AD9226ASTRL Analog Devices Inc, AD9226ASTRL Datasheet - Page 15

IC ADC 12BIT 65MSPS 48-LQFP

AD9226ASTRL

Manufacturer Part Number
AD9226ASTRL
Description
IC ADC 12BIT 65MSPS 48-LQFP
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD9226ASTRL

Rohs Status
RoHS non-compliant
Number Of Bits
12
Sampling Rate (per Second)
65M
Data Interface
Parallel
Number Of Converters
3
Power Dissipation (max)
475mW
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
48-LQFP
For Use With
AD9226-EB - BOARD EVAL FOR AD9226-SSOP

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD9226ASTRL
Manufacturer:
Analog Devices Inc
Quantity:
10 000
2.5V
1.25V
0.75V
1.5V
1.25V
0.75V
2.5V
1.5V
1.5V
0.5V
3.0V
1.0V
10 F
10 F
49.9
49.9
33
10 F
33
10 F
33
33
33
33
0.1 F
0.1 F
15pF
1V
15pF
33
2V
15pF
15pF
0.1 F
0.1 F
33
1V
2V
VINA
VINB
REFCOM
REFCOM
VREF
SENSE
VINA
VINB
VREF
SENSE
AD9226
VINA
VINB
VREF
SENSE
AD9226
VINA
VINB
VREF
SENSE
AD9226
AD9226
CAPB
CAPB
CAPT
CAPT
CAPB
CAPT
CAPB
CAPT
0.1 F
0.1 F
0.1 F
0.1 F
0.1 F
0.1 F
0.1 F
0.1 F
10 F
0.1 F
10 F
0.1 F
10 F
0.1 F
10 F
0.1 F
The differential input characterization for this data sheet was
performed using the configuration shown in Figure 7.
Since not all applications have a signal preconditioned for
differential operation, there is often a need to perform a single-
ended-to-differential conversion. In systems that do not need to
be dc-coupled, an RF transformer with a center tap is the best
method to generate differential inputs for the AD9226. It pro-
vides all the benefits of operating the ADC in the differential
mode without contributing additional noise or distortion. An RF
transformer also has the added benefit of providing electrical
isolation between the signal source and the ADC. An improvement
in THD and SFDR performance can be realized by operating
the AD9226 in the differential mode. The performance enhance-
ment between the differential and single-ended mode is most
noteworthy as the input frequency approaches and goes beyond
the Nyquist frequency (i.e., f
The circuit shown in Figure 6a is an ideal method of applying
a differential dc drive to the AD9226. It uses an AD8138 to
derive a differential signal from a single-ended one. Figure 6b
illustrates its performance.
Figure 7 presents the schematic of the suggested transformer
circuit. The circuit uses a Minicircuits RF transformer, model
T1-1T, which has an impedance ratio of four (turns ratio of 2).
The schematic assumes that the signal source has a 50 Ω source
impedance. The center tap of the transformer provides a con-
venient means of level-shifting the input signal to a desired
common-mode voltage. In Figure 7 the transformer centertap
is connected to a resistor divider at the midsupply voltage.
2.75V
2.25V
3.0V
2.5V
2.0V
2.5V
2.75V
3.0V
2.5V
2.0V
2.5V
2.0V
49.9
49.9
33
33
10 F
33
33
10 F
10k
2.5V
0.1 F
10k
0.1 F
15pF
0.1 F
15pF
0.1 F
2V
1V
2.5V
IN
AVDD
> F
CMLEVEL
VINA
VINB
VREF
SENSE
VINA
VINB
VREF
SENSE
S
AD9226
/2).
(LQFP)
AD9226
CAPB
CAPT
CAPB
CAPT
AD9226
0.1 F
0.1 F
0.1 F
0.1 F
10 F
0.1 F
10 F
0.1 F

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