XR-2211ACD Datasheet PDF - Exar Corporation
| Part Number | XR-2211ACD | |
| Description | FSK Demodulator/ Tone Decoder | |
| Manufacturers | Exar Corporation | |
| Logo |  |
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...the analog plus companyTM
XR-2211A
FSK Demodulator/
Tone Decoder
FEATURES
D Wide Frequency Range
0.01Hz to 300kHz
D Wide Supply Voltage Range 4.5V to 20V
D HCMOS/TTL/Logic Compatibility
D FSK Demodulation, with Carrier Detection
D Wide Dynamic Range
10mV to 3V rms
D Adjustable Tracking Range (+1% to 80%)
D Excellent Temp. Stability
100 ppm/°C, typ.
APPLICATIONS
D Caller Identification Delivery
D FSK Demodulation
D Data Synchronization
D Tone Decoding
D FM Detection
D Carrier Detection
September 1996-4
GENERAL DESCRIPTION
The XR-2211A is a monolithic phase-locked loop (PLL)
system especially designed for data communications
applications. It is particularly suited for FSK modem
applications. It operates over a wide supply voltage range
of 4.5 to 20V and a wide frequency range of 0.01Hz to
300kHz. It can accommodate analog signals between
10mV and 3V, and can interface with conventional DTL,
TTL, and ECL logic families. The circuit consists of a basic
PLL for tracking an input signal within the pass band, a
quadrature phase detector which provides carrier
detection, and an FSK voltage comparator which
provides FSK demodulation. External components are
used to independently set center frequency, bandwidth,
and output delay. An internal voltage reference
proportional to the power supply is provided at an output
pin.
The XR-2211A is available in 14 pin packages specified
for commercial temperature ranges.
ORDERING INFORMATION
Part No.
XR-2211ACP
XR-2211ACD
Package
14 Lead PDIP (0.300”)
14 Lead SOIC (Jedec, 0.150”)
Operating
Temperature Range
0°C to +70°C
0°C to +70°C
Rev. 1.01
E1995
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 z (510) 668-7000 z FAX (510) 668-7017
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XR-2211A
DC ELECTRICAL CHARACTERISTICS (Cont.)
Test Conditions: VCC = 12V, TA = +25°C, RO = 30KW, CO = 0.033mF, unless otherwise specified.
Parameter
Voltage Comparator Section
Input Impedance
Input Bias Current
Voltage Gain
Output Voltage Low
Output Leakage Current
Internal Reference
Voltage Level
Output Impedance
Maximum Source Current
Min.
55
4.75
Typ.
2
100
70
300
0.01
5.3
100
80
Max.
500
10
5.85
Unit Conditions
MW Measured at pins 3 and 8
nA
dB RL = 5.1KW
mV IC = 3mA
mA VO = 20V
V Measured at pin 10
W AC Small Signal
mA
Note:
- These parameters, although guaranteed over the recommended operating conditions, are not 100% tested in production.
- Bold face parameters are covered by production test.
Specifications are subject to change without notice
ABSOLUTE MAXIMUM RATINGS
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V
Input Signal Level . . . . . . . . . . . . . . . . . . . . . . . . 3V rms
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . 900mW
Plastic Package . . . . . . . . . . . . . . . . . . . . . . . . . 800mW
Derate Above TA = +25°C . . . . . . . . 6mW/°C
JEDEC SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . 390mW
Derate Above TA = +25°C . . . . . . . . . 5mW/°C
SYSTEM DESCRIPTION
The main PLL within the XR-2211A is constructed from an
input preamplifier, analog multiplier used as a phase
detector and a precision voltage controlled oscillator
(VCO). The preamplifier is used as a limiter such that
input signals above typically 10mV RMS are amplified to a
constant high level signal. The multiplying-type phase
detector acts as a digital exclusive or gate. Its output
(unfiltered) produces sum and difference frequencies of
the input and the VCO output. The VCO is actually a
current controlled oscillator with its normal input current
(fO) set by a resistor (R0) to ground and its driving current
with a resistor (R1) from the phase detector.
The output of the phase detector produces sum and
difference of the input and the VCO frequencies
(internally connected). When in lock, these frequencies
are fIN+ fVCO (2 times fIN when in lock) and fIN - fVCO (0Hz
when lock). By adding a capacitor to the phase detector
output, the 2 times fIN component is reduced, leaving a
DC voltage that represents the phase difference between
the two frequencies. This closes the loop and allows the
VCO to track the input frequency.
The FSK comparator is used to determine if the VCO is
driven above or below the center frequency (FSK
comparator). This will produce both active high and
active low outputs to indicate when the main PLL is in lock
(quadrature phase detector and lock detector
comparator).
Rev. 1.01
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for XR-2211ACD electronic component. |
| Information | Total 24 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ XR-2211ACD.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| XR-2211ACD | The function is FSK Demodulator/ Tone Decoder. Exar Corporation | |
| XR-2211ACP | The function is FSK Demodulator/ Tone Decoder. Exar Corporation | |
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