APLUS INTEGRATED CIRCUITS INC. APR9301- V2

Transcription

1 INTEGRATED CIRCUITS I. Feature s S i ngle-chip, hi gh quality v o i c e recording & playback solution - No external ICs r equired - Minimum external c omponents Non - volatile Flash memory t e ch no l o g y - No battery ba ckup r equired - 100K record c ycles (t yp i c a l ) year message r e tention ( t yp ic al ) S i ngle m e ss age of 2 0 to 30 se conds, w i th e x t e rnal resistor sele c t i o n APR9301- V2 Single-Chip V o ice Recording & Playback Device for Single 20 to 30 Second Message User -friendly, easy-to-use operation - P r o g r amming & development systems not required - Level-activated r e c o r d i ng & ed ge-activated playback switches Low power co nsumption - O perating current: 25 ma (typical, no load) - Standby current: 1uA (typical, no load) A u t om atic p o w e r-down feature for l onger b a ttery life C hip e nable pin for simple m e s s age expansion S i ngle 65 V power s upply General Description The APR9301 de vi ce o f fe rs t r ue s i n g le -chip s o l i d-state st orage ca pa bility a nd requires no so ftware o r m i c r ocontroller support. It p r ov ides h i gh -quality recording and playback w i th a single 20- t o 30-second m e s s a ge. I t is ideal for portable vo i c e recorders, toys, an d many o t he r c onsumer an d industrial applications. APLUS integrated an alog /m ulti-level storage technology i s im p l emented i n advanced F l ash no n-volatile me mo ry ce lls, ea ch o f w h ich ca n typically st ore m o re than 256 vo ltage le v e ls. The APR9301 -V2 stores and reproduces v o ic e signals in t h e i r natural forms, eliminating the distortion t h a t is often introduced by en coding an d c o m p ression. The device co m b in es a sm all s i ze w i t h lo w po w e r c onsumption, non- volatility, and ease -of-use for a cost effective solution to voice recording a nd p l a y back.. Page 1

2 Functional Block Diagram Figure 2 shows the functional block diagram for the Figure 2 APR9301 -V2 Functional Block Diagram V CCD V CCA V SSD V SSA Internal Oscillator Power Supplies Amp Switched Capacitor Filter Sample & Hold Circuit AnaOut MicIn MicRef AGC Pre- Amp Autom atic Gain Control (AGC) Analog W rite & Read Circuits Non-Volatile Analog Storage Memory Array Switched Capacitor Filter Device Control Amp /RecL /PlayE 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 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 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 preamplifier, 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 ua. Page 2

3 Figure 3 Sample Application for the (6VDC) V CCD /RecL For low power applications use double pole switch. /CE V SSD /PlayE 1K 150K K AnaOut AGC NU1 V SS MicRef MicIn VccA_R VccA_L 220K 4.7µF 0.1uF 47u 1K 22µF 4.7K 8 Ohm Speaker Electret Microphone 4.7K Notes: = No Connect (must be floating). Pins 23 and 27 have internal pull-up resistors. The typical sampling frequency is 6.4 khz with = 52 kw. Substrate should be connected to GND. Table 1 Typical Dependence of Sampling Frequency and Total Voice Duration on Resistor Value (V CCA = V CCD = 6V; V SSA = V SSD = 0V; T A = 25 o C) Pin 7 - Typical Sampling Frequency Cutoff Frequency (3 db Point) Typical Total Voice Duration 38 kw 8 khz 3.4 khz 16 seconds 52 kw 6.4 khz 2.7 khz 20 seconds 67 kw 5.3 khz 2.3 khz 24 seconds 89 kw 4.0 khz 1.7 khz 32 seconds Page 3

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 (6VDC) 1 28 V CCD 2 27 /RecL 52K /CE V SSD /PlayE 2K 10K 1K NU V SS VccA_R VccA_L 100K R2 22µF 0.1 µf 47µF T1 0.1uF Electret Microphone 8 Ohm Speaker Notes: = No Connect (must be floating). Pins 23 and 27 have internal pull-up resistors. The typical sampling frequency is 6.4 khz with = 52 kw. NPN bipolar transistor, T1 model #MPS3904 or equivalent. R1 and R2 are recommended to be 30 kw and 10 kw, respectively, for typical applications. Substrate should be connected to GND. 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. Page 4

5 Table 2 Absolute Maximum Ratings. Item Symbol Condition Min Max Unit Power Supply Voltage V CC T A = 25 o C 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 o C Temperature Under Bias T BS o C Lead Temperature T LD <10s o C Table 3 DC Characteristics Note 1 Item Symbol Condition Min Typ Max Unit Input High Voltage V IH V CC x - V Input Low Voltage V IL V Output High Voltage V OH I OH = -1.6mA V Output Low Voltage V OL I OL = 4.0mA V Input Leakage Current I IH V IH = V CC ua Input Leakage Current I IL VIL = V Note 2 SS ua Output Tristate Leakage Current I OZ VOUT = V CC or V OUT = V SS ua Operating Current Consumption I CC Internal Clock, No Load ma Standby Current Consumption I CCS No Load ua Table 4 Analog Characteristics Note 1 Item Symbol Condition Min Typ Max Unit MicIn Input Voltage V MI mv P-P MicIn Input Resistance R MI kw MicIn Amp Gain (1) G MI1 AGC < 2.2V db MicIn Amp Gain (2) G MI2 AGC > 3.0V db Input Voltage V ANI mv P-P Input Resistance R ANI kw Amp Gain G ANI to / db AGC Output Resistance R AGC kw /- Output Power P SP R /- = 16W mw Voltage Amplitude Across /- V SP R /- > 16W V P-P Total Harmonic Distrotion 1kHz & 20mVp-p input 1 % Note 1: Typical Values: V CCD = V CCA = 6V; V SSD = V SSA = 0V; T A = 25o C Note 2: Except pins 23 and 27 which have internal pull-up resistors. Page 5

6 Bonding Pad Diagram & Description of Bonding Pad Coordinates Figure 5 Die Bonding Pad Diagram /CE V CCA D D /RecL NU2 /PlayE Notes: Die diagram is with respect to die center (µm). Die Dimensions: x = mils y = mils AnaOut Die Thickness: mils ( µm NU1 V SSD V SSA V SSA A AGC MicRef MicIn Pad Opening: 110 µm 4.3 mils Connect substrate to ground. Table 5 Bonding Pad Coordinates Pin Pin Name X Axis (Note) Y Axis (Note) /CE Chip Enable Oscillator Frequency-Setting Resistor NU1 Connect to Ground V SSD Digital Ground Supply V SSA Analog Ground Supply V SSA Analog Ground Supply Non-Inverting Speaker Output Inverting Speaker Output V CCA Analog Power Supply V CCA Analog Power Supply MicIn Microphone Input MicRef Microphone Reference Input AGC Automatic Gain Control Analog Signal Input AnaOut Analog Signal Output /PlayE Edge-Activated Playback LED Output NU2 Connect to Ground /RecL Level-Activated Record V CCD Digital Power Supply V CCD Digital Power Supply Note: With respect to die center (µm) Page 6

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