TA2123AF
2002-10-30
1
TOSHIBA Bipolar Integrated Circuit Silicon Monolithic
TA2123AF
1.5V Stereo Headphone Amplifier
The TA2123AF is the system amplifier IC which is developed
for playback stereo headphone equipments. It is built in dual
auto-reverse preamplifiers, dual power amplifiers with bass /
treble boost function, AMS (automatic music sensor) function,
beep function, AGC for power amplifier etc.
Features
Power amplifier stage
In case of output coupling type, the supply current
decreases.
(built-in center amplifier switch)
Built-in bass boost function
Built-in treble boost function
Built-in power amplifier muting function
Built-in input terminal for beep signal
Built-in input capacitor for reducing buzz noise
G
V
= 24dB (typ.)
Built-in AGC circuit (in case of boost mode, this circuit operates.)
Low supply current
(V
CC
= 1.3V, f = 1kHz, R
L
= 32, Ta = 25C, typ.)
No Signal
0.1mW 2
0.5mW 2
Output coupling type
1.5mA
3.0mA
5.0mA
OCL type
2.2mA
4.9mA
8.6mA
Preamplifier stage
Auto-reverse compatible
Built-in input capacitor for reducing buzz noise
Input coupling condensor-less
Built-in metal mode drivers
Preamplifier muting function
Built-in ripple filter circuit
Built-in AMS (automatic music sensor) function (mixer amplifier and level comparator)
Built-in power switch
Operating supply voltage range (Ta = 25C)
V
CC (opr)
= 0.95~2.2V
Weight: 0.17g (typ.)
TA2123AF
2002-10-30
2
Block Diagram
OUT
C
AGC
DET
36
35 34 33 32
31
30
29
28
27
26
25
1
2 3 4 5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
V
REF OUT
DE
T
AG
C I
N
+
-
BST
N
F
BST
O
U
T
PW
I
N
C
LP
F
EQ
A
PW
N
F
A
PW
I
N
A
PW
I
N
B
PW
N
F
B
EQ
B
RF IN
BEEP
BST
+
-
PWC
PWB
+
-
+
-
PW GND
OUTB
RL
RL
OUTC
OUT
A
V
CC
-
+
PWA
+
-
RIPPLE
FILTER
BASE
RF OUT
-
+
+
-
GND
AMS DET
V
REF OUT
AMS MIX
AMS SW
MIX
+
-
COMP
+
-
MTL DRV
AM
S IN
+
-
PRE NF
B
PRE O
U
T
B
M
T
L
DRV
B
M
T
L
DRV
A
PR
E O
U
T
A
PR
E N
F
A
IN
A
-
R
IN
B
-
R
V
REF
OUT
IN
B
-
F
IN
A
-
F
+
-
-
+
V
REF OUT
V
REF OUT
PRE
B
+
-
PRE
A
+
-
V
REF
SW
V
REF IN
+
-
PRE GND
NOR
M / N SW
ON
PRE SW
FWD
RF OUT
F/R SW
BST SW
OFF
PW SW
ON
V
CC
MT SW
OFF
RF OUT
AMS OUT
BEEP
MT TC
- +
OFF C
-
AMP SW
TA2123AF
2002-10-30
3
Terminal Explanation
(terminal voltage: Typical terminal voltage at no signal with test circuit, V
CC
= 1.3V,
Ta = 25C)
Terminal
No. Name
Function Internal
Circuit
Terminal
Voltage
(V)
1 IN
A
-F
2 IN
B
-F
4 IN
B
-R
5 IN
A
-R
Input of preamplifier
F / R SW (pin 44)
"L" level: Pin 1 / 2
"H" level: Pin 4 / 5
Refer to application note 3 (2)
0.73
6 PRE
NF
A
11 PRE
NF
B
NF of preamplifier
1
6
5
FWD
VREF OUT
REV
5pF
10pF
5pF 10pF
500
500
FWD REV
0.7
3 V
REF OUT
Output
of
reference
circuit
48 V
REF IN
Input of reference circuit
48
3
+
-
+
-
0.73
7 PRE
OUT
A
10 PRE
OUT
B
Output of preamplifier
7
0.44
8 MTL
DRV
A
9 MTL
DRV
B
Metal driver terminal
On resistance: 90 (typ.)
