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TC9293AF
SUMM
TOSHIBA
TC9293AF/AFN/AN
TOSHIBA CMOS DIGITAL INTEGRATED CIRCUIT SILICON MONOLITHIC
TC9293AF, TC9293AFN, TC9293AN
E-A MODULATION SYSTEM DA CONVERTER WITH ANALOG FILTER
TC9293AF, TC9293AFN, TC9293AN are a 2'nd order E-d
modulation system 1-bit DA converter with a built-in 8
times over sampling digital filter and analog filter
developing for digital audio equipment. As this IC is
small package, SSOP24 (1.00mm, 0.65mm) and SDIP24,
and the analog filter has been incorporated, it is able to
output a direct analog wave form and construct small
the digital filter-the analog output unit at a low price.
FEATURES
Built in 8 times over sampling digital filter
Low voltage operate (2.7--5.5V)
Built-in digital de-emphasis filter
In serial mode, output amplitude can be set in 128steps of
resolution using microcontroller command.
In parallel mode, soft mute can be set for the output
signal in 64steps in 20ms.
Over sampling ratio (OSR) of E-A modulation circuit is
Support double speed operation
Sampling frequency : 32kHz, 44.1kHz, 48kHz
Built-in 3'rd order analog filter
Characteristics of the digital filter and DA converter are as
follows :
TC9293AF
SSOP24-P-300-1 .00
TC9293AFN
SSOP24-P-300-0.65A
TC9293AN
SDlP24-P-300-1.78
Weight
SSOP24-P-300-1.00 : 0.31g (Typ.)
SSOP24-P-300-0.65A : 0.14g (Typ.)
SDlP24-P-300-1.78 : 1.2g (Typ.)
2001 -06-1 9
TOSHIBA TC9293AF/AFN/AN
DIGITAL FILTER (fs=44.1kHz)
DIGITAL PASS-BAND TRANSIENT STOP BAND
FILTER RIPPLE BAND WIDTH SUPPRESSION
Standard Operation 8fs i0.11dB 20k--24.1kHz -26dB
Double Speed Operation 8fs 10.11dB 20k--24.1kHz -26dB
DA CONVERTER (VDD= 5V)
OSR DISTORTION S/N
Standard Operation 192fs -85dB (Typ.) 96dB (Typ.)
Double Speed Operation 96fs -85dB (Typ.) 86dB (Typ.)
PIN CONNECTION BLOCK DIAGRAM
- (SM) (EMP) (BS)
LRCK BCK DATA s ATT SHIFT LATCH VDX xo XI GNDX MCK
fic) f2 f2 (ii) (ii) (ii) fiis) fir) (ii) 65 fit) ®
V ty 2all LRCK
'il UzsuscK l 1 l I-l-l-i-l I 1H
PE E 3 22 El D_ATA Interface circuit PCON Interface OSC
VDA [4 21 [1 HS
RD E 5 20 " ATT(SM) 9 j
GNDA Es 190 SHIFT(EMP) Di it I me irc it
Igl a I r Clr UI
6N5: E; 13% \L/ATCMBS) ATT circuit Timing Gen.
LO E 9 16 a ng De-emphasis filter circuit
VDA Elo 15 L1 XI I
L/REH 14EIGNDx ' ' '
GNDD E12 13 n MCK E-d modulation circuit
Test l O_utp_ut Oytpyt l
circuit I curcwt circuit 'c",-
FL"1 l C l l
: Analog Analog l
l filter filter I
(D Q) (3) Q9 Q) LO Q) C?) Q) Q9 OJ Q9
VDD T1 PE VDA R0 GNDA VR GNDA Lo VDA LIE GNDD
2 2001-06-19
TOSHIBA TC9293AF/AFN/AN
PIN FUNCTION
PIN No. SYMBOL I/O FUNCTION REMARKS
1 VDD - Digital block power supply pin.
2 T1 I Test pin. Normally, use at "L".
3 p/T; I Parallel/serial mode select pin.
