LTM9004 14-Bit Direct Conversion Receiver Subsystem FeaTuresDescripTion n Integrated Dual 14-Bit, High-Speed ADC, Lowpass The LTM®9004 is a 14-bit direct conversion receiver sub- Filter, Differential Gain Stages and I/Q Demodulator system. Utilizing an integrated system in a package (SiP) n Lowpass Filter for Each ADC Channel technology, the LTM9004 is a μModule® receiver that 1.92MHz(LTM9004-AA) includes a dual high speed 14-bit A/D converter, lowpass 4.42MHz(LTM9004-AB) filter, differential gain stages and a quadrature demodula- 9.42MHz(LTM9004-AC) tor. Contact Linear Technology regarding customization. 20MHz(LTM9004-AD) The LTM9004 is perfect for zero-IF communications n RF Input Frequency Range: 0.7GHz to 2.7GHz applications, with AC performance that includes 76dB n 50Ω Single-Ended RF and LO Ports SNR and 63.5dB spurious free dynamic range (SFDR). n I/Q Gain Mismatch: 0.2dB Typical The entire chain is DC-coupled and provides access for n I/Q Phase Mismatch: 1.5 Deg Typical DC offset adjustment. The integrated on-chip broadband n Voltage-Adjustable Demodulator DC Offsets transformers provide 50Ω single-ended interfaces at the n 76dB/1.92MHz SNR (LTM9004-AA) RF and LO inputs. n 63.5dB SFDR (LTM9004-AA) n Clock Duty Cycle Stabilizer A 5V supply powers the mixer and first amplifier for n Low Power: 1.83W minimal distortion while a 3V supply allows low power n Shutdown and Nap Modes ADC operation. A separate supply allows the outputs to n 15mm × 22mm LGA Package drive 0.5V to 3.3V logic. An optional multiplexer allows both channels to share a digital output bus. An optional clock duty cycle stabilizer allows high performance at full applicaTions n speed for a wide range of clock duty cycles. Telecommunications n Direct Conversion Receivers L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. µModule is a registered trademark of Linear Technology Corporation. n Cellular Basestations All other trademarks are the property of their respective owners. Typical applicaTion V LTM9004-AA: 64k Point FFT CC1 = 5V VCC3 = 3V VCC2 VDD fIN = 1950.5MHz, –1dBFSSENSE = VDD OVDD 0.5V TO 0 3.6V –10 –20 I –30 ADC –40 0° CLKOUT LNA –50 HD2 ADC CLK –60 MUX –70 HD3 OF 90° AMPLITUDE (dBFS) –80 ADC –90 Q –100 –110 OFFSET ADJUST OGND –120 0 4 8 12 16 20 LTM9004-AD FREQUENCY (MHz) DC OFFSET LO GND 9004 TA01b CONTROL 2 DAC 9004 TA01 9004fa For more information www.linear.com/LTM9004 1 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Dynamic Accuracy Converter Characteristics Digital Inputs and Outputs Power Requirements Timing Characteristics Timing Diagrams Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts
