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LMH6521SQXNOPB bảng dữ liệu(PDF) 11 Page - Texas Instruments |
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11 / 28 page GAIN 0-5 200: ADC 6 LATCH RF LO ½ LMH6521 VCC 0.01 PF 0.01 PF 0.01 PF 0.01 PF 40.2: 40.2: 1 PH 1 PH ENABLE 0 100 200 300 400 500 -100 -50 0 50 100 150 200 250 FREQUENCY (MHz) R jX |Z| 0 100 200 300 400 500 -40 -20 0 20 40 60 80 FREQUENCY (MHz) R jX |Z| -40 -20 0 20 40 60 80 100 200 210 220 230 240 250 TEMPERATURE (degrees) Both Channels Enabled Vs = 4.5V Vs = 5.0V Vs = 5.5V 0 100 200 300 400 500 600 -100 -90 -80 -70 -60 -50 -40 -30 FREQUENCY (MHz) Ch A to Ch B Ch B to Ch A LMH6521 www.ti.com SNOSB47C – MAY 2011 – REVISED SEPTEMBER 2011 Typical Performance Characteristics (continued) V+ = 5V, Differential VOUT = 4V PP, R L = 200Ω, TA=25 °C, fin = 200 MHz, and Maximum Gain (0 Attenuation) Supply Current vs. Temperature Channel To Channel Isolation Input Impedance Output Impedance Application Information Figure 4. LMH6521 Typical Application INTRODUCTION The LMH6521 is a dual, digitally controlled variable gain amplifier designed for narrowband and wideband intermediate frequency sampling applications. The LMH6521 is optimized for accurate 0.5 dB gain steps with exceptional gain and phase matching between channels combined with low distortion products. Gain matching error is less than ±0.05 dB and phase matching error less than ±0.5 degrees over the entire attenuation range. This makes the LMH6521 ideal for driving analog-to-digital converters where high linearity is necessary. Figure 4 shows a typical application circuit. The LMH6521 has been designed for AC coupled applications and has been optimized to operate at frequencies greater than 3 MHz. Copyright © 2011, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: LMH6521 |
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