AFE5804 datasheet(4/60 Pages) TI

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AFE5804

SBOS442A – JUNE 2008 – REVISED SEPTEMBER 2008 ................................................................................................................................................ www.ti.com

ELECTRICAL CHARACTERISTICS (continued)

At AVDD_5V = 5.0V, AVDD1 = AVDD2 = DVDD = 3.3V, LVDD = 1.8V, TGC mode I, single-ended input into LNA, ac-coupled

(1.0

µF), V

CNTL = 1.0V, fIN = 5MHz, Clock = 40MSPS, 50% duty cycle, LPF = 12.5MHz, internal reference mode, ISET = 56kΩ,

LVDS buffer setting = 3.5mA, and ambient temperature TA = +25°C, unless otherwise noted.

AFE5804

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

DYNAMIC PERFORMANCE

fIN = 2MHz; –1dBFS

59.7

dBFS

(VCNTL = 1.0V, PGA = 30dB)

Signal-to-noise ratio

SNR

fIN = 5MHz; –1dBFS

59.5

dBFS

fIN = 10MHz; –1dBFS

59.1

dBFS

fIN = 5MHz; –1dBFS

–45

dBFS

(VCNTL = 0.35V, PGA = 30dB)

fIN = 5MHz; –1dBFS

Second-harmonic distortion

HD2

–50

–70

dBFS

(VCNTL = 1V, PGA = 30dB)

fIN = 5MHz; –6dBFS

–61

–70

dBFS

(VCNTL = 1V, PGA = 20dB)

fIN = 5MHz; –1dBFS

–43

dBFS

(VCNTL = 0.35V, PGA = 30dB)

fIN = 5MHz; –1dBFS

Third-harmonic distortion

HD3

–43

–50

dBFS

(VCNTL = 1V, PGA = 30dB)

fIN = 5MHz; –6dBFS

–61

–70

dBFS

(VCNTL = 1V, PGA = 20dB)

f1 = 4.99MHz at –6dBFS,

Intermodulation distortion

IMD3

dBc

f2 = 5.01MHz at –32dBFS

Crosstalk

fIN ≤ 5MHz, VCNTL = 0.6V, –6dBFS

–67

dBc

CW—SIGNAL CHANNELS

Input voltage noise (CW)

RS = 0Ω, f = 2MHz

1.1

nV/

√Hz

Output noise correlation factor

Summing of eight channels

0.6

At VIN = 100mVPP

13.8

mA/V

Output transconductance (V/I)

At VIN = 270mVPP

12.2

mA/V

Dynamic CW output current, max

IOUTAC

2.9

mAPP

Static CW output current (sink)

IOUTDC

0.9

Output common-mode voltage(3)

VCM

2.5

Output impedance

Ω

Output capacitance

INTERNAL REFERENCE VOLTAGES (ADC)

Reference top

VREFT

0.5

Reference bottom

VREFB

2.5

VREFT – VREFB

1.95

2.05

Common-mode voltage (internal)

VCM

1.425

1.5

1.575

VCM output current

±2

(3)

CW outputs require an externally applied bias voltage of +2.5V.

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