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參數(shù)資料
| 型號： | AD7537KRZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 7/10頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAC 12BIT DUAL MULT 24SOIC |
| 產(chǎn)品培訓模塊： | Data Converter Fundamentals DAC Architectures |
| 標準包裝： | 31 |
| 設(shè)置時間： | 250µs |
| 位數(shù)： | 12 |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 2 |
| 電壓電源： | 單電源 |
| 功率耗散（最大）： | 24mW |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 24-SOIC W |
| 包裝： | 管件 |
| 輸出數(shù)目和類型： | 2 電流，單極；2 電流，雙極 |
| 采樣率（每秒）： | 667k |
AD7537
REV.
–6–
SEPARATE AGND PINS
The DACs in the AD7537 have separate AGND lines taken to
pins AGNDA and AGNDB on the package. This increases the
applications versatility of the part. Figure 6 is an example of
this. DAC A is connected in standard fashion as a program-
mable attenuator. AGNDA is at ground potential. DAC B is op-
erating with AGND B biased to +5 V by the AD584. This gives
an output range of +5 V to +10 V.
Figure 6. AD7537 DACs Used in Different Modes
PROGRAMMABLE OSCILLATOR
Figure 7 shows a conventional state variable oscillator in which
the AD7537 controls the programmable integrators. The fre-
quency of oscillation is given by:
f
=
1
2
π
R
6
R
5
×
1
C
1
×C2× REQ1× REQ2
where REQ1 and REQ2 are the equivalent resistances of the
DACs. The same digital code is loaded into both DACs.
If C1 = C2 and R5 = R6, the expression reduces to
f
=
1
2
π
×
1
C
1
REQ1 × REQ2
Since R
EQ
=
2n
× R
LAD
N
, (RLAD = DAC ladder resistance).
f
=
1
2
π
×
1
C
(N /2n )2
RLAD1 × RLAD2
=
1
2
π
×
D
C
1
RLAD1 × RLAD2
D
=
N
2n
=
1
2
π
×
D
C
× R
LAD m
where m is the DAC ladder resistance mismatch ratio, typically
1.005.
With the values shown in Figure 7, the output frequency varies
from 0 Hz to 1.38 kHz. The amplitude of the output signal at
the A3 output is 10 V peak-to-peak and is constant over the
entire frequency span.
Figure 7. Programmable State Variable Oscillator
A
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| AD7537LNZ | 功能描述:IC DAC 12BIT DUAL MULT 24DIP 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)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 設(shè)置時間: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)目和類型:2 電壓，單極 采樣率（每秒）:* 產(chǎn)品目錄頁面:1398 (CN2011-ZH PDF) |
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