AFE5808A datasheet(7/66 Pages) TI1

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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, VCNTL = 0 V, fIN = 5 MHz, LNA = 18 dB, PGA = 24 dB, 14Bit, sample

rate = 65 MSPS, LPF Filter = 15 MHz, low noise mode, VOUT = –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

TA = 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

CH-CH Phase variation

15 MHz signal

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

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

Output offset

Vcntl= 0, PGA = 30 dB, LNA = 24 dB

–75

LSB

AC PERFORMANCE

Fin = 2 MHz; VOUT = -1 dBFS

–60

Fin = 5 MHz; VOUT = -1 dBFS

–60

Fin = 5 MHz; VIN= 500 mVpp,

HD2

Second-Harmonic Distortion

dBc

–55

VOUT = –1dBFS, LNA = 18dB, VCNTL=0.88 V

Fin = 5 MHz; Vin = 250 mVpp,

–55

VOUT =–1 dBFS, LNA = 24dB, VCNTL= 0.88 V

Fin = 2 MHz; VOUT = –1dBFS

–55

Fin = 5 MHz; VOUT = –1dBFS

–55

Fin = 5 MHz; VIN = 500 mVpp,

HD3

Third-Harmonic Distortion

dBc

–55

VOUT = –1 dBFS, LNA = 18 dB, VCNTL= 0.88 V

Fin = 5 MHz; VIN = 2 50 mVpp,

–55

VOUT = –1 dBFS, LNA = 24 dB, VCNTL= 0.88 V

Fin = 2 MHz; VOUT=–1 dBFS

–55

THD

Total Harmonic Distortion

dBc

Fin = 5 MHz; VOUT=–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; VOUT= –1 dBFS

–65

Phase Noise

1 kHz off 5 MHz (VCNTL=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

VPP

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

KHz

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