ADC3421 datasheet(6/80 Pages) TI2

6 / 80 page

ADC3421, ADC3422, ADC3423, ADC3424

SBAS673A – JULY 2014 – REVISED OCTOBER 2015

www.ti.com

7.4 Thermal Information

ADC342x

THERMAL METRIC(1)

RTQ (VQFN)

UNIT

56 PINS

RθJA

Junction-to-ambient thermal resistance

25.3

°C/W

RθJC(top)

Junction-to-case (top) thermal resistance

9.5

°C/W

RθJB

Junction-to-board thermal resistance

3.4

°C/W

ψJT

Junction-to-top characterization parameter

0.2

°C/W

ψJB

Junction-to-board characterization parameter

3.3

°C/W

RθJC(bot)

Junction-to-case (bottom) thermal resistance

0.5

°C/W

(1)

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

7.5 Electrical Characteristics: General

Typical values are over the operating free-air temperature range, at TA = 25°C, full temperature range is TMIN = –40°C to TMAX

= 85°C, maximum sampling rate, 50% clock duty cycle, AVDD = DVDD = 1.8 V, and –1-dBFS differential input, unless

otherwise noted.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ANALOG INPUT

Differential input full-scale

2.0

VPP

Input resistance

Differential at dc

6.6

Input capacitance

Differential at dc

3.7

VOC(VCM)

VCM common-mode voltage output

0.95

VCM output current capability

Input common-mode current

Per analog input pin

1.5

µA/MSPS

50-

Ω differential source driving 50-Ω termination

Analog input bandwidth (3 dB)

540

MHz

across INP and INM

DC ACCURACY

Offset error

–25

αEO

Temperature coefficient of offset error

± 0.024

mV/°C

Gain error as a result of internal

EG(REF)

–2

%FS

reference inaccuracy alone

EG(CHAN)

Gain error of channel alone

–2

%FS

α(EGCHAN)

Temperature coefficient of EG(CHAN)

±0.008

Δ%FS/Ch

CHANNEL-TO-CHANNEL ISOLATION

Near channel

105

fIN = 10 MHz

Far channel

105

Near channel

fIN = 100 MHz

Far channel

105

Near channel

Crosstalk(1)

fIN = 200 MHz

Far channel

105

Near channel

fIN = 230 MHz

Far channel

105

Near channel

fIN = 300 MHz

Far channel

105

(1)

Crosstalk is measured with a –1-dBFS input signal on the aggressor channel and no input on the victim channel.

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