8
--
12 AMS
IN
Input of mixer amplifier for AMS
signal
0.7
14 AMS
MIX
Output of mixer amplifier for AMS
signal
14
12
V
REF OUT
0.7
13 AMS
SW
AMS sensitivity changeover switch
(this switch synchronizes with the
MT SW)
13
V
REF OUT
MT SW ON : CURRENT SOURCEON
MT SW OFF : CURRENT SOURCEOFF
--
TA2123AF
2002-10-30
4
Terminal
No. Name
Function Internal
Circuit
Terminal
Voltage
(V)
15 AMS DET
Input of AMS comparator circuit
0.73
40 AMS
OUT
Output of AMS comparator circuit
High level: Rectangular pulse
Low level: "H"
V
REF OUT
15
40
--
16 GND
--
--
0
17 RF
OUT
Output of ripple filter
Ripple filter circuit supplies
internal circuit except power
drive stage with power source
1.22
18 BASE
Base biasing terminal of transistor
for ripple filter
0.5
19 V
CC
--
1.3
24 RF
IN
Ripple
filter
terminal
V
CC
RF OUT
-
+
+
-
46.
5k
24
19
18
17
1.23
20 OUT
A
22 OUT
B
Output of power amplifier
0.56
26 PW
NF
B
29 PW
NF
A
NF of power amplifier
0.73
27 PW
IN
B
28 PW
IN
A
Input of power amplifier
(this terminal also has function of
an ADD amplifier input.)
to ADD amplifier
V
REF OUT
V
REF OUT
30k
2k
20k
20k
28
29
20
0.73
21 OUT
C
Output
of
center
amplifier
0.56
32 PW
IN
C
Input of center amplifier
V
REF OUT
V
REF OUT
30k
2k
20k
32
21
0.73
23 PW GND
Power GND for power drive stage
--
0
25 EQ
B
30 EQ
A
Equalizer circuit (this circuit
synchronizes with the BST SW)
Input impedance
: 1.9 (typ.)
1.8k
100k
30
--
TA2123AF
2002-10-30
5
Terminal
No. Name
Function Internal
Circuit
Terminal
Voltage
(V)
31 LPF
Low pass filter terminal of bass boost
PW IN
20k
20k
10k
10k
V
REF OUT
31
0.73
33 BST OUT
Output of boost amplifier
0.73
34 BST NF
NF of boost amplifier
34
33
V
REF OUT
20k
10k
100k
V
REF OUT
0.73
35 AGC
IN
Input of boost AGC circuit
The input level to the boost
amplifier is controlled by the input
level
of
this
terminal.
Input impedance: 10k (typ.)
VREF OUT
OUTC
10k
- +
35
0.73
36 DET
Smoothing terminal of boost AGC
circuit
-
+
36
--
37 C-AMP
SW
Center amplifier on / off switch
Output type of power amplifier
OCL
type:
OPEN
(C
-AMP ON)
Output coupling type: GND
(C
-AMP OFF)
37
Center amplifier
--
38 MT
TC
Smoothing terminal of MT SW
In order to reduce a pop noise at
power amplifier on / off switching
38
-
+
10
A
0.7
TA2123AF
2002-10-30
6
Terminal
No. Name
Function Internal
Circuit
Terminal
Voltage
(V)
39 BEEP
Input of beep signal
This terminal receives beep
signal of a microcomputer etc.
This terminal should be set as
high impedance or "H" when
not using this function
Power amplifier
20k
39
0.7
41 MT
SW
Muting switch of power amplifier
Power amp. on: "H" level
Power amp. off: "L" level
Refer to application note 3 (2)
--
44 F / R SW
Forward / reverse switch
Forward: "L" level
Reverse: "H" level
Refer to application note 3 (2)
--
45 PRE
SW
Muting switch of preamplifier
Preamp. on: "L" level
Preamp. off: "H" level
Refer to application note 3 (2)
41
47k
--
42 PW
SW
Power on / off switch
IC on: "H" level
IC off: "L" level
Refer to application note 3 (2)
42
47k
--
43 BST
SW
Boost on / off switch
BST on: OPEN / "H" level
BST off: "L" level
Refer to application note 3 (2)
43
20k
--
46 M / N SW
Metal / normal mode switch
Metal mode: OPEN / "H" level
Normal mode: "L" level
Refer to application note 3 (2)
46
10k
--
47 PRE GND
Power GND for power drive stage
--
0
TA2123AF
2002-10-30
7
Application Note
1. Preamplifier stage
(1) Output DC voltage of preamplifier
Output DC voltage of preamplifier is determined
by external resistors R1 and R2 as shown in Fig.1.
