AFE8405 datasheet(6/152 Pages) TI

6 / 152 page

3.6

ANALOG ELECTRICAL CHARACTERISTICS

AFE8405

14-BIT, 85-MSPS, SINGLE-ADC, 8-CHANNEL WIDEBAND RECEIVER

SLWS212 – OCTOBER 2008

www.ti.com

Typical values at TA = 25°C, minimum and maximum values over temperature range of TA = –40°C to 85°C, sampling rate =

80 MSPS, 50% clock duty cycle, AVDD = DRVDD = 3.3 V, –1-dBFS differential input, internal reference, and 3-VPP

differential clock (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Resolution

Bits

Analog Inputs

VID

Differential input voltage range

2.3

VPP

CID

Differential input capacitance

3.2

IIC

Common-mode input current

2 mA per input, 4 mA total

Analog input bandwidth

Source impedance = 50

Ω

750

MHz

Conversion Characteristics

frxclk = 1 × fADC ch_rate_sel = rate_sel =

frxclk = 2 × fADC ch_rate_sel = rate_sel =

fADC

ADC clock rate (fclkpa = fclkma = fADC)

MSPS

frxclk = 4 × fADC ch_rate_sel = rate_sel =

frxclk = 8 × fADC ch_rate_sel = rate_sel =

Data latency – ADC input to FIFO input

16.5

Clock

Cycles

Internal Reference Voltages

refma

Lower reference voltages

refpa

Upper reference voltages

2.15

Reference error

±3.5

% of FS

cma

1.55

Common-mode output voltages

±0.05

Dynamic DC Characteristics and Accuracy

No missing codes

tested

DNL

Differential linearity error

fin = 1 MHz

±0.65

LSBs

INL

Integral linearity error

fin = 1 MHz

±4

LSBs

Offset error

±4

Offset temperature coefficient

µV/°C

Gain error

±0.5

% of FS

Gain temperature coefficient

0.0015

Δ%/

°C

Dynamic AC Characteristics

fin = 10 MHz, TA = 25°C

74.5

fin = 30 MHz

fin = 50 MHz

73.5

fin = 70 MHz, TA = 25°C

73.5

SNR

Signal-to-noise ratio

fin = 70 MHz, TA =25°C to 85°C

dBFS

fin = 70 MHz, TA –40°C

fin = 130 MHz

71.5

fin = 170 MHz

70.5

fin = 230 MHz

RMS output noise

INPA and INMA tied to CMA

1.1

LSBs

SPECIFICATIONS

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