User Manual
[IK-CSR8645] Bluetooth Module for Audio
Features
- Dual-mode Bluetooth / Bluetooth low energy radio
- Stereo codec with 2 microphone inputs
- Fast Charging support up to 200mA with no external components
- Multipoint support for A2DP connection to 2 A2DP source for music playback
- aptX, SBC, MP3, AAC and Fast stream decoder
- Built-in Reference Clock: 26MHz
- RoHS Compliant
Applications
- Stereo headsets
- Wired stereo headset and headphones
- Portable stereo speakers
Device Overview
Dimensions
RF specification
Parameter (BDR transmitter) Min Typ Max Bluetooth Spec Unit
Maximum Transmit Power - - - -6 ~ +4 dBm
Power Density - - - - dBm
Power Control - -
Frequency Range 2402 - 2480 MHz
20dB Bandwidth for modulation carrier - 925 1000 ≤1000 kHz
Adjacent
Channel power
F=F0±2MHz - -36 -20 ≤-20 dBm
F=F0±3MHz - -42 -40 ≤-40 dBm
F=F0±≥3MHz - <-60 -40 ≤-40 dBm
Modulation
Characteristics
△F1avg 140 165 175 140<Fzavg<175 kHz
△F2max 115 135 - ≥115 kHz
△F2avg/△F1avg 0.8 0.9 - ≥0.80 -
Initial Carrier Frequency Tolerance -75 - 75 ±75 kHz
Carrier Frequency Drift
- - 5 20
≤20 kHz
Single slot packet - 6 25 ≤25 kHz
Five slot packet - 7 40 ≤40 kHz
Parameter (BDR receiver) Min Typ Max Unit
Sensitivity level(at 0.1% BER) - 82 -88 ≤-70 dBm
Maximum received signal(at 0.1% BER) - -20 >-10 ≥-20 dBm
C/I co-channel - 5 11 ≤11 dB
Maximum level of intermodulation interface -39 -30 - ≥-39 dBm
Parameter (EDR transmitter) Min Typ Max Unit
Relative transmit power -4 -1 - -4 to 1 dB
π/4 DQPSK max carrier
frequency stability
I ωο I - 1 10
≤10 for all blocks
kHz
I ωi I - 1 75
≤75 for all packets
I ωο+ ωi I - 2 75
≤75 for all blocks
8 DPSK max carrier
Frequency stability
I ωο I - 1 10
≤10 for all blocks
kHz
I ωi I - 1 75
≤75 for all packets
I ωο+ ωi I - 1.5 75
≤75 for all blocks
π/4 DQPSK modulation
RMS DEVM - 6 20 ≤20
%
99% DEVM - 12 30 ≤30
Peak DEVM - 16 35 ≤35
8DPSK modulation
Accuracy
RMS DEVM - 6 13 ≤13
99% DEVM - 12 20 ≤20
Peak DEVM - 15 25 ≤25
In-band spurious
Emissions
F>F0+3MHz - <-60 -40 ≤-40
dBm
F< F0-3MHz - <-60 -40 ≤-40
F= F0-3MHz - <-38 -35 ≤-40
F= F0-2MHz - -28 -20 ≤-20
F= F0-1MHz - -32 -26 ≤-26 dB
F= F0+1MHz - -32 -26 ≤-26 dB
F= F0+2MHz - -31 -20 ≤-20 dBm
F= F0+3MHz -45 -40 ≤-40
Block Diagram
PIN Description
Antenna / Chip Antenna
Frequency Range : 2 400 ~ 2 483.5 MHz
Peak Gain : 3.40 dBi
Regulatory
USA
The IK-CSR8645 module has been labeled with its own FCC ID number, and if the FCC ID is not
visible when the module is installed inside host audio device.
Then the outside of the finished product into which the module is installed must also display a label
referring to the enclosed module. This exterior label can use wording as follows:
Contains FCC ID: VNH-IK-CSR8645
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference,
And (2) this device must accept any interference received,
Including interference that may cause undesired operation
A user’s manual for the product should include the following statement
The following statement must be included as a
CAUTION statement in manuals to alert users
of FCC RF exposure compliance:
CANADA
The IK-CSR8645 module has been labeled with its own IC number, and if the IC is not visible when
the module is installed inside host audio device.
Then the outside of the finished product into which the module is installed must also display a label
referring to the enclosed module. This exterior label can use wording as follows:
Contains IC: 10581A-IKCSR8645
A user’s manual for the product should include the following statement