4 VDA - Analog power supply pin.
5 RO C) Right channel analog output pin.
6 GNDA - Analog ground pin.
7 VR - Reference voltage pin.
8 GNDA - Analog ground pin.
9 LO o L-ch analog output pin.
10 VDA - Analog power supply pin.
11 UK I LRCK polarity switching pin.
12 GNDD - Digital ground pin.
13 MCK 0 System clock output pin.
14 GNDX - Crystal oscillator ground pin.
15 XI I Crystal oscillator connection pin. $7
16 XO o Generates the clock required by the system. XI x0
17 VDX - Crystal oscillator power supply pin.
18 LATCH I Serial mode : Data latch signal input pin SHUMITT
(BS) Parallel mode : De-emphasis filter mode select pin. INPUT
19 SHIFT I Serial mode : Shift clock input pin SHUMITT
(EMP) Parallel mode : De-emphasis filter control pin. INPUT
20 ATT I Serial mode : Data input pin SHUMITT
(SM) Parallel mode : Soft mute control pin. INPUT
21 Ft!, I Standard/double speed operation control pin.
Standard operation at "H", double speed operation at "L".
22 DATA I Audio data input pin.
23 BCK I Bit clock input pin.
24 LRCK I LR clock input pin.
3 2001-06-19
TOSHIBA TC9293AF/AFN/AN
DESCRIPTION OF BLOCK OPERATION
Crystal oscillation circuit and timing generator
Clock required for internal operation can be generated when crystal and capacitors are connected
as shown in the following figure.
Further, this converter is also operable when system clock is input from the outside through XI pin
(pin®).
However, a through consideration is required in this case because noise distortion and S/N ratio of
the DA converter are largely affected by qualities of wave form such as jitter, rising and falling
characteristics, etc. of system clock.
c(,i,sci,-,
To the internal circuit
GNDX XI xo VDX MCK
il 15.9344MH2
C51 IICL CL--10--33PF
Use a crystal having a low Cl value and good statability.
Fig.1 Configuration of crystal oscillation circuit.
The timing generator generates clock required for the digital filter, de-emphasis filter, interpolation
filter and process timing signal.
Data input circu it
DATA and LRCK are taken in the shift register in the LSI at the rising edge of BCK.
As shown in the following timing example, it is therefore necessary to input DATA and LRCK in
synchronism with the falling edge of BCK.
Further, because DATA has been to designed that 16 bits before the change point of LRCK are
made effective data.
Fig.2a Example of input timing diagram (L/F: "L")
4 2001-06-19
TOSHIBA TC9293AF/AFN/AN
If BCK is 48fs or Mfs, please input data as follows.
BCK Cf I Jlfll I I I I I I I I J J I I I I I I I I Jlflf I I I I I I I I I I I I I I I I I I JT
Fig.2b Example of input timing diagram (L/A='1")
L/R channel data selection pin is Pino).
TabIe-1 Channel data
L/iT INPUT LRCK
H R-ch data L-ch data
L L-ch data R-ch data
5 2001-06-19
TOSHIBA TC9293AF/AFN/AN
3. Digital filter
Foldover noise component of the outside band is removed by the 8 times oversampling digital
filter.
Table-it Characteristics of the digital filter
Pass-band Transient Stop-Band
Ripple Bandwidth Suppression
Standafd 10.1 1dB 20.0k--24.1kHz - 26dB
Operation
Pub?. Speed 10.1 1dB 20.0k--24.1kHz - 26dB
Operation
Frequency characteristics of the digital filter are as follows : (Double speed operation is same)
- 10.00
- 20.00
- 30.00
- 40.00
- 50.00
Gain (dB)
Gain (dB)
.é s':
- 60.00
- 70.00
- 80.00
- 9000
-'"tl, 44.1 88.2 132.3 176.4 - 0 2.0 4.0 6.0 8.0 10012.0 14.016.018.0 20022.0 24.0
Frequency (kHz) Frequency (kHz)
Fig.3 Digital filter frequency characteristics (fs=44.1kHz)
6 2001-06-19
TOSHIBA TC9293AF/AFN/AN
4. De-emphasis filter
The built-in digital de-emphasis circuit is available for three kinds of sampling frequency, fs of
32kHz, 44.1kHz, and 48kHz. The selection is done as shown in the following table.
TabIe-3 Truth table for de-emphasis filter selection at
parallel mode
LATCH (BS) H H L L
SHIFT (EMP) H L L
MODE (fs SELECT) 32 48 44.1 OFF (kHz)
Digitization of the de-emphasis filter has eliminated the necessity for external parts such as resistor,
capacitor, analog switch, etc.
