ADC14X250 datasheet(7/69 Pages) TI1

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ADC14X250

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SLASE49 – DECEMBER 2015

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For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.

6.4 Thermal Information

THERMAL METRIC(1)

RHB (WQFN)

UNIT

(32 PINS)

RθJA

Thermal resistance, junction to ambient

31.4

°C/W

RθJC(top)

Thermal resistance, junction to package top

50.2

RθJC(bottom)

Thermal resistance, junction to package bottom

1.1

RθJB

Thermal resistance, junction to board

5.1

φJT

Characterization parameter, junction to package top

0.2

φJB

Characterization parameter, junction to board

5.1

6.5 Electrical Characteristics: Static Converter Performance

Unless otherwise noted, these specifications apply for VA3.0 = 3 V; VA1.8 = 1.8 V; VA1.2 = 1.2 V; FCLKIN = FS = 250 MSPS;

external differential resistive termination at ADC input is 66

Ω. Typical values are at TA = 25°C, unless otherwise noted. Limit

values specified for the temperature range TA-MIN = –40°C to TP-MAX = 105°C.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

RESOLUTION

Bit resolution of ADC core

Bits

FSR

Full scale range

Differential peak-to-peak

1.7

Vpp

GVAR

Gain variation

1-sigma variation of full scale range across multiple units

±0.05

VOFF

Input referred voltage offset

±3

DNL

Differential non-linearity

+0.27

–0.18

LSB

INL

Integral non-linearity

–0.9

LSB

6.6 Electrical Characteristics: Dynamic Converter Performance

Unless otherwise noted, these specifications apply for VA3.0 = 3 V; VA1.8 = 1.8 V; VA1.2 = 1.2 V; FCLKIN = FS = 250 MSPS;

external differential resistive termination at ADC input is 66

Ω. CLKIN± input is a 2 Vp-p differential sinusoid. Typical values

are at TA = 25°C, unless otherwise noted. Limit values specified for the temperature range TA-MIN = –40°C to TP-MAX = 105°C.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

BW3dB

3-dB bandwidth

Frequency at which the voltage input to digital output

response deviates by 3 dB compared to low frequencies for

a low impedance differential signal applied at the input pins.

Includes 0.5-nH parasitic inductance in series with each pin

of the differential analog input.

800

MHz

SNR

Signal-to-noise ratio, integrated across entire Nyquist

bandwidth

dBFS

Input = 10 MHz, –3 dBFS

71.1

Input = 70 MHz, –3 dBFS

70.9

Input = 170 MHz, –3 dBFS

70.5

Input = 240 MHz, –3 dBFS

68.3

70.1

Input = 240 MHz, –40 dBFS

71.1

Input = 300 MHz, –3 dBFS

69.7

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