THAT Corporation offers a family of self-contained differential amplifiers preconfigured for gains of 0, ±3, and ±6dB, intended primarily for use as audio balanced line receivers. These parts offer great audio performance with decent common-mode rejection, at a price that makes them an attractive, space-saving alternative to conventional op-amps. These ICs live up to THAT’s usual high performance standards with low THD, wide bandwidth and a high slew rate. THAT line receivers are available in RoHS-compliant packages. The family features versions that are pin-compatible with similar offerings from TI and Analog Devices, but includes a -3dB version that is unique. This version offers the best tradeoff between noise and headroom for most pro audio applications.
See the Line Receiver Selector at the bottom of this page.
THAT 1200-series – InGenius® High-CMRR Balanced Line Receivers
THAT 1200-series InGenius balanced line receivers overcome 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 source impedances — a common situation in almost any pro sound environment.
THAT 1240-series – Conventional Balanced Line Receivers
The 1240-series provides high CMRR, excellent audio performance, low current requirements and a choice of gains all in a small package at a reasonable price. The THAT 1246 is pin-compatible with the TI INA137 and Analog Devices SSM2143, while the THAT 1240 is pin-compatible with the INA134 and the SSM2141.
THAT 1250-series – Low-cost Balanced Line Receivers
The THAT 1250 series is a low-cost alternative to other balanced line receiver ICs. These self-contained, small footprint parts which offer great audio performance and decent common-mode rejection. The 1250 series feature versions which are pin-compatible with the Analog Devices’ SSM2141 and SSM2143, and TI’s INA134 and INA137.
THAT 1280-series – Dual Balanced Line Receivers
The 1280-series of precision differential amplifiers offers two independent channels of the same excellent audio performance as our 1240-series. Once again, gains of 0 dB, ±3 dB, and ±6 dB are available to suit various applications requirements. The THAT 1280 is pin-compatible with the TI INA2134, and the THAT 1286 is pin-compatible with the TI INA2137 and the ADI AD8273.
THAT 1290-series – Low-cost Dual Balanced Line Receivers
The 1290-series is a low-cost alternative to our 1280-series offering two independent channels of great audio performance and decent common-mode rejection in a very small footprint package.
Balanced Line Receiver Selector
| 1200-Series | 1240-Series | 1250-Series | 1280-Series | 1290-Series | |
| InGenius High CMRR Line Receiver | Single Balanced Line Receiver | Low-Cost Balanced Line Receiver | Dual Balanced Line Receiver | Low-Cost Dual Balanced Line Receiver | |
| Features | • Transformer-like performance • Maintains CMRR under real-world conditions | • High performance • Industry-standard pinout | • Low cost • Industry-standard pinout | • Two independent channels • High performance• Industry-standard pinout | • Two independent channels • Very small footprint |
| CMRR Source impedance imbalance 0 Ω 20 Ω 200 Ω | 90 dB 90 dB 90 dB | 90 dB 59 dB 39 dB | 50 dB 47 dB 37 dB | 90 dB 59 dB 39 dB | 50 dB 47 dB 37 dB |
| Gains | 0dB -3dB -6dB | 0dB ±3dB ±6dB | 0dB ±3dB ±6dB | 0dB ±3dB ±6dB | 0dB ±3dB ±6dB |
| PSRR (60 or 100 Hz) | 80 dB | 90 dB | 90 dB | 90 dB | 90 dB |
| Max Power Supply (Vcc-Vee) | 36 Vdc | 36 Vdc | 36 Vdc | 36 Vdc | 36 Vdc |
| Supply Current | Typ: 4.7 mA | Typ: 2 mA | Typ: 2 mA | Typ: 3 mA (per channel) | Typ: 3 mA (per channel) |
| Output Noise (per channel) | -107 dBu | -106 dBu | -106 dBu | -107 dBu | -107 dBu |
| THD+N (typical conditions) | 0.0005 % | 0.0006 % | 0.0006 % | 0.0006 % | 0.0006 % |
| Package | SO-8, DIP-8 | SO-8, DIP-8 | SO-8, DIP-8 | SO-14 | QSOP-16 |
Applications | • Transformer front-end replacements• Balanced audio line receivers• Instrumentation amps• Differential amps | • Balanced audio line receivers• Instrumentation amps• Differential amps | • Balanced audio line receivers• Instrumentation amps• Differential amps | • Balanced audio line receivers• Instrumentation amps• Differential amps | • Balanced audio line receivers• Instrumentation amps• Differential amps |
| Datasheet | 1200-Series Datasheet | 1240-Series Datasheet | 1250-Series Datasheet | 1280-Series Datasheet | 1290-Series Datasheet |