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AFE5807 Datasheet(PDF) 6 Page - Texas Instruments |
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AFE5807 Datasheet(HTML) 6 Page - Texas Instruments |
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6 / 75 page  u 8CH_SNR - 10 N 10 1 1 C = x - 1CH_SNR N + N 56 7 - C 10 10 AFE5807 SLOS703C – SEPTEMBER 2010 – REVISED MAY 2013 www.ti.com ELECTRICAL CHARACTERISTICS AVDD_5V = 5V, AVDD = 3.3V, AVDD_ADC = 1.8V, DVDD = 1.8V, AC-coupled with 0.1µF at INP and bypassed to ground with 15nF at INM, No active termination, VCNTL= 0V, fIN = 5MHz, LNA = 18dB, PGA = 24dB, 12Bit, sample rate = 80MSPS, LPF Filter = 15MHz, low power mode (default power mode), VOUT = –1dBFS, internal 500Ω CW feedback resistor, CMOS CW clocks, ADC configured in internal reference mode, Single-ended VCNTL mode, VCNTLM = GND, at ambient temperature TA = 25°C, unless otherwise noted. Min and max values are specified across full-temperature range with AVDD_5V = 5V, AVDD = 3.3V, AVDD_ADC = 1.8V, DVDD = 1.8V PARAMETER TEST CONDITION MIN TYP MAX UNITS TGC FULL SIGNAL CHANNEL (LNA+VCAT+LPF+ADC) Rs = 0 Ω, f = 2MHz, LNA = 24/18/12dB, PGA = 24dB 0.80/0.87/1.28 Input voltage noise over LNA Gain (low nV/rtHz noise mode) Rs = 0 Ω, f = 2MHz,LNA = 24/18/12dB, PGA = 30dB 0.75/0.8/1.1 Rs = 0 Ω, f = 2MHz,LNA = 24/18/12dB, PGA = 24dB 1.12/1.2/1.47 Input voltage noise over LNA Gain (low en (RTI) nV/rtHz power mode, i.e. default power mode) Rs = 0 Ω, f = 2MHz, LNA = 24/18/12dB, PGA = 30dB 1.05/1.1/1.27 Rs = 0 Ω, f = 2MHz,LNA = 24/18/12dB, PGA = 24dB 1.01/1.1/1.35 Input Voltage Noise over LNA nV/rtHz Gain(Medium Power Mode) Rs = 0 Ω, f = 2MHz, LNA = 24/18/12dB, PGA = 30dB 0.95/1.0/1.17 Input referred current noise Low power mode/Medium power mode/Low noise mode 2/2.1/2.7 pA/rtHz Rs = 200 Ω, 200Ω active termination, PGA = 24dB,LNA = 12/18/24dB 4.5/2.95/2.1 dB Rs = 100 Ω, 100Ω active termination, PGA = 24dB,LNA = 12/18/24dB 6.5/4.3/3.3 dB Rs = 200 Ω, 200Ω Active Termination , PGA = 24dB, NF Noise figure 3.85/2.4/1.8 dB LNA = 12/18/24dB Low noise mode Rs = 100 Ω, 100Ω Active Termination , PGA=24dB,LNA = 5.3/3.6/3.1 dB 12/18/24dB Low noise mode VMAX Maximum Linear Input Voltage LNA gain = 24/18/12dB 250/500/1000 mVpp VCLAMP Clamp Voltage Reg52[10:9] = 0, LNA = 24/18/12dB 350/600/1150 Low noise mode 24/30 PGA Gain dB Medium/Low or default power mode 24/28.5 LNA = 24dB, PGA = 30dB, Low noise mode 54 Total gain LNA = 24dB, PGA = 30dB, Med power mode 52.5 dB LNA = 24dB, PGA = 30dB, Low power mode (default power mode) 52.5 Ch-CH Noise Correlation Factor without Summing of 8 channels 0 Signal (1) Full band (VCNTL = 0/0.8) 0.1/0.2 Ch-CH Noise Correlation Factor with Signal (1) 1MHz band over carrier (VCNTL= 0/0.8) 0.1/0.78 VCNTL= 0.6V (22 dB total channel gain) 64 66.3 VCNTL= 0, LNA = 18dB, PGA = 24dB 57 59.7 VCNTL= 0, LNA = 24dB, PGA = 24dB 54.7 Signal to Noise Ratio (SNR) dBFS VCNTL = 0.6V (22 dB total channel gain) Low Noise mode 67.5 VCNTL = 0, LNA = 18dB, PGA = 24dB Low Noise mode 62.5 VCNTL = 0, LNA = 24dB, PGA = 24dB Low Noise mode 58 SNR over 2MHz band around carrier at VCNTL = 0.6V ( 22dB total gain) 73 76 dBFS Narrow Band SNR SNR over 2MHz band around carrier at VCNTL = 0.6V ( 22dB total gain) 77 dBFS Low Noise mode 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= 0.1V 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 (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. 6 Submit Documentation Feedback Copyright © 2010–2013, Texas Instruments Incorporated Product Folder Links: AFE5807 |
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