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
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
| 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 | |
| Model | Gain | Package | Order Number | Pricing (1000) | Min Order Quantity | Reference |
| 1280 | 0 dB | 14 pin SO | 1280S14-U | $2.75 | 55 | Request Samples |
| 14 pin SO Tape & Reel | 1280S14-UR | Contact us | 2000 | |||
| 1283 | -3 dB | 14 pin SO | 1283S14-U | $2.75 | 55 | |
| 14 pin SO Tape & Reel | 1283S14-UR | Contact us | 2000 | |||
| 1286 | -6 dB | 14 pin SO | 1286S14-U | $2.75 | 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)
| 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.