Features
• Good CMRR: typ. 50dB at 60Hz & 20kHz
• Excellent audio performance
– Wide bandwidth: > 8.6 MHz
– High slew rate: 12 V/µs
– Low distortion: 0.0006 % THD
– Low noise: -106 dBu
• Precise internal resistor matching: typ 0.5%
• Low Current: 2 mA
• Three gain versions: 0 dB, ± 3 dB, & ± 6 dB
• Industry-standard pinout
• Low cost
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 low-cost THAT 1250-series of precision differential amplifiers are designed primarily for use as audio balanced line receivers. Fabricated using THAT’s proprietary DI process, the THAT 1256 is pin compatible with the THAT 1246. the Texas Instruments INA137, and Analog Devices SSM2143, while the THAT 1250 is pin compatible with the 1246, INA134, and SSM2141. The THAT 1253 is pin-compatible with the 1243. The parts are available in models which can be configured as differential amplifiers for 0dB, +/-3dB, and +/-6dB gain.
The 1250-series achieves its low cost by eliminating laser trimming compared to its pin-compatible relations. As a result, the 1250-seriues offers less common mode rejection and precision in its resistor ratios compared to the 1240-series (and equivalents from other manufacturers).
| Parameter | Symbol | Conditions | Typical | Units | |
| Gain | THAT 1250 THAT 1253 THAT 1256 |
0 ± 3 ± 6 |
dB | ||
| Common Mode Rejection Ratio |
CMRR
|
|
50 |
dB
|
|
| Input Voltage Range | — |
Differential – equal & opposite swing
|
1250 1253 1256 |
21.5
24.4 27.5 |
dBu |
| Output Noise | — | BW = 20 kHz | 1250 1253 1256 |
-103 -105 -106 |
dBu |
| Total Harmonic Distortion |
THD
|
— | 0.0006 |
%
|
|
| Power Supply Voltage |
—
|
— | ± 3 to ± 18 | V | |
| Supply Current | — | — |
2.0
|
mA
|
|
| Supply Rejection Ratio | — | — | 90 | dB | |
| Small Signal Bandwidth | — | RL = 2kΩ, CL = 10pF | 1250 1253 1256 |
8.6 12.2 18 |
MHz |
| Capacitive Load | — | — | 200 (Max.) | pF | |
| Model | Gain | Package | Order Number | Pricing (1000) | Min Order Quantity | Reference |
| 1250 | 0 dB | 8 pin DIP | 1250P08-U | $0.95 | 50 | Request Samples |
| 8 pin SO | 1250S08-U | $0.69 | 98 | |||
| 8 pin SO Tape & Reel | 1250S08-UR | Contact us | 2000 | |||
| 1253 | -3 dB | 8 pin DIP | 1253P08-U | $0.95 | 50 | |
| 8 pin SO | 1253S08-U | $0.69 | 98 | |||
| 8 pin SO Tape & Reel | 1253S08-UR | Contact us | 2000 | |||
| 1256 | -6 dB | 8 pin DIP | 1256P08-U | $0.95 | 50 | |
| 8 pin SO | 1256S08-U | $0.69 | 98 | |||
| 8 pin SO Tape & Reel | 1256S08-UR | Contact us | 2000 | |||
| All 1250-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. |
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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)
| 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.
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.