NOTE: This is a summary document.
The complete document is available
under NDA. For more information,
please contact your local Atmel sales
office.
Features
•Highly Integrated Digital Device for DAB Receivers (Eureka 147)
•Utilizes the ARM7TDMI® Core
– High-performance 32-bit RISC Architecture
– High-density 16-bit Instruction Set
– Embedded ICE (In-Circuit Emulation)
•Utilizes TeakDSPCore™
– 16-bit Fixed-point Digital Signal Processing Core
•HDAB OFDM Channel Demodulator and Decoder
– Fully Integrated, Supports all DAB Functions and Modes
– Full Data Rate of 1.8 Mbit Can Be Decoded
– Automatic Mode Detection (AMD)
– Digital AFC (Frequency Tolerance < 0.5 Hz for Mode I)
– Digital AGC with a Wide Gain Control Range
– Demodulation and Decoding of up to 64 UEP/EEP Sub-channels
•Audio Source Decoder (ASD) and Data Decoder (DD)
– On-chip De-interleaver Memory for Full 1.8 Mbit/s Decoding Data Rate
– PAD Extraction
– Two Independent Data Packet Mode Decoder
•Integrated High-density SRAM Supporting Time and Frequency De-interleaving
•10 Msps High-speed Low-power Pipelined ADC
– Supports Wide IF Range of 2.048 MHz to 50 MHz
– Complex Bandpass Filtering
– Optional SAW Filter Equalization
•ARM7TDMI Core User Software Extension
– Audio Player MP3 Support
•Large Variety of Interfaces
–I
2S/SPDIF, SFCO, SSO, RDI, RS-232, USART
– USB V1.1 Full Speed
– Two USARTs
– CAN 2.0A and 2.0B
•Master/Slave SPI Interface
– Two Dedicated Peripheral Data Controller (PDC) Channels
– 8- to 16-bit Programmable Data Length
– Four External Slave Chip Selects
•Programmable Watchdog Timer
•Power Management Controller (PMC)
– CPU and Peripherals Can Be De-activated Individually
– Simple But Comfortable Gearing and Clocking Unit
•32 User Programmable I/O Lines (PIO)
•Low-power Consumption for Portable Applications (3.3V and 1.8V)
•Robust LQFP128 Package, BGA121 Package
•Very Low External Component Count
DAB Digital
Processing
Device
ATR2740
Summary
4816FS–DAB–07/08
2
4816FS–DAB–07/08
ATR2740
1. Description
The ATR2740 is a fully integrated processing unit which covers all DAB- (Eureka 147,
ETS 300 401) related digital tasks like DAB OFDM demodulation and decoding, audio source
decoding, data decoding, as well as time and frequency synchronization.
The device consists of a high-performance 32-bit RISC ARM7TDMI core, an additional
TeakDSPCore, embedded memories, an analog-to-digital converter (ADC), as well as a DAB
channel demodulator and decoder IP, and two independent audio source decoder engines. A
large variety of interfaces, including USB, SPI, USART and RDI, are provided.
The ATR2740 baseband processor is controlled by a standard ARM7TDMI core, which is a very
well-known controller. This allows the designers to work with standard tools, which results in
reduced development costs and very fast time to market.
The ARM7TDMI core is designed to perform the DAB receiver tasks, MMI and further user soft-
ware extensions such as MP3 decoding or data decoding.
The ATR2740 is manufactured using Atmel’s high-density CMOS technology. By combining all
functions on one SoC (System-on-Chip), including a wide range of peripheral functions on a
monolithic chip, the ATR2740 provides a highly flexible and cost-effective solution for DAB
applications.
The advanced Atmel technology and the architecture of the ATR2740 enable maximum perfor-
mance at a very low current consumption.
The wide flexibility offered by the ATR2740 is due to the large variety of interfaces supported.
For control functions, UART, USB, and SPI are available. As data interfaces, an SSO, SFCO,
US Band RDI, as well as two audio outputs (either I2S or SPDIF), are available.
Due to the high integration of the device, the external component count is as low as only two
external parts; a simple crystal and a 16-MB flash memory are required to run the full DAB func-
tion. All RAM, such as interleaving or program memory, as well as the ADC are incorporated into
the device. The part works perfectly together with Atmel’s DAB front-end parts.
The processing power available with the ATR2740 is sufficient to enable the part to decode the
full DAB data rate of 1.8 Mbits. In addition, there is still unused processing power available on
the ARM7TDMI controller for customer software. It is easy to run a complete MP3 player without
the need to add extra hardware to the device.
A complete set of tools for hardware and software, including documentation that allows easy
design-in and a fast time to market, is available on request.
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4816FS–DAB–07/08
ATR2740
Figure 1-1. Block Diagram
ADC
ARM7TDMI System
RESET
DAB
Channel Decoder
VINP
TXRDI
Signal
Processing
CORE
ADC_DATA
Clock
Generation
CAN
Address bus
I2S/SPDIF
VINN
VCM
ATR2740
Data bus
Control
USART1
USART2
SPI
SFCO
Watchdog
IRQ0
IRQ1
IRQ3
JTAG
SSO
USB
Advanced
Power
Management
XO
GPIO
Watchdog
I2S/SPDIF
4
4816FS–DAB–07/08
ATR2740
Electrostatic sensitive device.
Observe precautions for handling.
2. Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Parameters Symbol Min. Max. Unit
Operating free air temperature range for LQFP128 –40 +85 °C
Operating free air temperature range for BGA121 –10 +70 °C
Storage temperature TStg –60 +150 °C
DC supply voltage
VDD18 –0.3 +1.95 V
VDD33 –0.3 +3.6 V
AVDD –0.3 +3.6 V
DC input voltage –0.3 +1.95 V
Notes: 1. The part may not survive if all maximums are applied simultaneously.
3. DC Electrical Characteristics
Test conditions (if not otherwise specified): VCC = +1.8V, Tamb = +25°C
No. Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit Type*
1.1 DC supply voltage VDD18 1.65 1.8 1.95 V D
1.2 Low-level input
voltage VDD18 = 1.65 to 1.95V VIL –0.3 +0.3 ×
VDD18 VD
1.3 High-level input
voltage VDD18 = 1.65 to 1.95V VIH +0.7 ×
VDD18
VDD18
+ 0.3 VD
1.4 Low-level output
voltage
IOL = 1.5 mA
VDD18 = 1.65V VOL 0.4 V C
1.5 High-level output
voltage
IOH = –1.5 mA
VDD18 = 1.65V VOH 1.2 V C
1.11 Crystal oscillator
frequency 24.576 MHz D
1.12 Clock duty cycle 40 60 % D
1.14 USB DC supply
voltage Full speed VDD33 3 3.3 3.6 V D
1.15 USB input low level VILUSB 0.8 V D
1.16 USB input high level VIHUSB 2.0 V D
1.17 USB differential input
sensitivity VDIUSB 0.2 V D
1.18 USB differential input
common mode range VCMUSB 0.8 2.5 V D
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
5
4816FS–DAB–07/08
ATR2740
1.19 USB output low level VOLUSB 0.0 0.3 V D
1.20 USB output high level VOHUSB 2.8 3.6 V D
1.21 Transition rise time Full speed TFR 4 20 ns D
1.22 Transition fall time Full speed TFE 4 20 ns D
1.23 USB crystal oscillator
frequency FUSB 8 MHz D
1.24 USB clock duty cycle 40 60 % D
1.25 JTAG TCK frequency FTCK 0.02 33 MHz D
3. DC Electrical Characteristics (Continued)
Test conditions (if not otherwise specified): VCC = +1.8V, Tamb = +25°C
No. Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit Type*
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
4. Electrical Characteristics on ADC/IF Input
Test conditions (if not otherwise specified): VCC = +3.3V, Tamb = +25°C
No. Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit Type*
2.1 ADC DC supply
voltage AVDD 3 3.3 3.6 V D
2.2 IF frequency range FIF 2.048 50 MHz D
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
5. DC Power Consumption
Test conditions (if not otherwise specified): VCC = +1.8V, Tamb = +25°C
Mode Conditions Typ. Max. Unit
Core Power Consumption
DAB full Decode of all MSC’s and 1 audio sub-channel 80 mA
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4816FS–DAB–07/08
ATR2740
7. Package Information LQFP128
6. Ordering Information
Extended Type Number Package Remarks
ATR2740-RQHH LQFP128 16 mm × 16 mm, 0.40 mm pitch, lead free
ATR2740-7GHG BGA121 10 mm × 10 mm, 0.80 mm pitch, lead free
specifications
according to DIN
technical drawings
Issue: 1; 15.09.03
Drawing-No.: 6.543-5103.01-4
Dimensions in mm
(acc. JEDEC OUTLINE No. MS-026)
Package: LQFP 128
0.1±0.05
0.16±0.05
0.6±0.15
14±0.1
16±0.2
12.4
33 64
128
65
96
1.6 max.
3.5
˚
±3.5˚
32
1
97
0.4
0.15-0.06
+0.05
7
4816FS–DAB–07/08
ATR2740
8. Package Information BGA121
Package: R-LFGBA 121_A
Dimensions in mm n 0.08 m
AB
C
A1 Corner
A1 Corner
n 0.15 m ∅ 0.32 ... 0.42 (121x)
10±0.05
10±0.05
0.8
8
A
C0.15 (4x)
B
C
C
0.2
C0.08
1.4 max
(0.26)
0.53 ref.
0.22 ... 0.32
Seating plane
A
B
E
H
L
K
J
G
F
C
D
A
B
E
H
L
K
J
G
F
C
D
Bottom View
Top View
123 456789 1110 1011 98 76 543 21
specifications
according to DIN
technical drawings
Issue: 1; 20.08.04
Drawing-No.: 6.580-5002.01-4
0.8
8
8
4816FS–DAB–07/08
ATR2740
9. Revision History
Please note that the following page numbers referred to in this section refer to the specific revision
mentioned, not to this document.
Revision No. History
4816FS-DAB-06/08
• All pages and page 1: Preliminary deleted
• Page 1: Broadcast radio logo deleted
• Page 4-5: DC El. Char. Table: some changes
• Page 5: El. Char. on ADC/IF Input Table: some changes
4816FS–DAB–07/08
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© 2008 Atmel Corporation. All rights reserved. Atmel®, logo and combinations thereof, and others, are registered trademarks or trademarks
of Atmel Corporation or its subsidiaries. ARM7TDMI® is a registered trademark of ARM Ltd. TeakDSPCore™ is a trademark of DSP Group Inc. Other
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