ADS8900BRGET datasheet(7/76 Pages) TI1

Part #	ADS8900BRGET

Description	20-Bit, High-Speed SAR ADCs With Integrated Reference Buffer, Integrated LDO, and multiSPI Digital Interface

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Manufacturer	TI1 [Texas Instruments]

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ADS8900B, ADS8902B, ADS8904B

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Electrical Characteristics (continued)

At RVDD = 5.5 V, DVDD = 1.65 V to 3.6 V, VREF = 5 V, and maximum throughput (unless otherwise noted).

Minimum and maximum values at TA = –40°C to +125°C; typical values at TA = 25°C.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

(7)

For VIN = –0.1 dBFS.

(8)

See the PD_CNTL Register.

AC ACCURACY(2)(7) (CREFBUF = 22 µF, RESR = 1 Ω)

SINAD

Signal-to-noise + distortion

fIN = 2 kHz, TA = –40°C to +85°C

101.8

103.9

dB

fIN = 2 kHz, TA = –40°C to +125°C

101.3

103.9

SNR

Signal-to-noise ratio

fIN = 2 kHz, TA = –40°C to +85°C

102

104.5

dB

fIN = 2 kHz, TA = –40°C to +125°C

101.5

104.5

fIN = 100 kHz

99.5

THD

Total harmonic distortion

fIN = 2 kHz

–125

dB

fIN = 100 kHz

–110

SFDR

Spurious-free dynamic range

125

dB

LDO OUTPUT (DECAP)

VLDO

LDO output voltage

(DECAP pins)

2.85

V

CLDO

External ceramic capacitor on

DECAP pins

1

µF

tPU_LDO

LDO power-up time

CLDO = 1 µF, RVDD > VLDO

1

ms

ISHRT-LDO

Short-circuit current

100

mA

DIGITAL INPUTS

VIH

High-level input voltage

1.65 V < DVDD < 2.3 V

0.8 DVDD

DVDD + 0.3

V

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

V

2.3 V < DVDD < 3.6 V

–0.3

0.3 DVDD

Input current

±0.01

0.1

μA

DIGITAL OUTPUTS

VOH

High-level output voltage

IOH = 500-µA source

0.8 DVDD

DVDD

V

VOL

Low-level output voltage

IOH = 500-µA sink

0

0.2 DVDD

V

POWER SUPPLY

IRVDD

Analog supply current

ADS8900B at RVDD = 5 V, 1-MSPS

4.2

5.8

mA

ADS8902B at RVDD = 5 V, 500-KSPS

3.2

4

mA

ADS8904B at RVDD = 5 V, 250-KSPS

2.8

3.6

mA

Static, no conversion

970

μA

Static, PD_ADC = 1b(8)

900

μA

Static, PD_REFBUF = 1b(8)

120

μA

Static, PD_ADC = 1b and

PD_REFBUF = 1b(8)

40

μA

IDVDD

Digital supply current

DVDD = 3 V, CLOAD = 10 pF, no

conversion

1

μA

PRVDD

Power dissipation

ADS8900B at RVDD = 5 V, 1-MSPS

21

29

mW

ADS8902B at RVDD = 5 V, 500-KSPS

16

20

ADS8904B at RVDD = 5 V, 250-KSPS

14

18

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