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參數(shù)資料
| 型號(hào)： | LTC1661IMS8 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | DAC |
| 英文描述： | Micropower Dual 10-Bit DAC in MSOP |
| 中文描述： | SERIAL INPUT LOADING, 30 us SETTLING TIME, 10-BIT DAC, PDSO8 |
| 封裝： | PLASTIC, MSOP-8 |
| 文件頁數(shù)： | 7/12頁 |
| 文件大?。?/td> | 147K |
| 代理商： | LTC1661IMS8 |
7
LTC 1661
OPERATIOU
Transfer Function
The transfer function for the LTC1661 is:
V
k
V
OUT IDEAL
(
REF
)
=
1024
where k is the decimal equivalent of the binary DAC input
code D9-D0 and V
REF
is the voltage at REF (Pin 6).
Power-On Reset
The LTC1661 positively clears the outputs to zero scale
when power is first applied, making system initialization
consistent and repeatable.
Power Supply Sequencing
The voltage at REF (Pin 4) must not ever exceed the voltage
at V
CC
(Pin 6) by more than 0.3V. Particular care should be
taken in the power supply turn-on and turn-off sequences
to assure that this limit is observed. See Absolute Maxi-
mum Ratings.
Serial Interface
See Table 1. The 16-bit Input word consists of the 4-bit
Control code, the 10-bit Input code and two don’t-care bits.
Table 1. LTC1661 Input Word
By selecting the appropriate 4-bit Control code (see Table2)
it is possible to perform single operations, such as loading
one DAC or changing Power-Down status (Sleep/Wake).
In addition, some Control codes perform two or more
operations at the same time. For example, one such code
loads DAC A, updates both outputs and Wakes the part up.
The DACs can be loaded separately or together, but the
outputs are always updated together.
Register Loading Sequence
See Figure 1. With CS/LD held low, data on the D
IN
input
is shifted into the 16-bit Shift Register on the positive edge
of SCK. The 4-bit Control code, A3-A0, is loaded first, then
the 10-bit Input code, D9-D0, ordered MSB-to-LSB in each
case. Two don’t-care bits, X1 and X0, are loaded last.
When the full 16-bit Input word has been shifted in, CS/LD
is pulled high, causing the system to respond according to
Table2. The clock is disabled internally when CS/LD is
high. Note: SCK must be low when CS/LD is pulled low.
Sleep Mode
DAC control code 1110
b
is reserved for the special Sleep
instruction (see Table 2). In this mode, the digital parts of
the circuit stay active while the analog sections are dis-
abled; static power consumption is greatly reduced. The
reference input and analog outputs are set in a high
impedance state and all DAC settings are retained in
memory so that when Sleep mode is exited, the outputs of
DACs not updated by the Wake command are restored to
their last active state.
Sleep mode is initiated by performing a load sequence
using control code 1110
b
(the DAC input code D9-D0 is
ignored).
To save instruction cycles, the DACs may be prepared with
new input codes during Sleep (control codes 0001
b
and
0010
b
); then, a single command (1000
b
) can be used both
to wake the part and to update the output values.
A3 A2 A1
Control Code
A0 D9 D8 D7 D6 D5 D4 D3 D2 D1
X1 X0
D0
Input Code
Input Word
Don’t
Care
After the Input word is loaded into the register (see Figure1),
it is internally converted from serial to parallel format. The
parallel 10-bit-wide Input code data path is then buffered
by two latch registers.
The first of these, the Input Register, is used for loading new
input codes. The second buffer, the DAC Register, is used
for updating the DAC outputs. Each DAC has its own 10-bit
Input Register and 10-bit DAC Register.
