Rainbow-electronics MAX6973 Bedienungsanleitung PDF herunterladen (Seite 3)

MAX6972/MAX6973

16-Output PWM LED Drivers

for Message Boards

_______________________________________________________________________________________ 3

Note 1: All parameters tested at T

= +85°C. Specifications over temperature are guaranteed by design.

Note 2: Specification limits apply to devices at the same T

for T

= T

MIN

to T

MAX

Note 3: Guaranteed by design.

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

UNITS

Output Low Voltage MUX_ V

OLM

SINK

= 40mA

0.4

Open-Circuit Detection V

OCD

200

Output Slew Time

Y0–Y7, Z0–Z7

80% to 20%, load = 50pF,

calibration DACs set to 0xFF

100

= +85°C 54

55 56

Full-Scale Port Output Current

Y0–Y7, Z0–Z7

SINKFS

= 3.3V, V

= 1.2V,

calibration DACs set to 0xFF

= T

MIN

to T

MAX

52.5 55 58.0

= +125°C

(Note 3)

±0.5 ±1.8

= +85°C

±0.5 ±1.2

Port-to-Port Current Matching

Y0–Y7, Z0–Z7

∆I

SINK

= 3.3V, V

= 1.2V,

calibration DACs set to 0xFF

SINK

= 55mA (Note 2)

= -40°C

(Note 3)

±0.7 ±2.3

D evi ce- to- D evi ce C ur r ent M atchi ng

Y0–Y7, Z0–Z7

∆I

AVG

D D

= 3.3V , V

= 1.2V , cal i b r ati on D AC s set to 0xFF,

SINK

= 55mA, T

= +85°C (Note 3)

±1 ±2

= +85°C

31.0 33 35.5

Half-Scale Port Output Current

Y0–Y7, Z0–Z7

SINKHS

= 3.3V, V

= 1.2V,

calibration DACs set to 0x80

= T

MIN

to T

MAX

30.0 33 36.5

= +85°C

0.3 1.15

Output Load Regulation ∆I

OLR

D D

= 3.3V , V

= 1.2V to

3.0V , calibration DACs set to

0x80, I

SINK

= 33mA

= T

MIN

to T

MAX

1.5

mA/V

= +85°C

0.6 1.7

Output Power-Supply Rejection

∆I

OPSR

D D

= 3.0 V to 3.6V ,

= 1.2V , calibration DACs

set to 0x80, I

SINK

= 33mA

= T

MIN

to T

MAX

2.0

mA/V

ELECTRICAL CHARACTERISTICS (continued)

= 3.0V to 3.6V, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at V

= 3.3V, T

= +85°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

UNITS

CLKI_ Input Frequency f

CLKI

MHz

CLKI_ Duty Cycle 40

CLKO_ Output Delay

PD-CLKO

DIN_ Setup Time

SU-DIN

0.5

DIN_ Hold Time

HD-DIN

5ns

DOUT_ Output Delay

PD-DOUT

LOADO Output Delay

PD-LOADO

LOADI Setup Time

SU-LOADI

-3 ns

LOADI Hold Time

HD-LOADI

8ns

Watchdog Period When enabled 40

125 300

TIMING CHARACTERISTICS

= 3.0V to 3.6V, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at 3.3V, T

= +85°C.) (Note 1)

1 2 3 4 5 6 7 8 ... 22 23

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