ADS5521 datasheet(3/36 Pages) TI1

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RECOMMENDED OPERATING CONDITIONS

ELECTRICAL CHARACTERISTICS

ADS5521

www.ti.com ...................................................................................................................................................... SBAS309D – MAY 2004 – REVISED OCTOBER 2008

PARAMETER

MIN

TYP

MAX

UNIT

Supplies

Analog supply voltage, AVDD

3.3

3.6

Output driver supply voltage, DRVDD

3.3

3.6

Analog input

Differential input range

2.3

VPP

Input common-mode voltage, VCM

(1)

1.45

1.55

1.65

Digital Output

Maximum output load

Clock Input

DLL ON

105

ADCLK input sample rate (sine wave) 1/tC

MSPS

DLL OFF

Clock amplitude, sine wave, differential(2)

VPP

Clock duty cycle(3)

50%

Open free-air temperature range

–40

°C

(1)

Input common-mode should be connected to CM.

(2)

See Figure 49 for more information.

(3)

See Figure 48 for more information.

Typical values given at TA = 25°C, min and max specified over the full recommended operating temperature range, AVDD =

DRVDD = 3.3 V, sampling rate = 105MSPS, 50% clock duty cycle, DLL On, 3-VPP differential clock, and –1dBFS differential

input, unless otherwise noted

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

Resolution

Bits

Analog Inputs

Differential input range

2.3

VPP

Differential input impedance

See Figure 39

6.6

Ω

Differential input capacitance

See Figure 39

Analog input common-mode current

250

µA

(per input)

Analog input bandwidth

Source impedance = 50

Ω

750

MHz

Clock

Voltage overload recovery time

cycles

Internal Reference Voltages

Reference bottom voltage, VREFM

Reference top voltage, VREFP

2.15

Reference error

–4%

±0.9%

1.55

Common-mode voltage output, VCM

±0.05

Dynamic DC Characteristics and Accuracy

No missing codes

Tested

Differential nonlinearity error, DNL

fIN = 55 MHz

–0.5

±0.25

+0.5

LSB

Integral nonlinearity error, INL

fIN = 55 MHz

–1.5

±0.5

+1.5

LSB

Offset error

–11

±1.5

Offset temperature coefficient

0.02

mV/°C

Δoffset error/ΔAVDD from AVDD = 3 V to

DC power-supply rejection ratio, DC PSRR

0.25

mV/V

AVDD = 3.6 V

Gain error (1)

–2

±0.3

%FS

Gain temperature coefficient

–0.02

Δ%/°C

(1)

Gain error is specified by design and characterization; it is not tested in production.

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