austriamicrosystems AG
is now
ams AG
The technical content of this austriamicrosystems datasheet is still valid.
Contact information:
Headquarters:
ams AG
Tobelbaderstrasse 30
8141 Unterpremstaetten, Austria
Tel: +43 (0) 3136 500 0
e-Mail:
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Please visit our website at
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AS3658
1 General Description
The AS3658 is highly integrated power and audio
management unit. The AS3658 is designed to include
sophisticated audio features like high performance
audio DAC and ADC. It has several analog and digital
audio interface which are explained in detail in the
following sections. The AS3658 is an integrated solution
for power supply generation and monitoring, battery
management including charging.
D a ta S h e e t C o n f i d e n t i a l
P o w e r a n d A u d i o M a n a g e m e n t U n i t f o r P o r ta b l e D e v i c e s
- High Current (1.0A) Linear Charger with external
pass transistor (no step down charger)
- 0.1
Ω
Battery switch for start-up and trickle charge
- Integrated USB charger up to 880mA (can be used
as wall adapter charger); current accuracy 440-
500mA for USB specification, in-circuit trimmable
(±1.2% trimsteps)
- Autonomous Battery Temperature Supervision
(0ºC-45ºC or 0ºC- 50ºC) for 10k and 100k NTC
- Charging Timeout (1h-8h in 30min steps)
- Charging in Stanby mode
- Completely Autonomous (no SW)
Power Management Features
2 Key Features
System Control
- Serial Control Interface
- On/Off Control Module with Boot-ROM / GPIO
- Reset Generation for system controller
- Programmable Interrupt Controller and Watchdog
- Low power off mode (9µA; 2.5V LDO on)
- 88 bit unique ID or Boot fuse array
- Reset with long ON-Keypress (SW-Interuptable)
- Touchscreen Interface (10 bit, interrupt)
Supply Voltage Generation
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- 2 RF Programmable Low Noise LDOs (250mA) (1
LDO can be a current controlled switch for hotplug
(200mA ± 40%))
- 1 RF Programmable Low Noise LDO (400mA)
- 4 Programmable Dig. Low Power LDOs(200mA)
- 2 General Purpose PWM DC/DC step up converter
with three programmable current sinks (e.g. for-
white led); for current mode feedback is automati-
cally slected (DCDC_CURR1,2,3)
- 3 General Purpose high efficiency DC/DC step
down converter (DCDC 1 support DVM)
- 1 Low noise charge pump with 5V output voltage
- 1 Ultra Low Power 2.5V LDO (always on)
Current sinks
- 4 programmable(8-bit) from 0.15mA to 38.25mA
(±5% ) optional useable as GPIOs
- 3 programmable high voltage (15V) (8-bit) from
0.15mA to 38.25mA (±5% )
- internal PWM generator (extended time range)
(can control DCDC_CURR1,2,3)
10-bit 40µs Successive Approximation ADC
- Two external Inputs (ADC_IN1, ADC_IN2)
Battery Management
- Full featured chemistry independent step down
charger with Gas Gauge and Current limitation
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- Alarm and Time function
- Repeated Wakeup (every second or minute)
- 32kHz output
- Backup Battery Charger and Switchover
Programmable System clock
- 1.6 MHz to 2.3 MHz with 100 kHz steps
Package
Revision 1v13
- Wide Battery Supply Range 3.0…5.5V
- On-Chip Bandgap Tuning for High Accuracy (±1%)
- Thermal and Current Protection (int. sensor)
- Standby Mode exit by interrupt e.g. Onkey/RTC
Audio
94dB Audio DAC, 16-48kHz sampling rate
Two Digital Audio Inputs (2 x I2S interface)
2.9V low Noise LDO for Audio DAC
Two Headphone Amplifier Output with GND
separation
- Two I2S Inputs and one I2S Output
- I2S master mode with programmable sample rate
(controlled by internal PLL)
- GND Buffer for Headphone Amplifier
- Line/ Headphone outputs with GND separation
- Audio ADC, 82dB SNR with 16ksps
- Microphone Bias Supply and Amplifier (mono)
- 5 Band Adjustable Audio Equalizer (± 12dB in 3dB
gain steps)
- SPDIF Output
- Audio Mixer and Gain Stages
- PCM Interface
Real Time Clock (RTC)
- BGA124 8x8mm, 0.5mm pitch (can be assembled
without micro via boards)
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AS3658
Data Sheet Confidential
- Applications
3 Applications
The AS3658 is ideal for PDA, PMP, GPS-Navigation Systems and 1 Cell Li+ or 3 Cell NiMH powered devices.
Figure 1. Blockdiagram
AS3658
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AS3658
Data Sheet Confidential
- Applications
Figure 2. Application Diagram
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AS3658
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AS3658
Data Sheet Confidential
- Applications
Table of Contents
1 General Description
2 Key Features
3 Applications
..............................................................................................................................1
.........................................................................................................................................1
...........................................................................................................................................2
................................................................................................................................... 6
...............................................................................................................................................7
4 Pin Assignments
4.1 Pin Description
5 Absolute Maximum ratings
6 Electrical Characteristics
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7 Typical Operating Characteristics
8.1 Step Up DC/DC Converters
8.2 Current Sinks
8 Detailed Description-Power Management Functions
8.3 General Purpose Input / Output (CURR1_GPIO1 … CURR4_GPIO4)
8.4 Backup Battery Charger
8.5 Smooth switchover Power Management Overview
8.6 Battery switch SINT (Vsupply, Battery)
8.7 External Step Down/Linear Charger
8.8 USB Charger
8.9 Battery Charge Controller
8.10 Charger supervision functions
8.11 Step Down DC/DC Converters
8.13 5V Charge Pump
9.1 Audio Paths
8.12 Low Dropout Regulators (LDO)
9 Detailed Description- Audio Functions
.................................................................................................................................................87
...........................................................................89
.................................................................................................................................90
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9.2 Common mode voltage generation of HP_CM, LINE_CM
9.3 Audio Setup Registers
9.4 ADC, DAC and Digital Audio Input
9.5 I2S master mode and PCM Mode
9.6 Line Input
9.7 Five Band Equalizer
9.8 Microphone Input
9.10 Line Output
9.9 Audio Output Mixer
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10 Detailed Description - System Functions
10.1 2C Serial Interface
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9.11 Headphone Output
9.12 SPDIF output
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10.2 Reset generator and XON-Key
10.3 Interrupt Controller
10.5 Protection Functions
10.6 Watchdog
10.4 Startup
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10.7 General Purpose 10 Bit ADC
10.8 Internal References (V, I, fclk)
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