Datasheet

AFE5808A
www.ti.com SLOS729B –OCTOBER 2011–REVISED APRIL 2012
ELECTRICAL CHARACTERISTICS (continued)
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, V
CNTL
= 0 V, f
IN
= 5 MHz, LNA = 18 dB, PGA = 24 dB, 14Bit, sample
rate = 65 MSPS, LPF Filter = 15 MHz, low noise mode, V
OUT
= –1 dBFS, internal 500 Ω 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_5 V = 5 V,
AVDD = 3.3 V, AVDD_ADC = 1.8 V, DVDD = 1.8 V
PARAMETER TEST CONDITION MIN TYP MAX UNITS
AC ACCURACY
LPF Bandwidth tolerance ±5%
CH-CH group delay variation 2 MHz to 15 MHz 2 ns
CH-CH Phase variation 15 MHz signal 11 Degree
0 V < VCNTL < 0.1 V (Dev-to-Dev) ±0.5
0.1 V < VCNTL < 1.1 V(Dev-to-Dev) –0.9 ±0.5 0.9
Gain matching dB
0.1 V < VCNTL < 1.1 V(Dev-to-Dev) Temp = 0°C and 85°C –1.1 ±0.5 1.1
1.1 V < VCNTL < 1.5 V(Dev-to-Dev) ±0.5
Gain matching Channel-to-Channel ±0.25 dB
Output offset V
cntl
= 0, PGA = 30 dB, LNA = 24 dB –75 75 LSB
AC PERFORMANCE
Fin = 2 MHz; V
OUT
= -1 dBFS –60
Fin = 5 MHz; V
OUT
= -1 dBFS –60
Fin = 5 MHz; V
IN
= 500 mVpp,
HD2 Second-Harmonic Distortion dBc
–55
V
OUT
= –1dBFS, LNA = 18dB, V
CNTL
=0.88 V
Fin = 5 MHz; Vin = 250 mVpp,
–55
V
OUT
=–1 dBFS, LNA = 24dB, V
CNTL
= 0.88 V
Fin = 2 MHz; V
OUT
= –1dBFS –55
Fin = 5 MHz; V
OUT
= –1dBFS –55
Fin = 5 MHz; VIN = 500 mVpp,
HD3 Third-Harmonic Distortion dBc
–55
V
OUT
= –1 dBFS, LNA = 18 dB, V
CNTL
= 0.88 V
Fin = 5 MHz; VIN = 2 50 mVpp,
–55
V
OUT
= –1 dBFS, LNA = 24 dB, V
CNTL
= 0.88 V
Fin = 2 MHz; V
OUT
=–1 dBFS –55
THD Total Harmonic Distortion dBc
Fin = 5 MHz; V
OUT
=–1 dBFS –55
f1 = 5 MHz at –1dBFS,
IMD3 Intermodulation distortion –60 dBc
f2 = 5.01 MHz at –27 dBFS
XTALK Cross-talk Fin = 5 MHz; V
OUT
= –1 dBFS –65 dB
Phase Noise 1 kHz off 5 MHz (V
CNTL
=0V) –132 dBc/Hz
LNA
Input Referred Voltage Noise Rs = 0 Ω, f = 2MHz, Rin = High Z, Gain = 24/18/12 dB 0.63/0.70/0.9 nV/rtHz
High-Pass Filter -3 dB Cut-off Frequency 50/100/150/200 KHz
LNA linear output 4 V
PP
VCAT+ PGA
VCAT Input Noise 0dB/-40 dB Attenuation 2/10.5 nV/rtHz
PGA Input Noise 24 dB/30 dB 1.75 nV/rtHz
-3dB HPF cut-off Frequency 80 KHz
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