MAX9921 Maxim Integrated Products, MAX9921 Datasheet - Page 3

• Manufacturer Part Number: MAX9921
• Description: 2-Wire Hall-Effect Sensor Interface
• Manufacturer: Maxim Integrated Products

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DC ELECTRICAL CHARACTERISTICS (continued)
(V
to +125°C, unless otherwise noted. Typical values are at T
AC TIMING CHARACTERISTICS
(V
to +125°C, unless otherwise noted. Typical values are at T
Note 1: All DC specifications are 100% tested at T
Note 2: C
Note 3: These blanking times apply when the MAX9921 is operating in normal mode. Blanking times following power-up or startup
LOGIC I/O (OUT1, OUT2, ERR, DIAG, and OE)
Output Voltage Low (ERR, OUT1,
OUT2)
Three-State Output Current (ERR,
OUT1, OUT2)
Input-Voltage High (DIAG, OE)
Input-Voltage Low (DIAG, OE)
Input Resistance to GND (DIAG,
OE)
IN1, IN2 Blanking Time at Hall
Switch Power-Up
IN1, IN2 Current Ramp Rate
After Turn-On
Delay from IN_ to OUT_ (Filter
Delay)
Delay from IN_ Fault to ERR
Delay from DIAG High to
OUT_ and ERR
Delay from DIAG Low to OUT_
and ERR
Delay Difference Between
Rising and Falling Edges for
Both Channels
Delay Difference Between
Channels
Maximum Frequency on Hall
Inputs
IN_ Pulse Length Rejected by
Filter to OUT_
BAT
BAT
= 13.6V, V
= 13.6V, V
anteed by design.
from shutdown mode are 20µs longer.
PARAMETER
L
PARAMETER
is external load capacitance on the outputs for test only.
DIAG
DIAG
Dual, 2-Wire Hall-Effect Sensor Interface
_______________________________________________________________________________________
= 0V, V
= 0V, V
OE
OE
= 5V, IN1 = IN2 = no connection, R
= 5V, IN1 = IN2 = no connection, R
SYMBOL
t
RAMP
f
SYMBOL
t
t
t
t
t
MAX
t
ERR
DLH
DHL
t
DEL
P
DM
CC
BL
R
V
R
I
V
V
OZ
OL
IH
IL
IN
I
500mV until OUT_ high, C
V
From I
Figure 1
From I
only, C
Rising edge of DIAG to falling or rising edge
of outputs, C
Falling edge of DIAG to falling or rising edge
of outputs, C
C
I
C
I
C
I
Figure 2
IH
IL
IL
IL
IN
HALL-BYPASS
HALL-BYPASS
HALL-BYPASS
Sink current = 1mA
V
= -7.2mA, C
= -7.2mA, C
= -7.2mA, C
A
OE
= -11.5mA to GND, time from V
= GND
= +25°C. AC specifications and specifications over -40°C to +125°C are guar-
IH
IL
= 0V, 0 ≤ V
L
to I
= 20pF, Figure 1
to I
A
A
SC
= +25°C.) (Note 1)
= +25°C.) (Notes 1 and 2)
IL
L
L
or from I
= 20pF, Figure 1
= 20pF, Figure 1
or from I
= 0.01µF, I
L
= 0.01µF, I
L
= 0.01µF, I
L
CONDITIONS
= 20pF
= 20pF
= 20pF
CONDITIONS
OUT_
ISET
ISET
IL
≤ 5V
IH
= 63.4kΩ, R
= 63.4kΩ, R
to I
to I
L
IH
IH
IH
= 20pF (Note 3)
IH
= -11.5mA and
= -11.5mA and
= -11.5mA and
OC,
, C
L
falling edge
IN_
= 20pF,
PU
PU
=
with Diagnostics
= 10kΩ at ERR, OUT1 and OUT2, T
= 10kΩ at ERR, OUT1 and OUT2, T
MIN
MIN
2.1
50
50
50
TYP
TYP
350
100
3.8
6.5
1.6
5.5
80
31
20
MAX
MAX
140
0.4
0.8
±1
A
A
UNITS
UNITS
mA/µs
= -40°C
= -40°C
kHz
kΩ
µA
µs
µs
ns
ns
µs
ns
ns
µs
V
V
V
3