• Extremely high common-mode input impedance
• Maintains Common Mode Rejection (CMR) under real-world conditions
• Transformer-like performance in an IC
• High CMRR:
— typ. 90 dB at 60 Hz
— typ. 85dB @ 20 kHz
• Excellent audio performance
— Wide bandwidth: > 22 MHz
— High slew rate: 12 V/us
— Low distortion: 0.0005 % THD
— Low noise: -106 dBu
• Three gain versions: 0 dB, -3 dB, & -6 dB

Datasheet Download

Datasheet Download
1200-Series Datasheet (326 kB PDF)
InGenius® High-CMRR Balanced Line Receiver ICs


• Balanced Audio Line Receivers
• Instrumentation Amplifiers
• Differential Amplifiers
• Transformer Front-End Replacements
• ADC Front-Ends


The THAT 1200-series InGenius® high-common mode rejection balanced line receiver IC overcomes a serious limitation of conventional balanced input stages: poor common mode rejection in real-world applications. While conventional input stages measure well in the lab and perform well on paper, they fail to live up to their CMRR specs when fed from even slightly unbalanced line impedances — a common situation in almost any pro audio environment.

Key Specifications(see 1200 Series datasheetfor complete specifications)
Parameter Symbol Conditions Typical Units
Common Mode Rejection Ratio CMRR Up to 10 Ω mismatch in line impedance
VCM= ± 10 V
60 Hz
20 kHz
600 Ω mismatch in line impedance 60 Hz
20 kHz
Input Voltage Range Differential – equal & opposite swing 1200
Output Noise BW = 20 kHz 1200
Total Harmonic Distortion THD 0.0005 %
Power Supply Voltage ± 3 to ± 20 V
Supply Current 4.7 mA
Model Gain Package Order Number Pricing (1000) Min Order Quantity Reference
1200 0 dB 8 pin DIP 1200P08-U $4.88 50 Request Samples
8 pin SO 1200S08-U $3.99 98
8 pin SO Tape & Reel 1200S08-UR Contact us 2000
1203 -3 dB 8 pin DIP 1203P08-U $4.88 50
8 pin SO 1203S08-U $3.99 98
8 pin SO Tape & Reel 1203S08-UR Contact us 2000
1206 -6 dB 8 pin DIP 1206P08-U $4.88 50
8 pin SO 1206S08-U $3.99 98
8 pin SO Tape & Reel 1206S08-UR Contact us 2000
1200 Demo 1200 Series Demo Datasheet 1200DEMO $100.00 1
All 1200-Series parts are RoHS compliant. Minimum order quantity (MOQ) is one tube or one reel. Parts must be ordered in multiples of the MOQ. Samples are available to qualified applicants. Pricing is subject to change.

Design Notes (as PDF files)

Design Note 133   Achieving Optimum CMRR with Differential Input A/D Converters (53k)

Related Products
Other Balanced Line Receivers
THAT 1240 Series Single Channel Balanced Line Receivers 1240 Series Datasheet
THAT 1250 Series Low-Cost Single Channel Balanced Line Receivers 1250 Series Datasheet
THAT 1280 Series Dual Channel Balanced Line Receivers 1280 Series Datasheet
THAT 1290 Series Low-Cost Dual Channel Balanced Line Receivers 1290 Series Datasheet
Balanced Line Drivers
THAT 1606/1646 OutSmarts® Balanced Line Driver 1606/1646 Datasheet

1200 Series Device Model
– Our SPICE macro models allow modeling of the important parameters of our ICs.

1200 Series Demo Board
– The THAT 1200 Demonstration System (US$100) allows an engineer to test the performance of a THAT 1200 series IC quickly and easily. The 1200 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). See the1200 Demo Datasheetfor more information.

1200 Series Material Data Declaration Sheet
Material Data Declaration Sheets (MDDS) disclose the hazardous materials in our integrated circuits as required by the European RoHS directive.

Part Number Cross Reference
– A chart of THAT part numbers cross-referenced to other IC manufacturers.

Line Receiver Selector
– A side by side comparison of the features and specifications of our input stage ICs.

Harsh Environment Packaging
– TT Semiconductor repackages THAT Corporation’s IC products in ruggidized plastic for the medical, aerospace, defense, and heavy industrial marketplaces.