參數(shù)資料
型號(hào)： DAC8420FSZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 10/24頁(yè)
文件大?。?/td> 0K
描述： IC DAC 12BIT QUAD SRL-OUT 16SOIC
產(chǎn)品培訓(xùn)模塊： Data Converter Fundamentals
DAC Architectures
標(biāo)準(zhǔn)包裝： 1
設(shè)置時(shí)間： 8µs
位數(shù)： 12
數(shù)據(jù)接口： 串行
轉(zhuǎn)換器數(shù)目： 4
電壓電源： 雙 ±
功率耗散（最大）： 255mW
工作溫度： -40°C ~ 85°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 16-SOIC（0.295"，7.50mm 寬）
供應(yīng)商設(shè)備封裝： 16-SOIC W
包裝： 管件
輸出數(shù)目和類(lèi)型： 4 電壓，單極；4 電壓，雙極
采樣率（每秒）： 125k
產(chǎn)品目錄頁(yè)面： 786 (CN2011-ZH PDF)
DAC8420
Rev. B | Page 18 of 24
is 16 mV. Thus, the best single-supply operation is obtained with
the output load connected to ground, so the output stage does not
have to sink current.
Like all amplifiers, the DAC8420 output buffers do generate
voltage noise, 52 nV/√Hz typically. This is easily reduced by
adding a simple RC low-pass filter on each output.
REFERENCE CONFIGURATION
The two reference inputs of the DAC8420 allow a great deal
of flexibility in circuit design. The user must take care, however,
to observe the minimum voltage input levels on VREFHI and
VREFLO to maintain the accuracy shown in the data sheet.
These input voltages can be set anywhere across a wide range
within the supplies, but must be a minimum of 2.5 V apart in
any case (see Figure 30). A wide output voltage range can be
obtained with ±5 V references, which can be provided by the
AD588 as shown in Figure 33. Many applications utilize the
DACs to synthesize symmetric bipolar waveforms, which
require an accurate, low drift bipolar reference. The AD588
provides both voltages and needs no external components.
Additionally, the part is trimmed in production for 12-bit
accuracy over the full temperature range without user calibra-
tion. Performing a clear with the reset select CLSEL high allows
the user to easily reset the DAC outputs to midscale, or 0 V in
these applications.
When driving the reference inputs VREFHI and VREFLO, it is
important to note that VREFHI both sinks and sources current,
and that the input currents of both are code dependent. Many
voltage reference products have a limited current sinking
capability and must be buffered with an amplifier to drive
VREFHI in order to maintain overall system accuracy. The
input VREFLO, however, has no such requirement.
8
9
16
15
14
12
11
10
DAC8420
1
5
9
10
8
12
11
13
3
4
6
7
1
14
15
2
16
0.1F
+15V
SUPPLY
–15V
SUPPLY
SYSTEM
GROUND
+5V
–5V
A3
A4
+VS
–VS
AD588
R4
R5
R6
R2
R1
RB
R3
1F
A1
A2
DAC A
DAC B
DAC C
DAC D
4
5
DIGITAL
CONTROLS
GND
DIGITAL INPUTS
VREFHI
+5V
VREFLO
–5V
2
3
6
7
+15V SUPPLY
0.1F
–15V SUPPLY
0.1F
VOUTA
VOUTB
VOUTC
VOUTD
0
027
5-
0
33
Figure 33. ±10 V Bipolar Reference Configuration Using the AD588
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DAC8420FSZ 制造商:Analog Devices 功能描述:QUAD VOLT-OUTPUT 12-BIT
DAC8420FSZ2 制造商:AD 制造商全稱:Analog Devices 功能描述:Quad 12-Bit Serial Voltage Output DAC
DAC8420FSZ-REEL 功能描述:IC DAC 12BIT QUAD SRL LP 16SOIC 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:Data Converter Fundamentals DAC Architectures 標(biāo)準(zhǔn)包裝:750 系列:- 設(shè)置時(shí)間:7µs 位數(shù):16 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 電壓電源:雙 ± 功率耗散（最大）:100mW 工作溫度:0°C ~ 70°C 安裝類(lèi)型:表面貼裝 封裝/外殼:28-LCC（J 形引線） 供應(yīng)商設(shè)備封裝:28-PLCC（11.51x11.51） 包裝:帶卷 (TR) 輸出數(shù)目和類(lèi)型:1 電壓，單極；1 電壓，雙極 采樣率（每秒）:143k
DAC8420FSZ-REEL2 制造商:AD 制造商全稱:Analog Devices 功能描述:Quad 12-Bit Serial Voltage Output DAC
DAC8420GBC 制造商:未知廠家 制造商全稱:未知廠家 功能描述:12-Bit Digital-to-Analog Converter
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