ADS1283IRHFR.B datasheet(6/67 Pages) TI2

6 / 67 page

ADS1283

SBAS565C – JANUARY 2014 – REVISED AUGUST 2019

www.ti.com

Product Folder Links: ADS1283

Submit Documentation Feedback

(1)

For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application

report.

6.4 Thermal Information

THERMAL METRIC(1)

ADS1283

UNIT

RHF (VQFN)

24 PINS

RθJA

Junction-to-ambient thermal resistance

30.2

°C/W

RθJC(top)

Junction-to-case (top) thermal resistance

27.5

°C/W

RθJB

Junction-to-board thermal resistance

8.5

°C/W

ψJT

Junction-to-top characterization parameter

0.3

°C/W

ψJB

Junction-to-board characterization parameter

8.6

°C/W

RθJC(bot)

Junction-to-case (bottom) thermal resistance

1.7

°C/W

(1)

PGA chop feature is disabled by setting CHOP bit = '0'. See Table 4

(2)

Inputs shorted; see Table 1.

(3)

Input signal = 31.25 Hz, –0.5 dBFS.

6.5 Electrical Characteristics

maximum and minimum specifications over –40°C to +85°C; typical specifications at 25°C, AVDD = 2.5 V, AVSS = –2.5 V,

fCLK = 4.096 MHz, VREFP = 2.5 V, VREFN = –2.5 V, DVDD = 3.3 V, PGA = 1, OFFSET bit = 1 (enabled), CHOP bit = 1

(enabled), and fDATA = 1000 SPS (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ANALOG INPUTS

PGA input voltage noise density

nV/

√Hz

Differential input impedance(1)

CHOP enabled

Ω

CHOP disabled

100

Common-mode input impedance

Ω

IIB

Input bias current

Crosstalk

f = 31.25 Hz

–135

Mux switch on-resistance

Each switch

Ω

PGA OUTPUT (CAPP, CAPN)

Absolute output range

AVSS + 0.4

AVDD – 0.4

PGA differential output impedance

600

Ω

Output impedance tolerance

±10%

External bypass capacitance

100

Modulator differential input impedance

Ω

AC PERFORMANCE

SNR

Signal-to-noise ratio(2)

120

124

THD

Total harmonic distortion(3)

ADS1283,

ADS1283B

PGA =

1, 2, 4, 8, 16

–122

–114

PGA = 32

–117

–110

PGA = 64

–114

ADS1283A

PGA = 1, 4, 16

–118

–106

SFDR

Spurious-free dynamic range

123

ADS1283IRHFR.B Datasheet(PDF) 6 Page - Texas Instruments

ADS1283IRHFR.B Datasheet(HTML) 6 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 56 57 58 59 60 61 62 63 64 65 66 67

Datasheet Download

Link URL