to a node; if they are not connected, these high impedance inputs will float to an undeterished state and equipment status. When the device is closed, once the active operation is activated, the device output is set to be set to its final value before startup. In addition, when the device is converted to a complete working state, some output peak may appear. Some applications may make sensitive output peaks and appropriate prevention measures in order to ensure that they can work normally at any time.

Application description (continued)

Converted board: In order to simplify the conversion board (LMC8101CONV) for the board of directors such as micro SMD. This circuit board puts the miniature SMD device into 8 -needle DIP packaging (see Figure 2, the CON version board pins) to facilitate operation and evaluation.

Increase the output current: Compared with LMC7101, LMC8101 improved the output source current and sinking current that can reach three times the output level. This improvement will allow the output voltage swing range to connect to a relatively heavier load than LMC7101. This is an extra benefit for a lower power supply voltage, because it increases the output swing range. For example, LMC8101 can usually swing 2.5VPP, 2MA source and sinking output current (vs 2.7V), while LMC7101 output is limited to 1.9VPP under the same conditions. In addition, LMC8101 can consume more power than LMC7101 in the SOT23 package, because the thermal performance of MSOP and Micro-SMD packaging has increased the dissipation capacity of 40%.

Low 1/F noise: The main input noise item of LMC8101 is the input noise voltage. The input noise current of this device has no practical significance, unless the equivalent resistance looks like 5m or higher. The low -frequency noise statement of LMC8101 is lower instead of LMC7101. For example, at 10Hz, the reference point noise voltage density is 85NV, which is equivalent to 200NV of LMC7101. In 0The LMC8101 within the frequency range of 11Hz to 100Hz will be better than LMC7101.

Lower thread: When connected to a heavier load, the THD of LMC8101 is compared with LMC7101. For example, 5V power supply at 10kHz, 2VPP swing (AV 2), LMC8101 THD (0.2%) is 60%lower than LMC7101. LMC8101 THD uses 3VPP on the output end to maintain 10kHz below 0.1%(reference typical feature diagram).

Improving capacity load driving capacity: This can be implemented in several ways: increased output resistance load increase: phase margin increases as the load increases (see typical feature diagrams). During capacitor drives, loads and stability can usually pass through the output current of the load. For example, the hat load driving capacity can be increased from 8200pf to the output load from 5K increased to 600 , then 16000pf (AV +10, 25%over -built limit, 10V power supply). The isolation resistance between the output and the capacitance load: The resistor will beolate the feedback path (if the phase shift caused by over -output capacitors will cause unstable) from the capacitance load. Use 10V power supply, 100 isolation resistor allows an unlimited unlimited capacitor load to be compared with only 300pf without this resistor (AV +1). Higher power voltage: operate LMC8101 at higher power supply voltage to allow higher bearing capacity. The upper limit of the power supply voltage at the low voltage of 10V is increased to about 600pf (AV +1).

Increased closed -loop gain: Limc8101, LMC8101, increases with the increase in the closed loop gain. In applications that are mainly capacitive loads and light resistance loads, when LMC8101 runs a closed -loop gain greater than +1.

Typical performance characteristics vs 2.7V, single power supply, vcm v+/2, ta 25 ; 123]