参数资料
型号: MAX1364MEUB+T
厂商: Maxim Integrated Products
文件页数: 7/25页
文件大小: 0K
描述: IC SYSTEM MON 12BIT 4CH 10-UMAX
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
位数: 12
采样率(每秒): 133k
数据接口: I²C,串行
转换器数目: 1
功率耗散(最大): 444.4mW
电压电源: 单电源
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 10-TFSOP,10-MSOP(0.118",3.00mm 宽)
供应商设备封装: 10-µMAX
包装: 带卷 (TR)
输入数目和类型: 4 个单端,单极;4 个单端,双极;2 个差分,单极;2 个差分,双极
Software Description
Configuration/Setup Bytes (Write Cycle)
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
2C Mode
section).
Automatic Shutdown
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 0.5A (external reference mode,
typ) and 300A (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
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 VDD as the reference.
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 60A (typ) and drops to 6A (typ) at
1ksps. At 0.1ksps, the average supply current is just
1A. Table 3 shows AIN3/REF configuration and refer-
ence power-down state.
Scan Modes
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.
Reading a Conversion (Read Cycle)
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
MAX1363/MAX1364
4-Channel, 12-Bit System Monitors with Programmable
Trip Window and SMBus Alert Response
______________________________________________________________________________________
15
SEL1
SEL0
INT REF
POWER-DOWN
REFERENCE VOLTAGE
AIN3/REF
INTERNAL
REFERENCE STATE
00
X
VDD
Analog input
Always off
0
1
X
External reference
Reference input
Always off
1
0
Internal reference
Analog input
Always off
1
0
1
Internal reference
Analog input
Always on
1
0
Internal reference
Reference output
Always off
1
Internal reference
Reference output
Always on
Table 3. Reference Voltage and AIN3/REF Format
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