LM98725 datasheet(10/145 Pages) TI1

Part #	LM98725

Description	3 Channel, 16-Bit, 81 MSPS Analog Front End

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Manufacturer	TI1 [Texas Instruments]

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LM98725

SNAS474H – APRIL 2009 – REVISED MARCH 2015

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Electrical Characteristics (continued)

The following specifications apply for VA = VD = VR = VC = 3.3 V, CL = 10 pF, and fINCLK = 27 MHz unless otherwise

specified. all other limits TA = 25°C.

(1)

PARAMETER

TEST CONDITIONS

MIN(2)

TYP(3)

MAX(2)

UNIT

ADC SPECIFICATIONS

VREFT

Top of Reference

2.07

V

VREFB

Bottom of Reference

0.89

V

VREFT -

V

Differential Reference Voltage

1.06

1.18

1.30

VREFB

Over range Output Code

65535

Under range Output Code

0

DIGITAL OFFSET “DAC” SPECIFICATIONS

Resolution

7

Bits

Digital Offset DAC LSB Step

Referred to AFE Output

LSB

32

Size

Min DAC Code =7'b0000000

–2048

Offset Adjustment Range

Mid DAC Code =7'b1000000

0

LSB

Referred to AFE Output

Max DAC Code = 7'b1111111

+2016

FULL CHANNEL PERFORMANCE SPECIFICATIONS

DNL

See (4)

+0.8/

LSB

Differential Non-Linearity

-0.999

2.5

–0.7

INL

See (4)

+18/

LSB

Integral Non-Linearity

–75

75

–25

–76

dB

Minimum PGA Gain(4)

LSB

10

26

RMS

SNR

Total Output Noise

–56

dB

Maximum PGA Gain(4)

LSB

96

RMS

Mode 3

26

Channel to Channel Crosstalk

LSB

Mode 2

17

(4)

This parameter ensured by design and characterization.

10

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