MAX1363EUB-T Maxim Integrated, MAX1363EUB-T Datasheet - Page 15

• Manufacturer Part Number: MAX1363EUB-T
• Description: Analog to Digital Converters - ADC
• Manufacturer: Maxim Integrated

Specifications of MAX1363EUB-T

• Number Of Channels: 4/2
• Architecture: SAR
• Conversion Rate: 133 KSPs
• Resolution: 12 bit
• Input Type: Single-Ended/Differential
• Snr: Yes
• Interface Type: I2C, Serial
• Operating Supply Voltage: 2.7 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: uMAX
• Maximum Power Dissipation: 444.4 mW
• Minimum Operating Temperature: - 40 C
• Number Of Converters: 1
• Voltage Reference: 4.096 V

A write cycle begins with the bus master issuing a
START condition followed by 7 address bits and a write
bit (R/W = 0). If the address byte is successfully
received, the MAX1363/MAX1364 (slave) issue an ACK.
The master then writes to the slave. If the most signifi-
cant bit (MSB) is 1, the slave recognizes the received
byte as the setup byte (Table 4). If the MSB is 0, the
slave recognizes that byte as the configuration byte
(Table 2). Write to the configuration byte before writing
to the setup byte (Figure 8). If enabling RESET in the
setup byte, rewrite the configuration byte after writing
the setup byte, since RESET clears the contents of the
configuration byte back to the power-up state.
When the monitor-setup bit of the setup byte is set to 1,
writing extends up to 13 bytes to clock in monitor-setup
data. Terminate writing monitor-setup data at any time
by issuing a STOP or repeated START condition. If the
slave receives a byte successfully, it issues an ACK
(Figure 9).
Note: When operating in HS mode, a STOP condition
returns the bus into F/S mode (see the HS I
section).
AutoShutdown occurs between conversions when the
MAX1363/MAX1364 are idle. When operating in exter-
nal clock mode, issue a STOP, NACK, or repeated
START condition to place the devices in idle mode and
benefit from automatic shutdown. A STOP condition is
not necessary in internal clock mode for automatic
shutdown because power-down occurs once all con-
tents are written memory. Shutdown reduces supply
current to less than 0.5µA (external reference mode,
typ) and 300µA (internal reference mode, typ).
When idle, the MAX1363/MAX1364 continuously wait
for a START condition followed by their slave address.
Upon reading a valid address byte, the MAX1363/
MAX1364 power up. The internal reference requires
Table 3. Reference Voltage and AIN3/REF Format
4-Channel, 12-Bit System Monitors with Programmable
SEL1
Configuration/Setup Bytes (Write Cycle)
0
0
1
1
1
1
SEL0
0
1
0
0
1
1
______________________________________________________________________________________
Software Description
POWER-DOWN
INT REF
Automatic Shutdown
X
X
0
1
0
1
Trip Window and SMBus Alert Response
REFERENCE VOLTAGE
2
C Mode
External reference
Internal reference
Internal reference
Internal reference
Internal reference
V
DD
10ms to wake up. Therefore, power up the internal ref-
erence 10ms prior to conversion or leave the reference
continuously powered. Wake-up is transparent when
using an external reference or V
Automatic shutdown results in dramatic power savings,
particularly at slow conversion rates with internal clock.
For example, using an external reference at a conver-
sion rate of 10ksps, the average supply current for the
MAX1363 is 60µA (typ) and drops to 6µA (typ) at
1ksps. At 0.1ksps, the average supply current is just
1µA. Table 3 shows AIN3/REF configuration and refer-
ence power-down state.
SCAN1 and SCAN0 of the configuration byte set the
scan-mode configuration. When configuring AIN3/REF
for reference input or output (SEL0 = 1), AIN3/REF is
excluded from a multichannel scan. The scanned
results write to memory in the same order as the con-
version. Start a conversion sequence by initiating a
read with the desired scan mode. Read the results from
memory in the order they were converted (see the
Reading a Conversion (Read Cycle) section).
Selecting channel scan mode [0,0] starts converting
from channel 0 up to the channel chosen by CS1, CS0.
Selecting channel scan mode [0,1] converts the chan-
nel selected by CS1, CS0 eight times and returns eight
consecutive results.
Selecting monitor mode [1,0] initiates a continuous con-
version scan sequence from channel 0 to the channel
selected by CS1, CS0. See the Monitor Mode section
for more details.
Selecting channel scan mode [1,1] performs a single
conversion on the channel selected by CS1, CS0 and
returns the result.
Initiate a read cycle to start a conversion sequence and
to obtain conversion results. See the Scan Modes
section for details on the channel-scan sequence. Read
Reading a Conversion (Read Cycle)
Reference output
Reference output
Reference input
Analog input
Analog input
Analog input
AIN3/REF
DD
REFERENCE STATE
as the reference.
INTERNAL
Always off
Always off
Always off
Always on
Always off
Always on
Scan Modes
15