TIMING DIAGRA
參數(shù)資料
型號: LTC1590IS
廠商: Linear Technology
文件頁數(shù): 10/12頁
文件大?。?/td> 0K
描述: IC D/A CONV 12BIT DUAL 16-SOIC
產(chǎn)品培訓模塊: LTC275x 18-Bit DAC
標準包裝: 50
設置時間: 1.5µs
位數(shù): 12
數(shù)據(jù)接口: 串行
轉換器數(shù)目: 2
電壓電源: 單電源
功率耗散(最大): 55µW
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 16-SOIC(0.154",3.90mm 寬)
供應商設備封裝: 16-SOIC
包裝: 管件
輸出數(shù)目和類型: 4 電流,單極;4 電流,雙極
采樣率(每秒): *
7
LTC1590
TIMING DIAGRAMS
W
U
W
D11 A
MSB
D10 A
D9 A
D1 B
t1
t6
D0 B
LSB
t2
t4
t3
t 9
CLK
DIN
DOUT
CS/LD
t5
1590 TD02
D11 A
PREVIOUS WORD
D10 A
PREVIOUS WORD
D0 B
PREVIOUS WORD
D11 A
CURRENT WORD
D9 A
PREVIOUS WORD
t8
t7
12
3
23
24
TIMING DIAGRAM
APPLICATIONS INFORMATION
WU
U
Description
The LTC1590 is a dual 12-bit multiplying DAC that has
serial inputs and current outputs. It uses precision R/2R
resistor ladder technology to provide exceptional linearity
and stability. The device operates from a single 5V supply
and provides a
±10V reference input and voltage output
range when used with an external op amp.
Serial I/O
The LTC1590 has a 3-wire SPI/MICROWIRE
TM compatible
serial port that accepts 24-bit serial words. Data is loaded
MSB first with the first 12 bits controlling DAC A and the
second 12 bits controlling DAC B. Data is shifted into the
DIN input on the rising edge of CLK. The CS/LD input must
be taken low before transferring data to enable the CLK
input. After transferring data, CS/LD is pulled high to load
data from the shift register to the DAC registers which
updates both DACs.
The buffered output of the 24-bit shift register is available
on the DOUT pin. Multiple DACs can be daisy-chained on
one 3-wire interface by connecting the DOUT pin to the DIN
pin of the next DAC (see the Timing Diagrams section).
MICROWIRE is a trademark of National Semiconductor Corporation.
R
RO
VREF A
VREF B
RFB A
RFB B
OUT1 A
OUT1 B
OUT2 A
OUT2 B
AGND
1590 F01
ILKG
COUT
CODE
4096
VREF
R
()( )
Equivalent Circuit
Figure 1 shows an equivalent analog circuit for the LTC1590
DACs. R is the reference input, RREF, which is nominally
11k. The DAC output is represented by the Thevinin
equivalent current source with a value of:
(Code/4096)(VREF/R)
The current source ILKG models the junction leakage of the
DAC output switches. ILKG is typically less than 5nA at
85
°C and decreases by roughly two times for every 10°C
reduction in temperature. COUT is the output capacitance,
and it also comes from the DAC output switches and varies
from 30pF at zero scale to 60pF at full scale. RO is the
equivalent output resistance, which varies with digital
input code (see Op Amp Selection section).
Figure 1. Equivalent Circuit
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相關代理商/技術參數(shù)
參數(shù)描述
LTC1590IS#PBF 功能描述:IC D/A CONV 12BIT DUAL 16-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉換器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 設置時間:4µs 位數(shù):12 數(shù)據(jù)接口:串行 轉換器數(shù)目:2 電壓電源:單電源 功率耗散(最大):- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP,8-MSOP(0.118",3.00mm 寬) 供應商設備封裝:8-uMAX 包裝:管件 輸出數(shù)目和類型:2 電壓,單極 采樣率(每秒):* 產(chǎn)品目錄頁面:1398 (CN2011-ZH PDF)
LTC1590IS#TR 功能描述:IC DAC 12BIT MULT DUAL 16SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉換器 系列:- 標準包裝:47 系列:- 設置時間:2µs 位數(shù):14 數(shù)據(jù)接口:并聯(lián) 轉換器數(shù)目:1 電壓電源:單電源 功率耗散(最大):55µW 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SSOP(0.209",5.30mm 寬) 供應商設備封裝:28-SSOP 包裝:管件 輸出數(shù)目和類型:1 電流,單極;1 電流,雙極 采樣率(每秒):*
LTC1590IS#TRPBF 功能描述:IC D/A CONV 12BIT DUAL 16-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉換器 系列:- 標準包裝:47 系列:- 設置時間:2µs 位數(shù):14 數(shù)據(jù)接口:并聯(lián) 轉換器數(shù)目:1 電壓電源:單電源 功率耗散(最大):55µW 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SSOP(0.209",5.30mm 寬) 供應商設備封裝:28-SSOP 包裝:管件 輸出數(shù)目和類型:1 電流,單極;1 電流,雙極 采樣率(每秒):*
LTC1591-1CG 功能描述:IC D/A CONV 14BIT PAR 28-SSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉換器 系列:- 標準包裝:47 系列:- 設置時間:2µs 位數(shù):14 數(shù)據(jù)接口:并聯(lián) 轉換器數(shù)目:1 電壓電源:單電源 功率耗散(最大):55µW 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SSOP(0.209",5.30mm 寬) 供應商設備封裝:28-SSOP 包裝:管件 輸出數(shù)目和類型:1 電流,單極;1 電流,雙極 采樣率(每秒):*
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