MAX1213N データシートの表示（PDF） - Maxim Integrated

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MAX1213N

1.8V, Low-Power, 12-Bit, 170Msps ADC for Broadband Applications

Maxim Integrated 

1.8V, Low-Power, 12-Bit, 170Msps

ADC for Broadband Applications

Analog Inputs (INP, INN)

INP and INN are the fully differential inputs of the

MAX1213N. Differential inputs usually feature good

rejection of even-order harmonics, which allows for

enhanced AC performance as the signals are progress-

ing through the analog stages. The MAX1213N analog

inputs are self-biased at a 0.74V common-mode voltage

and allow a 1.38VP-P differential input voltage swing

(Figure 2). Both inputs are self-biased through 900Ω

resistors, resulting in a typical differential input resis-

tance of 1.8kΩ. Drive the analog inputs of the

MAX1213N in AC-coupled configuration to achieve the

best dynamic performance. See the Transformer-

Coupled, Differential Analog Input Drive section.

AVCC

INP

CP

900Ω

900Ω

INN

CP

CS IS THE SAMPLING CAPACITANCE

CP IS THE PARASITIC CAPACITANCE ˜ 1pF

INP

VCM

INN

GND

INP - INN

T/H

MAX1213N

CS

12-BIT PIPELINE

ADC

CS

FROM CLOCK-

MANAGEMENT BLOCK

TO COMMON MODE

VCM + VFS / 4

VCM - VFS / 4

+VFS / 2

GND

Figure 2. Simplified Analog Input Architecture and Allowable Input Voltage Range

-VFS / 2

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