V
O (PRE)
= V
REF OUT
-V (R2 / R1 + 1)
Fig.1 Output DC voltage of preamplifier
V
REF OUT
= 0.73V (typ.)
V is an offset voltage which is designed to 28.6mV.
It is as follows in case that the DC voltage is calculated by the constant of a test circuit.
V
O (PRE)
= 0.73V-28.6mV (200k / 22k + 1)
=0.44V
Output DC voltage of preamplifier should be fixed about V
CC
/ 2, because preamplifier get a enough
dynamic range.
(2) AMS (automatic music sensor) function
A block diagram is shown in Fig.2. This function can AMS (automatic music sensor) and BS (blank skip).
The comparator input level is higher than comparator sensitivity.
Rectangle wave is outputted.
The comparator input level is lower than comparator sensitivity.
High level is outputted.
The sensitivity changeover is determined by AMS switch (the comparator sensitivity doesn't change.).
Automatic music sensor mode
The AMS SW is also turned on when the MT SW is turned on. And the comparator input level is
determined by external resistors (R4~R6) and capacitors (C3, C4) from mixer amplifier output
level.
The transfer function is as follows.
V
O
/ V
i
= R3 / [R1R2 / (R1 + R2)] {jC4R5R6 / [R4R5 + j (C3R4R5 + C4R4R5 +
C4R4R6 + C4R5R6) -
2
C3C4R4R5R6]}
+
-
V = 28.6mV
V
REF OUT
R1
R2
+
-
TA2123AF
2002-10-30
8
Blank skip mode
The AMS SW is also turned of when the MT SW is turned off. And the comparator input level is
determined by external resistors (R4, R6) and capacitors (C3, C4) from mixer amplifier output
level.
The transfer function is as follows.
V
O
/ V
i
= R3 / [R1R2 / (R1 + R2)] {jC4R6 / [1 + j (C3R4 + C4R4 + C4R6) -
2
C3C4
R4R6]}
Fig.2 AMS
system
V
REF OUT
V
REF OUT
MIX
+
-
COMP
C1 R1
C2 R2
PRE OUT
AMS
IN
AMS
MIX
R5
R3
R4
C3
C4
AMS
SW
AMS
DET
V
REF OUT
R6
AMS
OUT
R7
V
CC
Synchronizes with the MT SW
12
14
13
15
40
TA2123AF
2002-10-30
9
2. Power amplifier stage
(1) Input of power amplifier
Each input signal should be applied through a capacitor. In case that DC current or DC voltage is applied
to each amplifier, the internal circuit has unbalance and the each amplifier doesn't operate normally.
It is advised that input signal refer to V
REF
voltage, in order to reduce a pop noise or low frequency leak.
(2) Output application
This IC can chose the output coupling type and OCL type. The C-AMP SW should be connected to GND
in case that the output coupling type is chosen. The supply current decreases when not using the bass
boost function.
(3) Bass boost function
(a) System
This IC has the bass boost function in power amplifier stage. After this system adds the low frequency
ingredient of side amplifier, it is applied into the center amplifier. And the bass boost level is controlled
by the variable impedance circuit (Fig.3)
Flow of the bass boost signal
Variable impedance circuitBoost amplifierCenter amplifier
Flow of the bass boost level
Output of center amplifierAGC DET (level detection)
Variable impedance circuit operation
The system of treble boost function is realized by frequency characteristic adjustment of the side
amplifier.
Fig.3 Bass boost system
Ra
Ra
C1
C6
+
-
Flow of the bass boost signal
AGC
DET
ATT
BST
Rc
R1 C2
C5 Rb
C3
Rd
C4
PW
B
PW
A
PW
C
R
L
R
L
Flow of the Bass boost level
27
28
31
36
35
34
33
32
20
21
22
- +
TA2123AF
2002-10-30
10
(b) AGC circuit
The AGC circuit of bass boost function is realized by the variable impedance circuit. The AGC DET
circuit detects the low frequency level of center amplifier. When this level becomes high, the variable
impedance circuit operates, and this circuit attenuates the input level of center amplifier.
