General Description
The EMA1003 is a fully differential audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1.2 watt of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5VDC power supply.
The EMA1003 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement.
The EMA1003 features a low-power consumption shutdown mode. To facilitate this, shutdown may be enabled by either logic high or low depending on mode selection. Driving the shutdown mode pin either high or low enables the shutdown select pin to be driven in a likewise manner to enable Shutdown. Additionally, the EMA1003 features an internal thermal shutdown protection mechanism.
The EMA1003 contains advanced pop & click circuitry which eliminates noises which would otherwise occur during turn-on and turn-off transitions.
The EMA1003 is unity-gain stable and can be configured by external gain-setting resistors.
Key Specifications
．Improved PSRR at 217Hz 70dB(typ)
．Power Output at 5.0V, 8Ω& 1% THD 1.2W(typ)
．Power Output at 2.6V,8Ω& 1% THD 300mW(typ)
．Shutdown current 0.1μA (typ)
Features
．Fully differential amplification
．Available packages MSOP
．Ultra low current shutdown mode
．Can drive capacitive loads up to 500 pF
．Improved pop & click circuitry eliminates noises during turn-on and turn-off transitions
．2.2 - 5.5V operation
．No output coupling capacitors, snubber networks or bootstrap capacitors required
．Unity-gain stable
．External gain configuration capability
．Shutdown high or low selectivity
．High CMRR
Applications
． Mobile phones
． PDAs
． Portable electronic devices
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Audio Power Amplifier > Class A/B |
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Part Number |
Description |
Po(Max output power, W) |
Typical THD+N (%) |
PSRR (dB) |
Vin min(V) |
Vin max(V) |
Shutdown current (uA) |
Earphone |
Package |
|
EMA1001 |
1W Mono |
1 (8ohm, 5V, 1%THD+N) |
0.04 (0.4W, 1KHz) |
60 |
2.2 |
5.5 |
0.1 |
N/A |
MSOP-8, SOP-8 |
|
EMA1002 |
1W Mono with Headphone Sense |
1 (8ohm, 5V, 1%THD+N) |
0.04 (0.4W, 1KHz) |
60 |
2.2 |
5.5 |
0.1 |
Yes |
MSOP-8 |
|
EMA1003 |
1.2W Mono Fully Differential with Shutdown Select |
1.2 (8ohm, 5V, 1%THD+N) |
0.008 (0.4W, 8ohm, 1KHz) |
70 |
2.2 |
5.5 |
0.1 |
N/A |
MSOP-10 (FD) |
|
EMA1901 |
1.25W Mono |
1.25 (8ohm, 5V, 1%THD+N) |
0.01 (0.4W, 1KHz) |
60 |
2.5 |
5.5 |
0.1 |
N/A |
WL-CSP |
|
EMA1903 |
1W Mono Fully Differential with Shutdown Select |
1 (8ohm, 5V, 1%THD+N) |
0.008 (0.4W, 8ohm, 1KHz) |
73 |
2.2 |
5.5 |
0.1 |
N/A |
WL-CSP |
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EMA2001 |
3W Mono with Shutdown mode |
3 (3ohm, 5V, 10%THD+N) |
0.02 (1W, 4ohm, 1KHz) |
60 |
2.6 |
5.5 |
0.1 |
N/A |
MSOP-8, TDFN-8 |
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EMA2004 |
2.7W Mono Fully Differential |
2.7 (4ohm, 5V, 10%THD+N) |
0.007 (0.6W, 8ohm, 1KHz, 3.6V) |
70 |
2.5 |
5.5 |
0.1 |
N/A |
MSOP-8, TDFN-8 |
|
EMA2901 |
2.5W Mono |
2.5 (4ohm, 5V, 10%THD+N) |
0.05 (1W, 4ohm, 1KHz) |
60 |
2.5 |
5.5 |
0.1 |
N/A |
WL-CSP | | |
