Datasheet

AFE5808
www.ti.com SLOS688C –SEPTEMBER 2010–REVISED APRIL 2012
ELECTRICAL CHARACTERISTICS (continued)
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, V
CNTL
= 0V, f
IN
= 5MHz, LNA = 18dB, PGA = 24dB, 14Bit, sample rate = 65MSPS,
LPF Filter = 15MHz, low noise mode, V
OUT
= –1dBFS, internal 500Ω CW feedback resistor, CMOS CW clocks, ADC
configured in internal reference mode, Single-ended VCNTL mode, VCNTLM = GND, at ambient temperature T
A
= 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
AC ACCURACY
LPF Bandwidth tolerance ±5%
CH-CH group delay variation 2MHz to 15MHz 2 ns
CH-CH Phase variation 15MHz signal 11 Degree
0V < VCNTL< 0.1V (Dev-to-Dev) ±0.5
0.1V < VCNTL < 1.1V (Dev-to-Dev) –0.9 ±0.5 0.9
Gain matching dB
0.1V < VCNTL < 1.1V (Dev-to-Dev), Temp = 0°C and 85°C –1.1 ±0.5 1.1
1.1V < VCNTL < 1.5V (Dev-to-Dev) ±0.5
Gain matching Channel-to-Channel ±0.25 dB
Output offset VCNTL = 0, PGA = 30dB, LNA = 24dB –75 75 LSB
AC PERFORMANCE
Fin = 2MHz; V
OUT
= -1dBFS –60
Fin = 5MHz; V
OUT
= -1dBFS –60
Fin = 5MHz; V
IN
= 500mVpp,
HD2 Second-Harmonic Distortion dBc
–55
V
OUT
= –1dBFS, LNA = 18dB, VCNTL = 0.88V
Fin = 5MHz; V
IN
= 250mVpp,
–55
V
OUT
= –1dBFS, LNA = 24dB, VCNTL= 0.88V
Fin = 2MHz; V
OUT
= –1dBFS –55
Fin = 5MHz; V
OUT
= –1dBFS –55
Fin = 5MHz; V
IN
= 500mVpp,
HD3 Third-Harmonic Distortion dBc
–55
VOUT = –1dBFS, LNA = 18dB, VCNTL = 0.88V
Fin = 5MHz; V
IN
= 250mVpp,
–55
VOUT = –1dBFS, LNA = 24dB, VCNTL = 0.88V
Fin = 2MHz; V
OUT
= –1dBFS –55
THD Total Harmonic Distortion dBc
Fin = 5MHz; V
OUT
= –1dBFS –55
f1 = 5MHz at –1dBFS,
IMD3 Intermodulation distortion –60 dBc
f2 = 5.01MHz at –27dBFS
XTALK Cross-talk Fin = 5MHz; V
OUT
= –1dBFS –65 dB
Phase Noise 1kHz off 5MHz (VCNTL= 0V) –132 dBc/Hz
LNA
Input Referred Voltage Noise Rs = 0Ω, f = 2MHz, Rin = High Z, Gain = 24/18/12dB 0.63/0.70/0.9 nV/rtHz
High-Pass Filter -3dB Cut-off Frequency 50/100/150/200 KHz
LNA linear output 4 Vpp
VCAT+ PGA
VCAT Input Noise 0dB/-40dB Attenuation 2/10.5 nV/rtHz
PGA Input Noise 24dB/30dB 1.75 nV/rtHz
-3dB HPF cut-off Frequency 80 KHz
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