Advanced Science And Novel Technology Company, Inc.
2790 Skypark Drive Suite 112, Torrance, CA 90505

Offices: 310-530-9400 / Fax: 310-530-9402
www.adsantec.com

ASNT6112-KMM
DC-25GHz 1-to-4 Analog Signal Splitter

Single +3.3V or -3.3V power supplyPower consumption: 1.35W

Fabricated in SiGe for high performance, yield, and reliability

Custom CQFP 44-pin package

ncvcc

Low jitter and limited temperature variation over industrial temperature rangevcc

nc

Differential gain of approximately -1.5dBvcc

q1n

Differential input linearity range up to 500mV p-p

vcc

q1p

One differential CML-type input port and four phase-matched differential CML-type output ports

vcc

vee

DC to 25GHz broadband linear signal splitter

vcc

vcc
vee
vcc
vee

vcc
q2p

vcc

vcc

dp

q2n

ASNT6112

vcc

vcc

dn

q3p

vcc

vcc

vee

q3n

vcc

vcc
nc

Rev. 2.5.21vcc

nc

vcc

q4p

vcc

q4n

vcc

vee

vcc

vee

vcc

vcc

November 2020

Advanced Science And Novel Technology Company, Inc.
2790 Skypark Drive Suite 112, Torrance, CA 90505

Offices: 310-530-9400 / Fax: 310-530-9402
www.adsantec.com

DESCRIPTION
q1p q1n50505050

q2pq2n50dpdn505050

q3pq3n5050

q4p q4nFig. 1. Functional Block Diagram

The temperature stable ASNT6112-KMM 1-to-4 analog signal splitter is intended for use in high-speed
interleaved ADCs or similar systems. The IC shown in Fig. 1 can receive a broad-band analog signal at its
differential input dp/dn and effectively distribute it to four separate phase-matched differential outputs
q1p/q1n, q2p/q2n, q3p/q3n, q4p/q4n with a nominal gain of 0dB.
The part’s I/O’s support the CML logic interface with on chip 50Ohm termination to vcc and may be useddifferentially, AC/DC coupled, single-ended, or in any combination (also see POWER SUPPLYCONFIGURATION). 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, theinput termination provides the required common mode voltage automatically. The differential DC
signaling mode is recommended for optimal performance. In particular, the specified output commonmode voltage level is guaranteed only in case of external single-ended 50Ohm DC termination to vcc.

POWER SUPPLY CONFIGURATION
The part can operate with either negative supply (vcc = 0.0V = ground and vee = −3.3V), or positivesupply (vcc = +3.3V and vee = 0.0V = ground). In case of the positive supply, all I/Os need AC
termination when connected to any devices with 50Ohm termination to ground. In any case, the input
common mode voltage level is shifted down from vcc by a certain voltage of ΔVICM as specified in
ELECTRICAL CHARACTERISTICS. To have the input common mode voltage equal to ground, afloating negative supply scheme detailed in Fig. 2 should be used.
Rev. 2.5.2

2

November 2020

Advanced Science And Novel Technology Company, Inc.
2790 Skypark Drive Suite 112, Torrance, CA 90505

Offices: 310-530-9400 / Fax: 310-530-9402
www.adsantec.com

PCU1
ΔVICM

PCU2vcc

GND
Value specified
in Electrical
Characteristics

PCU1
- G +

PCU2
- G +

GND vcc

veea.

veeb.

Fig. 2. Floating Negative Supply Scheme: Potential Diagram (a) and Schematic (b)For the best performance, the external 50Ohm terminations for the outputs should be connected to vcc,
but not to ground!
Different PCB layouts will be needed for each different power supply combination.

All the characteristics detailed below assume vcc = 0.0V and vee = -3.3V.

ABSOLUTE MAXIMUM RATINGS
Caution: Exceeding the absolute maximum ratings shown in Table 1 may cause damage to this productand/or lead to reduced reliability. Functional performance is specified over the recommended operating
conditions for power supply and temperature only. AC and DC device characteristics at or beyond theabsolute maximum ratings are not assumed or implied. All min and max voltage limits are referenced toground.
Table 1. Absolute Maximum Ratings

Parameter
Supply Voltage (vee)Power Consumption
RF Input Voltage Swing (SE)
Case Temperature
Storage Temperature
Operational Humidity
Storage Humidity

