AS3658 Datasheet, PDF (1/3 Pages) ams AG – Power and Audio Management Unit for Portable Devices

AS3658
Product Brief
AS3658
Power and Audio Management Unit for Portable Devices
Product Brief
1 General Description
The AS3658 is highly integrated power and audio
management unit. It includes all the features from
the AS3654 and adds on top an 16 bit Audio ADC,
a second headphone amplifier, a microphone bias
with amplifier, a RTC with alarm and time function,
an unique ID block and three more LDOs.
2 Key Features
ƒ 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 (5s, SW-
Interuptable)
− Touchscreen Interface (10 bit, interrupt)
ƒ Supply Voltage Generation
− 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 automatically 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)
ƒ 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)
ƒ 10-bit 40μs Successive Approximation ADC
− Two external Inputs (ADC_IN1, ADC_IN2)
ƒ Battery Management
− Full featured chemistry independent step
down charger with Gas Gauge and Current
limitation
− High Current (1.0A) Linear Charger with
external pass transistor (no SD 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 (0°C-45°C or 0°C- 50°C) for
10k and 100k NTC
− Charging Timeout (1h-8h in 30min steps)
− Charging in Stanby mode
− Completely Autonomous (no SW)
ƒ Power Management Features
− Wide Battery Supply Range 3.0…5.5V
− High Accuracy Reference (±1%)
− Thermal and Current Protection (int.
sensor)
− Standby Mode exit by interrupt
e.g.Onkey/RTC
ƒ 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
− Mono Microphone Supply and Amplifier
− 5 Band Adjustable Audio Equalizer (+/-
12dB in 3dB gain steps)
− SPDIF Output
− Audio Mixer and Gain Stages
− PCM Interface
ƒ Real Time Clock (RTC)
− Alarm and Time function
− Repeated Wakeup (every sec. or minute)
− 32kHz output
− Backup Battery Charger and Switchover
ƒ Programmable System clock
− 1.6 MHz to 2.3 MHz with 100 kHz steps
ƒ Package
− BGA124 8x8mm, 0.5mm pitch (can be
assembled without microvia boards)
3 Application
− PDA, PMP, GPS-Navigation System
− 1 Cell Li+ or 3 Cell NiMH powered devices
www.austriamicrosystems.com (ptr)
Revision 1.4 / 20071217
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