The AGC DET circuit is the current input, so that the output voltage of ADD amplifier is changed into
the current ingredient by resistor Rb and capacitor C5 which are shown in Fig.3. And it is smoothed
and detected by DET circuit (pin 36). And the direct current should not be applied to the AGC IN
circuit, because, as for the circuit, the sensitivity setup is high.
Moreover, the AGC signal level is decreased in case that the resistor R5 is connected with the
capacitor C5 in series. And the AGC point can be changed. But the center amplifier is clipped in the
low frequency in case that the resistor R5 is larger.
(c) Bass boost
The signal flow of bass boost function is as follows, refer to Fig.4.
LPF (internal resistors 2R1 and external capacitor C1)
ATT (variable impedance circuit)
HPF (BST amplifier)
BPF (LPF: internal resistor R4 and external capacitor C3, HPF: external capacitor C4 and internal
resistor
R5)
Center amplifier
The center amplifier signal becomes the reverse phase, because the phase of audio frequency range
is reversed with two LPFs.
Fig.4 Block diagram of bass boost
20k
20k
2R1
2R1
ATT
C1
C2 R3
BST
R2 = 100k
R4 = 20k
+
-
C3
C4
R5
20k
PW
A
PW
C
R
L
27
28
31
34
33
32
20
21
A
2
G
3
()
BPF
G
2
()
HPF
A
1
G
1
()
LPF
TA2123AF
2002-10-30
11
The transfer function of bass boost is as follows from Fig.4.
G () = G
1
()A
1
G
2
()G
3
()A
2
The bass boost effect is changed by external resistor or external capacitor. The transfer function and cut
off frequency are as follows.
(1) Transfer function of LPF
G
1
() = 1 / (1 + jC1R1)
f
L
= 1 / 2C1R1
(2) Transfer function of BPF
G
3
() = jC4R5 / [1 + j (R4C3 + R5C3 + C4R4) -
2
R4C3R5C4]
C4
R5
C3
R4
2
/
1
O
f
p
=
(3) HPF gain and cut off frequency
G
2
() = 1 + R2 / (R3 + 1 / jC2)
f
HC
= 1 / (2
F
R3C2)
Fig.5 BPF
Graph.1 Characteristic of bass boost
(4) f
O
and f
L
The f
L
and f
O
should be set up out of the audio frequency range. In case that the f
O
and f
L
is inside
of audio frequency range and AGC circuit operates, the voltage gain decrease.
(5) HPF
The f
HC
should be made 1 / 2 or less frequency as compared with the f
L
or f
O
. The phase difference
is large near the f
HC
, so that the bass boost level runs short. And the HPF gain of middle or high
frequency range should be set to 10dB or more.
A
Ra Rb
Ca
Cb
Frequency f (Hz)
R
e
sp
ons
e (
d
B
)
30
-30
3
20
10
0
-10
-20
10 100
300
Total characteristic
HPF
fL
fO
LPF
BPF
TA2123AF
2002-10-30
12
(4) Treble boost
The EQ terminal is synchronizes with the BST SW, and the input impedance is changed.
BST OFF: 100k (typ.)
BST ON: 1.9k (typ.)
The voltage gain increase 6 dB (typ.) at high frequency range in case that the capacitor CX is connected
between the EQ terminal and the PW NF terminal.
Fig.6 Treble
boost
(5) Cross talk of output coupling type
In case of output coupling mode, the cross talk is determined by resistor R
L
and capacitor C which are
connected with power amplifier output as shown in Fig.7.
The formula is shown below.
G () = 1 / 2 [1 + jC (R
L
/ 2)]
CT = 20og|G
v
| = 20og [1 / 2 [
2
)
0
/
(
1
w
w
+
]],
0
= 1 / C (R
L
/ 2)
At f = 1kHz, C1 = 220F, R
L
= 32, The cross talk becomes about 33 dB.
