Features

• High CMRR: typ. 90 dB at 60 Hz typ 85 dB at 20kHz

• Excellent audio performance
– Wide bandwidth: > 8.6 MHz
– High slew rate: 12 V/µs
– Low distortion: 0.0006 % THD
– Low noise: -106 dBu
• Extremely precise internal resistor matching: typ 0.005%
• Low Current: 2 mA
• Three gain versions: 0 dB, ± 3 dB, & ± 6 dB
• Industry-standard pinout

Datasheet Download

Datasheet Download
1240-Series Datasheet (135 kB)
Balanced Line Receiver ICs

Applications

• Balanced Audio Line Receivers
• Instrumentation Amplifiers
• Differential Amplifiers
• Precision Sum and Difference Networks
• M-S Matrices
• Precision Rectifiers
• Precision gain amplifiers
• Current Shunt Monitors

Description

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 1240 Series datasheet for complete specifications)
Parameter Symbol Conditions Typical Units
Gain   THAT 1240
THAT 1243
THAT 1246
0
± 3
± 6
dB
Common Mode Rejection Ratio CMRR   60 Hz
20 kHz
90
85
dB
Input Voltage Range Differential – equal & opposite swing 1240
1243
1246
21.5
24.4
27.5
dBu
Output Noise BW = 20 kHz 1240
1243
1246
-104
-105
-106
dBu
Total Harmonic Distortion THD 0.0006 %
Power Supply Voltage ± 3 to ± 18 V
Supply Current 2.0 mA
Packaging / Pricing / Samples
Model Gain Package Order Number Pricing (1000) Min Order Quantity Reference
1240 0 dB 8 pin DIP 1240P08-U $2.01 50 Request Samples
8 pin SO 1240S08-U $1.86 98
8 pin SO Tape & Reel 1240S08-UR Contact us 2000
1243 3 dB 8 pin DIP 1243P08-U $2.01 50
8 pin SO 1243S08-U $1.86 98
8 pin SO Tape & Reel 1243S08-UR Contact us 2000
1246 6 dB 8 pin DIP 1246P08-U $2.01 50
8 pin SO 1246S08-U $1.86 98
8 pin SO Tape & Reel 1246S08-UR Contact us 2000
1240 Demo Board 1240DEMO $100.00 1  
filler All 1240-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)

Design Note 140   Input and Output Circuits for THAT Preamplifier ICs (244k)

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

1240 Series Device Model
– Our SPICE macro models allow modeling of the important parameters of our ICs.

1240 Series Demo Board
– The THAT 1240 Demonstration System (US$100) allows an engineer to test the performance of a THAT 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). See the1240 Demo Datasheetfor more information.

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.

1240 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.