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AS1702-T

1.8W Single-Channel Audio Power Amplifiers

austriamicrosystems AG 

AS1702 - AS1705

Data Sheet - Electrical Characteristics

6 Electrical Characteristics

5V Operation

Table 4. Electrical Characteristics – 5V Supply, TAMB = +25ºC (unless otherwise specified)

Symbol

Parameter

Conditions

Min

Typ

VCC

Supply Voltage

TAMB = -40 to +85ºC

2.7

ICC

Supply Current 1

VIN- = VIN+ = VBIAS;TAMB = -40 to +85ºC

8

ISHDN Shutdown Supply

SHDN = SHDM = GND

0.05

VIH

SHDN, SHDM

VIL

Threshold

0.7 x VCC

Common-Mode Bias

VBIAS

Voltage 2

VCC/2 - 5% VCC/2

AV = 0dB (AS1703)

±1

VOS Output Offset Voltage VIN- = VIN+ = VBIAS AV = 3dB (AS1704)

±1

AV = 6dB (AS1705)

±1

AV = 0dB (AS1703) 0.2

VIC

Common-Mode Input

Voltage 3

Inferred from CMRR

Test

AV = 3dB (AS1704)

AV = 6dB (AS1705)

0.9

1.5

External Gain AS1702

1.5

RIN

Input Impedance

AS1703, AS1704, AS1705

10

15

CMRR

Common-Mode

Rejection Ratio

fN = 1kHz

-64

PSRR

Power Supply

Rejection Ratio

VIN- = VIN+ = VBIAS;

VRIPPLE = 200mVp-p;

RL = 8Ω; CBIAS = 1µF

f = 217Hz

f = 1kHz

-79

-73

POUT

Output Power 4

THD+N = 1%;

fIN = 1kHz

RL = 8Ω

RL = 4Ω

0.8

1.25

1.8

Total Harmonic

THD+N Distortion plus Noise 5

RL = 4Ω, fIN = 1kHz, POUT = 1.28W,

VCC = 5V, AV = 6dB

RL = 8Ω, fIN = 1kHz, POUT = 0.9W,

VCC = 5V, AV = 6dB

0.06

0.03

Gain Accuracy

AS1703, AS1704, AS1705

±1

Thermal Shutdown

Threshold

+145

Thermal Shutdown

Hysteresis

9

tPU

Power-up/Enable from

Shutdown Time

125

tSHDN

Shutdown Time

3.5

VPOP Turn-Off Transient 6

50

Max

5.5

10.4

1

0.3 x VCC

VCC/2 + 5%

±10

±15

±20

VCC - 0.2

VCC - 0.9

VCC - 1.5

VCC - 1.5

20

±2

Unit

V

mA

µA

V

V

mV

V

kΩ

dB

dB

W

%

%

ºC

ºC

ms

µs

mV

1. Quiescent power supply current is specified and tested with no load. Quiescent power supply current depends on

the offset voltage when a practical load is connected to the amplifier.

2. Common-mode bias voltage is the voltage on BIAS and is nominally VCC/2.

3. Guaranteed by design.

4. Guaranteed by design.

5. Measurement bandwidth for THD+N is 22Hz to 22kHz.

6. Peak voltage measured at power-on, power-off, into or out of SHDN. Bandwidth defined by A-weighted filters,

inputs at AC GND. VCC rise and fall times ≥ 1ms.

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Revision 1.47

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