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LM1894 数据表(PDF) 3 Page - Texas Instruments |
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LM1894 数据表(HTML) 3 Page - Texas Instruments |
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3 / 19 page  LM1894 www.ti.com SNAS551C – DECEMBER 1994 – REVISED APRIL 2013 Electrical Characteristics VS = 8V, TA = 25°C, VIN = 300 mV at 1 kHz, circuit shown in Figure 1 unless otherwise specified Parameter Conditions Min Typ Max Units Operating Supply Range 4.5 8 18 V Supply Current VS = 8V 17 30 mA MAIN SIGNAL PATH Voltage Gain DC Ground Pin 9(1) −0.9 −1 −1.1 V/V DC Output Voltage 3.7 4.0 4.3 V Channel Balance DC Ground Pin 9 −1.0 1.0 dB Minimum Balance AC Ground Pin 9 with 0.1 675 965 1400 Hz μFCapacitor(1) Maximum Bandwidth DC Ground Pin 9(1) 27 34 46 kHz Effective Noise Reduction CCIR/ARM Weighted(2) −10 −14 dB Total Harmonic Distortion DC Ground Pin 9 0.05 0.1 % Input Headroom Maximum VIN for 3% THD 1.0 Vrms AC Ground Pin 9 Output Headroom Maximum VOUT for 3% THD VS − 1.5 Vp-p DC Ground Pin 9 Signal to Noise BW = 20 Hz–20 kHz, re 300 mV AC Ground Pin 9 79 dB DC Ground Pin 9 77 dB CCIR/ARM Weighted re 300 mV(3) AC Ground Pin 9 82 88 dB DC Ground Pin 9 70 76 dB CCIR Peak, re 300 mV(4) AC Ground Pin 9 77 dB DC Ground Pin 9 64 dB Input Impedance Pin 2 and Pin 13 14 20 26 k Ω Channel Separation DC Ground Pin 9 −50 −70 dB Power Supply Rejection C14 = 100 μF, VRIPPLE = 500 mVrms, −40 −56 dB f = 1 kHz Output DC Shift Reference DVM to Pin 14 and Measuree Output DC Shift from 4.0 20 mV Minimum to Maximum Band-width(5) (1) To force the DNR system into maximum bandwidth, DC ground the input to the peak detector, pin 9. A negative temperature coefficient of −0.5%/°C on the bandwidth, reduces the maximum bandwidth at increased ambient temperature or higher package dissipation. AC ground pin 9 or pin 6 to select minimum bandwidth. To change minimum and maximum bandwidth, see Application Hints. (2) The maximum noise reduction CCIR/ARM weighted is about 14 dB. This is accomplished by changing the bandwidth from maximum to minimum. In actual operation, minimum bandwidth is not selected, a nominal minimum bandwidth of about 2 kHz gives −10 dB of noise reduction. See Application Hints. (3) The CCIR/ARM weighted noise is measured with a 40 dB gain amplifier between the DNR system and the CCIR weighting filter; it is then input referred. (4) Measured using the Rhode-Schwartz psophometer. (5) Pin 10 is DC forced half way between the maximum bandwidth DC level and minimum bandwidth DC level. An AC 1 kHz signal is then applied to pin 10. Its peak-to-peak amplitude is VDC (max BW) − VDC (min BW). Copyright © 1994–2013, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LM1894 |
类似零件编号 - LM1894 |
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类似说明 - LM1894 |
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