參數(shù)資料
型號(hào)： MAX1452EAE+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 5/25頁(yè)
文件大?。?/td> 0K
描述： IC SENSOR SIGNAL COND 16-SSOP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,000
類型： 信號(hào)調(diào)節(jié)器
輸入類型： 模擬
輸出類型： 模擬
接口： 串行
電流 - 電源： 2.5mA
安裝類型： 表面貼裝
封裝/外殼： 16-SSOP（0.209"，5.30mm 寬）
供應(yīng)商設(shè)備封裝： 16-SSOP
包裝： 帶卷 (TR)
MAX1452
Low-Cost Precision Sensor
Signal Conditioner
13
Maxim Integrated
3) Write the load internal calibration register (LdICR)
command to CRIL[3:0].
When a LdICR command is issued to the CRIL register,
the calibration register loaded depends on the address
in the internal calibration register address (ICRA). Table
12 specifies which calibration register is decoded.
Erasing and Writing the EEPROM
The internal EEPROM needs to be erased (bytes set to
FFhex) prior to programming the desired contents.
Remember to save the 3 MSBs of byte 161hex (high-
byte of the configuration register) and restore it when
programming its contents to prevent modification of the
trimmed oscillator frequency.
The internal EEPROM can be entirely erased with the
ERASE command, or partially erased with the
PageErase command (see Table 11, CRIL command).
It is necessary to wait 6ms after issuing the ERASE or
PageErase command.
After the EEPROM bytes have been erased (value of
every byte = FFhex), the user can program its contents,
following the procedure below:
1) Write the 8 data bits to DHR[7:0] using two byte
accesses into the interface register set.
2) Write the address of the target internal EEPROM
location to IEEA[9:0] using three byte accesses into
the interface register set.
3) Write the EEPROM write command (EEPW) to
CRIL[3:0].
Serial Digital Output
When a RdIRS command is written to CRIL[3:0], DIO is
configured as a digital output and the contents of the
register designated by IRSP[3:0] are sent out as a byte
framed by a start bit and a stop bit.
Once the tester finishes sending the RdIRS command,
it must three-state its connection to DIO to allow the
MAX1452 to drive the DIO line. The MAX1452 three-
states DIO high for 1 byte time and then drive with the
start bit in the next bit period followed by the data byte
and stop bit. The sequence is shown in Figure 5.
The data returned on a RdIRS command depends on
the address in IRSP. Table 13 defines what is returned
for the various addresses.
Multiplexed Analog Output
When a RdAlg command is written to CRIL[3:0] the
analog signal designated by ALOC[3:0] is asserted on
the OUT pin. The duration of the analog signal is deter-
mined by ATIM[3:0] after which the pin reverts to three-
state. While the analog signal is asserted in the OUT
pin, DIO is simultaneously three-stated, enabling a par-
allel wiring of DIO and OUT. When DIO and OUT are
connected in parallel, the host computer or calibration
system must three-state its connection to DIO after
asserting the stop bit. Do not load the OUT line when
reading internal signals, such as BDR, FSOTC...etc.
The analog output sequence with DIO and OUT is
shown in Figure 6.
The duration of the analog signal is controlled by
ATIM[3:0] as given in Table 14.
DRIVEN BY TESTER
DRIVEN BY MAX1452
THREE-STATE
NEED WEAK
PULLUP
THREE-STATE
NEED WEAK
PULLUP
START-BIT
LSB
START-BIT
LSB
MSB
STOP-BIT
MSB
STOP-BIT
11 1 1 1 0 1 0 0 11 0 1 0 1 1 111 11 1 1 10 0 0 0 0 1 0 0 0 1 11 1 1 1 1 1 1 11
DIO
Figure 5. DIO Output Data Format
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