LMH6523SQ/NOPB

LMH6523 www.ti.com SNOSC88 – DECEMBER 2012 High Performance Quad DVGA Check for Samples: LMH6523 • OIP3: 49dBm at 200MHz Noise Figure: 8.5dB Voltage Gain: 26dB 1dB Gain Steps Enable Pins Active in SPI Mode −3dB Bandwidth of 1400 MHz Gain Step Accuracy: 0.2 dB Disable Function for Each Channel Parallel and Serial Gain Control Low Power Mode for Power Management Flexibility Small Footprint WQFN Package APPLICATIONS • • • • Cellular Base Stations Wideband and Narrowband IF Sampling Receivers Wideband Direct Conversion ADC Driver DESCRIPTION The LMH6523 contains four, high performance, digitally controlled variable gain amplifiers (DVGA). It has been designed for use in narrowband and broadband IF sampling applications. Typically, the LMH6523 drives a high performance ADC in a broad range of mixed signal and digital communication applications such as mobile radio and cellular base stations where automatic gain control (AGC) is required to increase system dynamic range. The LMH6523 digitally controlled attenuator provides precise 1dB gain steps over a 31dB range. The digital attenuator can be controlled by either a SPI™ Serial bus or a high speed parallel bus. The output amplifier has a differential output, allowing large signal swings on a single 5V supply. The low impedance output provides maximum flexibility when driving a wide range filter designs or analog to digital converters. For applications which have very large changes in signal level LMH6523 can support up to 62dB of gain range by cascading channels. The LMH6523 operates over the industrial temperature range of −40°C to 85°C. The LMH6523 is available in a 54-Pin, thermally enhanced, WQFN package. PERFORMANCE CURVE 60 35 50 30 40 25 30 20 20 f = 200MHz 15 10 VOUT = 2VPPD @ filter input 10 POWER GAIN (dB) • • • • • • • • • • 2 Each channel of LMH6523 has an independent, digitally controlled attenuator and a high linearity, differential output, amplifier. All circuitry has been optimized for low distortion and maximum system design flexibility. Power consumption is managed by a three-state enable pin. Individual channels can be disabled or placed into a Low Power Mode or a higher performance, High Power Mode. The enable pin is active in both serial and parallel modes for systems that require high speed power control. OIP3 (dBm) FEATURES 1 5 0 50 100 150 200 250 300 FILTER INPUT RESISTANCE ( ) SVA-30206581 1 2 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. SPI is a trademark of Motorola, Inc. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2012, Texas Instruments Incorporated LMH6523 SNOSC88 – DECEMBER 2012 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. BLOCK DIAGRAM +5V Attenuator INA+ OUTA+ 26dB INA- OUTA- 0dB to 31dB Attenuator INB+ OUTB+ 26dB INB- ATTEN_A 5 EN_A 4 SPI ATTEN_D OUTB- 0dB to 31dB 5 5 Digital Control, (Serial or Parallel) EN_B MODE 5 EN_D INC+ ATTEN_B ATTEN_C EN_C Attenuator OUTC+ 26dB INC- IND+ OUTC- 0dB to 31dB Attenuator OUTD+ 26dB IND- 0dB to 31dB OUTD- GND SVA-30206532 2 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Links: LMH6523 LMH6523 www.ti.com SNOSC88 – DECEMBER 2012 ABSOLUTE MAXIMUM RATINGS (1) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and specifications. VALUE UNIT 2 kV Machine Model 200 V Charged Device Model 750 V Human Body Model ESD Tolerance (2) Positive Supply Voltage (Pin 3) –0.6 to 5.5 V