ADS7828

6

SBAS181C

www.ti.com

Rise Time of SDA Signal

tRDA

Standard Mode

1000

ns

Fast Mode

20 + 0.1CB

300

ns

High-Speed Mode, CB = 100pF max(2)

10

80

ns

High-Speed Mode, CB = 400pF max(2)

20

160

ns

Fall Time of SDA Signal

tFDA

Standard Mode

300

ns

Fast Mode

20 + 0.1CB

300

ns

High-Speed Mode, CB = 100pF max(2)

10

80

ns

High-Speed Mode, CB = 400pF max(2)

20

160

ns

Setup Time for STOP Condition

tSU; STO

Standard Mode

4.0

µs

Fast Mode

600

ns

High-Speed Mode

160

ns

Capacitive Load for SDA and SCL

CB

400

pF

Line

Pulse Width of Spike Suppressed

tSP

Fast Mode

50

ns

High-Speed Mode

10

ns

Noise Margin at the HIGH Level for

Standard Mode

Each Connected Device (Including

VNH

Fast Mode

0.2VDD

V

Hysteresis)

High-Speed Mode

Noise Margin at the LOW Level for

Standard Mode

Each Connected Device (Including

VNL

Fast Mode

0.1VDD

V

Hysteresis)

High-Speed Mode

NOTES: (1) All values referred to VIHMIN and VILMAX levels.

(2) For bus line loads CB between 100pF and 400pF the timing parameters must be linearly interpolated.

(3) A device must internally provide a data hold time to bridge the undefined part between VIH and VIL of the falling edge of the SCLH signal. An

input circuit with a threshold as low as possible for the falling edge of the SCLH signal minimizes this hold time.

TIMING CHARACTERISTICS(1) (Cont.)

At TA = –40°C to +85°C, +VDD = +2.7V, unless otherwise noted.

PARAMETER

SYMBOL

CONDITIONS

MIN

MAX

UNITS