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AD6140ARSRL Datasheet

  • AD6140ARSRL

  • Bandpass IF Subsystem

  • 8頁(yè)

  • AD

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a
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 Package
APPLICATIONS
FLEX鈩? ReFLEX鈩?Receivers
Multimode Receivers
Bandpass
GENERAL DESCRIPTION
IF Subsystem
AD6140
The AD6140 is a bandpass
危鈭?/div>
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
危鈭?/div>
modulator, an
ECL-to-CMOS level translator for the system clock, and an
auxiliary amplifier for use in biasing a discrete LNA. It is de-
signed to operate with Motorola鈥檚 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 鈥?0擄C to +85擄C
industrial temperature range at 2.7 V.
FUNCTIONAL BLOCK DIAGRAM
LO_IN+
LO_IN鈥?/div>
MIXER POST
AMPLIFIER
AD6140
_DATA_OUT
MODULATOR
_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鈥?/div>
AGC_CAPACITOR
0.1 F
AGC_TC_SELECT
BIAS SYSTEM
BUFFER_GND
VOLTAGE_REFERENCE_IN
R
INT
AVDD AGND DGND DVDD POWER_DOWN
BIAS_RESISTOR
39k
FLEX and ReFLEX are trademarks of Motorola, Inc.
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
漏 Analog Devices, Inc., 1998

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