View PT2258-SL_4179056.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
6-Channel Electronic Volume Controller IC
PT2258
DESCRIPTION
PT2258 is a 6-Channel Electronic Volume Controller IC utilizing CMOS Technology specially designed for the new generation of AV Multi-Channel Audio System. PT2258 provides an I2C Control Interface, an attenuation range of 0 to -79dB at 1dB/step, low noise, and high channel separation. Housed in 20 pins, DIP or SOP, PT2258's pin assignments and application circuit are optimized for easy PCB Layout and cost saving advantages.
FEATURES
* * * * * * * * * * * CMOS Technology Low Power Consumption Least External Components Attenuation Range: 0 to -79dB at 1dB/step Operating Voltage: 5 to 9 V Low Noise, S/N Ratio>100dB (A-weighting) High Channel Separation I2C Bus Control Interface Selectable Address 6-Channel Outputs Available in 20 pins, DIP or SOP
APPLICATIONS
* * * * * AV Surround Audio Equipment Car Audio Mini Compo Computer Multi-Media Speaker Other Audio Equipments
PT2258 V1.2
-1-
July, 2005
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
6-Channel Electronic Volume Controller IC
PT2258
BLOCK DIAGRAM
IN1
10 dB /S t ep
1d B/ s t e p
+
-
OUT 1
Ref
1d B/s te p
10 dB /S t ep
+
-
OUT 2
IN2 IN3
1d B/ s t e p
10 dB /S t ep
+
-
OUT 3
Ref
1d B/s te p
10 dB /S t ep
+
-
OUT 4
IN4 IN5
10 dB /S t ep
1d B/s te p
+
-
OUT 5
Ref
1d B/ s t e p
10 dB /S t ep
+
-
OUT 6 Vc c
IN6 COD E1 COD E2
C ontr ol unit
Ref
+
-
REF
DGN D
SDA
SCL
GND
PT2258 V1.2
-2-
July, 2005
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
6-Channel Electronic Volume Controller IC
PT2258
PIN CONFIGURATION
IN1 IN2 IN3 CODE 2 DGND SCL SDA IN4 IN5 IN6 1 2 3 4 5 6 7 8 9 10 P T 2 25 8 20 19 18 17 16 15 14 13 12 11 OUT 1 OUT 2 OUT 3 CODE 1 VCC REF GND OUT 4 OUT 5 OUT 6
PT2258 V1.2
-3-
July, 2005
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
6-Channel Electronic Volume Controller IC
PT2258
PIN DESCRIPTION
Pin Name IN1 IN2 IN3 CODE2 DGND SCL SDA IN4 IN5 IN6 OUT6 OUT5 OUT4 GND REF VCC CODE1 OUT3 OUT2 OUT1 I/O I I I I I I I I O O O O O O Description Channel Input No. 1. Connect a Capacitor to Audio Source Channel Input No. 2 Connect a Capacitor to Audio Source Channel Input No. 3 Connect a Capacitor to Audio Source Refer to Address Code Section Digital Ground I2C Clock Input I2C Data Input Channel Input No. 4 Connect a Capacitor to Audio Source Channel Input No. 5 Connect a Capacitor to Audio Source Channel Input No. 6 Connect a Capacitor to Audio Source Channel Output No. 6 Connect a Capacitor to the Next Stage Channel Output No. 5 Connect a Capacitor to the Next Stage Channel Output No. 4 Connect a Capacitor to the Next Stage Ground 14 Reference Voltage= 1/2 Vcc Connect a Capacitor to the Ground Power Supply Input 16 Refer to the Address Code Section Channel Output No. 3 Connect a Capacitor to the Next Stage Channel Output No. 2 Connect a Capacitor to the Next Stage Channel Output No. 1 Connect a Capacitor to the Next Stage Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
PT2258 V1.2
-4-
July, 2005
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
6-Channel Electronic Volume Controller IC
PT2258
FUNCTION DESCRIPTION
BUS INTERFACE
Data are transmitted to and from the microprocessor to the PT2258 via the SDA and SCL. The SDA and SCL make up the BUS Interface. It should be noted that the pull-up resistors must be connected to the positive supply voltage.
DATA VALIDITY
A data on the SDA Line is considered valid and stable only when the SCL Signal is in HIGH State. The HIGH and LOW States of the SDA Line can only change when the SCL signal is LOW. Please refer to the figure below.
D ATA
CLK D a t a Lin e S ta b le , D a t a Va lid D a ta C h a ng e A llo w e d
START AND STOP CONDITIONS
A Start Condition is activated when 1. the SCL is set to HIGH and 2. SDA shifts from HIGH to LOW State. The Stop Condition is activated when 1. SCL is set to HIGH and 2. SDA shifts from LOW to HIGH State. Please refer to the timing diagram below.
