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參數(shù)資料
| 型號： | MAX261BENG+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 14/26頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC FILTER ACT MPU PROG 24-DIP |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 15 |
| 濾波器類型： | 通用開關(guān)電容器 |
| 頻率 - 截止或中心： | 57kHz |
| 濾波器數(shù)： | 2 |
| 濾波器階數(shù)： | 2nd |
| 電源電壓： | 4.74 V ~ 12.6 V，±2.37 V ~ 6.3 V |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 24-DIP（0.300"，7.62mm） |
| 供應商設備封裝： | 24-PDIP |
| 包裝： | 管件 |
MAX260/MAX261/MAX262
Microprocessor Programmable
Universal Active Filters
______________________________________________________________________________________
21
mode 1 the maximum signal is 0 times the input signal,
the input should not exceed ±(2/Q)V, or ±1V in this case.
Clock Feedthrough and Noise
Typical wideband noise for MAX260 series devices is
0.5mVP-P from DC to 100kHz. The noise is virtually
independent of clock frequency. In multistage filters,
the section with the highest Q should be placed first for
lower output noise.
The output waveform of the MAX260 series and other
switched capacitor filters appears as a sampled signal
with stepping or “staircasing” of the output waveform
occurring at the internal sample rate (fCLK/2). This step-
ping, if objectionable, can be removed by adding a sin-
gle-pole AC filter. With no input signal, clock-related
feedthrough is approximately 8mVP-P. This can also be
attenuated with an RC-smoothing filter as shown with
the MAX261 in Figure 17.
Some noise also can be generated at the filter outputs
by transitions at the logic inputs. If this is objectionable,
the digital lines should be buffered from the device by
logic gates as shown in Figure 6.
Input Impedance
The input to each filter is the switched capacitor circuit
shown in Figure 18. In the MAX260, the input capacitor
charges to the input voltage VIN during the first half
clock cycle. During the second half-cycle, its charge is
transferred to the feedback capacitor. The resultant
input impedance can be approximated by:
RIN = 1 / (CINfCLK / 2) = 2 / (CINfCLK).
CIN is around 12pF, hence, for a clock frequency of
500kHz, RIN = 333k
. The input also has about 5pF of
fixed capacitance to ground.
The MAX261/MAX262 input structure is shown in Figure
19. Here CA = 12pF and CB = 0.016pF and only CB is
switched, so the input resistance is 750 times larger
compared to the MAX260 (RIN = 250M
). The
MAX261/MAX262 have a fixed capacitance of approxi-
mately 5pF to ground.
f0 and Q at Low Sample Rates
When low fCLK/f0 ratios and low Q settings are select-
ed, deviation from ideal continuous filter response can
be noticeable in some designs. This is due to interac-
tion between Q and f0 at low fCLK/f0 ratios and Qs. The
data in Figure 20 quantifies these differences. Since the
MAX260
MAX261
MAX262
WR
A0–A3
D0, D1
INA
OR
INB
CMOS
LOGIC
LEVELS
V+
V-
GND
0.1
F
0.1
F
+5V
4.7
F
4.7k
4.7k
NOTE: OP-AMP LEVEL SHIFT CIRCUIT HAS A GAIN OF 0.5 FROM V*.
VIN
TO V+
TO GND PIN
2.5k
7.5k
10k
10k
+
-
SEE
NOTE
VIN
4.7
F
5V
0V
5V
0V
ANY DC
0V
Figure 16. Power Supply and Input Connections for Single Supply Operation
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| VE-B0F-IY-F2 | CONVERTER MOD DC/DC 72V 50W |
| MAX260BENG+ | IC FILTER ACT MPU PROG 24-DIP |
| VE-B0F-IY-F1 | CONVERTER MOD DC/DC 72V 50W |
| VE-B0D-IY-F4 | CONVERTER MOD DC/DC 85V 50W |
| VE-B0D-IY-F3 | CONVERTER MOD DC/DC 85V 50W |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX261BENG+ | 功能描述:有源濾波器 MPU Programmable Universal RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
| MAX261BEWG | 功能描述:有源濾波器 RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
| MAX261BEWG+ | 功能描述:有源濾波器 MPU Programmable Universal RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
| MAX261BEWG+T | 功能描述:有源濾波器 MPU Programmable Universal RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
| MAX261BEWG-T | 功能描述:有源濾波器 RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
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