MAX9813H, MAX9813L：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

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.

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

MAX9812, MAX9812H, MAX9812L, MAX9813, MAX9813H, MAX9813L: Typical Operating Circuit

Applications/Uses

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

DataSheet

title	Download file
MAX9812-MAX9813L Data Sheet	MAX9812-MAX9813L.pdf

Parametrics

Part Number	Channels	V_SUPPLY (V)	V_SUPPLY (V)	I_Q (mA)	THD+N (%)	e_n (nV/√Hz)	PSRR (dB)	Input Type	Ext. Gain	Fxd. Gain (\|V/V\|)	Fxd. Gain (\|V/V\|)	Microphone Bias	Package/Pins	Budgetary Price
Part Number	Channels	min	max	typ	THD+N (%)	e_n (nV/√Hz)	min	Input Type	Ext. Gain	min	max	Microphone Bias	Package/Pins	See Notes
MAX9813H	2	4.5	5.5	0.23	0.015	40	100	Single Ended	No	10	10	Yes	SOT/8	$0.48 @1k
MAX9813L	2	2.7	3.6	0.23	0.04	40	100	Single Ended	No	10	10	Yes	SOT/8	$0.48 @1k

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX9813HEKA+	Active		SOT,;8 pin;9 mm²	-40°C to +85°C	Lead Free
MAX9813HEKA+T	Active		SOT,;8 pin;9 mm²	-40°C to +85°C	Lead Free
MAX9813HEKA-T	No Longer Available	MAX9813HEKA+T	SOT,;8 pin;9 mm²	-40°C to +85°C	No

MAX9812-MAX9813L.pdf MAX9813L