Further, to reduce the characteristic error of the de-emphasis filter, coefficients have been adjusted.
The construction and characteristics of the de-emphasis filter are shown below.
Input Data fi) ll>b0 fil
(b +b Z-I)
Transfer function : H (Z) ="'ir'"-'1e'l 1/T1 1/T2
(1-a12-1) T1=50ps,T2=15ps
Fig.4 Construction of HR type digital Fig.5 Filter characteristic
de-emphasis filter
5. DA conversion circuit
The 2'nd order E-A modulation system DA converter for 2 channels (simultaneous output type) has
been incorporated.
X(Z)_f+\ . [?YQ) Output data
(Bit stream 1 bit
DA conversion data)
2'nd order 2-d modulator: Y(Z)=X(Zrr(1-Z-1)2Q(2)
Fig.6 Construction of E-n modulation DA converter
7 2001-06-19
TOSHIBA TC9293AF/AFN/AN
It has been designed that clock for the E-A modulator is a half of master clock (MCK .' Crystal
oscillation clock) and the converter operates at 192fs at the standard operation.
The noise shaping characteristic is shown below.
Noise Power (dB)
I i l I I l
500k 1M
FREQUENCY (Hz)
Fig.7 Noise shaping characteristic
6. Output circuit
These ICs is built-in 3'rd order analog low pass filter.
These output is analog signal directly, RO (pin(h)) and LO (pin©) pins.
PDM signal i-Dis-
I l RO(LO)
Fig.8 Analog filter circuit
8 2001-06-19
TOSHIBA TC9293AF/AFN/AN
7. Soft mute circuit
This IC is a built-in soft mute circuit, it is possible to do soft mute, when SM pin is changed "L"
level to "H" level during parallel mode.
Characteristic of soft mute ON/OFF and DA converter output level is as follows.
While output level is changing, it is not possible to accept soft mute ON/OFF control.
SM terminal --l '-.
OFF l ON l OFF
DA converter I l
output level I :
l about 20ms l l about 20ms l
p—pl F—H
Fig.9 Soft mute DA converter output level
9 2001-06-19
TOSHIBA TC9293AF/AFN/AN
8. Description of internal control signal
Parallel and serial modes can be selected by the P/S pin. The controll functions are described as
follow.
8-1 Parallel mode (P/S pin =H)
In parallel mode, pinO, 19, © are set as follows.
TabIe-4 Pin names at parallel mode
PIN No. PIN NAME FUNCTION
18 BS De-emphasis filter mode select pin.
19 EMP De-emphasis filter control pin.
20 SM Soft mute control pin.
8-2 Serial mode (P/T terminal =L : For micro processor control use)
In serial mode, these ICs can be controlled by micro processor. The control function of pinO,
' © are as follows.
TabIe-5 Pin names at serial mode
PIN No. PIN NAME FUNCTION
18 LATCH Data latch signal input pin
19 SHIFT Shift clock signal input pin
20 ATT Data input pin
LATCH and ATT signals are entered to the shift register of the LSI at the rising edge of SHIFT
signal.
Also, LATCH signal should rise after a minimum of 1.5ps of the last data is shifted to the register.
If the shift pulse is changed while LATCH is Low, Mis-operation may occur. LATCH should be keep
at Low until after D7 is shifted into the register.
LATCH I t
$HlFTltltltltltltlflt
ATT 1rs0lo1lD2lo3lD4loslo6lDrl
A=more 1.5/15 B=more 1.5ps
Fig.10 Example for serial control mode data
10 2001-06-19
TOSHIBA TC9293AF/AFN/AN
In serial control mode, the control features are as follows.
When this IC's power is ON, all these data must be setting.
TabIe-6 Serial mode control
SERIAL INPUT DATA CONTROL SIGNAL
D7 0 1
D6 AT6 PBS
D5 ATS pEMP
D4 AT4 -
D3 AT3 -
D2 AT2 - ATO-6 2 Attenuation level setting
D1 AT1 - ,aBS : De-emphasis mode select
DO ATO - EMP : De-emphasis ON/OF select
C) Digital attenuator
D7= "L" is the command for digital attenuator. It can be set to 128 levels as show below.