Fig.7 Cross talk of output coupling type
PW IN
PW NF
EQ
C
X
PW
A / B
+
-
28
29
30
PWA
PWC
PWB
R2
R
L
R
L
+
-
C
+
-
C
R
L
R
L
V
REF
~
TA2123AF
2002-10-30
13
3. Total
(1) Ripple filter
It is necessary to connect a low saturation transistor (2SA1362 etc.) for ripple filter, because this IC
doesn't have transistor for ripple filter. Care should be taken to stabilize the ripple filter circuit, because
the ripple filter circuit supplies internal circuit except power drive stage with power source.
(2) Switch terminal
(a) PW SW
It is necessary to connect an external pull-down resistor with terminal PW SW, in case that this IC is
turned on due to external noise etc. (The PW SW sensitivity is designed highly.)
(b) MT SW, BST SW, F / R SW, PRE SW, M / N SW
The current flows through terminals of MT SW, BST SW, PRE SW and M / N SW, in case that these
terminals are connected with V
CC
line independently, even though the PW SW is off-mode. It is
necessary to connect an external pull-down resistor with each terminals in case that IC is turned on
due to external noise etc. These switches are designed highly.)
The pop noise at turning on / off MT SW can be reduced by the external capacitor of the MT TC
terminal.
(c) C-AMP SW
The C-AMP SW terminal should not be connected with high voltage of V
CC
etc., because internal
circuit is broken.
(d) Sensitivity voltage of each switch (Ta = 25C)
MT SW (V
41
) F / R SW (V
44
) PRE
SW
(V
45
) PW SW (V
42
)
'H'
Muting OFF
REV mode
Preamp. OFF
IC ON
'L'
Muting ON
FWD mode
Preamp. ON
IC OFF
BST
SW
(V
43
) M / N SW (V
46
)
'H', open
BST ON
Metal mode
'L' BST
OFF
Normal
mode
(1) MT SW,F / R SW,PRE SW,PW SW
Supply voltage (V)
T
e
r
m
i
nal
vol
t
ag
e V
41,
V
44,
V
45,
V
42
(V
)
2.5
0
2
1.5
1
0.5
1 1.5 2 2.5
2.2V
0.8V
0.3V
H
L
(2) BST SW,M / N SW
Supply voltage (V)
T
e
r
m
i
nal
vol
t
ag
e V
43,
V
46
(V
)
2.5
0
2
1.5
1
0.5
1 1.5 2 2.5
2.2V
0.8V
0.3V
H
L
TA2123AF
2002-10-30
14
(3) Capacitor
Small temperature coefficient and excellent frequency characteristic is needed by capacitor below.
Oscillation preventing capacitors for power amplifier output
Capacitor between V
REF
and GND
Capacitor between V
CC
and GND
Capacitor between RF OUT and GND
Maximum Ratings
(Ta = 25C)
Characteristic Symbol
Rating
Unit
Supply voltage
V
CC
4.5 V
Output current (PW AMP.)
I
O (peak)
100 mA
Power dissipation
P
D
(Note)
750
mW
Operating temperature
T
opr
-25~75 C
Storage temperature
T
stg
-55~150 C
Note: Derated above Ta = 25C in proportion of 6mW / C
TA2123AF
2002-10-30
15
Electrical Characteristics
Unless Otherwise Specified: V
CC
= 1.3V, Ta = 25C, f = 1kHz, SW1: b, SW2: b, SW3: a,
SW4: OPEN SW5: a, SW6: a, SW7: ON, SW8: a / b, SW9: b,
SW10:
ON
Preamplifier: Normal Mode, R
g
= 2.2k, R
L
= 10k, SW1: a
Power Amplifier: R
g
600, R
L
= 32, SW2: a
Characteristic Symbol
Test
Cir
-
cuit
Test Condition
Min.
Typ.
Max.
