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Analog Devices - Interpolating Dual TxDAC+ D/A Converter

Numéro de référence AD9777
Description Interpolating Dual TxDAC+ D/A Converter
Fabricant Analog Devices 
Logo Analog Devices 





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AD9777 fiche technique
16-Bit, 160 MSPS 2x/4x/8x
Interpolating Dual TxDAC+® D/A Converter
AD9777
FEATURES
16-bit resolution, 160 MSPS/400 MSPS input/output
data rate
Selectable 2×/4×/8× interpolating filter
Programmable channel gain and offset adjustment
fS/4, fS/8 digital quadrature modulation capability
Direct IF transmission mode for 70 MHz + IFs
Enables image rejection architecture
Fully compatible SPI® port
Excellent ac performance
SFDR −73 dBc @ 2 MHz to 35 MHz
WCDMA ACPR 71 dB @ IF = 19.2 MHz
Internal PLL clock multiplier
Selectable internal clock divider
Versatile clock input
Differential/single-ended sine wave or
TTL/CMOS/LVPECL compatible
Versatile input data interface
Twos complement/straight binary data coding
Dual-port or single-port interleaved input data
Single 3.3 V supply operation
Power dissipation: typical 1.2 W @ 3.3 V
On-chip 1.2 V reference
80-lead thin quad flat package, exposed pad (TQFP_EP)
APPLICATIONS
Communications
Analog quadrature modulation architecture
3G, multicarrier GSM, TDMA, CDMA systems
Broadband wireless, point-to-point microwave radios
Instrumentation/ATE
FUNCTIONAL BLOCK DIAGRAM
AD9777
16
I AND Q
NONINTERLEAVED
OR INTERLEAVED
DATA
16
DATA
ASSEMBLER
HALF-
BAND
FILTER1*
I 16
LATCH
16
HALF- HALF-
BAND
BAND
FILTER2* FILTER3*
16 16
Q 16
LATCH
16
16 16
COS
SIN
fDAC/2, 4, 8
SIN
IMAGE
REJECTION/
DUAL DAC
MODE
BYPASS
MUX
WRITE
SELECT
MUX
CONTROL
CLOCK OUT
/2
SPI INTERFACE AND
CONTROL REGISTERS
/2
/2
* HALF-BAND FILTERS ALSO CAN BE
CONFIGURED FOR ZERO STUFFING ONLY
FILTER
BYPASS
MUX
/2
COS
(fDAC)
PRESCALER
PHASE DETECTOR
AND VCO
PLL CLOCK MULTIPLIER AND CLOCK DIVIDER
Figure 1.
IDAC
GAIN
DAC
OFFSET
DAC
I/Q DAC
GAIN/OFFSET
REGISTERS
IDAC
IOUT
DIFFERENTIAL
CLK
Rev. C
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 that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
www.analog.com
© 2006 Analog Devices, Inc. All rights reserved.

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