TT Semiconductor 1240-series Balanced Line Receiver ICs

	TT Semiconductor 1240-Series equivalent circuit

TT Semiconductor 1240-Series equivalent circuit The TT Semiconductor 1240-series of precision differential amplifiers are designed primarily for use as audio balanced line receivers. Gains of 0 db, ±3 dB, and ±6 dB are available to suit various applications requirements.

The TT Semiconductor 1246 is drop-in compatible with the TI INA137 and Analog Devices SSM2143, while the TT Semiconductor 1240 is pin compatible with the INA134 and the SSM2141. The devices are protected from EOS/ESD by diode clamps on critical pins making them reliable alternatives for real-world products.

All devices exhibit 90 dB of typical common-mode rejection, slew rates of 12 V/us, and 0.0006% THD. The 124x series features wide bandwidth, typically >8.6 MHz. Both surface-mount and DIP packages are available.

The TT Semiconductor 124x family are laser-trimmed to obtain the precision resistor matching needed for high CMR performance. Manufactured in TT Semiconductor Corporation's proprietary dielectric isolation (DI) process, the TT Semiconductor 124x series provides the sonic benefit of discrete designs, with the compact size, reliability, matching, and thermal tracking of a fully integrated solution.

For a side by side comparison of our input stage ICs see our Line Receiver Selection Guide.		For a cross-reference to other manufacturers' part numbers see our IC Cross-Reference Chart
Features High CMRR: typ. 90 dB at 60 Hz Excellent audio performance    Wide bandwidth: > 8.6 MHz    High slew rate: 12 V/µs    Low distortion: 0.0006 % THD    Low noise:  -104 dBu Low Current: 2 mA Several gains: 0 dB, ± 3 dB, & ± 6 dB Industry-standard pinout		Applications Balanced Audio Line Receivers Instrumentation Amplifiers Differential Amplifiers Precision Summers Current Shunt Monitors

For complete specifications, download a copy of the 1240 Series Datasheet. Datasheets are provided in Adobe's PDF format. You need to have Adobe Acrobat Reader installed on your computer to view the file. To obtain a free copy of Acrobat Reader follow the link at right.

	Model	Gain	Package	Order Number	Pricing (1000)	Min Order Quantity	Reference
	TT1240	0 dB	8 Pin Ceramic DIP	TT1240D	Call	50	Datasheet
			8 Pin Ceramic Flatpack	TT1240F	Call	98
			16 Pin Ceramic LCC	TT1240L	Call	50
			8 Pin Extended Temp. Plastic DIP	TT1240P	Call	50
			8 Pin Extended Temp. Plastic SOIC	TT1240S	Call	98
	TT1243	-3 dB	8 Pin Ceramic DIP	TT1243D	Call	50
			8 Pin Ceramic Flatpack	TT1243F	Call	98
			16 Pin Ceramic LCC	TT1243L	Call	50
			8 Pin Extended Temp. Plastic DIP	TT1243P	Call	50
			8 Pin Extended Temp. Plastic SOIC	TT1243S	Call	98
	TT1246	-6 dB	8 Pin Ceramic DIP	TT1246D	Call	50
			8 Pin Ceramic Flatpack	TT1246F	Call	98
			16 Pin Ceramic LCC	TT1246L	Call	50
			8 Pin Extended Temp. Plastic DIP	TT1246P	Call	50
			8 Pin Extended Temp. Plastic SOIC	TT1246S	Call	98

All models are available on tape and reel for a modest increase in price and require an extended lead time. Tape and reel parts have a 2000 piece minimum and must be ordered in multiples of 2000. Please contact our sales department for pricing and delivery.

The TT Semiconductor 1240 Series Demonstration System allows an engineer to test the performance of a TT Semiconductor 1240 series IC quickly and easily. The 1240 Demo Board is self-contained circuit board with XLR connectors for signal input and output and a 3-pin header for connection to an external regulated DC power supply (not included).