MAX6972 datasheet(3/23 Pages) MAXIM

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16-Output PWM LED Drivers

for Message Boards

_______________________________________________________________________________________

Note 1: All parameters tested at TA = +85°C. Specifications over temperature are guaranteed by design.

Note 2: Specification limits apply to devices at the same TA for TA = TMIN to TMAX.

Note 3: Guaranteed by design.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Output Low Voltage MUX_

VOLM

ISINK = 40mA

0.4

Open-Circuit Detection

VOCD

200

Output Slew Time

Y0–Y7, Z0–Z7

80% to 20%, load = 50pF,

calibration DACs set to 0xFF

100

TA = +85°C

Full-Scale Port Output Current

Y0–Y7, Z0–Z7

ISINKFS

VDD = 3.3V, VO = 1.2V,

calibration DACs set to 0xFF

TA = TMIN to TMAX

52.5

58.0

TA = +125°C

(Note 3)

±0.5

±1.8

TA = +85°C

±0.5

±1.2

Port-to-Port Current Matching

Y0–Y7, Z0–Z7

∆ISINK

VDD = 3.3V, VO = 1.2V,

calibration DACs set to 0xFF

ISINK = 55mA (Note 2)

TA = -40°C

(Note 3)

±0.7

±2.3

Device-to-Device Current Matching

Y0–Y7, Z0–Z7

∆IAVG

VDD = 3.3V, VO = 1.2V, calibration DACs set to 0xFF,

ISINK = 55mA, TA = +85°C (Note 3)

±1

±2

TA = +85°C

31.0

35.5

Half-Scale Port Output Current

Y0–Y7, Z0–Z7

ISINKHS

VDD = 3.3V, VO = 1.2V,

calibration DACs set to 0x80

TA = TMIN to TMAX

30.0

36.5

TA = +85°C

0.3

1.15

Output Load Regulation

∆IOLR

VDD = 3.3V, VO = 1.2V to

3.0V, calibration DACs set to

0x80, ISINK = 33mA

TA = TMIN to TMAX

1.5

mA/V

TA = +85°C

0.6

1.7

Output Power-Supply Rejection

∆IOPSR

VDD = 3.0 V to 3.6V,

VO = 1.2V, calibration DACs

set to 0x80, ISINK = 33mA

TA = TMIN to TMAX

2.0

mA/V

ELECTRICAL CHARACTERISTICS (continued)

(VDD = 3.0V to 3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDD = 3.3V, TA = +85°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

CLKI_ Input Frequency

fCLKI

MHz

CLKI_ Duty Cycle

CLKO_ Output Delay

tPD-CLKO

DIN_ Setup Time

tSU-DIN

0.5

DIN_ Hold Time

tHD-DIN

5ns

DOUT_ Output Delay

tPD-DOUT

LOADO Output Delay

tPD-LOADO

LOADI Setup Time

tSU-LOADI

-3

LOADI Hold Time

tHD-LOADI

8ns

Watchdog Period

When enabled

125

300

TIMING CHARACTERISTICS

(VDD = 3.0V to 3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at 3.3V, TA = +85°C.) (Note 1)

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