CLK
DATA
Start
Stop
BYTE FORMAT
Every byte transmitted to the SDA Line consists of 8 bits. Each byte must be followed by an Acknowledge Bit. The MSB is transmitted first.
PT2258 V1.2 -5July, 2005
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
6-Channel Electronic Volume Controller IC
PT2258
ACKNOWLEDGE
During the Acknowledge Clock Pulse, the master (P) puts a resistive HIGH level on the SDA Line. The peripheral (audio processor) that acknowledges has to pull-down (LOW) the SDA line during the Acknowledge Clock Pulse so that the SDA Line is in a Stable Low State during this Clock Pulse. Please refer to the diagram below. The audio processor that has been addressed has to generate an Acknowledge after receiving each byte, otherwise, the SDA Line will remain at the High Level during the ninth (9th) Clock Pulse. In this case, the master transmitter can generate the STOP Information in order to abort the transfer.
CLK 1 2 3 4 7 8 9
DATA Start
MSB A cknowledgment from R eceiver
TRANSMISSION WITHOUT ACKNOWLEDGE
If you want to avoid the acknowledge detection of the audio processor, a simpler P transmission may be used. Wait one clock and do not check the slave acknowledge of this same clock then send the new data. If you use this approach, there are greater chances of faulty operation as well as decrease in noise immunity.
INTERFACE PROTOCOL
The interface protocol consists of the following: * * * * * A Start bit A Chip Address Byte ACK=Acknowledge bit A Data byte A Stop bit
Please refer to the diagram below:
P T2258 A DD RE SS MS B S TA RT 1 0 FIRS T B YTE LS B MS B 0 0 1 0 0 0 A CK DATA LS B MS B A CK DATA LS B A CK S TOP
DATA TRA NS MITTE D (N-BY TES + A CK NOW LE DGE )
Notes: 1. ACK=Acknowledge 2. Max. Clock Speed=100K Bits/s
PT2258 V1.2 -6July, 2005
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
6-Channel Electronic Volume Controller IC PT2258 ADDRESS CODE
PT2258
PT2258 Address Code depends on the state of CODE1 (Pin No.17) and CODE2 (Pin No.4). If CODE1 or CODE2 is connected to Vcc, then CODE1 or CODE2 is set to "1". If CODE1 or CODE2 is connected to the Ground, it is set to "0". Please refer to the information below: Condition 1: CODE1 1 CODE2 1 0 1 1 0 0 LSB
Then, PT2258 Address Code is 8 CH: 1 0 0 MSB Condition 2: CODE1 1 CODE2 0
Then, PT2258 Address Code is 88 H: 0 0 1 MSB Condition 3: CODE1 0 1 MSB Condition 4: CODE1 0 1 MSB CODE2 1 0 0
0
1
0
0
0 LSB
Then, PT2258 Address Code is 84 H: 0 0 1 0 0 LSB
CODE2 0 0 0 0 0 0 0 0 LSB
Then, PT2258 Address Code is 80H:
PT2258 V1.2
-7-
July, 2005
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
6-Channel Electronic Volume Controller IC
PT2258
I2C BUS INTERFACE START TIME
After Power is turned ON, PT2258 needs to wait for a short time in order to insure stability. The waiting time period for PT2258 to send I2C Bus Signal is at least 200ms. If the waiting time period is less than 200ms, I2C Control may fail. Please refer to the diagram below.
V
POWER ON 90% VDD
VDD At least 200ms
SDA/SCL
PT2258 V1.2
-8-
July, 2005
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
6-Channel Electronic Volume Controller IC
PT2258
PT2258 CONTROL SOFTWARE PROCEDURE
1. In order to ensure exact operation under any operating voltage, it is recommended an instruction to clear the register "C0H" must be transmitted first. Please refer to the following diagram: Start 1 0 0 0 1 0 0 0 Ack 1 1 0 0 0 0 0 0 Ack Stop 2258 Address Clear Register 2. The PT2258 function register does not have any default settings. After clearing the register, an initial value must send in order to each register. If a register does has not been set, it is possible that no sound will be output. 3. When adjusting the volume of PT2258, it is necessary to send a multiple of 10dB followed by a 1dB code to the attenuator in sequence. If this sequence is not followed, or if only a 10dB or 1dB value is sent, the IC may not operate normally. Please refer to the diagram below: Volume setting -42dB Start 1 0 0 0 1 0 0 0 Ack 1 1 0 1 0 1 0 0 ACK 1 1 1 0 0 0 1 0 Ack Stop PT2258 Address -40dB -2dB Start 1 0 0 0 1 0 0 0 Ack 1 1 1 0 0 0 1 0 Ack 1 1 0 1 0 1 0 0 ACK Stop PT2258 Address -2dB -40dB The two methods above are both acceptable.
