MAX7426, MAX7427 5th-Order, Lowpass, Elliptic, Switched-Capacitor Filters

Description

The MAX7426/MAX7427 5th-order, lowpass, elliptic, switched-capacitor filters (SCFs) operate from a single +5V (MAX7426) or +3V (MAX7427) supply. The devices draw only 0.8mA of supply current and allow corner frequencies from 1Hz to 12kHz, making them ideal for low-power post-DAC filtering and anti-aliasing applications. They can be put into a low-power mode, reducing supply current to 0.2µA.

Two clocking options are available: self-clocking (through the use of an external capacitor) or external clocking for tighter cutoff-frequency control. An offset-adjust pin allows for adjustment of the DC output level.

The MAX7426/MAX7427 deliver 37dB of stopband rejection and a sharp rolloff with a transition ratio of 1.25. Their fixed response limits the design task to selecting a clock frequency.

Key Features

Applications/Uses

5th-Order, Elliptic Lowpass Filters
Low Noise and Distortion: -80dB THD + Noise
Clock-Tunable Corner Frequency (1Hz to 12kHz)
Single-Supply Operation
- +5V (MAX7426)
- +3V (MAX7427)
Low Power
- 0.8mA (Operating Mode)
- 0.2µA (Shutdown Mode)
Available in 8-Pin µMAX®/PDIP Packages
Low Output Offset: ±4mV

	ADC Anti-Aliasing Filter
	Post-DAC Filtering Speech Processing

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)

Supply Voltage (V)

Operating Temp. Range (°C)

Price^**

MAX7426

Switched Cap

Lowpass

Elliptic

Clock

-40 to +85
0 to +70

$0.94 @ 1k

MAX7427

$0.94 @ 1k

See All Active Filters (50)

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.

Ordering Information

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-24 of 24

MAX7426

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX7426CPA

PDIP(N);8 pin;80 mm²
Outline Drawing: 21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8-1*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX7426CPA+

PDIP(N);8 pin;80 mm²
Outline Drawing: 21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8+1*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7426EPA

PDIP(N);8 pin;80 mm²
Outline Drawing: 21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8-1*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX7426EPA+

PDIP(N);8 pin;80 mm²
Outline Drawing: 21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8+1*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7426CUA

µMAX;8 pin;16 mm²
Outline Drawing: 21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX7426CUA-T

µMAX;8 pin;16 mm²
Outline Drawing: 21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX7426CUA+

µMAX;8 pin;16 mm²
Outline Drawing: 21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8+1*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7426CUA+T

µMAX;8 pin;16 mm²
Outline Drawing: 21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8+1*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7426EUA

µMAX;8 pin;16 mm²
Outline Drawing: 21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX7426EUA-T

µMAX;8 pin;16 mm²
Outline Drawing: 21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX7426EUA+

µMAX;8 pin;16 mm²
Outline Drawing: 21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8+1*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7426EUA+T

µMAX;8 pin;16 mm²
Outline Drawing: 21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8+1*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7427

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX7427CPA

PDIP(N);8 pin;80 mm²
Outline Drawing: 21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8-1*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX7427CPA+

PDIP(N);8 pin;80 mm²
Outline Drawing: 21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8+1*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7427EPA

PDIP(N);8 pin;80 mm²
Outline Drawing: 21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8-1*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX7427EPA+

PDIP(N);8 pin;80 mm²
Outline Drawing: 21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8+1*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7427CUA

µMAX;8 pin;16 mm²
Outline Drawing: 21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX7427CUA-T

µMAX;8 pin;16 mm²
Outline Drawing: 21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX7427CUA+

µMAX;8 pin;16 mm²
Outline Drawing: 21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8+1*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7427CUA+T

µMAX;8 pin;16 mm²
Outline Drawing: 21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8+1*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7427EUA

µMAX;8 pin;16 mm²
Outline Drawing: 21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX7427EUA-T

µMAX;8 pin;16 mm²
Outline Drawing: 21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX7427EUA+

µMAX;8 pin;16 mm²
Outline Drawing: 21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8+1*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7427EUA+T

µMAX;8 pin;16 mm²
Outline Drawing: 21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8+1*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis