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參數(shù)資料
| 型號： | AD9734 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 14/12/10-Bit, 1200 MSPS D/A Converters |
| 中文描述： | 14/12/10-Bit，1200 MSPS的D / A轉(zhuǎn)換 |
| 文件頁數(shù)： | 29/42頁 |
| 文件大?。?/td> | 934K |
| 代理商： | AD9734 |
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Preliminary Technical Data
AD9736/AD9735/AD9734
VOLTAGE REFERENCE
Rev. PrJ | Page 29 of 42
The AD9736 output current is set by a combination of digital
control bits and the I120 reference current as shown in Figure 33.
Figure 33. Voltage Reference Circuit
The reference current is obtained by forcing the bandgap voltage
across an external 10kohm resistor from I120 (pin B14) to ground.
The 1.2V nominal bandgap voltage (Vref) will generate a 120uA
reference current in the 10k resistor. This current is adjusted
digitally by FSC<9:0> (REG02, REG03) to set the output full scale
current I
FS
:
>
<
×
+
×
=
0
:
9
1024
192
2
7
R
Vref
FSC
I
FS
The full scale output current range is 10mA to 30mA for register
values from 0x000 to 0x3FF. The default value of 0x200 generates
20mA full scale. The typical range is shown in
Figure 34
.
0
5
10
15
20
25
30
35
0
200
400
600
800
1000
DAC gain code
I
F
Figure 34. I
FS
vs. DAC Gain Code
VREF (pin C14) must be bypassed to ground with a 1nF capacitor.
The bandgap voltage is present on this pin and may be buffered for
use in external circuitry. The typical output impedance is near
5kohms. If desired, an external reference may be used to overdrive
the internal reference by connecting it to the VREF pin.
IPTAT (pin D14) is used for factory testing. It may be left floating
(preferred) or tied to analog ground. It will output a current which
is proportional to absolute temperature. The nominal output is
approximately 10uA at 25C. The slope is approximately 20nA per
degree C.
Current
Scaling
DAC
Vbg
1.2V
FSC<9:0>
Ifull-scale
AD9736
I120
1nF
Vref
I120
10k
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD9735 | 14/12/10-Bit, 1200 MSPS D/A Converters |
| AD9736 | 14/12/10-Bit, 1200 MSPS D/A Converters |
| AD9736-EB | 14/12/10-Bit, 1200 MSPS D/A Converters |
| AD9736BBC | 14/12/10-Bit, 1200 MSPS D/A Converters |
| AD974(中文) | 4-Channel, 16-Bit, 200 kSPS Data Acquisition System(4通道,200kSPS16位數(shù)據(jù)采集系統(tǒng)) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD9734_06 | 制造商:AD 制造商全稱:Analog Devices 功能描述:10-/12-/14-Bit, 1200 MSPS DACS |
| AD9734BBC | 制造商:Analog Devices 功能描述: 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AD9734BBCRL | 制造商:Analog Devices 功能描述:DAC SGL 10-BIT 160CSPBGA - Tape and Reel |
| AD9734BBCZ | 功能描述:IC DAC 10BIT 1.2GSPS 160-CSPBGA RoHS:是 類別: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:1 系列:- 設(shè)置時間:4.5µs 位數(shù):12 數(shù)據(jù)接口: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:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SOICN 包裝:剪切帶 (CT) 輸出數(shù)目和類型:1 電壓，單極；1 電壓，雙極 采樣率（每秒）:* 其它名稱:MCP4921T-E/SNCTMCP4921T-E/SNRCTMCP4921T-E/SNRCT-ND |
| AD9734BBCZ1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:10-/12-/14-Bit, 1200 MSPS DACS |
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