Features

• High CMRR: typ. 90 dB at 60 Hz
typ. 85 at 20 kHz
• Excellent audio performance
– Wide bandwidth: > 7.6 MHz
– High slew rate: 15 V/µs
– Low distortion: 0.0006 % THD
– Low noise: -107.3 dBu
• Low current: 3 mA
• Low output offset voltage: < 1 mV
• Three gain versions: 0 dB, ± 3 dB, & ± 6 dB
• Industry-standard pinout
• Self-contained

Datasheet Download

Datasheet Download
1280-Series Datasheet (129 kB)
Dual 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 1280-series of precision differential amplifiers are designed primarily for use as audio balanced line receivers. Fabricated using THAT’s proprietary DI process, the THAT 1286 is drop-in compatible with the TI INA2137, while the THAT 1280 is pin compatible with the INA2134 and the Analog Devices AD8273.

The parts are available in models which can be configured as differential amplifiers for 0dB, +/-3dB, and +/-6dB gain. The internal precision-trimmed thin film resistors enable a wide variety of circuits that are virtually impossible to build with discrete components

Key Specifications (see 1280 Series datasheet for complete specifications)
Parameter
Symbol
Conditions
Typical
Units
Gain  
THAT 1280
THAT 1283
THAT 1286
0
± 3
± 6
dB
Common Mode Rejection Ratio
CMRR
 
60 Hz
20 kHz
90
85
dB
Input Voltage Range
Differential – equal & opposite swing
1280
1283
1286
21.5
24.4
27.5
dBu
Output Noise
BW = 20 kHz
1280
1283
1286
-104.5
-105.9
-107.3
dBu
Total Harmonic Distortion
THD
0.0006
%
Power Supply Voltage
± 3 to ± 18
V
Supply Current
2.0
mA
Supply Rejection Ratio 90 dB
Slew Rate 15 V/µs
Small Signal Bandwidth RL = 2kΩ, CL = 10pF 1280
1283
1286
7.6
9.6
11.6
MHz
Capacitive Load 300 pF
Channel Separation f = 1 kHz 120 dB
Packaging/Pricing/Samples
Model Gain Package Order Number Pricing (1000) Min Order Quantity Reference
1280 0 dB 14 pin SO 1280S14-U $2.28 55 Request Samples
14 pin SO Tape & Reel 1280S14-UR Contact us 2000
1283 -3 dB 14 pin SO 1283S14-U $2.28 55
14 pin SO Tape & Reel 1283S14-UR Contact us 2000
1286 -6 dB 14 pin SO 1286S14-U $2.28 55
14 pin SO Tape & Reel 1286S14-UR Contact us 2000
All 1280-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. ICs designated -UR are available on tape and reel for a modest increase in price and require an extended lead time. Please contact our sales department for pricing and current lead time.

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

Additional Resources

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

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

1280-series Surface Mount Adapter Board
– For our integrated circuits which are only available in surface mount packages THAT Corporation offers adapter boards which allow one of these surface-mount ICs to interface to a circuit board via traditional thru-hole mounting. These adapters make it easy for a design engineer to evaluate our surface-mount products on a prototype board without having to employ SMT technology. Adapter boards are available to qualified applicants.

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.