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AFE5809ZCF Datasheet(PDF) 8 Page - Texas Instruments |
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AFE5809ZCF Datasheet(HTML) 8 Page - Texas Instruments |
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8 / 90 page  u 8CH_SNR - 10 N 10 1 1 C = x - 1CH_SNR N + N 56 7 - C 10 10 AFE5809 SLOS738C – SEPTEMBER 2012 – REVISED JANUARY 2013 www.ti.com ELECTRICAL CHARACTERISTICS AVDD_5 V = 5 V, AVDD = 3.3 V, AVDD_ADC = 1.8 V, DVDD = 1.8 V, AC-coupled with 0.1 µF at INP and bypassed to ground with 15 nF at INM, No active termination, VCNTL = 0 V, fIN = 5 MHz, LNA = 18 dB, PGA = 24 dB, 14Bit, sample rate = 65MSPS, LPF Filter = 15 MHz, low noise mode, VOUT = –1 dBFS, Single-ended VCNTL mode, VCNTLM = GND, ADC configured in internal reference mode, internal 500 Ω CW feedback resistor, CMOS CW clocks, at ambient temperature TA = 25°C, Digital demodulator is disabled unless otherwise noted. Min and max values are specified across full-temperature range with AVDD_5 V = 5 V, AVDD = 3.3 V, AVDD_ADC = 1.8 V, DVDD = 1.8 V. PARAMETER TEST CONDITION MIN TYP MAX UNITS TGC FULL SIGNAL CHANNEL (LNA+VCAT+LPF+ADC) Rs = 0 Ω, f = 2 MHz, LNA = 24, 18, 12 dB, PGA = 2 4dB 0.76, 0.83, 1.16 Input voltage noise over LNA Gain(low nV/rtHz noise mode) Rs = 0 Ω, f = 2 MHz,LNA = 24, 18, 12 dB, PGA = 30 dB 0.75, 0.86, 1.12 Rs = 0 Ω, f = 2 MHz,LNA = 24, 18, 12 dB, PGA = 24 dB 1.1, 1.2, 1.45 Input voltage noise over LNA Gain(low en (RTI) nV/rtHz power mode) Rs = 0 Ω, f = 2 MHz, LNA = 24, 18, 12 dB, PGA = 30 dB 1.1, 1.2, 1.45 Rs = 0 Ω, f = 2 MHz,LNA = 24, 18, 12 dB, PGA = 24 dB 1, 1.05, 1.25 Input Voltage Noise over LNA nV/rtHz Gain(Medium Power Mode) Rs = 0 Ω, f = 2 MHz, LNA = 24, 18, 12 dB, PGA = 30 dB 0.95, 1, 1.2 en (RTI) Input voltage noise at low frequency f = 100 KHz, INM Cap=1uF, PGA integrator disabled 0.9 nV/rtHz Input referred current noise Low Noise Mode/Medium Power Mode/Low Power Mode 2.7, 2.1, 2 pA/rtHz Rs = 200 Ω, 200Ω active termination, PGA=24dB,LNA = 12, 18, 24 dB 3.85, 2.4, 1.8 dB NF Noise figure Rs = 100 Ω, 100 Ω active termination, PGA = 2 4dB,LNA = 12, 18, 24 dB 5.3, 3.1, 2.3 dB NF Noise figure Rs = 500 Ω, 1KΩ, no terminaiton, Low NF mode is enabled (Reg53[9]=1) 0.94, 1.08 dB NF Noise figure Rs=50 Ω/200Ω, no terminaiton, Low noise mode (Reg53[9]=0) 2.35, 1.05 dB VMAX Maximum Linear Input Voltage LNA gain = 24, 18, 12 dB 250, 500, 1000 mVpp VCLAMP Clamp Voltage Reg52[10:9] = 0, LNA = 24, 18, 12 dB 350, 600, 1150 Low noise mode 24, 30 PGA Gain dB Medium/Low power mode 24, 28.5 LNA = 2 4dB, PGA = 30 dB, Low noise mode 54 Total gain LNA = 24 dB, PGA = 30 dB, Med power mode 52.5 dB LNA = 24 dB, PGA = 30 dB, Low power mode 52.5 Ch-CH Noise Correlation Factor without Summing of 8 channels 0 Signal (1) Full band (VCNTL = 0, 0.8) 0.15, 0.17 Ch-CH Noise Correlation Factor with Signal (1) 1MHz band over carrier (VCNTL= 0, 0.8) 0.18, 0.75 VCNTL= 0.6V(22 dB total channel gain) 68 70 Signal to Noise Ratio (SNR) VCNTL= 0, LNA = 18dB, PGA = 24dB 59.3 63 dBFS VCNTL= 0, LNA = 24dB, PGA = 24dB 58 Narrow Band SNR SNR over 2 MHz band around carrier at VCNTL = 0.6 V ( 22 dB total gain) 75 77 dBFS Input Common-mode Voltage At INP and INM pins 2.4 V 8 k Ω Input resistance Preset active termination enabled 50,100,200,400 Ω Input capacitance 20 pF Input Control Voltage VCNTLP - VCNTLM 0 1.5 V Common-mode voltage VCNTLP and VCNTLM 0.75 V Gain Range -40 dB Gain Slope VCNTL= 0.1 V to 1.1V 35 dB/V Input Resistance Between VCNTLP and VCNTLM 200 K Ω Input Capacitance Between VCNTLP and VCNTLM 1 pF TGC Response Time VCNTL= 0V to 1.5V step function 1.5 µs 3rd order-Low-pass Filter 10, 15, 20, 30 MHz Settling time for change in LNA gain 14 µs Settling time for change in active 1 µs termination setting (1) Noise correlation factor is defined as Nc/(Nu+Nc), where Nc is the correlated noise power in single channel; and Nu is the uncorrelated noise power in single channel. Its measurement follows the below equation, in which the SNR of single channel signal and the SNR of summed eight channel signal are measured. 8 Submit Documentation Feedback Copyright © 2012–2013, Texas Instruments Incorporated Product Folder Links: AFE5809 |
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