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參數(shù)資料
| 型號： | AD2S81 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Variable Resolution, Monolithic Resolver-to-Digital Converters |
| 中文描述： | 可變分辨率，單片分解到數(shù)字轉換器 |
| 文件頁數(shù)： | 10/16頁 |
| 文件大?。?/td> | 207K |
| 代理商： | AD2S81 |
REV. B
–10–
AD2S81A/AD2S82A
BUSY
RIPPLE
CLK
DATA
DIR
DATA
BYTE
SELECT
DATA
ENABLE
INHIBIT
V
L
t
3
V
H
t
1
V
H
t
2
t
4
V
H
V
L
V
H
V
H
t
5
V
L
V
H
INHIBIT
t
6
V
H
t
7
t
8
t
9
V
L
V
L
V
L
t
10
V
Z
V
H
V
L
t
11
V
L
V
H
V
H
V
L
t
13
t
12
PARAMETER
t
1
t
2
t
3
t
4
t
5
t
6
t
7
t
8
t
9
t
10
t
11
t
12
t
13
T
MIN
200
10
470
16
3
70
485
515
–
40
35
60
60
T
MAX
600
25
580
45
25
140
625
670
600
110
110
140
125
CONDITION
BUSY WIDTH V
H
–V
H
RIPPLE CLOCK V
H
TO BUSY V
H
RIPPLE CLOCK V
L
TO NEXT BUSY V
H
BUSY V
H
TO DATA V
H
BUSY V
H
TO DATA V
L
INHIBIT
V
H
TO BUSY V
H
MIN DIR V
H
TO BUSY V
H
MIN DIR V
H
TO BUSY V
H
INHIBIT
V
L
TO DATA STABLE
ENABLE
V
L
TO DATA V
H
ENABLE
V
L
TO DATA V
L
BYTE SELECT V
L
TO DATA STABLE
BYTE SELECT V
H
TO DATA STABLE
Figure 3. Digital Timing
PHASE-
SENSITIVE
DEMODULATOR
AC ERROR
RATIO
MULTIPLIER
A1 sin (
u
–
f
) sin
v
t
sin
u
sin
v
t
cos
u
sin
v
t
DIGITAL
f
VCO
C4
C5
R5
R4
R6
VELOCITY
CLOCK
DIRECTION
INTEGRATOR
Figure 4. AD2S81A/AD2S82A Functional Diagram
CIRCUIT FUNCTIONS AND DYNAMIC
PERFORMANCE
The AD2S81A/AD2S82A allows the user greater flexibility in
choosing the dynamic characteristics of the resolver-to-digital
conversion to ensure the optimum system performance. The
characteristics are set by the external components shown in
Figure 1, and the Component Selection section explains how to
select desired maximum tracking rate and bandwidth values.
The following paragraphs explain in greater detail the circuit of
the AD2S81A/AD2S82A and the variations in the dynamic
performance available to the user.
Loop Compensation
The AD2S81A and AD2S82A (connected as shown in Figure
1a and 1b) operates as a type 2 tracking servo loop where the
VCO/counter combination and integrator perform the two inte-
gration functions inherent in a type 2 loop.
Additional compensation in the form of a pole/zero pair is re-
quired to stabilize any type 2 loop to avoid the loop gain charac-
teristic crossing the 0 dB axis with 180
°
of additional phase lag,
as shown in Figure 6. This compensation is implemented by the
integrator components (R4, C4, R5, C5).
The overall response of such a system is that of a unity gain
second order low pass filter, with the angle of the resolver as the
input and the digital position data as the output.
The AD2S81A/AD2S82A does not have to be connected as
tracking converter, parts of the circuit can be used indepen-
dently. This is particularly true of the Ratio Multiplier which
can be used as a control transformer (see Application Note).
A block diagram of the AD2S81A/AD2S82A is given in
Figure 4.
相關PDF資料 |
PDF描述 |
|---|---|
| AD2S81AJD | Variable Resolution, Monolithic Resolver-to-Digital Converters |
| AD2S82 | Variable Resolution, Monolithic Resolver-to-Digital Converters |
| AD2S82AKP | Variable Resolution, Monolithic Resolver-to-Digital Converters |
| AD2S82ALP | Variable Resolution, Monolithic Resolver-to-Digital Converters |
| AD2S83 | Variable Resolution, Monolithic Resolver-to-Digital Converters(可變分辨率,單片解算-數(shù)字變換器) |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AD2S81A | 制造商:AD 制造商全稱:Analog Devices 功能描述:Variable Resolution, Monolithic Resolver-to-Digital Converters |
| AD2S81AJD | 功能描述:IC R/D CONV TRACKING 28CDIP RoHS:否 類別:集成電路 (IC) >> 接口 - 傳感器和探測器接口 系列:- 其它有關文件:Automotive Product Guide 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:74 系列:- 類型:觸控式傳感器 輸入類型:數(shù)字 輸出類型:數(shù)字 接口:JTAG，串行 電流 - 電源:100µA 安裝類型:表面貼裝 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:20-TSSOP 包裝:管件 |
| AD2S82 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Variable Resolution, Monolithic Resolver-to-Digital Converters |
| AD2S82A | 制造商:AD 制造商全稱:Analog Devices 功能描述:Variable Resolution, Monolithic Resolver-to-Digital Converters |
| AD2S82AHP | 功能描述:IC R/D CONV TRACKING 44PLCC RoHS:否 類別:集成電路 (IC) >> 接口 - 傳感器和探測器接口 系列:- 其它有關文件:Automotive Product Guide 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:74 系列:- 類型:觸控式傳感器 輸入類型:數(shù)字 輸出類型:數(shù)字 接口:JTAG，串行 電流 - 電源:100µA 安裝類型:表面貼裝 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:20-TSSOP 包裝:管件 |
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