REF5045 datasheet(9/62 Pages) TI2

9 / 62 page

ADS8881

www.ti.com

SBAS547D – MAY 2013 – REVISED AUGUST 2015

Product Folder Links: ADS8881

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Electrical Characteristics (continued)

All minimum and maximum specifications are at AVDD = 3 V, DVDD = 3 V, VREF = 5 V, VCM = VREF / 2 V,

and fSAMPLE = 1 MSPS, over the operating free-air temperature range, unless otherwise noted.

Typical specifications are at TA = 25°C, AVDD = 3 V, and DVDD = 3 V.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

(6)

All specifications expressed in decibels (dB) refer to the full-scale input (FSR) and are tested with an input signal 0.5 dB below full-scale,

unless otherwise specified.

(7)

Calculated on the first nine harmonics of the input frequency.

(8)

The device automatically enters a power-down state at the end of every conversion, and remains in power-down during the acquisition

phase.

DYNAMIC CHARACTERISTICS

SINAD

Signal-to-noise + distortion(6)

At 1 kHz, VREF = 5 V

99.9

At 10 kHz, VREF = 5 V

98.7

At 100 kHz, VREF = 5 V

93.3

SNR

Signal-to-noise ratio(6)

At 1 kHz, VREF = 5 V

98.5

100

At 10 kHz, VREF = 5 V

99.5

At 100 kHz, VREF = 5 V

93.5

THD

Total harmonic distortion(6)(7)

At 1 kHz, VREF = 5 V

–115

At 10 kHz, VREF = 5 V

–112

At 100 kHz, VREF = 5 V

–102

SFDR

Spurious-free dynamic

range(6)

At 1 kHz, VREF = 5 V

115

At 10 kHz, VREF = 5 V

112

At 100 kHz, VREF = 5 V

102

BW–3dB

–3-dB small-signal bandwidth

MHz

POWER-SUPPLY REQUIREMENTS

Power-supply

voltage

AVDD

Analog supply

2.7

3.6

DVDD

Digital supply range for SCLK > 40 MHz

2.7

3.6

Digital supply range for SCLK < 40 MHz

1.65

1.8

3.6

Supply current

AVDD

1-MHz sample rate, AVDD = 3 V

1.8

2.4

PVA

Power dissipation

1-MHz sample rate, AVDD = 3 V

5.5

7.2

100-kHz sample rate, AVDD = 3 V

0.55

10-kHz sample rate, AVDD = 3 V

μW

IAPD

Device power-down

current(8)

DIGITAL INPUTS: LOGIC FAMILY (CMOS)

VIH

High-level input voltage

1.65 V < DVDD < 2.3 V

0.8 × DVDD

DVDD + 0.3

2.3 V < DVDD < 3.6 V

0.7 × DVDD

DVDD + 0.3

VIL

Low-level input voltage

1.65 V < DVDD < 2.3 V

–0.3

0.2 × DVDD

2.3 V < DVDD < 3.6 V

–0.3

0.3 × DVDD

ILK

Digital input leakage current

±10

±100

DIGITAL OUTPUTS: LOGIC FAMILY (CMOS)

VOH

High-level output voltage

IO = 500-μA source, CLOAD = 20 pF

0.8 × DVDD

DVDD

VOL

Low-level output voltage

IO = 500-μA sink, CLOAD = 20 pF

0.2 × DVDD

TEMPERATURE RANGE

Operating free-air

temperature

ADS8881C

°C

ADS8881I

–40

REF5045 Datasheet(PDF) 9 Page - Texas Instruments

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