Analog Devices AD6140
The AD6140 is a bandpass Σ∆ ADC IF IC for receivers requiring a high dynamic range and multiple filter bandwidths. With an external decimation filter, it creates a multibit analog-to-digital converter. The AD6140 consists of a variable gain, low noise preamplifier, mixer, AGC detector, bandpass Σ∆ modulator, an ECL-to-CMOS level translator for the system clock, and an auxiliary amplifier for use in biasing a discrete LNA.FEATURES
IF Subsystem Bandpass ⌺⌬ Modulator Variable-Gain Preamplifier with 13 dB of AGC Range Mixer AGC Detector Op Amp for LNA Biasing ECL-to-CMOS Level Translator Ultralow Power Design 2.7 V Operating Voltage 4.8 mA Current Consumption Power-Down Control Small 20-Lead SSOP PackageAPPLICATIONS
FLEX™, ReFLEX™ Receivers Multimode Receivers Bandpass ⌺⌬ IF Subsystem AD6140 It is designed to operate with Motorola’s ReFLEX chipset solution. Contact Motorola directly for more information about the ReFLEX chipset solution. With data and clock outputs at CMOS logic levels, it interfaces to an external decimation filter. It comes in a 20-lead plastic SSOP and operates over the –40°C to +85°C industrial temperature range at 2.7 V.GENERAL DESCRIPTION
FUNCTIONAL BLOCK DIAGRAM LO_IN+ LO_IN– MIXER POST AMPLIFIER AD6140 ⌬ MODULATOR ⌬_DATA_OUT ⌬_CLOCK_OUT PREAMPLIFIER IF_INPUT LNA_SENSE LNA_FORCE LNA BIAS AMPLIFIER MIXER AGC DETECTOR CIRCUIT ECL-TO-CMOS LEVEL-SHIFTER BUFFER_VDD CLK_IN+ CLK_IN– AGC_...