Rev. 2.5.2

Min-4010103

Max-3.6
1.49
1.4
+90
+1009898UnitsVWVºCºC%%

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Advanced Science And Novel Technology Company, Inc.
2790 Skypark Drive Suite 112, Torrance, CA 90505

Offices: 310-530-9400 / Fax: 310-530-9402
www.adsantec.com

TERMINAL FUNCTIONSTERMINAL
Name
No.
Typedpdnq1pq1nq2pq2nq3pq3nq4pq4n
Namevccveen/cDESCRIPTION

High-Speed I/Os
39
CML Differential high speed data inputs with internal SE 50Ohm
input termination to vcc
4130
CML Differential high speed data outputs with internal SE 50Ohm
output termination to vcc. Require external SE 50Ohm termination to vcc
2821
CMLoutput
19
17CMLoutput
158CML
output6
Supply and Termination Voltages
Description
Pin Number
Positive power supply (+3.3V or 0)
1, 3, 5, 7, 9, 11, 12, 14, 16, 18, 20, 22, 23,25, 27, 29, 31, 33, 34, 36, 38, 40, 42, 44
Negative power supply (0V or -3.3V)
2, 4, 32, 35, 37, 43
Not connected pins

10, 13, 24, 26

ELECTRICAL CHARACTERISTICSPARAMETERMIN
TYP MAXUNIT
COMMENTS
General Parameters
-3.1
-3.3
-3.5
V±6%
vee
0.0
V
External ground
vcc
Ivee
410mA
Power consumption
1350mW
Junction temperature-2550
125°C
Input Analog (dp/dn)
BandwidthDC25GHz-3dB
Common mode levelvcc-0.6 vcc-0.5 vcc-0.4
mV
Input Noise Density
1.5nV/sqrt(Hz)S11-10dB
DC to 30GHz
Output Analog (q1p/q1n, q2p/q2n, q3p/q3n, q4p/q4n)
Common mode levelvcc-0.55
VWith external 50Ohm
DC termination
S22-8dB
DC to 30GHz
Small Signal Differential Gain
-2-1
dB
at 10GHz
Output referred 1dB
2.7dBmSingle-Ended, 20GHz
Compression Point
THD-45dBc
at 10GHz
Rev. 2.5.24November 2020

Advanced Science And Novel Technology Company, Inc.
2790 Skypark Drive Suite 112, Torrance, CA 90505

Offices: 310-530-9400 / Fax: 310-530-9402
www.adsantec.com

PACKAGE INFORMATIONThe chip die is housed in a custom 44-pin CQFP package shown in Fig. 3. The package provides a center
heat slug located on its back side to be used for heat dissipation. ADSANTEC recommends for thissection to be soldered to the vcc plain, which is ground for a negative supply, or power for a positivesupply.
The part’s identification label is ASNT6112-KMM. The first 8 characters of the name before the dashidentify the bare die including general circuit family, fabrication technology, specific circuit type, and partversion while the 3 characters after the dash represent the package’s manufacturer, type, and pin outcount.

Fig. 3. CQFP 44-Pin Package Drawing (All Dimensions in mm)

Rev. 2.5.2

5November 2020

Advanced Science And Novel Technology Company, Inc.
2790 Skypark Drive Suite 112, Torrance, CA 90505

Offices: 310-530-9400 / Fax: 310-530-9402
www.adsantec.com

This device complies with Commission Delegated Directive (EU) 2015/863 of 4 June 2015 amending
Annex II to Directive 2011/65/EU of the European Parliament and of the Council as regards the list ofrestricted substances (Text with EEA relevance) on the restriction of the use of certain hazardous
substances in electrical and electronics equipment (RoHS Directive) in accordance with the definitions set
forth in the directives for all ten substances.

REVISION HISTORY
Revision
2.5.2
2.4.2
2.3.2
2.3.1

Date
11-2020
05-2020
07-2019
05-2015

2.2.1

08-2014

2.1.1

03-20132.003-2012

1.3
1.2
1.001-2012
11-201107-2011

Rev. 2.5.2Changes
Corrected linearity range
Updated Package Information
Updated Letterhead
Revised Package Information section
Updated format
Corrected Power Supply Configuration section
Corrected gain values
Corrected THD value
Corrected functional block diagram
Corrected description
Corrected absolute maximum ratings table
Corrected terminal functions table
Corrected electrical characteristics table
Updated package information
Updated block diagram
Revised description
Updated electrical characteristics table
Added mechanical drawing and packaging information
Corrected terminal functions table
Initial release

6November 2020