Unit
Quiescent supply current 1
I
CCQ1
--
OCL mode, PRE + PW
--
2.2
4.0
Quiescent supply current 2
I
CCQ2
--
OCL mode, PRE: OFF
SW9: a
-- 1.7 3.0
Quiescent supply current 3
I
CCQ3
--
Coupling mode
PRE + PW, SW4: ON
-- 1.5 2.7
Quiescent supply current 4
I
CCQ4
--
Coupling mode
PRE : OFF, SW4: ON
SW9: a
-- 1.0 1.8
mA
Open loop voltage gain
G
VO
--
V
o
=
-22dBV
NF resistor (150): Short
65 80 --
Closed loop voltage gain
G
VC
--
V
o
=
-22dBV --
35
--
dB
Maximum output voltage
V
om1
--
THD
=
1%
160
250 --
mV
rms
Total harmonic distortion
THD1
--
V
CC
= 1V, V
o
=
-22dBV --
0.08
0.3
%
Equivalent input noise
voltage
V
ni
--
Rg = 2.2k
BPF: 20Hz~20kHz
NAB (G
V
= 35dB, f = 1kHz)
SW1: b
-- 1.7 2.7
V
rms
Cross talk (CH
-A / CH-B) CT1
--
--
60
--
Cross talk
(forward / reverse)
CT2 --
V
o
=
-22dBV
-- 62 --
Ripple rejection ratio
RR1
--
f
r
= 100Hz, V
r
=
-32dBV
BPF = 100Hz
-- 54 --
Preamplifier muting
attenuation
ATT1 --
V
o
=
-22dBV
SW9: ba
-- 84 --
dB
P
r
eam
p.
st
age
Driver on resistance
R1
--
I
L
= 100A, SW10: OPEN
--
90
--
AMS sensitivity 1
AMS1
--
SW5: b
-58.3 -56.3 -54.3
AMS sensitivity 2
AMS2
--
SW5: a
-69.7 -67.7 -65.7
dBV
Forward mode on voltage
V
44
--
0 --
0.3 V
Reverse mode on current
I
44
--
5 --
--
A
Preamplifier on voltage
V
45
--
0 --
0.3 V
Preamplifier off current
I
45
--
5 --
--
A
Metal mode on voltage
V
46 (M)
--
0.8 -- 0.95
V
Normal mode on voltage
V
46 (N)
--
V
CC
= 0.95V
0 -- 0.3 V
TA2123AF
2002-10-30
16
Characteristic Symbol
Test
Cir
-
cuit
Test Condition
Min.
Typ.
Max.
Unit
Voltage gain 1
G
V1
--
-- 24 --
Channel balance
CB
--
V
o
=
-22dBV
-1.5 0 +1.5
Voltage gain 2
G
V2
--
V
in (A)
= V
in (B)
=
-V
in (C)
V
o
=
-22dBV
28 30 32
dB
Output power
P
o
--
V
CC
= 1.5V
THD (A) = THD (B) = 10%
3 6 --
mW
Total harmonic
distortion
THD --
P
o
= 1mW
--
0.1
0.8
%
Output noise voltage
V
no
--
Rg = 600, SW2: b
BPF = 20Hz~20kHz
-- 40 80
V
rms
Cross talk
CT3
--
V
o
=
-22dBV 34
43
--
Ripple rejection ratio
RR2
--
V
CC
= 1V, f
r
= 100Hz
V
r
=
-32dBV, BPF = 100Hz
-- 70 --
Power amplifier muting
attenuation
ATT2 --
V
o
=
-22dBV
SW5: ab
-- 72 --
dB
P
o
wer am
p.
st
age
Beep signal input
sensitivity
SEN --
V
o
=
-62dBV,
SW5:
OPEN
0.7 1.3 2.2
A
p
-p
Voltage gain 3
G
V3
--
f = 40Hz, V
in
=
-64dBV
SW7: Open
Monitor: C
-AMP. -GND
41 44 47
Voltage gain 4
G
V4
--
f = 40Hz, V
in
=
-47dBV
SW7: Open
Monitor: C
-AMP. -GND
27.5 30.5 33.5
dB
Maximum output
voltage
V
om2
--
f = 40Hz, THD = 1%
SW3: b, SW7: Open
-- 86 --
mV
rms
Muting attenuation
ATT3
--
f = 40Hz, V
o
=
-32dBV
SW7: Openon
-- 53 -- dB
B
oost
am
p
.
