Maxim > Products > Audio > MAX9812, MAX9813

MAX9812, MAX9813

Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain Microphone Amplifiers with Integrated Bias

Industry's Smallest, Low-Noise, Low-Power Microphone Amplifiers with Integrated Bias

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX9812/MAX9813 are single/dual-input, 20dB fixed-gain microphone amplifiers. They offer tiny packaging and a low-noise, integrated microphone bias, making them ideal for portable audio applications such as notebook computers, cell phones, and PDAs. These amplifiers feature a 500kHz bandwidth, rail-to-rail outputs, an industry-leading 100dB power-supply rejection ratio, and a very low 0.015% THD+N. Power-saving features include very low 230µA supply current and a total shutdown mode that cuts the combined supply and BIAS currents to only 100nA.

The MAX9812 is a single amplifier in a 6-pin SC70 package (2mm x 2.1mm) and the MAX9813 is a dual-input amplifier available in an 8-pin SOT23 (3mm x 3mm) package. The MAX9813 has two inputs allowing two microphones to be multiplexed to a single output.

The MAX9812/MAX9813 are offered in two grades. The MAX9812L/MAX9813L are optimized for 3.3V supply operation (2.7V to 3.6V). The MAX9812H/MAX9813H are PC2001 compliant and are optimized for 5V operation (4.5V to 5.5V). Both devices are specified over the -40°C to +85°C extended operating temperature range.

Data Sheet

Download	Rev 0	(PDF, 320kB)
E-Mail

Key Features

PC2001 Compliant
100dB at 217Hz Power-Supply Rejection Ratio
Very Low 230µA Quiescent Current
Low 0.015% THD+N
Available in Two Versions
- MAX9812L/MAX9813L—2.7V to 3.6V
- MAX9812H/MAX9813H—4.5V to 5.5V
Internal Low-Noise Microphone Bias Supply
- 2.3V for MAX9812L/MAX9813L
- 4.0V for MAX9812H/MAX9813H
100nA Low-Power Shutdown Mode
Rail-to-Rail Outputs
20dB Fixed Gain
Available in Tiny 6-Pin SC70 (2mm x 2.1mm) and 8-Pin SOT23 (3mm x 3mm) Packages
Extended Temperature Range -40°C to +85°C

Applications/Uses

Car Kit Adapters
Digital Cameras
Notebook Computers
PDAs
Smartphones
Video Tape Recorders

Key Specifications:

Microphone Amplifiers

Part Number

Channels

V_SUPPLY
(V)

I_Q
(mA)

THD+N
(%)

e_n
(nV/√Hz)

PSRR
(dB)

Input Type

Ext. Gain

Fxd. Gain
(|V/V|)

Microphone Bias

Budgetary Price

min

max

typ

min

max

See Notes

MAX9812H

4.5

5.5

0.23

0.015

100

Single Ended

Yes

$0.30 @1k

MAX9812L

2.7

3.6

0.04

$0.30 @1k

MAX9813H

4.5

5.5

0.015

$0.48 @1k

MAX9813L

2.7

3.6

0.04

$0.48 @1k

See All Microphone Amplifiers (14)

Pricing 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.

Diagram

Typical Operating Circuit

Application Notes

Application Note 4411		Headphone Attenuator Includes Microphone Monitor
Tutorial 4691		Introduction to Hearing Aids and Important Design Considerations
Tutorial 4694		Introduction to Digital Stethoscopes and Electrical Component Selection Criteria

Product Guides

Audio (PDF)

Video (PDF)

Reliability Reports

Reliability Report:	MAX9813.pdf
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Software/Models

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Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX9812HEXT+			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9812HEXT+T			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9812HEXT-T			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX9812LEXT+			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9812LEXT+T			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9812LEXT-T			Active	SC70;6 pin;5.3 mm² Outline Drawing:21-0077 (PDF) Land Pattern: 90-0189 (PDF) Use pkgcode/variation: X6SN-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX9813HEKA+			Active	SOT;8 pin;9 mm² Outline Drawing:21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9813HEKA+T			Active	SOT;8 pin;9 mm² Outline Drawing:21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9813HEKA-T			Active	SOT;8 pin;9 mm² Outline Drawing:21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8-1*	-40°C to +85°C	See data sheet
MAX9813LEKA+			Active	SOT;8 pin;9 mm² Outline Drawing:21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX9813LEKA+T			Active	SOT;8 pin;9 mm² Outline Drawing:21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9813LEKA-T			Active	SOT;8 pin;9 mm² Outline Drawing:21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8-1*	-40°C to +85°C	See data sheet

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; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product 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.

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More Information

Topmark Coding	MAX9812
Topmark Coding	MAX9813
New Product Press Release	[ 2003-05-19 ]

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Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Document Ref.: 19-2840 Rev 0; 2003-05-22
This page last modified: 2010-03-25