LM98640CVAL datasheet(12/55 Pages) TI2

12 / 55 page

LM98640QML-SP

SNAS461G – MAY 2010 – REVISED NOVEMBER 2018

www.ti.com

Product Folder Links: LM98640QML-SP

Submit Documentation Feedback

LM98640QML-SP Electrical Characteristics

(1)(2) (continued)

The following specifications apply for VDD33 = 3.3 V, VDD18 = 1.8 V, CL = 10 pF, and fINCLK = 40 MHz unless otherwise

specified.

PARAMETER

TEST CONDITIONS

NOTES

SUB-

GROUPS

MIN TYP(3)

MAX UNIT

(4)

Dynamic Power Supply Rejection Ratio is performed by injecting a 200-mVpp sine wave ac coupled to the analog supply pin. The

LM98640QML-SP inputs are left floating in CDS mode and an FFT is captured. The spur ensured by the injected signal is recorded.

(5)

This parameter is ensured by design and/or characterization and is not tested.

PSRR

Dynamic Power Supply Rejection

Ratio

CDS Gain = 1x

PGA Gain = 1x

200 mVpp, 200 KHz

See(4)

–72.3

200 mVpp, 500 KHz

–72

200 mVpp, 1 MHz

–71

200 mVpp, 1.5 MHz

–68

200 mVpp, 2 MHz

–66

INTERNAL REFERENCE SPECIFICATIONS

VREFBG

Reference Voltage

See(5)

1.218

Reference Tolerance

(chip to chip)

See(5)

±2%

RREFBG

Reference Impedance

See(5)

kΩ

VREFTC

Temperature Coefficient

25°C to 125°C

ppm/

°C

–55°C to 25°C

INPUT SAMPLING CIRCUIT SPECIFICATIONS

VIN

Input Voltage Level

CDS Gain = 1x, PGA Gain =

1, 2, 3

Vp-p

CDS Gain = 2x, PGA Gain= 1

CDS Gain = 1x, PGA Gain =

0.7x

2.85

VRESET

Reset Feed Through

500

IIN_SH

Sample and Hold Mode

Input Leakage Current

CDS Gain = 1x

See(5)

384

μA

OSX = VDD33 (OSX = VSS)

CDS Gain = 2x

See(5)

–475

µA

OSX = VDD33 (OSX = VSS)

CSH

Sample/Hold Mode

CDS Gain = 1x

See(5)

Equivalent Input Capacitance

(see Figure 20)

CDS Gain = 2x

See(5)

IIN_CDS

CDS Mode

OSX = VDD33 (OSX = VSS)

See(5)

300

Input Leakage Current

RCLPIN

CLPIN Switch Resistance

See(5)

(OSX to VCLP Node in Figure 17)

LM98640CVAL Scheda tecnica(PDF) 12 Page - Texas Instruments

LM98640CVAL Scheda tecnica(HTML) 12 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55

Scheda tecnica Scarica

Link URL