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| LTC1661 | 8-Bit, 30MSPS Single DAC 20-SOIC 0 to 70 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| LTC1661IMS8#PBF | 功能描述:IC D/A CONV 10BIT MICRPWR 8-MSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:Data Converter Fundamentals DAC Architectures 設(shè)計(jì)資源:Unipolar, Precision DC Digital-to-Analog Conversion using AD5450/1/2/3 8-14-Bit DACs (CN0052) Precision, Bipolar, Configuration for AD5450/1/2/3 8-14bit Multiplying DACs (CN0053) AC Signal Processing Using AD5450/1/2/3 Current Output DACs (CN0054) Programmable Gain Element Using AD5450/1/2/3 Current Output DAC Family (CN0055) Single Supply Low Noise LED Current Source Driver Using a Current Output DAC in the Reverse Mode (CN0139) 標(biāo)準(zhǔn)包裝:10,000 系列:- 設(shè)置時(shí)間:- 位數(shù):12 數(shù)據(jù)接口:DSP，MICROWIRE?，QSPI?，串行，SPI? 轉(zhuǎn)換器數(shù)目:1 電壓電源:單電源 功率耗散（最大）:- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 薄型，TSOT-23-8 供應(yīng)商設(shè)備封裝:TSOT-23-8 包裝:帶卷 (TR) 輸出數(shù)目和類型:1 電流，單極；1 電流，雙極 采樣率（每秒）:2.7M |
| LTC1661IMS8#PBF | 制造商:Linear Technology 功能描述:IC, DAC, 10BIT, MSOP-8 |
| LTC1661IMS8#TR | 功能描述:IC DAC 10BIT DUAL MICROPWR 8MSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:Data Converter Fundamentals DAC Architectures 設(shè)計(jì)資源:Unipolar, Precision DC Digital-to-Analog Conversion using AD5450/1/2/3 8-14-Bit DACs (CN0052) Precision, Bipolar, Configuration for AD5450/1/2/3 8-14bit Multiplying DACs (CN0053) AC Signal Processing Using AD5450/1/2/3 Current Output DACs (CN0054) Programmable Gain Element Using AD5450/1/2/3 Current Output DAC Family (CN0055) Single Supply Low Noise LED Current Source Driver Using a Current Output DAC in the Reverse Mode (CN0139) 標(biāo)準(zhǔn)包裝:10,000 系列:- 設(shè)置時(shí)間:- 位數(shù):12 數(shù)據(jù)接口:DSP，MICROWIRE?，QSPI?，串行，SPI? 轉(zhuǎn)換器數(shù)目:1 電壓電源:單電源 功率耗散（最大）:- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 薄型，TSOT-23-8 供應(yīng)商設(shè)備封裝:TSOT-23-8 包裝:帶卷 (TR) 輸出數(shù)目和類型:1 電流，單極；1 電流，雙極 采樣率（每秒）:2.7M |
| LTC1661IMS8#TRPBF | 功能描述:IC D/A CONV 10BIT MICRPWR 8-MSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:Data Converter Fundamentals DAC Architectures 設(shè)計(jì)資源:Unipolar, Precision DC Digital-to-Analog Conversion using AD5450/1/2/3 8-14-Bit DACs (CN0052) Precision, Bipolar, Configuration for AD5450/1/2/3 8-14bit Multiplying DACs (CN0053) AC Signal Processing Using AD5450/1/2/3 Current Output DACs (CN0054) Programmable Gain Element Using AD5450/1/2/3 Current Output DAC Family (CN0055) Single Supply Low Noise LED Current Source Driver Using a Current Output DAC in the Reverse Mode (CN0139) 標(biāo)準(zhǔn)包裝:10,000 系列:- 設(shè)置時(shí)間:- 位數(shù):12 數(shù)據(jù)接口:DSP，MICROWIRE?，QSPI?，串行，SPI? 轉(zhuǎn)換器數(shù)目:1 電壓電源:單電源 功率耗散（最大）:- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 薄型，TSOT-23-8 供應(yīng)商設(shè)備封裝:TSOT-23-8 包裝:帶卷 (TR) 輸出數(shù)目和類型:1 電流，單極；1 電流，雙極 采樣率（每秒）:2.7M |
| LTC1661IN8 | 功能描述:IC D/A CONV 10BIT MICRPWR 8-DIP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:Data Converter Fundamentals DAC Architectures 設(shè)計(jì)資源:Unipolar, Precision DC Digital-to-Analog Conversion using AD5450/1/2/3 8-14-Bit DACs (CN0052) Precision, Bipolar, Configuration for AD5450/1/2/3 8-14bit Multiplying DACs (CN0053) AC Signal Processing Using AD5450/1/2/3 Current Output DACs (CN0054) Programmable Gain Element Using AD5450/1/2/3 Current Output DAC Family (CN0055) Single Supply Low Noise LED Current Source Driver Using a Current Output DAC in the Reverse Mode (CN0139) 標(biāo)準(zhǔn)包裝:10,000 系列:- 設(shè)置時(shí)間:- 位數(shù):12 數(shù)據(jù)接口:DSP，MICROWIRE?，QSPI?，串行，SPI? 轉(zhuǎn)換器數(shù)目:1 電壓電源:單電源 功率耗散（最大）:- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 薄型，TSOT-23-8 供應(yīng)商設(shè)備封裝:TSOT-23-8 包裝:帶卷 (TR) 輸出數(shù)目和類型:1 電流，單極；1 電流，雙極 采樣率（每秒）:2.7M |
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