Operational amplifiers of the KR1446 and KF1446 series. Reference data

Encyclopedia of radio electronics and electrical engineering / Reference materials

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Operational Amplifiers , K F 1446 1 1 1446 UD 1A - KF1 UD 1V, KF 446 1 UD 2 ZA -KF 1 446UD 1V, KF2UD1446A-KF13UD1446V are manufactured using CMOS technology. The peculiarity of these amplifiers, as well as the OU KR13UD1446 - KR14UD144, is the upper limit of the permissible input and output voltage levels extended up to the voltage of the power supplies. According to the current consumption, microcircuits can be divided into micro-power ones (typical value of the consumed quiescent current is 6 μA per one op-amp) - KR14UD1446, KR1UD1, KF1446UD1 and KF1UD1, low-power (4 μA) - KR4UD6 and KF12UD1446 and universal (12 mA) - KR1 446UD1 and KF1UD446 .

Microcircuits of groups KR1446UD11, KR1446UD12, KR1446UD14 are designed in a plastic case with eight pins (Fig. 1, a), and KF1446UD11, KF1446UD12, KF1446UD14 - in an eight-pin plastic case, designed for surface mounting (Fig. 1, b). These devices contain two op amps in one housing. Microcircuits of the KR1446UD13 and KF1446UD13 groups are produced in a fourteen-pin plastic case - fig. 1, c and fig. 1, d, respectively, both contain four op amps in one package. The parameters of the amplifiers included in the KR1446UD12, KR1446UD13, KF1446UD12, KF1446UD13 microcircuits are the same.

On the case of each microcircuit, its full name is applied, except for the letter index. Devices with the letter index B are marked with one dot of a contrasting color on the body, with the index B - with two dots. Devices of group A are not marked. Marking with an index in the form of a letter is also possible. On fig. 2 shows the pinout of the devices.

The described operational amplifiers are conveniently used in various small-amplitude-to-pulse AC voltage converters with logic levels for supplying digital microcircuits (especially CMOS structures) to the inputs, to control the current consumed by various devices powered by op-amps from their own sources (in power supplies, in automotive devices for monitoring the health of lamps, etc.), as well as in all cases when the maximum use of the supply voltage is required both at the inputs and at the outputs of the OS. from 1446 to 1 V.

In the future, all numerical and graphical characteristics are presented for the op-amp of the KR1446 series, for the op-amp of the KF1446 series of the corresponding groups, the characteristics are identical.

Main technical characteristics*

• Current consumed by a single OU, mA, no more, for KR1446UD11A - KR1446UD11V......2
• КР1446УД12А- КР1446УД12В, КР1446УД13А - КР1446УД13В......0.02
• КР1446УД14А- КР1446УД14В......0,2
• Gain, dB, not less......76
• typical value......96
• The lower limit of the output voltage, V ...... ± 2,4
• Unity gain frequency, MHz, typical value, for KR1446UD11A - KR1446UD11V ...... 1,8
• KR1446UD12A - KR1446UD12V, KR1446UD13A - KR1446UD13V ...... 0,06
• КР1446УД14А - КР1446УД14В......0,75
• Phase margin**, degrees, typical value, for KR1446UD11A - KR1446UD11V......60
• KR1446UD12A - KR1446UD12V, KR1446UD13A - KR1446UD13V, KR1446UD14A - KR1446UD14V......70
• Noise voltage reduced to the input at a frequency of 1 kHz, μV / l / Hz, typical value ...... 0,14
• Common-mode attenuation factor, dB, not less......60
• typical value, for KR1446UD11A - KR1446UD11V......74
• KR1446UD12A - KR1446UD12V, KR1446UD13A - KR1446UD13V, KR1446UD14A - KR1446UD14V......70
• Power supply attenuation coefficient, dB, typical value......70
• Input resistance, MΩ, not less than......1000
• Output voltage slew rate, V/µs, not less, for KR1446UD11A - KR1446UD11V.....0,9
• typical value......1,5
• KR1446UD12A - KR1446UD12V, KR1446UD13A - KR1446UD13V ...... 0,015
• typical value .....0,025
• КР1446УД14А - КР1446УД14В......0,35
• typical value......0,7
• The maximum value of the "zero" bias voltage, mV, for KR1446UD11A, KR1446UD14A......3
• КР1446УД11Б, КР1446УД12А, КР1446УД13А, КР1446УД14Б......6
• КР1446УД11В, КР1446УД12Б, КР1446УД13Б, КР1446УД14В......12
• КР1446УД12В, КР1446УД13В.......18
• Zero bias voltage temperature coefficient, µV/°С, typical value......10
• Output current when the output is closed to the positive or negative wire of the power source*** at a supply voltage of 10 V, mA,
• no more, for KR1446UD11A - KR1446UD11V......100
• KR1446UD12A - KR1446UD12V, KF1446UD11A - KF1446UD11V, for the rest - not limited.
• КР1446УД13А - КР1446УД13В...1
• КР1446УД14А - КР1446УД14В......10

Maximum permissible operating values

• Supply voltage, V, unipolar......3...12
• bipolar ...... 2x (1,5 ... 6)
• Load capacity, pf, no more ...... 100
• Temperature operating range, °С......-10...+85

* All parameters are given for supply voltage 2x2,5 V, ambient temperature 25 °С and load resistance 10 kΩ for KR1446UD11, 100 kΩ for KR1446UD14 and 1 MΩ for KR1446UD12, KR1446UD13. The dynamic parameters correspond to the capacitance of a 100 pF capacitor connected in parallel with the load with the specified active resistance.

** Phase margin - up to 180 degrees complementary angle to op amp phase shift at unity gain frequency.

*** Duration of closing the output to the positive or negative wire of the power source should not exceed 1 s for KR1446UD11A-KR1446UD11V, KF1446UD11A-KF1446UD11V, for the rest it is not limited.

On fig. 3 shows the dependences of the quiescent current of a single op-amp of different groups on the supply voltage, and in fig. 4 - on temperature.

Rice. 5 shows the temperature dependence of the instrument gain.

Op-amps of the KR1446 series provide high values ​​of the attenuation coefficient of common mode noise and power supply noise. These coefficients depend little on temperature (Fig. 6).

The frequency dependence of the noise voltage reduced to the input of the op-amp is shown in fig. 7, and in fig. 8 - dependence of the maximum output current on the supply voltage.

The impulse response of the op-amp in the voltage follower mode is shown in fig. 9 - 11 for all instrument groups.

The common-mode voltage at the inputs of the amplifiers can exceed the supply voltage (in absolute value) by 0,3 V. At the same time, high gain and a small "zero shift" are maintained, but the opening built-in input protection diodes lower the input resistance.

Author: S. Biryukov, Moscow

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