s
t
age
Equalizer on resistance
R2
--
I
L
= 100A, SW7: Open
--
1.9
--
k
Ripple filter output voltage
V
RF OUT
-- V
CC
= 1V, I
RF
= 20mA
0.89
0.92
--
V
Ripple filter ripple rejection
ratio
RR3 --
V
CC
= 1V, I
RF
= 20mA
BPF = 100Hz, f
r
= 100Hz
V
r
=
-32dBV
35 42 -- dB
Power amplifier on current
I
41
--
5 --
--
A
Power amplifier off voltage
V
41
--
0 --
0.3 V
Power on curent
I
42
--
5 --
--
A
Power off voltage
V
42
--
0 --
0.3 V
Boost on voltage
V
43 (ON)
-- 0.8
--
0.95
V
Boost off voltage
V
43 (OFF)
--
V
CC
= 0.95V
0 -- 0.3 V
TA2123AF
2002-10-30
17
Test Circuit (preamplifier stage)
RF IN
4.7F
+ -
V
CC
V
CC
TA2123AF
4.7
F
+
-
2SA1362-Y
RF OUT
BASE
RF OUT
10
F
+
-
GND
V
REF OUT
AMS DET
22k
0.
1
F
22k
10k
2.7k
AMS MIX
AMS SW
7.5k
0.22F
Rg
= 600
~
22k
AM
S I
N
150
33
F
+
-
200k
6.8k
0
.
02
2
F
1.
8k
1
F
10k
PRE
OUT
B
PR
E N
F
B
PR
E O
U
T
B
M
T
L DRV
B
2.
2k
0.
033
F
2.
2k
0.
033
F
1.
8k
10k
PRE
OUT
A
1
F
M
T
L DRV
A
PR
E O
U
T
A
PR
E N
F
A
200k
6.8k
0
.
02
2
F
150
33
F
+
-
22k
+
-
22
F
IN
A
-
R
IN
B
-
R
V
REF
OU
T
IN
B
-
F
IN
A
-
F
2.2k 4
1000F 4
SW1
a1 a2
a3
a4
b
4.7F
~
Rg
= 600
+
-
2.
2
F +
-
V
REF IN
PRE GND
M / N SW
PRE SW
SW10
SW9
b
a
b
a
F / R SW
SW8
RF OUT
b
a
SW6
V
CC
PW SW
b
a
SW5
RF OUT
MT SW
AMS OUT
V
CC
18k
36
37
40
41
42
44
45
46
47
48
1 2 3 4 5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
24
25
TA2123AF
2002-10-30
18
Test Circuit (power amplifier stage)
Output circut of output coupling type
2.
2
F
+
-
100k
0.
1
F
4.
7
F
2k
OUT
C
20k
BST OUT
DE
T
AG
C
IN
BST
N
F
BST
O
U
T
PW
IN
C
+
-
SW3A
b
a a
0.
33
F
0.
33
F
Rg = 600
~
0.
33
F
SW3B
b
LP
F
EQ
A
0.
15
F
0.
012
F
PW
N
F
A
PW
IN
A
PW
IN
B
a
~
~
SW2A
Rg = 600
Rg = 600
1
F
1
F
SW2B
a
b b
600
600
0.
012
F
V
REF OUT
PW
N
F
B
EQ
B
SW4
4.7
F
C-AMP SW
MT TC
- +
BEEP
TA2123AF
MT SW
PW SW
BST SW
RF OUT
a
b
SW5
V
CC
a
b
SW6
SW7
PRE GND
V
REF IN
2.2F
+
-
22
F
-
+
V
REF
OU
T
4.7F
+ -
RF IN
PW GND
OUT
B
OUT
B
1.5
OUT
C
0.47F
OUT
C
32
1.5
0.47F
32
1.5
0.47F
OUT
A
OUT
A
V
CC
V
CC
47
F
+
-
BASE
2SA1362-Y
RF OUT
RF OUT
GND
10
F
+
-
13
12
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
41
42
43
47
48
1
3
OUT
B
1.5
OUT
C
220
F
OUT
C
32
1.5
0.47F
32
4.7
+
OUT
A
OUT
A
OUT
B
0.47F
-
22
21
20
TA2123AF
2002-10-30
19
Package Dimensions
Weight: 0.17g (typ.)
TA2123AF
2002-10-30
20
TOSHIBA 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..
The 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.
The products described in this document are subject to the foreign exchange and foreign trade laws.
The 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.
The information contained herein is subject to change without notice.
000707EBA
RESTRICTIONS ON PRODUCT USE
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