MAX1154BEUE Maxim Integrated, MAX1154BEUE Datasheet - Page 19

• Manufacturer Part Number: MAX1154BEUE
• Description: Analog to Digital Converters - ADC
• Manufacturer: Maxim Integrated

Specifications of MAX1154BEUE

• Number Of Channels: 10
• Architecture: SAR
• Conversion Rate: 94 KSPs
• Resolution: 10 bit
• Input Type: Single-Ended/Differential
• Snr: Yes
• Interface Type: Serial
• Operating Supply Voltage: 4.5 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TSSOP-16
• Maximum Power Dissipation: 696 mW
• Minimum Operating Temperature: - 40 C
• Number Of Converters: 1
• Voltage Reference: Internal 4.096 V or External

The 8-bit setup register (Table 7) holds configuration
data common to all input channels. At power-up and
after a RESET command, this register defaults to
00000000b.
These 3 bits in the setup register (Table 8) set the wait
time between conversion scans. The following are
examples of how the MAX1153/MAX1154 begin a sam-
ple sequence (see the Setup Register: Reference
Selection Bits (B1/B0) section).
Operating in reference mode 00 (external reference for
voltage conversions, internal reference for temperature
conversions):
1) Convert the first-enabled channel. If this channel is
2) Sequence to the next-enabled channel until all
3) Wait the sample wait period.
4) Repeat the procedure.
Operating in reference mode 01 (internal reference for all
conversions, can be powered down between scans):
1) Power up the internal reference, if powered down
2) Convert the first-enabled channel, starting with the
Table 7. Setup Register Format
Table 8. Wait Time Encoding
with Internal Temperature Sensor and V
B7 (MSB)
a temperature measurement, power up the internal
reference (this takes 20µs for each enabled tem-
perature measurement in reference mode 00).
channels have been converted.
(this takes 40µs).
internal temperature sensor, if enabled.
Stand-Alone, 10-Channel, 10-Bit System Monitors
Setup Register: Sample Wait Bits (B7, B6, B5)
B7, B6, B5
000
001
010
011
100
101
110
111
Sample wait bits
B6
WAIT TIME (ms)
B5
Setup Register
312.000
19.600
78.200
0.080
0.395
1.310
4.970
0
Interrupt
active
B4
___________________________________________________
3) Sequence to the next-enabled channel until all
4) Wait the sample wait time, and enter internal refer-
5) Repeat the above steps.
Operating in reference mode 10 (internal reference for
all conversions, continuously powered up):
1) Convert the first-enabled channel.
2) Sequence to the next-enabled channel until all
3) Wait the sample wait time.
4) Repeat the procedure.
Use the sample wait feature to reduce supply current
when measuring slow-changing analog signals. This
power savings occurs when reference mode 00 or 01 is
used in combination with wait times longer than 80µs.
With reference mode 10 or wait times of less than 80µs,
the internal reference system remains powered up, mini-
mizing any power savings. See the Computing Data
Throughput section. Table 8 shows the B7, B6, B5 wait
time encoding.
Bits B3 and B4 in the setup register configure INT and
how it responds to an alarm event (see the Alarm
Register section). Table 9 shows the available INT
options.
Table 9. Interrupt Control
B4
B3
BIT FUNCTION
Interrupt
polarity
enabled channels have been converted.
ence power-down mode if this period is greater
than 80µs.
enabled channels have been converted.
B3
driver type
polarity
Output
Output
Setup Register: Interrupt Control (B4, B3)
STATE
mode
Scan
B2
BIT
1
0
1
0
Driven high or low at all times
High-Z when inactive, driven (high
or low) when active
Acti ve hi g h, i nactive = l ow or hi g h - Z
Acti ve l ow , i nacti ve = hi g h or hi g h - Z
Reference
source B1
DD
INT OPERATION
B1
Monitor
Reference
source B2
B0 (LSB)
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