參數(shù)資料
型號(hào)： LTC1590IS
廠商： LINEAR TECHNOLOGY CORP
元件分類(lèi)： DAC
英文描述： Dual Serial 12-Bit Multiplying DAC
中文描述： DUAL, SERIAL INPUT LOADING, 0.3 us SETTLING TIME, 12-BIT DAC, PDSO16
封裝： 0.150 INCH, PLASTIC, SO-16
文件頁(yè)數(shù)： 7/12頁(yè)
文件大?。?/td> 288K
代理商： LTC1590IS
7
LTC1590
TI
M
I
N
G
S
W
D11 A
MSB
D10 A
D9 A
D1 B
t
1
t
6
D0 B
LSB
t
2
t
4
t
3
t
9
CLK
D
IN
D
OUT
CS/LD
t
5
1590 TD02
D11 A
PREVIOUS WORD
D10 A
PREVIOUS WORD
D0 B
PREVIOUS WORD
D11 A
CURRENT WORD
D9 A
PREVIOUS WORD
t
8
t
7
1
2
3
23
24
TIMING DIAGRAM
APPLICATIO
S I
N
FOR
ATIO
U
W
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
D
IN
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 D
OUT
pin. Multiple DACs can be daisy-chained on
one 3-wire interface by connecting the D
OUT
pin to the D
IN
pin of the next DAC (see the Timing Diagrams section).
MICROWIRE is a trademark of National Semiconductor Corporation.
R
R
R
O
V
REF A
V
REF B
R
FB A
R
FB B
OUT1 A
OUT1 B
OUT2 A
OUT2 B
AGND
1590 F01
I
LKG
C
OUT
CODE
4096
V
REF
R
(
)(
)
Equivalent Circuit
Figure 1 shows an equivalent analog circuit for the LTC1590
DACs. R is the reference input, R
REF
, which is nominally
11k. The DAC output is represented by the Thevinin
equivalent current source with a value of:
(Code/4096)(V
REF
/R)
The current source I
LKG
models the junction leakage of the
DAC output switches. I
LKG
is typically less than 5nA at
85
°
C and decreases by roughly two times for every 10
°
C
reduction in temperature. C
OUT
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. R
O
is the
equivalent output resistance, which varies with digital
input code (see Op Amp Selection section).
Figure 1. Equivalent Circuit
相關(guān)PDF資料
PDF描述
LTC1590 Dual Serial 12-Bit Multiplying DAC(雙路串行電流輸出12位乘法數(shù)模轉(zhuǎn)換器)
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LTC1597 16-Bit Parallel Low Glitch Multiplying DACs with 4-Quadrant Resistors(16位并行低干擾乘法數(shù)模轉(zhuǎn)換器(帶4象限電阻))
LTC1594LCS 4- and 8-Channel, 3V Micropower Sampling 12-Bit Serial I/O A/D Converters
LTC1594LIS 4- and 8-Channel, 3V Micropower Sampling 12-Bit Serial I/O A/D Converters
相關(guān)代理商/技術(shù)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(lèi)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:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 設(shè)置時(shí)間:4µs 位數(shù):12 數(shù)據(jù)接口:串行 轉(zhuǎn)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(lèi)型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-uMAX 包裝:管件 輸出數(shù)目和類(lèi)型:2 電壓，單極 采樣率（每秒）:* 產(chǎn)品目錄頁(yè)面:1398 (CN2011-ZH PDF)
LTC1590IS#TR 功能描述:IC DAC 12BIT MULT DUAL 16SOIC RoHS:否 類(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:47 系列:- 設(shè)置時(shí)間:2µs 位數(shù):14 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)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(lèi)型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:管件 輸出數(shù)目和類(lèi)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(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:47 系列:- 設(shè)置時(shí)間:2µs 位數(shù):14 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)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(lèi)型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:管件 輸出數(shù)目和類(lèi)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(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:47 系列:- 設(shè)置時(shí)間:2µs 位數(shù):14 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)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(lèi)型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:管件 輸出數(shù)目和類(lèi)型:1 電流，單極；1 電流，雙極 采樣率（每秒）:*
LTC1591-1CG#PBF 功能描述:IC D/A CONV 14BIT PAR 28-SSOP RoHS:是 類(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:47 系列:- 設(shè)置時(shí)間:2µs 位數(shù):14 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)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(lèi)型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:管件 輸出數(shù)目和類(lèi)型:1 電流，單極；1 電流，雙極 采樣率（每秒）:*
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