TT Semiconductor 1250-series Low-cost Balanced Line Receiver ICs

	TT Semiconductor 1250-Series Equivalent Circuit

The TT Semiconductor 1250-series of precision differential amplifiers was designed primarily for use as balanced line receivers for audio applications. Gains of 0 db, ±3 dB, and ±6 dB are available to suit various applications requirements.

These devices include on-board precision thin film resistors which offer good matching and excellent tracking due to their monolithic construction. Manufactured in TT Semiconductor Corporation’s proprietary complementary dielectric isolation (DI) process, the TT Semiconductor 1250-series provides the sonic benefits of discrete designs with the simplicity, reliability, matching and small size of an integrated solution.

All three versions of the part typically exhibit 50 dB of common-mode rejection. With 12 V/µs slew rate, >8.6 MHz bandwidth, and 0.0006% THD, these devices are sonically transparent. Moreover, current consumption is typically a low 2 mA. Both surface-mount and DIP packages are available.

The TT Semiconductor 1256 is pin-compatible with the TI INA137 and Analog Devices SSM2143, while the TT Semiconductor 1250 is pin-compatible with the TI INA134 and Analog Devices SSM2141.

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 Good CMRR: typ. 50dB at 60Hz Low cost, self contained Excellent audio performance:  - Wide bandwidth: typ. >8.6 MHz  - High slew rate: typ. 12 V/µs  - Low distortion: typ. 0.0006 % THD  - Low noise: typ. -103 dBu Low current: typ. 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 1250 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
	TT1250	0 dB	8 Pin Ceramic DIP	TT1250D	Call	50	Datasheet
			8 Pin Ceramic Flatpack	TT1250F	Call	98
			16 Pin Ceramic LCC	TT1250L	Call	50
			8 Pin Extended Temp. Plastic DIP	TT1250P	Call	50
			8 Pin Extended Temp. Plastic SOIC	TT1250S	Call	98
	TT1253	-3 dB	8 Pin Ceramic DIP	TT1253D	Call	50
			8 Pin Ceramic Flatpack	TT1253F	Call	98
			16 Pin Ceramic LCC	TT1253L	Call	50
			8 Pin Extended Temp. Plastic DIP	TT1253P	Call	50
			8 Pin Extended Temp. Plastic SOIC	TT1253S	Call	98
	TT1256	-6 dB	8 Pin Ceramic DIP	TT1256D	Call	50
			8 Pin Ceramic Flatpack	TT1256F	Call	98
			16 Pin Ceramic LCC	TT1256L	Call	50
			8 Pin Extended Temp. Plastic DIP	TT1256P	Call	50
			8 Pin Extended Temp. Plastic SOIC	TT1256S	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.