công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
|
MC33074ADG bảng dữ liệu(PDF) 11 Page - ON Semiconductor |
|
MC33074ADG bảng dữ liệu(HTML) 11 Page - ON Semiconductor |
11 / 25 page MC34071,2,4,A MC33071,2,4,A, NCV33072,4,A http://onsemi.com 11 values of feedback resistances (lower current DACs). This input pole can be compensated for by creating a feedback zero with a capacitance across the feedback resistance, if necessary, to reduce overshoot. For 2.0 k W of feedback resistance, the MC34071 series can settle to within 1/2 LSB of 8−bits in 1.0 ms, and within 1/2 LSB of 12−bits in 2.2 ms for a 10 V step. In a inverting unity gain fast settling configuration, the symmetrical slew rate is ±13 V/ms. In the classic noninverting unity gain configuration, the output positive slew rate is +10 V/ ms, and the corresponding negative slew rate will exceed the positive slew rate as a function of the fall time of the input waveform. Since the bipolar input device matching characteristics are superior to that of JFETs, a low untrimmed maximum offset voltage of 3.0 mV prime and 5.0 mV downgrade can be economically offered with high frequency performance characteristics. This combination is ideal for low cost precision, high speed quad op amp applications. The all NPN output stage, shown in its basic form on the equivalent circuit schematic, offers unique advantages over the more conventional NPN/PNP transistor Class AB output stage. A 10 k W load resistance can swing within 1.0 V of the positive rail (VCC), and within 0.3 V of the negative rail (VEE), providing a 28.7 Vpp swing from ±15 V supplies. This large output swing becomes most noticeable at lower supply voltages. The positive swing is limited by the saturation voltage of the current source transistor Q7, and VBE of the NPN pull up transistor Q17, and the voltage drop associated with the short circuit resistance, R7. The negative swing is limited by the saturation voltage of the pull−down transistor Q16, the voltage drop ILR6, and the voltage drop associated with resistance R7, where IL is the sink load current. For small valued sink currents, the above voltage drops are negligible, allowing the negative swing voltage to approach within millivolts of VEE. For large valued sink currents (>5.0 mA), diode D3 clamps the voltage across R6, thus limiting the negative swing to the saturation voltage of Q16, plus the forward diode drop of D3 ( ≈VEE +1.0 V). Thus for a given supply voltage, unprecedented peak−to−peak output voltage swing is possible as indicated by the output swing specifications. If the load resistance is referenced to VCC instead of ground for single supply applications, the maximum possible output swing can be achieved for a given supply voltage. For light load currents, the load resistance will pull the output to VCC during the positive swing and the output will pull the load resistance near ground during the negative swing. The load resistance value should be much less than that of the feedback resistance to maximize pull up capability. Because the PNP output emitter−follower transistor has been eliminated, the MC34071 series offers a 20 mA minimum current sink capability, typically to an output voltage of (VEE +1.8 V). In single supply applications the output can directly source or sink base current from a common emitter NPN transistor for fast high current switching applications. In addition, the all NPN transistor output stage is inherently fast, contributing to the bipolar amplifier’s high gain bandwidth product and fast settling capability. The associated high frequency low output impedance (30 W typ @ 1.0 MHz) allows capacitive drive capability from 0 pF to 10,000 pF without oscillation in the unity closed loop gain configuration. The 60 ° phase margin and 12 dB gain margin as well as the general gain and phase characteristics are virtually independent of the source/sink output swing conditions. This allows easier system phase compensation, since output swing will not be a phase consideration. The high frequency characteristics of the MC34071 series also allow excellent high frequency active filter capability, especially for low voltage single supply applications. Although the single supply specifications is defined at 5.0 V, these amplifiers are functional to 3.0 V @ 25 °C although slight changes in parametrics such as bandwidth, slew rate, and DC gain may occur. If power to this integrated circuit is applied in reverse polarity or if the IC is installed backwards in a socket, large unlimited current surges will occur through the device that may result in device destruction. Special static precautions are not necessary for these bipolar amplifiers since there are no MOS transistors on the die. As with most high frequency amplifiers, proper lead dress, component placement, and PC board layout should be exercised for optimum frequency performance. For example, long unshielded input or output leads may result in unwanted input−output coupling. In order to preserve the relatively low input capacitance associated with these amplifiers, resistors connected to the inputs should be immediately adjacent to the input pin to minimize additional stray input capacitance. This not only minimizes the input pole for optimum frequency response, but also minimizes extraneous “pick up” at this node. Supply decoupling with adequate capacitance immediately adjacent to the supply pin is also important, particularly over temperature, since many types of decoupling capacitors exhibit great impedance changes over temperature. The output of any one amplifier is current limited and thus protected from a direct short to ground. However, under such conditions, it is important not to allow the device to exceed the maximum junction temperature rating. Typically for ±15 V supplies, any one output can be shorted continuously to ground without exceeding the maximum temperature rating. |
Số phần tương tự - MC33074ADG |
|
Mô tả tương tự - MC33074ADG |
|
|
Link URL |
Chính sách bảo mật |
ALLDATASHEET.VN |
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không? [ DONATE ] |
Alldatasheet là | Quảng cáo | Liên lạc với chúng tôi | Chính sách bảo mật | Trao đổi link | Tìm kiếm theo nhà sản xuất All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |