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[AK4145]
= Preliminary =
AK4145
Digital BTSC Stereo Encoder
GENERAL DESCRIPTION The AK4145 is a BTSC Encoder with D/A Converter, which is optimized for Digital AV application. The AK4145 achieves high audio performance using the digital BTSC encoding architecture requires no alignment of external parts. The AK4145 supports major audio data formats (MSB justified, I2S, TDM) to interface with usual DSP. Therefore, the AK4145 is suitable for the systems such as Digital STB/TV, digital recorder. FEATURES Alignment Free Digital BTSC Stereo Encoding Base band Composite Audio Output (Mono/Stereo) Digital Volume for Composite Audio Output Digital De-emphasis filter (32k/44.1k/48kHz) Stereo Digital Volume Control for Audio Input Data Soft Mute Sampling Rate (fs): 32k/44.1k/48kHz Master Clock: 256fs/384fs/512fs/768fs I/F format: 24-Bit MSB justified, 24/20/16-Bit LSB justified or I2S Control: Standalone/I2C-bus Selectable Video Input for Pilot Synchronization S/(N+D): 0.01% S/N: 82dB Channel Separation: 47dB Power Supply: 1.7V ~ 1.9V, 2.7 ~ 3.6V Ta: -20 ~ 85C
P/S PDN MCLK FILT TVDD DVDD
FS1/SDA DIF/SCL
P Interface
PLL
VSS VCOM
AVDD
LRCK BICK SDTI
Audio Data Interface
De-emphasis, DVOL, Stereo Matrix
Digital BTSC Encoder
DATT
DAC
CA
Sync separator
CV/27M
Rev. 0.3-PB -1-
2007/12
[AK4145]
Ordering Guide
AK4145ET AKD4145 -20 +85C Evaluation Board 16pinTSSOP
Pin Layout
FILT PSN CV27M PDN MCLK LRCK BICK SDTI 1 2 3 4 5 6 7 8 16 15 14 CA AVDD VCOM VSS DVDD TVDD DIF/SCL FS/SDA
Top View
13 12 11 10 9
Rev. 0.3-PB -2-
2007/12
[AK4145]
PIN/FUNCTION
Function Filter Pin, 4.7nF should be connected between FILT pin and VSS pin. Parallel/Serial Select Pin (Internal pull-up pin) "L": Serial control mode, "H": Parallel control mode 3 CV27M I Composite Video or 27MHz Signal Input Pin. 4 PDN I Power-Down Mode Pin When at "L", the AK4145 is in the power-down mode and is held in reset. The AK4145 must be reset once upon power-up. 5 MCLK I Master Clock Input Pin 6 LRCK I Channel Clock Input Pin 7 BICK I Audio Serial Data Clock Input Pin 8 SDTI I Audio Serial Data Input Pin 9 FS I Sampling Rate Control Pin in parallel control mode SDA I/O Control Data Pin in serial control mode 10 DIF I Audio Data Interface Format Pin in parallel control mode SCL I Control Data Clock Pin in serial control mode 11 TVDD Digital I/O Power Supply Pin, DVDD(min:1.7V) 3.6V 12 DVDD Digital Power Supply Pin, 1.7 1.9V 13 VSS Ground Pin 14 VCOM O Common Voltage Pin, AVDD/2 Normally connected to VSS with a 0.1F ceramic capacitor in parallel with a 10F electrolytic cap. 15 AVDD Analog Power Supply Pin, 2.7 3.6V 16 CA O Baseband Composite Audio Output Pin Note: All input pins except pull-up pin should not be left floating. I No. 1 2 Pin Name FILT PSN I/O
Handling of Unused Pin
The unused I/O pins should be processed appropriately as below. Classification Analog Digital Pin Name CV FS(Parallel mode), DIF(Parallel mode) Setting Connect to VSS. Connect to VDD or VSS.
Output Status at PDN pin = "L"
Below is the output status of each output pin when the PDN pin = "L". Pin# 1 9 14 16 Pin Name FILT SDA VCOM CA Status VSS Hi-Z VSS VCOM(=VSS)
Rev. 0.3-PB -3-
2007/12
[AK4145]
ABSOLUTE MAXIMUM RATINGS
(VSS=0V; Note 1) Parameter Power Supply Symbol AVDD DVDD TVDD IIN VIND Ta Tstg min -0.3 -0.3 -0.3 -0.3 -20 -65 max 4.3 2.4 4.3 10 TVDD+0.3 85 150 Units V V V mA V C C
Input Current, Any Pin Except Supply Input Voltage (All input pins) Ambient Temperature (powered applied) Storage Temperature
Note 1. All voltages with respect to ground. Note 2. PSN, CV27M, PDN, MCLK, LRCK, BICK, SDTI, FS/SDA, DIF/SCL pin WARNING: Operation at or beyond these limits may result in permanent damage to the device. Normal operation is not guaranteed at these extremes.
RECOMMENDED OPERATING CONDITIONS
(VSS=0V; Note 1) Parameter Power Supply Symbol AVDD DVDD TVDD min 2.7 1.7 DVDD typ 3.3 1.8 3.3 max 3.6 1.9 3.6 Units V V V
WARNING: AKEMD assumes no responsibility for the usage beyond the conditions in this datasheet.
Rev. 0.3-PB -4-
2007/12
[AK4145]
ANALOG CHARACTERISTICS (Ta=25C; AVDD=TVDD=3.3V; DVDD=1.8V; fs=48kHz; BICK=64fs; Signal Frequency=1kHz; 16bit Data; Measurement frequency=50Hz 13kHz; unless otherwise specified) Parameter min typ max Units Resolution 16 Bits Composite Audio Output Characteristics Output Voltage 2.2 Vp-p Load Resistance (Note 4) 5 k Load Capacitance 25 pF BTSC Encoder Characteristics (Note 5) S/(N+D) Mono (1kHz, 100%EIM) 0.01 TBD % Stereo (1kHz, 100%EIM. L or R) 0.01 TBD % S/N Mono (input off) 75 82 dB (A-weighted) Stereo (input off) 75 82 dB Stereo Separation 1kHz 47 dB 20Hz~500Hz 30 dB 500Hz~5kHz 27 dB 5kHz~13kHz 23 dB Frequency response Mono (20~13kHz) -1 1 dB Stereo (20~13kHz) -1 1 dB Video Sync Input Characteristics Video Input Sync Level 100 mVp-p Video Input Impedance 1 M Power Supplies Power Supply Current Normal Operation (PDN pin = "H"): mA AVDD 13 TBD mA DVDD 8 TBD mA TVDD 0.1 TBD Power down mode (PDN pin = "L"): (Note 3) A AVDD 10 100 DVDD 10 100 A TVDD 10 100 A Note 3. All digital input pins are held to VSS. Note 4. AC-load. Note 5. Received by the Belar TVM230 (BTSC Decoder) and measured by the Audio Precision (System Two). Refer to the evaluation board manual.
Rev. 0.3-PB -5-
2007/12
[AK4145]
DC CHARACTERISTICS (Ta=-20 85C; AVDD=TVDD=1.7~3.6V, DVDD=1.7~1.9V) Parameter Symbol min High-Level Input Voltage TVDD < 2.7V VIH 80%TVDD VIH 70%TVDD TVDD 2.7V Low-Level Input Voltage VIL TVDD < 2.7V VIL TVDD 2.7V Low-Level Output Voltage (SDA pin: Iout= 3mA) VOL Input Leakage Current Iin -
typ -
Max 20%TVDD 30%TVDD 0.4 10
Units V V V V V A
SWITCHING CHARACTERISTICS (Ta=-20 85C; AVDD=2.7 ~ 3.6V, TVDD=1.7~3.6V, DVDD=1. 7~1.9V) Parameter Symbol min fCLK 8.192 Master Clock Frequency dCLK 40 Duty Cycle LRCK Frequency fs 32 Duty Cycle Duty 45 Audio Interface Timing tBCK 1/128fs BICK Period tBCKL 30 BICK Pulse Width Low tBCKH 30 Pulse Width High tBLR 20 BICK rising to LRCK Edge (Note 6) tLRB 20 LRCK Edge to BICK rising (Note 6) tSDH 20 SDTI Hold Time tSDS 20 SDTI Setup Time Control Interface Timing (I2C Bus) fSCL SCL Clock Frequency tBUF 1.3 Bus Free Time Between Transmissions tHD:STA 0.6 Start Condition Hold Time (prior to first clock pulse) tLOW 1.3 Clock Low Time tHIGH 0.6 Clock High Time tSU:STA 0.6 Setup Time for Repeated Start Condition SDA Hold Time from SCL Falling (Note 7) tHD:DAT 0 SDA Setup Time from SCL Rising tSU:DAT 0.1 Rise Time of Both SDA and SCL Lines tR Fall Time of Both SDA and SCL Lines tF Setup Time for Stop Condition tSU:STO 0.6 Pulse Width of Spike Noise Suppressed by Input Filter tSP Capacitive load on bus Cb 0 Reset Timing tPD 150 PDN Pulse Width (Note 8) Note 6. BICK rising edge must not occur at the same time as LRCK edge. Note 7. Data must be held for sufficient time to bridge the 300 ns transition time of SCL. Note 8. The AK4145 can be reset by bringing the PDN pin = "L". Note 9. I2C is a registered trademark of Philips Semiconductors.
typ
max 36.8640 60 48 55
Units MHz % kHz % ns ns ns ns ns ns ns
400 0.3 0.3 50 400
kHz s s s s s s s s s s ns pF ns
Rev. 0.3-PB -6-
2007/12
[AK4145]
Timing Diagram
1/fCLK VIH VIL tCLKH tCLKL
dCLK=tCLKH x fCLK, tCLKL x fCLK
MCLK
1/fs VIH VIL
LRCK
tBCK VIH VIL tBCKH tBCKL
BICK
Figure 1. Clock Timing
LRCK tBLR tLRB
VIH VIL
BICK tSDS tSDH
VIH VIL
SDTI
VIH VIL
Figure 2. Serial Interface Timing
Rev. 0.3-PB -7-
2007/12
[AK4145]
VIH SDA VIL tBUF tLOW tR tHIGH tF tSP VIH SCL VIL tHD:STA Stop Start tHD:DAT tSU:DAT tSU:STA Start tSU:STO Stop
Figure 3. I2C Bus mode Timing
tPD
PDN
VIL
Figure 4. Power-down Timing
Rev. 0.3-PB -8-
2007/12
[AK4145]
PACKAGE
16pin TSSOP (Unit: mm)
*5.00.1 1.050.05
16
9 *4.40.1 A 6.40.2 0.170.05 Detail A 0.10.1 0-10 0.50.2 0.10
1 0.220.1
8 0.65
0.13 M
Seating Plane
NOTE: Dimension "*" does not include mold flash.
Material & Lead finish
Package molding compound: Epoxy Lead frame material: Cu Lead frame surface treatment: Solder plate (Pb Free)
Rev. 0.3-PB -9-
2007/12
[AK4145]
MARKING
AKM 4145ET XXYYY
1) 2)
3) 4)
Pin #1 indication Date Code : XXYYY (5 digits) XX: Lot# YYY: Date Code Marketing Code : 4145ET Asahi Kasei Logo
IMPORTANT NOTICE These products and their specifications are subject to change without notice. When you consider any use or application of these products, please make inquiries the sales office of Asahi Kasei EMD Corporation (AKEMD) or authorized distributors as to current status of the products. AKEMD assumes no liability for infringement of any patent, intellectual property, or other rights in the application or use of any information contained herein. Any export of these products, or devices or systems containing them, may require an export license or other official approval under the law and regulations of the country of export pertaining to customs and tariffs, currency exchange, or strategic materials. AKEMD products are neither intended nor authorized for use as critical componentsNote1) in any safety, life support, or other hazard related device or systemNote2), and AKEMD assumes no responsibility for such use, except for the use approved with the express written consent by Representative Director of AKEMD. As used here: Note1) A critical component is one whose failure to function or perform may reasonably be expected to result, whether directly or indirectly, in the loss of the safety or effectiveness of the device or system containing it, and which must therefore meet very high standards of performance and reliability. Note2) A hazard related device or system is one designed or intended for life support or maintenance of safety or for applications in medicine, aerospace, nuclear energy, or other fields, in which its failure to function or perform may reasonably be expected to result in loss of life or in significant injury or damage to person or property. It is the responsibility of the buyer or distributor of AKEMD products, who distributes, disposes of, or otherwise places the product with a third party, to notify such third party in advance of the above content and conditions, and the buyer or distributor agrees to assume any and all responsibility and liability for and hold AKEMD harmless from any and all claims arising from the use of said product in the absence of such notification.
Rev. 0.3-PB - 10 -
2007/12
[AK4145]
Thank you for your access to AKEMD product informations. More detail product informations are available, please contact our sales office or authorized distributors.
Rev. 0.3-PB - 11 -
2007/12

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