MAX1180ECM+TD Maxim Integrated, MAX1180ECM+TD Datasheet - Page 11

• Manufacturer Part Number: MAX1180ECM+TD
• Description: Analog to Digital Converters - ADC
• Manufacturer: Maxim Integrated

Specifications of MAX1180ECM+TD

• Number Of Channels: 2
• Architecture: Pipeline
• Conversion Rate: 105 MSPs
• Resolution: 10 bit
• Input Type: Single-Ended/Differential
• Snr: 59 dB
• Interface Type: Parallel
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Package / Case: TQFP EP
• Maximum Power Dissipation: 511 mW
• Minimum Operating Temperature: - 40 C
• Number Of Converters: 2
• Voltage Reference: Internal, External

The normal watchdog timeout period (1.12s min)
begins after the first transition on WDI before the con-
clusion of the long initial watchdog period (Figure 2).
During the normal operating mode, the supervisor will
issue a reset pulse for the reset timeout period if the µP
does not update the WDI with a valid transition (high-to-
low or low-to-high) within the standard timeout period
(1.12s min).
Leave WDI unconnected to disable the watchdog timer.
The WDI unconnected-state detector uses a small
(200nA typ) current source. Therefore, do not connect
WDI to anything that will source more than 50nA.
PFI is the noninverting input to a comparator. If PFI is
less than V
for the power-fail comparator include monitoring prereg-
ulated input of the power supply (such as a battery) or
providing an early power-fail warning so software can
conduct an orderly system shutdown. It can also be
used to monitor supplies other than V
setting the power-fail threshold with a resistor-divider, as
shown in Figure 3. PFI is the input to the power-fail com-
parator. The typical comparator delay is 2µs from PFI to
PFO. Connect PFI to ground of V
Figure 2. Normal Watchdog Startup Sequence
WDI
V
RST
CC
PFI
(626.5mV), PFO goes low. Common uses
V
Dual/Triple, Ultra-Low-Voltage, SOT23 µP
TH
______________________________________________________________________________________
t
WDI-NORMAL
t
1.12s MAX
RP
t
WDI-STARTUP
35s MAX
Power-Fail Comparator
1.12s MAX
CC
1 if unused.
CC
1 or V
CC
2 by
The MAX6715A–MAX6729A/MAX6797A are guaranteed
to operate properly down to V
that require valid reset levels down to V
pulldown resistor at RST to ground. The resistor value
used is not critical, but it must be large enough not to
load the reset output when V
old. For most applications, 100kΩ is adequate. This con-
figuration does not work for the open-drain outputs of the
M A X 6 7 1 5 A / M A X 6 7 1 7 A / M A X 6 7 1 9 A / M A X 6 7 2 1 A /
MAX6723A/MAX6725A/MAX6727A/MAX6728A. For push-
pull, active-high RST output connect the external resistor
as a pullup from RST to V
Figure 3. Using Power-Fail Input to Monitor an Additional
Power-Supply a) V
V
V
V
CC
IN
IN
A)
B)
R1
R2
R1
R2
Supervisory Circuits
PFI
PFI
MAX6728A/
MAX6729A/
MAX6728A/
MAX6729A/
MAX6797A
MAX6797A
GND
GND
IN
Ensuring a Valid Reset Output
is Positive b) V
PFO
PFO
CC
1.
CC
CC
V
is above the reset thresh-
V
IN
PFI
TRIP
Down to V
= 0.8V. In applications
V
is Negative
= 626.5mV
TRIP
= R2 (V
= V
[
PFI
PFI
CC
(
)
R1 + R2
(
R2
R1
1
= 0V, use a
+
CC
)
R2
1
)
-
= 0V
V
R1
CC
11
]