參數(shù)資料
型號(hào)： LTC2605IGN-1#PBF
廠商： Linear Technology
文件頁(yè)數(shù)： 4/18頁(yè)
文件大?。?/td> 0K
描述： IC DAC 16BIT OCT I2C 16-SSOP
標(biāo)準(zhǔn)包裝： 100
設(shè)置時(shí)間： 10µs
位數(shù)： 16
數(shù)據(jù)接口： I²C
轉(zhuǎn)換器數(shù)目： 8
電壓電源： 單電源
功率耗散（最大）： 6mW
工作溫度： -40°C ~ 85°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 16-SSOP（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 16-SSOP
包裝： 管件
輸出數(shù)目和類(lèi)型： 8 電壓，單極
采樣率（每秒）： *
產(chǎn)品目錄頁(yè)面： 1351 (CN2011-ZH PDF)
配用： DC935A-ND - BOARD DAC LTC2605
LTC2605/LTC2615/LTC2625
12
2605fa
OPERATION
When the master has nished communicating with the
slave, it issues a STOP condition. A STOP condition is
generated by transitioning SDA from low to high while
SCL is high. The bus is then free for communication with
another I2C device.
Acknowledge
The Acknowledge signal is used for handshaking between
the master and the slave. An Acknowledge (active LOW)
generated by the slave lets the master know that the lat-
est byte of information was received. The Acknowledge
related clock pulse is generated by the master. The master
releases the SDA line (HIGH) during the Acknowledge
clock pulse. The slave-receiver must pull down the SDA
during the Acknowledge clock pulse so that it remains a
stable LOW during the HIGH period of this clock pulse.
The LTC2605/LTC2615/LTC2625 respond to a write by a
master in this manner. The LTC2605/LTC2615/LTC2625 do
not acknowledge a read (it retains SDA HIGH during the
period of the Acknowledge clock pulse).
Chip Address
The state of CA0, CA1 and CA2 decides the slave address
of the part. The pins CA0, CA1 and CA2 can be each set to
any one of three states: VCC, GND or FLOAT. This results
in 27 selectable addresses for the part. The addresses
corresponding to the states of CA0, CA1 and CA2 and the
global address are shown in Table 2.
In addition to the address selected by the address pins,
the parts also respond to a global address. This address
allows a common write to all LTC2605, LTC2615 and
LTC2625 parts to be accomplished with one 3-byte write
transaction on the I2C bus. The global address is a 7-bit
hard-wired address and is not selectable by CA0, CA1 and
CA2. The maximum capacitive load allowed on the address
pins (CA0, CA1 and CA2) is 10pF.
Write Word Protocol
The master initiates communication with the LTC2605/
LTC2615/LTC2625 with a START condition and a 7-bit slave
address followed by the Write bit (W) = 0. The LTC2605/
LTC2615/LTC2625 acknowledges by pulling the SDA pin
Table 2. Slave Address Map
CA2
CA1
CA0
SA6
SA5
SA4
SA3
SA2
SA1
SA0
GND
0
1
0
GND
FLOAT
0010001
GND
VCC
0010010
GND
FLOAT
GND
0010011
GND
FLOAT FLOAT
0100000
GND
FLOAT
VCC
0100001
GND
VCC
GND
0100010
GND
VCC
FLOAT
0100011
GND
VCC
0110000
FLOAT
GND
0110001
FLOAT
GND
FLOAT
0110010
FLOAT
GND
VCC
0110011
FLOAT FLOAT
GND
1000000
FLOAT FLOAT FLOAT
1
0
1
FLOAT FLOAT
VCC
1000010
FLOAT
VCC
GND
1000011
FLOAT
VCC
FLOAT
1010000
FLOAT
VCC
1010001
VCC
GND
1010010
VCC
GND
FLOAT
1010011
VCC
GND
VCC
1100000
VCC
FLOAT
GND
1100001
VCC
FLOAT FLOAT
1100010
VCC
FLOAT
VCC
1100011
VCC
GND
1110000
VCC
FLOAT
1110001
VCC
1110010
GLOBAL ADDRESS
1
0
1
low at the 9th clock if the 7-bit slave address matches the
address of the parts (set by CA0, CA1 and CA2) or the
global address. The master then transmits three bytes of
data. The LTC2605/LTC2615/LTC2625 acknowledges each
byte of data by pulling the SDA line low at the 9th clock of
each data byte transmission. After receiving three complete
bytes of data, the LTC2605/LTC2615/LTC2625 executes the
command specied in the 24-bit input word.
If more than three data bytes are transmitted after a valid
7-bit slave address, the LTC2605/LTC2615/LTC2625 do not
acknowledge the extra bytes of data (SDA is high during
the 9th clock).
相關(guān)PDF資料
PDF描述
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