AD6140ARSRL AD [Analog Devices], AD6140ARSRL Datasheet

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AD6140ARSRL

Manufacturer Part Number
AD6140ARSRL
Description
Bandpass IF Subsystem
Manufacturer
AD [Analog Devices]
Datasheet
a
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.
FEATURES
IF Subsystem
Ultralow Power Design
Small 20-Lead SSOP Package
APPLICATIONS
FLEX™, ReFLEX™ Receivers
Multimode Receivers
Bandpass
Variable-Gain Preamplifier with 13 dB of AGC Range
Mixer
AGC Detector
Op Amp for LNA Biasing
ECL-to-CMOS Level Translator
2.7 V Operating Voltage
4.8 mA Current Consumption
Power-Down Control
AGC_CAPACITOR
AGC_TC_SELECT
Modulator
LNA_FORCE
LNA_SENSE
0.1 F
IF_INPUT
AMPLIFIER
LNA BIAS
PREAMPLIFIER
AVDD AGND DGND DVDD POWER_DOWN
LO_IN+
FUNCTIONAL BLOCK DIAGRAM
MIXER
DETECTOR
CIRCUIT
LO_IN–
AGC
MIXER POST
AMPLIFIER
BIAS SYSTEM
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
GENERAL DESCRIPTION
The AD6140 is a bandpass
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
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’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.
MODULATOR
Bandpass
R
INT
AD6140
LEVEL-SHIFTER
ECL-TO-CMOS
BIAS_RESISTOR
39k
World Wide Web Site: http://www.analog.com
BUFFER_VDD
CLK_IN+
CLK_IN–
BUFFER_GND
VOLTAGE_REFERENCE_IN
_DATA_OUT
_CLOCK_OUT
ADC IF IC for receivers requiring
IF Subsystem
© Analog Devices, Inc., 1998
AD6140
modulator, an

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AD6140ARSRL Summary of contents

Page 1

FEATURES IF Subsystem Bandpass Modulator Variable-Gain Preamplifier with 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 ...

Page 2

AD6140–SPECIFICATIONS Specification Conditions OVERALL VOLTAGE_REFERENCE_IN = 49.6 MHz LO = 49.792 MHz or 49.408 MHz, 200 mV p-p Clock = 6.144 MHz, 800 mV p-p Differential ECL Input Third Order Intercept Point At Max Gain Noise ...

Page 3

... Temperature Model Range AD6140ARS – +85 C AD6140ARSRL – +85 C CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD6140 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges ...

Page 4

AD6140 Pin Pin No Name 1 LNA_FORCE 2 LNA_SENSE 3 CLK_IN+ 4 CLK_IN– 5 BUFFER_GND _DATA_OUT _CLOCK_OUT 8 BUFFER_VDD 9 POWER_DOWN 10 AGC_TC_SELECT 11 DVDD 12 DGND 13 AGC_CAPACITOR 14 LO_IN+ 15 LO_IN– 16 BIAS_RESISTOR 17 VOLTAGE_REFERENCE_IN ADC Voltage Reference ...

Page 5

V = +2. –40 –20 25 TEMPERATURE – C Figure 1. Noise Figure vs. Temperature 12 +25 C 11.5 11.0 10.5 10.0 2.5 2.6 2.7 SUPPLY VOLTAGE – Volts Figure 2. Noise ...

Page 6

AD6140 5 + 5.0 4.8 4.6 4.4 2.5 2.6 2.7 POWER SUPPLY VOLTAGE – Volts Figure 7. Supply Current vs. Power Supply Voltage MODULATION A modulator uses feedback around a low noise quantizer (1 bit in ...

Page 7

AD6140. In addition to the mixer, there is a mixer post- amplifier within the AD6140. The total gain from the mixer and mixer post-amplifier is 5 dB. The modulator uses ...

Page 8

AD6140 LEVEL DIAGRAM Figure 10 shows a simplified block diagram of the AD6140 with the expected signal levels for the minimum gain configuration. LOCAL OSCILLATOR INPUT 49.792MHz –16.3 dBm REFERRED TO 50 MIXER POST AMPLIFIER PREAMPLIFIER MODULATOR IF INPUT MIXER ...

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