APR9301- V2
.
APLUS INTEGRATED CIRCUITS INC
.
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Feat
1
age
P
nd Message
Seco
to 30
for Single 20
Device
Playback
ice Recording &
o
V
le-Chip
Sing
Pag
ge 2
Functional Block Diagram
Figure 2 shows the functional block diagram for the APR9301-V2
Figure 2 APR9301
-V2 Functional Block Diagram
Sample Application
Figure 3 shows the diagram for a single, 20-second message
recording and playback application using theAPR9301
device. When pins are connected as shown in this example,
the operating modes are as follows:
Record Mode (Level-Activated)
A single voice message of up to 20 seconds can be recorded.
The /LED pin will go low during the actual recording process
to provide a visual indication if an LED light is connected to
this pin. The chip is in record mode as long as the /RecL pin
stays low (level-activated). If the message lasts longer than
20 seconds, recording will terminate automatically after the
last available memory cell is written. If the message is shorter
than 20 seconds, the recording operation will stop when the
the /RecL pin goes high. The speaker driver is automatically
tristated during the recording operation.
Messages of up to 30 seconds can be recorded by using
different OscR resistor values (see Table 1).
Playback Mode (Edge-Activated)
Playback always starts from the beginning of the message.
The chip is in playback mode after the /PlayE pin pulses low
(edge-activated). Playback will stop immediately when the
/PlayE pin pulses low a second time. If the newly recorded
message is shorter than the previously recorded message,
the remaining portion of the previous message will not be
played after the new message is played back. The input pre-
amplifier, AGC, and main amplifier circuits are disabled
during playback.
Standby Mode (/CE = "0")
The chip will automatically return to the standby state after
recording or playback operation is completed.
Power Down Mode (/CE = "1")
The chip is always in standby state. No recording or playback
is allowed. Current consumption is typically less than 1
u
A.
AnaIn
Power Supplies
Amp
AGC
MicRef
MicIn
OscR
SP+
/LED
Amp
V
SSD
V
SSA
SP-
A u to m atic G ain
Pre-
Amp
V
CCD
V
CCA
/RecL /PlayE
C ontrol (A G C )
S am p le & H o ld
S w itch ed
C apacitor F ilter
A n alo g W rite &
R ead C ircuits
N o n -Vo latile
A nalog S torage
M em ory A rray
Device Control
S w itch ed
C apacitor F ilter
C ircuit
AnaOut
In tern al
O scillator
APLUS APR9301-V2
g
Page 3
Figure 3 Sample Application for the APR9301-V2
Table 1
Typical Dependence of Sampling Frequency and Total Voice Duration on OscR Resistor Value
(V
CCA
= V
CCD
= 6V; V
SSA
= V
SSD
= 0V; T
A
= 25
o
C)
Pin 7 - OscR
Typical Sampling Frequency
Cutoff Frequency (3 dB Point)
Typical Total Voice Duration
38 k
W
8 kHz
3.4 kHz
16 seconds
52 k
W
6.4 kHz
2.7 kHz
20 seconds
67 k
W
5.3 kHz
2.3 kHz
24 seconds
89 k
W
4.0 kHz
1.7 kHz
32 seconds
N C
N C
N C
N C
N C
/C E
O scR
N C
N C
N C
NU1
V
S S
SP+
SP-
V
C C D
V
S S D
/LED
N C
/P la yE
N C
A na O ut
A na In
A G C
M icR e f
M icIn
VccA_R
V c c A _ L
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
1 9
1 8
1 7
1 6
1 5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
/R e cL
5 2K
8 Ohm Speaker
1K
0 .1 F
47u
0.1uF
4.7 F
22 0K
4 .7K
2 2F
4 .7 K
0 .1 F
E lectre t
M icro ph on e
Notes:
NC = No Connect (must be floating).
Pins 23 and 27 have internal pull-up resistors.
The typical sampling frequency is 6.4 kHz with OscR = 52 k
W.
Substrate should be connected to GND.
1 50 K
V C C
0 .1 F
1K
VC C(6VDC)
V C C
V C C
For low power applications
use double pole switch.
APLUS APR9301-V2
Page 4
Figure 4 shows the same application using external
microphone biasing instead of the microphone amplifier on
the APR9301
-V2 , thus bypassing the preamplifier portion
of the chip function.
Figure 4 Sample Application Using External Microphone Biasing
Electrical Characteristics
Tables 2 through 4 list Absolute Maximum Ratings,
Recommended DC Characteristics, and recommended
Analog Characteristics for the
APR9301
-V2 device.
