MAX260, MAX261, MAX262 可由微处理器编程的通用开关电容滤波器

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The MAX260/MAX261/MAX262 CMOS dual second-order universal switched-capacitor active filters allow microprocessor control of precise filter functions. No external components are required for a variety of bandpass, lowpass, highpass, notch, and allpass configurations. Each device contains two second-order filter sections that place center frequency, Q, and filter operating mode under programmed control.

An input clock, along with a 6-bit f₀ program input, determine the filter's center or corner frequency without affecting other filter parameters. The filter Q is also programmed independently. Separate clock inputs for each filter section operate with either a crystal, RC network, or external clock generator.

The MAX260 has offset and DC specifications superior to the MAX261 and MAX262 and a center frequency (f₀) range of 7.5kHz. The MAX261 handles center frequencies to 57kHz, while the MAX262 extends the center frequency range to 140kHz by employing lower clock-to-f₀ ratios. All devices are available in 24-pin DIP and small outline packages in commercial, extended, and military temperature ranges.

关键特性

应用/使用

Filter Design Software Available
Microprocessor Interface
64-Step Center Frequency Control
128-Step Q Control
Independent Q and f₀ Programming
Guaranteed Clock to f₀ Ratio-1% (A grade)
75kHz f₀ Range (MAX262)
Single +5V and ±5V Operation

	µP调节滤波器
	自适应滤波器
	抗混叠滤波器
	数字信号处理(DSP)
	锁相环(PLL)
	信号分析

Key Specifications: Active Filters

Part Number

Filter Sections per Pkg.

Order per Filter Section

Filter Class

Filter Type

Filter Characteristic

Program Method

Lowest Cutoff (Hz)

Highest Cutoff (kHz)

Dual Supply Voltage (±V)

Supply Voltage (V)

Package

Smallest Available Package (max w/pins) (mm²)

RoHS Available

Operating Temp. Range (°C)

Price^**

MAX260

Switched Cap

Universal

Programmable

µP Bus

0.01

7.5

Ceramic DIP/24
PDIP/24
SOIC/24

166

Yes

-55 to +125
0 to +100
0 to +85

$6.49 @ 1k

MAX261

0.4

-40 to +85
-55 to +125
0 to +70

$6.51 @ 1k

MAX262

140

-40 to +85
-55 to +125
0 to +70

$7.49 @ 1k

See All Active Filters (45)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.