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AFE5804 Datasheet(PDF) 3 Page - Texas Instruments |
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AFE5804 Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 60 page  ELECTRICAL CHARACTERISTICS AFE5804 www.ti.com ................................................................................................................................................ SBOS442A – JUNE 2008 – REVISED SEPTEMBER 2008 At AVDD_5V = 5.0V, AVDD1 = AVDD2 = DVDD = 3.3V, LVDD = 1.8V, TGC mode I, single-ended input into LNA, ac-coupled (1.0 µF), V CNTL = 1.0V, fIN = 5MHz, Clock = 40MSPS, 50% duty cycle, LPF = 12.5MHz, internal reference mode, ISET = 56kΩ, LVDS buffer setting = 3.5mA, and ambient temperature TA = +25°C, unless otherwise noted. AFE5804 PARAMETER TEST CONDITIONS MIN TYP MAX UNIT PREAMPLIFIER (LNA) Gain A SE-input to differential output 20 dB Input voltage (TGC, PW modes) VIN Linear operation (HD2 ≤ 40dB) 280 mVPP (CW mode) Linear operation 220 mVPP Maximum input voltage Limited by internal diodes 600 mVPP Input voltage noise (TGC) en (RTI) RS = 0Ω, f = 2MHz 0.75 nV/ √Hz TGC mode I 3 pA/ √Hz Input current noise In (RTI) TGC mode II 1.7 pA/ √Hz Common-mode voltage, input VCMI Internally generated 2.4 V Bandwidth BW Small-signal, –3dB 55 MHz Input resistance RIN At 2.5MHz 8 k Ω Includes internal ESD and clamping Input capacitance CIN 16 pF diodes FULL-SIGNAL CHANNEL (LNA + VCA + LPF + ADC) Input voltage noise en RS = 0Ω, f = 2MHz, PGA = 30dB 0.89 nV/ √Hz (TGC mode I) Input voltage noise (TGC mode II) RS = 0Ω, f = 2MHz, PGA = 30dB 1.23 nV/ √Hz Input voltage noise (PW mode) RS = 0Ω, f = 2MHz, PGA = 30dB 1.03 nV/ √Hz Noise figure NF RS = 200Ω, f = 2MHz 1.1 dB Low-pass filter bandwidth LPF At –3dB, selectable through SPI 12.5, 17 MHz Bandwidth tolerance ±10 % High-pass filter HPF (First-order, due to internal ac-coupling) 200 kHz Group delay variation 1MHz to 10MHz ±3 ns ≤ 6dB overload to within 3%, Overload recovery 2 Clock Cycles VCNTL = 0V to 1.2V ACCURACY Gain (PGA) Selectable through SPI 20, 25, 27, 30 dB Total gain, max(1) LNA + PGA gain, VCNTL = 1.2V 47.5 49 50.5 dB VCNTL = 0V to 1.2V 46 dB Gain range VCNTL = 0.1V to 1.0V 40 dB 0V < VCNTL < 0.1V ±0.5 dB Gain error, absolute(2) 0.1V < VCNTL < 1.0V –1.5 ±0.5 +1.5 dB 1.0V < VCNTL < 1.2V ±0.5 dB Gain matching Channel-to-channel –0.5 ±0.25 +0.5 dB Offset error VCNTL = 1.2V, PGA = 30dB –39 +39 LSB Offset error drift (tempco) ±5 ppm/°C Clamp level Level internally fixed before LPF 2.3 VPP GAIN CONTROL (VCA) Input voltage range VCNTL Gain range = 46dB 0 to 1.2 V Gain slope VCNTL = 0.1V to 1.0V 44.4 dB/V Input resistance 25 k Ω Response time VCNTL = 0V to 1.2V step; to 90% signal 0.5 µs (1) Excludes digital gain within ADC. (2) Excludes error of internal reference. Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Link(s): AFE5804 |
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