AK2401 Datasheet, PDF (2/103 Pages) Asahi Kasei Microsystems – Direct Conversion Transceiver

[AK2401]
4. Table of Contents
1. General Description......................................................................................................................... 1
2. Features........................................................................................................................................... 1
3. Application ....................................................................................................................................... 1
4. Table of Contents ............................................................................................................................ 2
5. Block Diagram and Functions ......................................................................................................... 5
5.1. Block Diagram.............................................................................................................................. 5
5.2. Functions ..................................................................................................................................... 5
6. Pin Configurations and Functions ................................................................................................... 7
6.1. Pin Configurations ....................................................................................................................... 7
6.2. Pin Functions ............................................................................................................................... 8
6.3. Handling of Unused Pins ........................................................................................................... 10
7. Absolute Maximum Ratings........................................................................................................... 11
8. Recommended Operating Conditions ........................................................................................... 11
9. Digital Characteristics.................................................................................................................... 12
9.1. DC Characteristics ..................................................................................................................... 12
9.2. System Reset............................................................................................................................. 12
9.3. Serial Interface Timing for Register Access .............................................................................. 13
9.4. Serial Interface Timing for Programmable FIR Filter Coefficient Setting .................................. 14
9.5. Serial Interface Timing for ADC Data Readout ......................................................................... 14
9.6. Serial Interface Timing for DAC Data Write............................................................................... 15
10. Analog Characteristics .................................................................................................................. 16
10.1. Receiving Characteristics ...................................................................................................... 16
10.1.1. LNA ................................................................................................................................. 16
10.1.2. MIXER+PGA+AAF+ADC ................................................................................................ 16
10.1.3. LOCAL BUFFER+LOCAL DIVIDER (RX) ...................................................................... 18
10.1.4. PLL SYNTHESIZER ....................................................................................................... 18
10.1.5. RSSI................................................................................................................................ 19
10.2. Transmission Characteristics ................................................................................................. 20
10.2.1. DAC+SMF....................................................................................................................... 20
10.2.2. LOCAL BUFFER+LOCAL DIVIDER(TX)+DRIVER AMP ............................................... 20
10.3. Current Consumption ............................................................................................................. 21
11. Typical Performance Characteristics ............................................................................................ 22
12. Operation Sequence ..................................................................................................................... 22
12.1. Power-up Sequence............................................................................................................... 22
12.2. Power-up Sequence of PLL Synthesizer ............................................................................... 23
12.3. DC Offset Calibration Sequence............................................................................................ 24
13. Functional Descriptions ................................................................................................................. 25
13.1. Power Management ............................................................................................................... 25
13.2. Operation Mode Setting ......................................................................................................... 27
13.3. Level Diagram ........................................................................................................................ 28
13.3.1. Level Diagram of Analog Receiving Circuit .................................................................... 28
13.3.2. Level Diagram of Digital Receiving Circuit ..................................................................... 29
13.4. Analog Receiving Circuit (LNA) ............................................................................................. 30
13.5. Analog Receiving Circuit (MIXER, PGA, AAF) ...................................................................... 32
13.5.1. MIXER............................................................................................................................. 32
13.5.2. Analog Filter Frequency Characteristics......................................................................... 33
13.5.3. Output Path Selection of Analog Baseband Signal ........................................................ 34
13.6. LOCAL BUFFER, LOCAL DIVIDER ...................................................................................... 35
13.6.1. LOCAL BUFFER............................................................................................................. 35
13.6.2. LOCAL DIVIDER............................................................................................................. 35
13.6.3. Phase Calibration............................................................................................................ 35
13.7. PLL SYNTHESIZER............................................................................................................... 38
13.7.1. CHARGE PUMP, LOOP FILTER ................................................................................... 38
13.7.2. Frequency Setting........................................................................................................... 39
13.7.3. Frequency Offset Adjustment ......................................................................................... 39
017003093-E-00
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