參數(shù)資料
型號： TC1320EOA
廠商： Microchip Technology Inc.
英文描述： 8-Bit Digital-to-Analog Converter with Two-Wire Interface
中文描述： 8位數(shù)字到模擬轉(zhuǎn)換器兩線接口
文件頁數(shù)： 6/14頁
文件大?。?/td> 442K
代理商： TC1320EOA
TC1320
DS21386B-page 6
2002 Microchip Technology Inc.
3.0
DETAILED DESCRIPTION
The TC1320 is a monolithic 8-bit digital-to-analog con-
verter, that is designed to operate from a single supply
that can range from 2.7V to 5.5V. The DAC consists of
a data register (DATA), a configuration register
(CONF), and a current output amplifier. The TC1320
uses an external reference, which also determines the
maximum output voltage.
The TC1320 uses a current steering DAC, based on an
array of matched current sources. This current, along a
precision resistor, converts the contents of the Data
Register and V
REF
into an output voltage, V
OUT
given
by:
V
OUT
= V
REF
(DATA/256)
3.1
Reference Input
The reference pin, V
REF
, is a buffered high-impedance
input and because of this, the load regulation of the ref-
erence source needs only to be able to tolerate leakage
levels of current (less than 1
μ
A). V
REF
accepts a volt-
age range from 0 to (V
DD
– 1.2V). Input capacitance is
typically 10pF.
3.2
Output Amplifier
The TC1320 DAC output is buffered with an internal
unity gain rail-to-rail input/output amplifier, with a typical
slew rate of 0.8V/
μ
sec. Maximum full scale transition
settling time is 10
μ
sec to within ±1/2LSB when loaded
with 1k
in parallel with 100pF.
3.3
Standby Mode
The TC1320 allows the host to put it into a Low Power
(I
DD
= 0.5
μ
A, typical) Standby mode. In this mode, the
D/A conversion is halted. The SMBus port operates
normally. Standby mode is enabled by setting the
SHDN bit in the CONFIG register. The table below
summarizes this operation.
TABLE 3-1:
STANDBY MODE OPERATION
3.4
SMBus Slave Address
The TC1320 is internally programmed to have a default
SMBus address value of
1001 000b
. Seven other
addresses are available by custom order (contact fac-
tory). See Figure 3-1 for locating address bits in SMBus
protocol.
FIGURE 3-1:
SMBus PROTOCOLS
SHDN Bit
Operating Mode
0
1
Normal
Standby
S
Address
7-Bits
R/W
0
ACK
Command
ACK
Data
ACK
P
8-Bits
8-Bits
Slave Address
Command Byte: selects
which register you are
writing to.
Data Byte: data goes
into the register set
by the command byte.
Write 1-Byte Format
Read 1-Byte Format
S
Address
7-Bits
R/W
0
ACK
Command
8-Bits
ACK
S
Address
R/W ACK
Data
NACK
P
7-Bits
8-Bits
Slave Address
Command Byte: selects
which register you are
reading from.
Slave Address: repeated
due to change in data
flow direction.
Data Byte: reads from
the register set by the
command byte.
Receive 1-Byte Format
S
Address
7-Bits
R/W ACK
Data
NACK
P
1
1
8-Bits
Data Byte: reads data from
the register commanded by
the last Read Byte or Write
Byte transmission.
S = START Condition
P = STOP Condition
Shaded = Slave Transmission
相關(guān)PDF資料
PDF描述
TC1320EUA 8-Bit Digital-to-Analog Converter with Two-Wire Interface
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TC1320EOATRG 制造商:Microchip Technology 功能描述:DAC 1-CH Current Steering 8-bit 8-Pin SOIC N T/R
TC1320EUA 功能描述:數(shù)模轉(zhuǎn)換器- DAC 8-Bit Two-Wire MSOP8 RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
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TC1321EOA 功能描述:數(shù)模轉(zhuǎn)換器- DAC 10-Bit Two-Wire SOIC8 RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
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