TabIe-7 Audio output of attenuation data
ATTENUATION CONTROL DATA AUDIO OUTPUT
Dir-Do
7F (HEX) - 0.000dB
7E (HEX) - 0.069dB
01 (HEX) -42.076dB
00 (HEX) - CK)
The attenuation value can be calculated from input data as follow :
ATT= 208og (input data /127)dB
Example .' In case of attenuator=7A
ATT= 20tog (122 / 127)dB = - 0.349dB
© Digital De-emphasis filter
D7="H" is the command for Digital De-emphasis filter.
Table-8 De-emphasis filter setting
PBS H H L L
PEMP H L H L
MODE 32 48 44.1 OFF (kHz)
11 2001-06-19
TOSHIBA
MAXIMUM RATINGS (Ta = 25°C)
CHARACTERISTIC SYMBOL RATING UNIT
VDD -0.3--6.0
Supply Voltage VDA -0.3--6.0 V
VDX -0.r-6.0
Input Voltage Vin -th3--VDD+0.3 V
TC9293AF 200
P0122; tion TC9293AFN PD 200 mW
TC9293AN 300
Operating Temperature Topr - 35--85 °C
Storage Temperature Tstg - 55--150 ''C
TC9293AF/AFN/AN
ELECTRICAL CHARACTERISTICS (Unless otherwise specified, Ta = 25°c, VDD = VDX = VDA = 5V)
DC item
CHARACTERISTICS SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
. VDD 4.5 5.0 5.5
0 e at n S I
vs”; 'l l upp y VDX - Ta = -3r-85oc 4.5 5.0 5.5 v
g VDA 4.5 5.0 5.5
. VDD Ta = -1r-55oc 2.7 3.2 5.5
1','12t11)su'"'ly VDX - (Operation frequency ) 2.7 3.2 5.5 V
g l/DA 12MHzsfoprs18.5MHz 2.7 3.2 5.5
Power Dissipation IDD - XI =16.9MHz - 12 20 mA
"H" Level VIH VDDXO.7 - VDD
Input Voltage "L" Level VIL - o - vDon3 V
"H" Level IIH
- - - 1 A
Input Current "L" Level lit. 10 0 22
12 2001-06-19
TOSHIBA TC9293AF/AFN/AN
AC item (Over-sampling ratio-- 192fs)