Warning!! The following transmission method is not permitted.
Send only a 10dB attenuation value: Start 1 0 0 0 1 0 0 0 Ack 1 1 0 1 0 1 0 0 ACK Stop PT2258 Address -40dB Send only a 10dB attenuation value: Start 1 0 0 0 1 0 0 0 Ack 1 1 1 0 0 0 1 0 ACK Stop PT2258 Address -2dB Do not send a 10dB code without simultaneously with a 1dB code or in combination with other instruction codes. Start 1 0 0 0 1 0 0 0 Ack 1 1 1 0 0 0 1 0 Ack 1 1 1 1 1 0 0 1 ACK 1 1 0 1 0 1 0 0 ACK Stop PT2258 Address -2dB All CH mute -40dB
PT2258 V1.2
-9-
July, 2005
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
6-Channel Electronic Volume Controller IC
PT2258
DATA BYTES DESCRIPTION
FUNCTION BITS
MSB 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 0 0 0 1 1 0 0 1 1 0 0 1 1 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 A3 0 A3 0 A3 0 A3 0 A3 0 A3 0 A3 0 1 A2 B2 A2 B2 A2 B2 A2 B2 A2 B2 A2 B2 A2 B2 0 A1 B1 A1 B1 A1 B1 A1 B1 A1 B1 A1 B1 A1 B1 0 LSB A0 B0 A0 B0 A0 B0 A0 B0 A0 B0 A0 B0 A0 B0 M FUNCTION 6-Channel, -1dB/step 6-Channel, -10dB/step Channel No. 3, -1dB/step Channel No. 3, -10dB/step Channel No. 4, -1dB/step Channel No. 4, -10dB/step Channel No. 2, -1dB/step Channel No. 2, -10dB/step Channel No. 5, -1dB/step Channel No. 5, -10dB/step Channel No. 1, -1dB/step Channel No. 1, -10dB/step Channel No. 6, -1dB/step Channel No. 6, -10dB/step 6-Channel, Mute When M= 1, Mute On When M=0, Mute Off
ATTENUATION UNIT BIT
A3/--A2/B2 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 1 1 0 1 0 Note: Ax=-1dB/step, Bx=-10dB/step A1/B1 0 0 1 1 0 0 1 1 0 0 A0/B0 0 1 0 1 0 1 0 1 0 1 Attenuation Value(dB) 0/0 -1/-10 -2/-20 -3/-30 -4/-40 -5/-50 -6/-60 -7/-70 -8/-9/-
PT2258 V1.2
- 10 -
July, 2005
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
6-Channel Electronic Volume Controller IC
PT2258
ABSOLUTE MAXIMUM RATINGS
Parameter Supply Voltage Operation Temperature Storage Temperature Symbol Vs Topr Tstg Ratings 12 -40+85 -65+150 Unit V
ELECTRICAL CHARACTERISTICS
(VDD=9V, VI=1Vrms, f=1KHz, Temp=27 ) Parameter Symbol Conditions Supply Voltage VDD Supply Current Is Input Impedance RIN FL, FR, CTR, SUB, SL, SR Max. Input Voltage VCL Volume=0dB, THD=1% Channel Separation Sc Volume Control Range Crange Max. Attenuation Avmax Attenuation Step Astep Volume=0-50dB Attenuation Error EA Mute Attenuation Total Harmonic Distortion Output Noise Signal-Noise Ratio Output Impedance Output Gain Max. Output Voltage I2C Section Bus Low Input Level Bus High Input Level Bus Initialization AMUTE THD Noise S/N Ro Go Vomax VIL VIH TINIT FL, FR, CENTER, SUB, SL, SR THD=1% A-weighting Volume=0dB, input 200mVrms A-weighting 0dB=1Vrms, A-weighting Min. 5 7 22 90 -1.0 90 0.003 100 -0.5 2.3 0 2.8 Typ. 9 10 33 2.8 100 79 -79 1 0 95 0.005 3 105 600 0 2.5 2.4 3.0 250 Max. 10 12 42 3.0 110 +1.0 98 0.01 5 110 900 +0.5 2.8 2.5 VDD 300 dB Vrms V V mS Unit V mA K Vrms dB dB dB dB dB dB % V dB
Cref=10F
PT2258 V1.2
- 11 -
July, 2005
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
6-Channel Electronic Volume Controller IC
PT2258
APPLICATION CIRCUIT
INPUT
100K 100K 100K 10 F 10 F
+ + +
1 2 3 4 5
IN1 IN2 IN3 CODE2 DGND SCL SDA IN4 IN5
OUT1 20 OUT 2 19 OUT 3 18 CODE1 17 VCC 16 REF 15 GND 14 OUT 4 13 OUT 5 12 OUT6 11
+ +
10 F 100K 100K
VC C
OUT PUT
+
10 F 10 F
10 F
100K
+
0.1 F 10 F
I 2C Bus
MCU
10 F
6 7 8 9
+ + + +
10 F
Cref 10 F
+ + +
100K 100K 100K
10 F 10 F
10 F 10 F
100K 100K 100K
10 IN6
PT 2258 Address=88Hex
D G N D AG N D
PT2258 V1.2
- 12 -
July, 2005
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
6-Channel Electronic Volume Controller IC
PT2258
ORDER INFORMATION
Valid Part Number PT2258 PT2258-S PT2258 (L) PT2258-S (L) Package Type 20 Pins, DIP, 300mil 20 Pins, SOP, 300mil 20 Pins, DIP, 300mil 20 Pins, SOP, 300mil Top Code PT2258 PT2258-S PT2258 PT2258-S
Notes: 1. (L), (C) or (S) = Lead Free 2. The Lead Free mark is put in front of the date code.
