TA2028F / P
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA2028F,TA2028P
Filter IC For
Σ−∆
Modulation System DA Converter
TA2028F, TA2028P are an analog filter IC for
Σ−∆
modulation
system DA converter.
Using the TA2028F, TA2028P in combination the TC9237BF,
TC9237BN (the
Σ−∆
modulation system DA converter with a
built−in digital filter), it is possible to construct a DA conversion
system with less external parts.
Features
·
·
·
Built−in CR for LPFs and output (differential) amplifiers for
the left and right channel.
Single power supply operation.
(+9V operation: BS tuner system)
Noise distortion factor and S / N ratio are as follows
(when operating at +5V single power supply):
Noise distortion factor:
−86dB
(typ.)
S / N:
100dB
(typ.)
Pin Connection
(top view)
Weight
SSOP16−P−225−1.00A: 0.14g (typ.)
DIP16−P−300−2.54A: 1.00g (typ.)
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TA2028F / P
Block Diagram
Description Of Pin Functions
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Symbol
RI +
GND
RO
VRI
NC
LO
V
CC
LI +
GND9
LI
LI
GND12
GND13
RI
RI
GND16
I/O
I
—
O
—
—
O
—
I
—
I
I
—
—
I
I
—
Function & Operation
R channel operational amplifier forward input pin.
Connect to VRI.
Ground pin.
R channel analog output pin.
Reference voltage pin. (V
CC
/ 2)
Non-connecting pin. NC pin is used in the open state.
L channel analog output pin.
Supply voltage pin.
L channel operational amplifier forward input pin.
Connect to VRI.
Ground pin for L channel reverse input side filter.
L channel forward input pin.
L channel reverse input pin.
Ground pin for L channel forward input side filter.
Ground pin for R channel forward input side filter.
R channel reverse input pin.
R channel forward input pin.
Ground pin for R channel reverse input side filter.
Remarks
—
—
—
See the block diagram
—
—
—
—
—
Connect to LO of
TC9237BF, TC9237BN
Connect to LO of
TC9237BF, TC9237BN
—
—
Connect to RO of
TC9237BF, TC9237BN
Connect to RO of
TC9237BF, TC9237BN
—
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TA2028F / P
Maximum Ratings
(Ta = 25°C)
Characteristic
Supply voltage
Power dissipation
TA2028F
TA2028P
Symbol
V
CC
P
D
T
opr
T
stg
Rating
11
350 (*)
1388 (**)
-25~75
-55~150
Unit
V
mW
°C
°C
Operating temperature
Storage temperature
(*) Reduce 2.8mW / °C at Ta = above 25°C.
(**) Reduce 11.2mW / °C at Ta = above 25°C.
Electrical Characteristics
(unless otherwise specified, V
CC
= 5V, Ta = 25°C)
Characteristic
Operating supply
voltage
Operating supply
current
Reference voltage
Symbol
V
CC
I
CCQ
VRI
THD (1)
Noise distortion factor
THD (2)
THD (3)
Cross talk
Attenuation
Max. output level
Differential balance
LR output difference
CT
ATT (1)
ATT (2)
V
omax
G
VB
G
VD
1
1
1
1
1
1
Test
Cir-
cuit
—
—
—
Test Condition
Ta =
-35~85°C
At no signal
—
1kHz, V
o
= 2mV
rms
10kHz, V
o
= 2mV
rms
1kHz, V
o
= 100mV
rms
1kHz, V
o
= 2mV
rms
40kHz, V
o
=
-10dBV
rms
80kHz, V
o
=
-10dBV
rms
1kHz, THD = 1%
1kHz, 1.1dBV
rms
In-phase input
1kHz, 1.1dBV
rms
Differential input
Min.
8.0
8.1
4.4
—
—
—
—
0.51
1.50
2.5
—
—
Typ.
9.0
11.0
4.5
-86
-86
-74
-100
0.71
2.70
2.6
—
0
Max.
10
13.7
4.6
-83
-83
-70
-90
1.41
4.50
—
-40
0.5
dB
dB
V
rms
dB
dB
dB
Unit
V
mA
V
(Note 1) When the TC9327BF, TC9237BN (+5V) and +9V single power supply are operated
: Full scale = 2mV
rms
(typ.).
(Note 2) The amount of attenuations is based on 1kHz, V
o
=
-10dBV
rms
.
(Note 3) Measuring circuit-1: Indicates the measuring circuit.
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TA2028F / P
Test Circuit-1
-
SW
1
L
L
H
H
H
SW
2
L
H
L
H
H
SW
3
—
L
L
L
H
Measuring Item
Operating supply voltage, reference voltage
Cross talk (R→L)
Cross talk (L→R)
Noise distortion factor, attenuation, maximum output
level, LR output difference
Difference balance
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TA2028F / P
Application Circuit Example
(Cautions)
·
Quality of crystal oscillation waveform largely effects S / N ratio.
Further, this is also true when system clock is input externally through the XI pin of pin(16).
·
Suppress glitch of input signals (LRCK, BCK, DATA) as could as possible.
·
The wiring between the TC9237BF, TC9237BN output and the analog filter amplifier input must be made the
shortest
·
The capacitor between V
DA
and GNDA shall be connected as close to the pin as possible.
·
NC pin is used in the open state.
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