Absolute Maximum Ratings
Stresses greater than those listed in Table 2 may cause
permanent damage to the device
.
These specifications
represent a stress rating only. Operation of the device at
these or any other conditions above those specified in the
recommended DC Characteristics or recommended Analog
Characteristics of this specification is not implied. Operation
of the device at maximum conditions for extended periods
may affect reliability.
N C
N C
N C
N C
N C
/C E
O scR
N C
N C
N C
NU1
V
S S
SP+
SP-
V
C C D
V
S S D
/LED
N C
/P la yE
N C
N C
A na In
N C
N C
N C
VccA_R
VccA_L
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
1 9
1 8
1 7
1 6
1 5
1
2
3
4
5
6
7
8
9
1 0
11
1 2
1 3
1 4
A
P
R9301-V2
/R e cL
52 K
8 O h m S p e a k e r
2K
0 .1 F
4 7 F
0 .1 F
2 2 F
Electret
M icrop ho ne
Notes:
NC = No Connect (must be floating).
Pins 23 and 27 have internal pull-up resistors.
The typical sampling frequency is 6.4 kHz with OscR = 52 k
W.
NPN bipolar transistor, T1 model #MPS3904 or equivalent.
R1 and R2 are recommended to be 30 k
W
and 10 k
W
, respectively, for typical applications.
1 K
R 2
T 1
10 K
1 00 K
V C C ( 6 V D C )
V C C
V C C
V C C
APLUS APR9301-V2
0.1uF
Substrate should be connected to GND.
Page 5
Table 2
Absolute Maximum Ratings.
Table 3
DC Characteristics
Note 1
Table 4
Analog Characteristics
Note 1
Item
Symbol
Condition
Min
Max
Unit
Power Supply Voltage V
CC
T
A
= 25
o
C 4.5 6.5 V
Input Voltage
V
IN1
T
A
= 25
o
C
-0.3
V
CC
+0.3
V
Input Voltage
V
IN2
|I
IN
| < 20 mA
-1.0
V
CC
+1.0
V
Storage Temperature
T
STG
-
-65
150
o
C
Temperature Under Bias
T
BS
-
-65
125
o
C
Lead Temperature
T
LD
<10s
-
300
o
C
Item
Symbol
Condition
Min
Typ
Max
Unit
Input High Voltage
V
IH
-
0.8
x
-
V
CC
V
Input Low Voltage
V
IL
-
-
-
0.8
V
Output High Voltage
V
OH
I
OH
= -1.6mA
2.4
-
-
V
Output Low Voltage
V
OL
I
OL
= 4.0mA
-
-
0.45
V
Input Leakage Current
I
IH
V
IH
= V
CC
-
-
1.0
uA
Input Leakage Current
I
IL
V
IL
= V
SS
Note 2
-1.0
-
-
uA
Output Tristate Leakage Current
I
OZ
V
OUT
= V
CC
or
V
OUT
= V
SS
-1.0
-
1.0
uA
Operating Current Consumption
I
CC
Internal Clock, No Load
-
25
-
mA
Standby Current Consumption
I
CCS
No Load
-
1.0
-
uA
Item
Symbol
Condition
Min
Typ
Max
Unit
MicIn Input Voltage
V
MI
-
-
-
20
mV
P-P
MicIn Input Resistance
R
MI
-
-
10
-
k
W
MicIn Amp Gain (1)
G
MI1
AGC < 2.2V
-
24
-
dB
MicIn Amp Gain (2)
G
MI2
AGC > 3.0V
-
-45
-15
dB
AnaIn Input Voltage
V
ANI
-
-
-
50
mV
P-P
AnaIn Input Resistance
R
ANI
-
-
10
-
k
W
AnaIn Amp Gain
G
ANI
AnaIn to SP+/-
-
22
-
dB
AGC Output Resistance
R
AGC
-
-
1
-
k
W
SP+/- Output Power
P
SP
R
SP+/-
= 16
W
-
12.2
-
mW
Voltage Amplitude Across SP+/-
V
SP
R
SP+/-
> 16
W
-
1.25
-
V
P-P
Total Harmonic Distrotion
THD
@ 1kHz & 20mVp-p input
1
%
Note 1: Typical Values: V
CCD
= V
CCA
= 6V; V
SSD
= V
SSA
= 0V; T
A
= 25
o
C
Note 2: Except pins 23 and 27 which have internal pull-up resistors.
APLUS APR9301-V2
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