TDA1548T データシートの表示（PDF） - Philips Electronics

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TDA1548T

Bitstream continuous calibration filter-DAC with headphone driver and DSP

Philips Electronics 

Philips Semiconductors

Bitstream continuous calibration filter-DAC

with headphone driver and DSP

Product specification

TDA1548T

DC CHARACTERISTICS

All voltages referenced to ground (pins 1, 11 and 24); VDDD = VDDA = VDDO = 3 V; Tamb = 25 °C, RL = 32 Ω (note 1);

common operational amplifier application; unless otherwise specified.

SYMBOL

PARAMETER

CONDITIONS

VDDD

VDDA

VDDO

IDDD

IDDA

IDDO

Ptot

digital supply voltage pin 10 note 2

analog supply voltage pin 23 note 2

opamp supply voltage pin 28 note 2

digital supply current

at digital silence

analog supply current

at digital silence

opamp supply current

at digital silence; note 3

total power dissipation

note 3

Digital inputs

VIH

HIGH level input voltage on

pins 5 to 9 and 12 to 17

VIL

LOW level input voltage on

pins 5 to 9 and 12 to 17

|ILI|

input leakage current on

pins 7 to 9 and 12 to 17

CI

input capacitance on

pins 5 to 9 and 12 to 17

MIN.

2.7

2.7

2.7

−

−

−

−

TYP.

3.0

3.0

3.0

4.5

4.5

6.0

50

MAX.

4.0

4.0

4.0

−

−

−

−

UNIT

V

V

V

mA

mA

mA

mW

0.7VDDD −

−

−

−

−

−

−

−

V

0.3VDDD V

10

µA

10

pF

Analog inputs pins ADVC, ADBB, ADTR and AD3S

RES

input resolution

−

−

6

bit

CI

input capacitance

RI

input resistance

−

10

−

pF

pins ADBB, ADTR and ADVC 1

−

−

MΩ

pin AD3S

−

20

−

kΩ

Analog reference pin ADref

VADref

RL(ADref)

reference voltage pin 18

reference output load pin 18

Analog audio pins

Vref

RO

RCONV

reference voltage pin 25

output resistance pin 25

current-to-voltage

conversion resistor

with respect to VSSO

IO(max)

CL

maximum output current

output load capacitance

(THD + N)/S < 0.1%

note 4

0.45VDDA 0.5VDDA 0.55VDDA V

3.0

−

−

kΩ

0.45VDDA 0.5VDDA 0.55VDDA V

−

3

−

kΩ

−

1.2

−

kΩ

−

35

−

mA

−

−

50

pF

Notes

1. RL is the AC impedance of the external circuitry connected to the audio outputs of the application circuit.

2. All power supply pins (VDD and VSS) must be connected to the same external power supply unit.

3. No operational amplifier load resistor.

4. Load capacitance greater than 50 pF, an inductor of 22 µH connected in parallel with a resistor of 270 Ω must be

inserted between the load and the operational amplifier output.

1995 Nov 15

11

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