AD9066ARS-REEL Analog Devices Inc, AD9066ARS-REEL Datasheet - Page 6

• Manufacturer Part Number: AD9066ARS-REEL
• Description: IC ADC 6BIT DUAL 60MSPS 28-SSOP
• Manufacturer: Analog Devices Inc

Specifications of AD9066ARS-REEL

• Rohs Status: RoHS non-compliant
• Number Of Bits: 6
• Sampling Rate (per Second): 60M
• Data Interface: Parallel
• Number Of Converters: 2
• Power Dissipation (max): 600mW
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP (0.200", 5.30mm Width)

Theory of Operation
The AD9066 dual ADC employs a patented interpolated flash
architecture. This architecture enables 64 possible quantization
levels with only 32 comparator preamplifiers. This keeps input
capacitance to a minimum. The midpoint of the reference lad-
der is fed back to the analog input, allowing easy biasing of the
ADC to midscale for ac coupled applications.
As shown in Figure 4d, a simple resistor is used to provide the
reference ladder midpoint to the analog input. The high imped-
ance MOS inputs of the comparators insure no static voltage
drop across the resistor. This eliminates the need for an active
buffer (and its inherent offsets) to set the reference midpoint at
the analog input.
AD9066
(ANTENNA)
RF INPUT
+
AD607
OSCILLATOR
LOCAL
–16dBM
GENERATOR
MIDPOINT
CIRCUIT
BIAS
BIAS
330
BANDPASS
4.7 F
FILTER
AGC VOLTAGE
330
100nF
100nF
+
10
VOLTAGE
The outputs of the comparators are converted to a 6-bit word
and converted to CMOS levels. The digital signals are latched at
six stages (two pipeline delays) in the signal path. The digital
outputs are CMOS with approximately equal rise and fall times.
The encode clock utilizes a CMOS input stage with TTL-
compatible (1.4 V) thresholds. Internal clock buffers minimize
external clock drive requirements.
VMID
PTAT
10
DETECTOR
AGC
OPTIONAL
OR LPF
BPF
PLL
0
90
RECEIVED SIGNAL
STRENGTH INDICATOR
11
6
V
V
INA
AD9066
INB
CLOCK
CLKIN
1
28
27
26
25
24
23
20
19
18
17
16
15
A OUTPUTS
(INPHASE)
B OUTPUTS
(QUADRATURE)