AD9627_15 Datasheet, PDF (1/76 Pages) Analog Devices – 12-Bit, 80 MSPS/105 MSPS/125 MSPS/150 MSPS

12-Bit, 80 MSPS/105 MSPS/125 MSPS/150 MSPS,
1.8 V Dual Analog-to-Digital Converter
AD9627
FEATURES
SNR = 69.4 dBc (70.4 dBFS) to 70 MHz @ 125 MSPS
SFDR = 85 dBc to 70 MHz @ 125 MSPS
Low power: 750 mW @ 125 MSPS
SNR = 69.2 dBc (70.2 dBFS) to 70 MHz @ 150 MSPS
SFDR = 84 dBc to 70 MHz @ 150 MSPS
Low power: 820 mW @ 150 MSPS
1.8 V analog supply operation
1.8 V to 3.3 V CMOS output supply or 1.8 V LVDS
output supply
Integer 1-to-8 input clock divider
IF sampling frequencies to 450 MHz
Internal ADC voltage reference
Integrated ADC sample-and-hold inputs
Flexible analog input range: 1 V p-p to 2 V p-p
Differential analog inputs with 650 MHz bandwidth
ADC clock duty cycle stabilizer
95 dB channel isolation/crosstalk
Serial port control
User-configurable, built-in self-test (BIST) capability
Energy-saving power-down modes
Integrated receive features
Fast detect/threshold bits
Composite signal monitor
APPLICATIONS
Communications
Diversity radio systems
Multimode digital receivers (3G)
GSM, EDGE, WCDMA,
CDMA2000, WiMAX, TD-SCDMA
I/Q demodulation systems
Smart antenna systems
General-purpose software radios
Broadband data applications
FUNCTIONAL BLOCK DIAGRAM
SDIO/ SCLK/
AVDD DVDD FD(0:3)A DCS DFS CSB DRVDD
FD BITS/THRESHOLD
SPI
DETECT
VIN+A
VIN–A
VREF
SENSE
CML
RBIAS
VIN–B
VIN+B
SHA
REF
SELECT
ADC
PROGRAMMING DATA
SIGNAL
MONITOR
DIVIDE
1 TO 8
DUTY CYCLE
STABILIZER
DCO
GENERATION
SHA
ADC
AD9627
SIGNAL MONITOR
DATA
MULTICHIP FD BITS/THRESHOLD SIGNAL MONITOR
SYNC
DETECT
INTERFACE
D11A
D0A
CLK+
CLK–
DCOA
DCOB
D11B
D0B
AGND SYNC
FD(0:3)B
SMI SMI SMI DRGND
SDFS SCLK/ SDO/
PDWN OEB
NOTES
1. PIN NAMES ARE FOR THE CMOS PIN CONFIGURATION ONLY;
SEE FIGURE 7 FOR LVDS PIN NAMES.
Figure 1.
PRODUCT HIGHLIGHTS
1. Integrated dual, 12-bit, 80 MSPS/105 MSPS/125 MSPS/
150 MSPS ADC.
2. Fast overrange detect and signal monitor with serial output.
3. Signal monitor block with dedicated serial output mode.
4. Proprietary differential input that maintains excellent SNR
performance for input frequencies up to 450 MHz.
5. Operation from a single 1.8 V supply and a separate digital
output driver supply to accommodate 1.8 V to 3.3 V logic
families.
6. Standard serial port interface (SPI) that supports various
product features and functions, such as data formatting
(offset binary, twos complement, or gray coding), enabling
the clock DCS, power-down, test modes, and voltage
reference mode.
7. Pin compatibility with the AD9640, AD9627-11, and AD9600
for a simple migration from 12 bits to 14 bits, 11 bits, or
10 bits.
Rev. B
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