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參數(shù)資料
| 型號： | MX636JCWE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 模擬專用變換器 |
| 英文描述： | RECTIFIER GPP 1000V 3A DO-201AD |
| 中文描述： | RMS TO DC CONVERTER, 0.1 MHz, PDSO16 |
| 封裝： | SOP-16 |
| 文件頁數(shù)： | 8/12頁 |
| 文件大小： | 123K |
| 代理商： | MX636JCWE |
M
High-Ac c urac y Adjustments
The accuracy of the MX536A/MX636 can be improved
by the addition of external trims as shown in Figure 4.
R4 trims the offset. The input should be grounded and
R4 adjusted to give zero volts output from pin 6. R1 is
trimmed to give the correct value for either a calibrated
DC input or a calibrated AC signal. For example: 200mV
DC input should give 200mV DC output; a ±200mV
peak-to-peak sine-wave should give 141mV DC output.
S ingle-S upply Operation
Both the MX536A and the MX636 can be used with a
single supply down to +5V (Figure 5). The major limita-
tion of this connection is that only AC signals can be
measured, since the differential input stage must be
biased off ground for proper operation. The load resis-
tor is necessary to provide output sink current. The
input signal is coupled through C2 and the value cho-
sen so that the desired low-frequency break point is
obtained with the input resistance of 16.7k
for the
MX536A and 6.7k
for the MX636.
Figure 5 shows how to bias pin 10 within the range of
the supply voltage (pin 2 on “H” packages). It is critical
that no extraneous signals are coupled into this pin. A
capacitor connected between pin 10 and ground is
recommended. The common pin requires less than 5μA
of input current, and if the current flowing through resis-
tors R1 and R2 is chosen to be approximately 10 times
the common pin current, or 50μA, the resistor values
can easily be calculated.
Choosing the Averaging T ime Constant
Both the MX536A and MX636 compute the RMS value
of AC and DC signals. At low frequencies and DC, the
output tracks the input exactly; at higher frequencies,
the average output approaches the RMS value of the
input signal. The actual output differs from the ideal by
an average (or DC) error plus some amount of ripple.
The DC error term is a function of the value of C
AV
and
the input signal frequency. The output ripple is inverse-
True RMS -to-DC Converters
8
_______________________________________________________________________________________
100
0.1
0.22
0.65
1
100
1k
1
10
10
0.01
0.1
1
FREQUENCY (Hz)
E
A
μ
F
10
60
O
1%
0.1%
Figure 3. Lower Frequency for Stated % of Reading Error and
Settling Time for Circuit shown in Figure 2
14
13
12
11
10
9
8
1
2
3
4
5
6
7
ABSOLUTE
VALUE
SQUARER
DIVIDER
CURRENT
MIRROR
BUF
V
IN
-V
S
R1
+V
S
V
OUT
C
AV
R2
R3
R4
-V
S
+V
S
MX536A
500
365
750k
50k
MX636
200
154
470k
500k
R1
R2
R3
R4
MX536A
MX636
Figure 4. Optional External Gain and Output Offset Trims
14
13
12
11
10
9
8
1
2
3
4
5
6
7
ABSOLUTE
VALUE
SQUARER
DIVIDER
CURRENT
MIRROR
BUF
V
IN
+V
S
R
L
V
OUT
C
AV
R1
R2
MX536A
20k
10k
1
μ
F
MX636
20k
39k
3.3
μ
F
R1
R2
C2
10k TO1k
0.1
μ
F
0.1
μ
F
C2
MX536A
MX636
Figure 5. Single-Supply Operation
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MX636JD | RECTIFIER STANDARD SINGLE 3A 1000V 1000 200A-ifsm 10uA-ir 1V-vf DO-201AD 1.2K/REEL-13 |
| MX636JH | DIODE, SI, SCHOTTKY SOD-323 PLSTC |
| MX636JN | DIODE SCHOTTKY SINGLE 50V 150mW 0.41V-vf 15mA-IFM 1mA-IF 0.2uA-IR SOD-323 3K/REEL |
| MX536AKD | True RMS-to-DC Converters |
| MX536AKH | True RMS-to-DC Converters |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MX636JD | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MX636JH | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MX636JN | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MX636JN+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MX636JQ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:RMS-to-DC Converter |
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