CHARACTERISTICS SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
Table Harmonic 1kHz Sine wave, full-scale input
Distortion +Noise 1 THD+N1 1 VDD=VDX=VDA=5V - 85 80 dB
Table Harmonic 1kH2 Sine wave, full-scale input
Distortion +Noise 2 THD+N2 1 VDD=VDX=VDA=3.0V - -85 -78 dB
S/N Ratio S/N 1 88 96 - dB
. 1kHz Sine wave,
Dynamic Range DR 1 -60dB input conversion 90 95 - dB
Cross-talk CT 1 1kHz Sine wave, full-scale input - -95 -90 dB
Aout1 1kHz Sine wave, full-scale input - 1250 -
VDD = VDX = VDA = 5V
Analog Output Level 1 . . mVrms
1kHz Sine wave, full-scale input
Aout 2 - 750 -
VDD = VDX = VDA = 3.0V
Operating Frequency fopr - VDD =VDA =VDX 2 4.5V 10 16.9344 18.5 MHz
In ut Fre uenc fLR LRCK duty cycle=50% 30 44.1 100 kHz
p q y fBCK BCK duty cycle=50% 0.96 2.1168 4.3 MHz
Rise Time tr 0 a - - 15
Fall Time tf - LRCK, BCK (10% 90 An) - - 15 ns
Delay Time td - BCK_L Edge -9 LRCK, DATA - - 40 ns
13 2001-06-19
TOSHIBA TC9293AF/AFN/AN
0 TEST CIRCUIT 1 : Application circuit example is used.
DATA APPLICATION LOUT 20 kHz DISTORITION
s G BCK CIRCUIT EXAMPLE FACTOR
LRCK ROUT IDEAL LPF GAUGE
SG ANRITSU MG-22A or equivalent
LPF SHIBASOKU 725C built-in Filter
Distortion Factor Gauge :
SHIBASOKU 725C or equivalent
Measuring Item
Distortion factor gauge
filter setting A weight A weight : IEC-A or equivalent
THD + N, CT
S/N, DR
It AC CHARACTERISTIC STIPUL ATED POINT (Input signal : LRCK, BCK, DATA)
BCK -/-N-']
50% tr
10% 90%
DATA X
"To' td
APPLICATION CIRCUIT
—C MCK GNDD ( _
h h - 5V
" v GNDX L/R C)--)
18pF 5V
'I-s, L..." XI VDA y t , E
PT" a 8 , 2200
37:3}; I t t l-Cxo < LO C) - wv Jt O L-ch Analog
.. tL OUT
+ g F, "s o a
5V _O LATCH (BS) : VR D- '_-ti
u. 22yF
XI USHIFHEMP) < GNDA d t
EMPH is-l-; ',ATT(SM) RO w. C) R-ch Analo
(ir, ‘J t I 220n J/st Cl OUT 9
Ts —( HS u VDA sl-ISC-V,, + [IS t,
TC9236AF I- 5V N _-
Signal Processor AOUT —0 DATA " C)
for CD Player
BCK -C BCK T1 D"t I tt
CHCK —( LRCK cs, VDD -tr SV
14 2001-06-19
TOSHIBA TC9293AF/AFN/AN
PACKAGE DIMENSIONS
SSOP24-P-300-1.00 Unit : mm
[qpllqplplplppllqplprl d t"
jleTTHHHHHHHE4L
1.0TYP th4kth1 4ylt).Rtii)l
a 0:0 2
(300mil)
sr-,- 13.5MAX =
" 13.0i02
4*. N o
""“"“'m y
v.3. k
'r' " 0.525io.2
Weight : 0.31g (Typ.)
15 2001-06-19
TOSHIBA TC9293AF/AFN/AN
PACKAGE DIMENSIONS
SSOP24-P-300-0.65A Unit : mm
RflRRRilRRRRRfl d Tr
ii,i)njii 'file/tii-s-c-i-,-.-,-----,-.-,-'',-
0.325TYP " o.22+0.1
=1 ll" o 0.13
8.3MAX "
= 73:02 =
$1 tiii:.', a“?
tht. " e?
I'-.? l l 0.45Hh2
Weight : 0.149 (Typ.)
16 2001-06-19
TOSHIBA TC9293AF/AFN/AN
PACKAGE DIMENSIONS
SDlP24-P-300-1.78 Unit : mm
24 a Ci,
f-lf-lr-lf-lf-lr-II-li-?'-)),'-'").-) .
L-Jc.JLdL__.JLLc.JclL.-JclcJl._JLL ,
4 22.5MAX y
" NEE.»
_ 2. tD
A I l w Iii,! m
l. . l . .4 .
221TYP 4 ' -. 13:: v 0 t"t-h1ggo.atig
Weight : 1.2g (Typ.)
17 2001-06-19
TOSHIBA TC9293AF/AFN/AN
RESTRICTIONS ON PRODUCT USE
000707EBA
OTOSHIBA is continually working to improve the quality and reliability of its products.
Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent
electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer,
when utilizing TOSHIBA products, to comply with the standards of safety in making a safe
design for the entire system, and to avoid situations in which a malfunction or failure of such
TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified
operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please
keep in mind the precautions and conditions set forth in the "Handling Guide for
Semiconductor Devices," or "TOSHIBA Semiconductor Reliability Handbook" etc..
OThe TOSHIBA products listed in this document are intended for usage in general electronics
applications (computer, personal equipment, office equipment, measuring equipment, industrial
robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor
warranted for usage in equipment that requires extraordinarily high quality and/or reliability or
a malfunction or failure of which may cause loss of human life or bodily injury ("Unintended
Usage"). Unintended Usage include atomic energy control instruments, airplane or spaceship
instruments, transportation instruments, traffic signal instruments, combustion control
instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA
products listed in this document shall be made at the customer's own risk.
0 The products described in this document are subject to the foreign exchange and foreign trade
OThe information contained herein is presented only as a guide for the applications of our
products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of
intellectual property or other rights of the third parties which may result from its use. No
license is granted by implication or otherwise under any intellectual property or other rights of
TOSHIBA CORPORATION or others.
0 The information contained herein is subject to change without notice.
18 2001-06-19
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