MAX1361MEUB-T Maxim Integrated, MAX1361MEUB-T Datasheet - Page 21

• Manufacturer Part Number: MAX1361MEUB-T
• Description: Analog to Digital Converters - ADC
• Manufacturer: Maxim Integrated

Specifications of MAX1361MEUB-T

• Number Of Channels: 4/2
• Architecture: SAR
• Conversion Rate: 150 KSPs
• Resolution: 10 bit
• Input Type: Single-Ended/Differential
• Snr: Yes
• Interface Type: Serial (2-Wire, I2C, SMBus)
• Operating Supply Voltage: 2.7 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Package / Case: uMAX
• Maximum Power Dissipation: 689.7 mW
• Minimum Operating Temperature: - 40 C
• Number Of Converters: 1
• Voltage Reference: Internal 4.096 V or External

Reset alarms by writing to monitor-setup data. See the
Configuring Monitor Mode section and Table 10.
The SMBus-alert feature provides a quick method to
identify alarming devices on a shared interrupt. Upon
receiving an interrupt signal, the host µC can broadcast
a receive byte request to the alert-response slave
address (0001100). Any slave device that generated an
interrupt attempts to identify itself by putting its own
address on the bus. The alert response can activate
several different slave devices simultaneously. If more
than one slave attempts to respond, bus arbitration
rules apply, and the device with the lower address wins
as a consequence of the open-collector bus. The losing
device does not generate an acknowledgement and
continues to hold the alert line low until serviced.
Successful reading of the alert response address de-
asserts INT.
The MAX1361/MAX1362 resume monitoring after clean-
ing an alarm-status register. INT may immediately re-
assert if a fault is still present, or if the alarm register
has not been thoroughly cleared.
Output data coding for the MAX1361/MAX1362 is bina-
ry in unipolar mode and two’s complement in bipolar
mode with 1 LSB = V
bits. Code transitions occur halfway between succes-
Figure 14. Unipolar Transfer Function
4-Channel, 10-Bit, System Monitor with Programmable
111...111
111...110
100...010
100...001
100...000
011...111
011...110
011...101
000...001
000...000
OUTPUT CODE
(GND)
1 LSB =
FS = REF + GND
ZS = GND
0
1
______________________________________________________________________________________
1024
V
REF
REF
INPUT VOLTAGE (LSB)
/2
N
, where N is the number of
512
Trip Window and SMBus Alert Response
Transfer Functions
Resetting Alarm
FULL-SCALE
TRANSITION
SMBus Alert
FS - 0.5 LSB
sive-integer LSB values. Figures 14 and 15 show the
transfer functions for unipolar and bipolar operations,
respectively.
Only use PC boards. Wire-wrap configurations are not
recommended since the layout should ensure proper
separation of analog and digital traces. Do not run ana-
log and digital lines parallel to each other, and do not
layout digital signal paths underneath the ADC pack-
age. Use separate analog and digital PC board ground
sections with only one star point (Figure 16).
High-frequency noise in the power supply (V
influence the proper operation of the ADC’s fast com-
parator. Bypass V
two parallel capacitors, 0.1µF and 4.7µF, located as
close as possible to the MAX1361/MAX1362 power sup-
ply. Minimize capacitor lead length for best supply noise
rejection. For extremely noisy supplies, add an attenua-
tion resistor (5Ω) in series with the power supply.
Integral nonlinearity (INL) is the deviation of the values
on an actual transfer function from a straight line. This
straight line can be either a best straight-line fit or a line
drawn between the endpoints of the transfer function,
once offset and gain errors have been nullified. The
Figure 15. Bipolar Transfer Function
011...111
011...110
000...010
000...001
000...000
111...111
111...110
111...101
100...001
100...000
OUTPUT CODE
AIN- ≥
Layout, Grounding, and Bypassing
-FS + 0.5 LSB
-FS =
ZS = AIN-
1 LSB =
FS =
V
REF
2
V
-V
DD
REF
2
REF
2
1024
V
REF
+ AIN-
to the star ground with a network of
+ AIN-
INPUT VOLTAGE (LSB)
Integral Nonlinearity
AIN-
Definitions
+FS - 1 LSB
DD
) could
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