MAX9814ETD Maxim Integrated Products, MAX9814ETD Datasheet

Page 1

... Available in the Space-Saving 12-Bump UCSP (1.5mm x 2mm) and 14-Pin TDFN (3mm x 3mm) Packages o -40°C to +85°C Extended Temperature Range PART Applications MAX9814EBC+T MAX9814ETD+T + Denotes a lead-free package. Pin Configurations appear at end of data sheet. UCSP is a trademark of Maxim Integrated Products, Inc. 2.7V TO 5.5V V SHDN ...

Page 2

Microphone Amplifier with AGC and Low-Noise Microphone Bias ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0.3V to +6V DD All Other Pins to GND.................................-0. Output Short-Circuit Duration.....................................Continuous Continuous Current (OUT, MICBIAS) .............................±100mA All Other Pins ....................................................................±20mA Stresses beyond those ...

Page 3

Microphone Amplifier with AGC and ELECTRICAL CHARACTERISTICS (continued) = 3.3V, SHDN = 470nF +25°C.) (Note 1) A PARAMETER SYMBOL MICOUT High Output Voltage MICOUT Low Output Voltage MICOUT ...

Page 4

Microphone Amplifier with AGC and Low-Noise Microphone Bias ( 470nF 2.2µ +25°C, unless otherwise noted.) A GAIN vs. FREQUENCY 80 GAIN = UNCONNECTED ...

Page 5

Microphone Amplifier with AGC and ( 470nF 2.2µ +25°C, unless otherwise noted.) A MICBIAS NOISE vs. FREQUENCY 10,000 1000 100 10 10 100 1k 10k 100k FREQUENCY (Hz) ...

Page 6

Microphone Amplifier with AGC and Low-Noise Microphone Bias ( 470nF 2.2µ +25°C, unless otherwise noted.) A HOLD AND RELEASE TIME V MICOUT 500mV/div 0V 40ms/div PIN NAME TDFN ...

Page 7

Microphone Amplifier with AGC and Detailed Description The MAX9814 is a low-cost, high-quality microphone amplifier with automatic gain control (AGC) and a low- noise microphone bias. The MAX9814 consists of sever- al distinct circuits: a low-noise preamplifier, a variable gain ...

Page 8

Microphone Amplifier with AGC and Low-Noise Microphone Bias HOLD ATTACK RELEASE 0V 0V 10ms/div Figure 2. Input Burst Exceeding AGC Limit The attack time is the time it takes for the AGC to reduce the gain after the input signal ...

Page 9

Microphone Amplifier with AGC and Setting the AGC Threshold To set the output-voltage threshold at which the micro- phone output is clamped, an external resistor-divider must be connected from MICBIAS to ground with the out- put of the resistor-divider applied ...

Page 10

Microphone Amplifier with AGC and Low-Noise Microphone Bias BIAS C BIAS 0.47µF MICBIAS R MICBIAS 2.21kΩ MICIN C IN 0.1µ 47nF 2.2µF *THE DEVICE HAS BEEN CONFIGURED WITH AN ATTACK TIME OF 1.1ms, 40dB ...

Page 11

Microphone Amplifier with AGC and TOP VIEW (BUMP SIDE DOWN) MAX9814 SHDN A/R C MICBIAS BIAS GAIN UCSP ______________________________________________________________________________________ Low-Noise Microphone Bias TOP VIEW 4 MICOUT GND MICIN PROCESS: BiCMOS ...

Page 12

Microphone Amplifier with AGC and Low-Noise Microphone Bias (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) 12 ______________________________________________________________________________________ Package Information PACKAGE OUTLINE, 4x3 UCSP 1 ...

Page 13

Microphone Amplifier with AGC and (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) ______________________________________________________________________________________ Low-Noise Microphone Bias Package Information (continued) 13 ...

Page 14

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2007 Maxim Integrated Products ...