Rainbow-electronics MAX1002 Manual de usuario descargar pdf (Pagina 7)

Figures 4 and 5 show single-ended and differential DC-

coupled input circuits for applications where a DC com-

ponent of the input signal is present. The amplifiers’

input common-mode voltage range extends from 1.75V

to 2.75V. To prevent attenuation of the input signal’s DC

component when operating in this mode, disable the off-

set-correction amplifier by grounding the _OCC+ and

_OCC- pins for the I and Q blocks (Figures 4 and 5).

ADCs

The I and Q ADC blocks receive the analog signals

from the respective I and Q input amplifiers. The ADCs

use flash conversion with 63 fully differential compara-

tors to digitize the analog input signal into a 6-bit output

in offset binary format.

MAX1002

Low-Power, 60Msps, Dual, 6-Bit ADC

_______________________________________________________________________________________ 7

Figure 2. Single-Ended AC-Coupled Input

Figure 3. Differential AC-Coupled Input

Figure 4. Single-Ended DC-Coupled Input

Figure 5. Differential DC-Coupled Input

MAX1002

INPUT

AMP

20k

2.35V INTERNAL REFERENCE

20k

_IN+

_OCC+ _OCC-

_IN-

0.1µF

0.22µF

SOURCE

0.1µF

OFFSET

CORREC-

TION

(ONE CHANNEL SHOWN)

MAX1002

INPUT

AMP

20k

2.35V INTERNAL REFERENCE

(ONE CHANNEL SHOWN)

20k

_IN+

_OCC+ _OCC-

_IN-

0.1µF

SOURCE

OFFSET

CORREC-

TION

0.22µF

MAX1002

INPUT

AMP

20k

2.35V INTERNAL REFERENCE

20k

_IIN+

_IOCC+ _IOCC-

_IIN-

OFFSET-CORRECTION DISABLED

SOURCE

1.75V TO 2.75V

(ONE CHANNEL SHOWN)

OFFSET

CORREC-

TION

MAX1002

INPUT

AMP

20k

2.35V INTERNAL REFERENCE

20k

_IIN+

_IOCC+ _IOCC-

_IIN-

OFFSET-CORRECTION DISABLED

SOURCE

DIFFERENTIAL SOURCE

WITH 1.75V TO 2.75V

COMMON-MODE

RANGE

(ONE CHANNEL SHOWN)

OFFSET

CORREC-

TION

1 2 3 4 5 6 7 8 9 10 11 12

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Rainbow-electronics MAX1002 Manual de usuario Pagina 7

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