Electrical characteristics (continued), Timing characteristics – Rainbow Electronics MAX6973 User Manual
Page 3
MAX6972/MAX6973
16-Output PWM LED Drivers
for Message Boards
_______________________________________________________________________________________
3
Note 1: All parameters tested at T
A
= +85°C. Specifications over temperature are guaranteed by design.
Note 2: Specification limits apply to devices at the same T
A
for T
A
= T
MIN
to T
MAX
.
Note 3: Guaranteed by design.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Output Low Voltage MUX_
V
OLM
I
SINK
= 40mA
0.4
V
Open-Circuit Detection
V
OCD
200
mV
Output Slew Time
Y0–Y7, Z0–Z7
80% to 20%, load = 50pF,
calibration DACs set to 0xFF
100
ns
T
A
= +85°C
54
55
56
Full-Scale Port Output Current
Y0–Y7, Z0–Z7
I
SINKFS
V
DD
= 3.3V, V
O
= 1.2V,
calibration DACs set to 0xFF
T
A
= T
MIN
to T
MAX
52.5
55
58.0
mA
T
A
= +125°C
(Note 3)
±0.5
±1.8
T
A
= +85°C
±0.5
±1.2
Port-to-Port Current Matching
Y0–Y7, Z0–Z7
∆I
SINK
V
DD
= 3.3V, V
O
= 1.2V,
calibration DACs set to 0xFF
I
SINK
= 55mA (Note 2)
T
A
= -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
V
D D
= 3.3V , V
O
= 1.2V , cal i b r ati on D AC s set to 0xFF,
I
SINK
= 55mA, T
A
= +85°C (Note 3)
±1
±2
%
T
A
= +85°C
31.0
33
35.5
Half-Scale Port Output Current
Y0–Y7, Z0–Z7
I
SINKHS
V
DD
= 3.3V, V
O
= 1.2V,
calibration DACs set to 0x80
T
A
= T
MIN
to T
MAX
30.0
33
36.5
mA
T
A
= +85°C
0.3
1.15
Output Load Regulation
∆I
OLR
V
D D
= 3.3V , V
O
= 1.2V to
3.0V , calibration DACs set to
0x80, I
SINK
= 33mA
T
A
= T
MIN
to T
MAX
1.5
mA/V
T
A
= +85°C
0.6
1.7
Output Power-Supply Rejection
∆I
OPSR
V
D D
= 3.0 V to 3.6V ,
V
O
= 1.2V , calibration DACs
set to 0x80, I
SINK
= 33mA
T
A
= T
MIN
to T
MAX
2.0
mA/V
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 3.0V to 3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
DD
= 3.3V, T
A
= +85°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CLKI_ Input Frequency
f
CLKI
33
MHz
CLKI_ Duty Cycle
40
60
%
CLKO_ Output Delay
t
PD-CLKO
16
ns
DIN_ Setup Time
t
SU-DIN
0.5
ns
DIN_ Hold Time
t
HD-DIN
5
ns
DOUT_ Output Delay
t
PD-DOUT
15
ns
LOADO Output Delay
t
PD-LOADO
18
ns
LOADI Setup Time
t
SU-LOADI
-3
ns
LOADI Hold Time
t
HD-LOADI
8
ns
Watchdog Period
When enabled
40
125
300
ms
TIMING CHARACTERISTICS
(V
DD
= 3.0V to 3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at 3.3V, T
A
= +85°C.) (Note 1)