ASNT6161-KMM


ASNT6161-KMM View full size
  • DC to 17GHz broadband operation
  • Four differential CML-type input ports and one differential CML-type output port
  • Temperature-stabilized differential gain of approximately 0dB
  • 1db compression point of 0dBm
  • DC-to-1GHz broadband channel selector port
  • Low jitter and limited temperature variation over industrial temperature range
  • Single +4.5V or -4.5V power supply
  • Power consumption: 2.1W
  • Fabricated in SiGe for high performance, yield, and reliability
  • Custom CQFP 44-pin package

Function Operating Frequency Power, mW Package
Analog Signal Selector 1-of-4 DC-17 GHz 2100 44-pin CQFP

DESCRIPTION

Fig. 1 Functional Block Diagram

The temperature stable ASNT6161-KMM analog signal selector 1-of-4 is intended for use in high-speed systems. The IC shown in Fig. 1 can deliver one of four different broad-band analog differential signals d0p/d0n, d1p/d1n, d2p/d2n, and d3p/d3n to its differential output qp/qn with a nominal gain of 0dB. The gain can be fine-tuned using the 4-pin control port gncrl0/1/2/3 with accuracy of 0.5dB as shown in Table 1.

 

Table 1. Gain Control

gncrl3

gncrl2

gncrl1

gncrl0

Gain, dB

0

0

0

0

-2.0

0

0

0

1

-1.5

0

0

1

0

-1.0

0

0

1

1

-0.5

0

1

0

0

0.5

0

1

0

1

1.0

0

1

1

0

1.5

0

1

1

1

2.0

1

X

X

X

0

The active input selection is performed through the external high-speed dual port sel1/sel2 that can be referenced to either vcc or vee depending on the state of the single-ended control signal lvlcrl. The selection logic is shown in Table 2.

 

Table 2. Channel Selection

sel1

sel2

Input connected to output

0

0

d0

0

1

d1

1

0

d2

1

1

d3

The part’s I/Os support CML-type differential interface with on-chip 50Ohm termination to vcc, and may be used differentially, AC/DC coupled, single-ended, or in any combination (see POWER SUPPLY CONFIGURATION). In the DC-coupling mode, the input signal’s common mode voltage should comply with the specifications shown in ELECTRICAL CHARACTERISTICS. In the AC-coupling mode, the input termination provides the required common mode voltage automatically. The differential DC signaling mode is recommended for optimal performance. In particular, the specified output common-mode voltage level is guaranteed only in case of external single-ended 50Ohm DC termination to vcc.

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