PT2258 V1.2
- 13 -
July, 2005
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
6-Channel Electronic Volume Controller IC
PT2258
PACKAGE INFORMATION
20 PINS, DIP, 300MIL
PT2258 V1.2
- 14 -
July, 2005
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
6-Channel Electronic Volume Controller IC
Symbol A A1 A2 b b1 b2 b3 c c1 D D1 E E1 e eA eB eC L Min. 0.015 0.115 0.014 0.014 0.045 0.030 0.008 0.008 0.980 0.005 0.300 0.240 0.000 0.115 Nom. 0.130 0.018 0.018 0.060 0.039 0.010 0.010 1.030 0.310 0.250 0.100 bsc. 0.300 bsc. 0.130 Max. 0.210 0.195 0.022 0.020 0.070 0.045 0.014 0.011 1.060 0.325 0.280 0.430 0.060 0.150
PT2258
Notes: 1. All dimensions are in INCHES. 2. Dimensioning and tolerancing per ANSI Y14.5M-1982. 3. Dimension "A", "A1" and "L" are measured with the package seated in JEDEC Seating Plane Gauge GS-3 4. "D", "D1" and "E1" dimensions do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.010 inch. 5. "E" and "eA" measured with the leads constrained to be perpendicular to datum -c- . 6. "eB" and "eC" are measured at the lead tips with the leads unconstrained. 7. N is the number of the terminal positions (N=20) 8. Pointed or rounded lead tips are preferred to ease insertion. 9. "b2" and "b3" maximum dimensions are not include dambar protrusions. Dambar protrusions shall not exceed 0.010 inch (0.25mm) 10. Distance between leads including dambar protrusions to be 0.005 inch minimum. 11. Datum plane -H- coincident with the bottom of lead, where lead exits body. 12. Refer to JEDEC MS-001, Variation AD. JEDEC is the trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION.
PT2258 V1.2
- 15 -
July, 2005
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
6-Channel Electronic Volume Controller IC
PT2258
20 PINS, SOP, 300MIL
Symbol A A1 B C D E e H h L
Min. 2.35 0.10 0.33 0.23 12.60 7.40 10.00 0.25 0.40 0
Nom. 1.27 bsc. -
Max. 2.65 0.30 0.51 0.32 13.00 7.60 10.65 0.75 1.27 8
PT2258 V1.2
- 16 -
July, 2005
Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw
6-Channel Electronic Volume Controller IC
PT2258
Notes: 1. Dimensioning and tolerancing per ANSI Y14.5M-1982. 2. Dimension "D" does not include mold flash, protrusions or gate burrs. Mold Flash, protrusion or gate burrs shall not exceed 0.15 mm (0.006 in) per side. 3. Dimension "E" does not include interlead flash or protrusions. Interlead flash or protrusions shall not exceed 0.25 mm (0.010 in) per side. 4. The chamfer on the body is optional. It is not present, a visual index feature must be located within the crosshatched area. 5. "L" is the length of the terminal for soldering to a substrate. 6. N is the number of the terminal positions (N=20) 7. The lead width "B" as measured 0.36 mm (0.014 in) or greater above the seating plane, shall not exceed a maximum value of 0.61 mm (0.24 in). 8. Controlling dimension: MILLIMETER. 9. Refer to JEDEC MS-013, Variation AC. JEDEC is the trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION.
PT2258 V1.2
- 17 -
July, 2005

▲Up To Search▲

Price & Availability of PT2258-SL

	To Download PT2258-SL Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .