© Semtech 2005 www.semtech.com
4
XE3005/XE3006
1.1 TERMINALS DESCRIPTION XE3005/6
Terminals
Description
XE3006 XE3005 Name Type
1
TSSOP24 TSSOP20
uCSP
®
1 1 A2 MCLK DI
Master Clock. MCLK derives the internal clocks of ADC and
DAC
2 N/A N/A SMAD DO Sandman output ADC
3 N/A N/A SMDA DO Sandman output DAC
4 3 A1 VDD AI Digital power supply
5 4 B1 NRESET ZI/O
Reset signal generated by the CODEC. If required, the reset
signal can be applied externally to initialize all the internal
CODEC registers
6 N/A N/A VSSA AI Analog ground
7 5 C2 VREG16 AO
Regulator voltage 1.6 V. Can be used to supply the
microphone
8 6 C1 VREF AO Reference voltage
9 7 D1 VSSA AI Analog ground
10 8 D2 VSSD AI Digital ground
11 9 E2 VREG11 AO ADC Regulated microphone output supply voltage 1.1 V
12 10 E1 AIN AI ADC Analog input signal
13 11 E3 VSSPA AI DAC Power Amplifier Ground
14 12 E4 AOUTN AO DAC Analog Output negative
15 13 D3 VDDPA AI DAC Power Amplifier Supply
16 14 D4 AOUTP AO DAC Analog Output positive
17 15 C3 FSYNC DI/O Serial audio interface Frame Synchronization
18 16 C4 BCLK DI/O Serial audio interface Bit Clock
19 17 B3 SDO ZO Serial audio interface Data Output
20 18 B4 SDI DI PD Serial audio interface Data Input
21 N/A N/A MISO ZO SPI Master In Slave Out
22 19 A4 SCK DI PD SPI Serial Clock
23 2 B2 SS DI PU SPI Slave Select
24 20 A3 MOSI DI PD SPI Master Out Slave In
Note: (1) AI = Analog Input AO = Analog Output
DI = Digital Input DO = Digital Output
DI/O = Digital In or Out ZO = Hi Impedance or Output
PU = internal Pull Up PD = internal Pull Down
ZI/O = Hi impedance In or Out
© Semtech 2005 www.semtech.com
5
XE3005/XE3006
2 FUNCTIONAL DESCRIPTION
A CODEC is typically used for voice and audio applications as an interface between a Digital Signal processor (DSP) or
microcontroller and the analogue interfaces like a microphone and loudspeaker.
ADC
DAC
DSP / Microcontroller
Digital wireless transmission – Bluetooth™
Voice recognition / speech synthesis
Power Amplifier
MIC-Amplifier
SPI
Serial Audio Interface
CODEC
Figure 3: Typical usage of CODEC
This chapter provides a brief description of the CODEC features relating to the CODEC configuration. The configuration
of the CODEC is defined by programming registers through a serial interface. A detailed description of the registers
defining details of the CODEC setup can be found in chapter 3 and 7. Digital voice and audio samples are passed
through the Serial Audio Interface.
2.1 DEVICE FUNCTIONS
2.1.1 ADC Signal Channel
The ADC channel is a chain of programmable amplifier, band-pass filter, sigma-delta modulator and a decimation filter.
The amplifier gain is programmable to 5x (default) and 20x. The band-pass filter has cut-off frequencies proportional to
the sampling rate. The sigma-delta modulator operates at a frequency of 64 times the sampling rate. The analog
modulator is followed by a digital decimation filter. The digital output data (16 bits, 2’s complement format) is made
available through the Serial Audio Interface. The format of the Serial Audio interface can be selected through register J.
With the default register settings the ADC can run at a sampling frequency up to 20 kHz. When used with a sampling
frequency higher than 20 kHz, then register C has to be changed.
The whole ADC chain can be powered-down through register I.
© Semtech 2005 www.semtech.com
6
XE3005/XE3006
2.1.2 MIC Input
The programmable pre-amplifier and the microphone bias sources VREG11 or VREG16 are optimized to operate with
electret microphones. VREG11 provides a 1.1 V reference voltage. The VREG11 can deliver up to 50 µA. VREG11 is
enabled through control register E. VREG16 is a regulated voltage of typically 1.6V and can deliver up to 1 mA.VREG16
is always enabled.
GND
V
cc
0.1µF
1µF
1µF
390k
5
6
7
8
9
10
11
12
VDD
NRESET
VSSA
VREG16
VREF
VSSA
VSSD
VREG11
AIN
4
1k
50 pF (gain is 5)
200 pF (gain is 20)
XE3006
Figure 4: Typical microphone interface (1.1 V / 50 uA bias through VREG11)
GND
50 pF (gain is 5)
200 pF (gain is 20)
5
6
7
8
9
10
11
12
VDD
NRESET
VSSA
VREG16
VREF
VSSA
VSSD
VREG11
4
1k
*
*
depends on microphone type
XE3006
V
cc
0.1µF
1µF
1µF
390k
AIN
Figure 5: Typical microphone interface (1.6 V / 1 mA bias through VREG16)

XE3005I033TRLF

Mfr. #:
Manufacturer:
Semtech
Description:
IC CODEC LOW PWR 16BIT 20-TSSOP
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet