that1286 THAT Corporation, that1286 Datasheet

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that1286

Manufacturer Part Number
that1286
Description
Dual Balanced Line Receiver Ics
Manufacturer
THAT Corporation
Datasheet
• High CMRR: typ. 90 dB at 60Hz
• Self-contained
• Excellent audio performance
• Low current: typ. 3 mA (per amplifier)
• Several gains: 0 dB, ±3 dB, ±6 dB
• Industry Standard Pinout
tial amplifiers was designed primarily for use as
balanced line receivers for audio applications.
Gains of 0 dB, ±3 dB, and ±6 dB are available to
suit various applications requirements.
form to obtain the precision resistor matching
needed for high CMR performance and precise
gain.
proprietary complementary dielectric isolation
(DI) process, the 1280 series provides the sonic
benefits of discrete designs with the simplicity,
– Wide bandwidth: typ. >7.6 MHz
– High slew rate: typ. 15 V/μs
– Low distortion: typ. 0.0006% THD
– Low noise: typ. -104.5 dBu
The THAT 1280 series of precision differen-
These devices are laser-trimmed in wafer
Manufactured
THAT1280
THAT1283
THAT1286
14
1
Ref A
Part No.
NC
R
R
3
4
FEATURES
13
Out A
2
In- A
R
R
Figure 1. Equivalent circuit
2
1
Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com
12
THAT Corporation; 45 Sumner Street; Milford, MA 01757-1656; USA
Sns A
3
In+ A
Copyright © 2007, THAT Corporation
-3 dB
-6 dB
Gain
0 dB
in
THAT
11
4
Vcc
Vee
R
10
Corporation’s
Sns B
1
5
In+ B
R
R
& R
1
2
3
9
6
Out B
R
R
In- B
Description
4
3
R
2
Ref B
8
7
& R
NC
4
reliability, matching, and small size of a fully
integrated solution.
90 dB of common-mode rejection. With 15 V/μs
slew rate, 7.6 MHz or higher bandwidth, and
0.0006% THD, these devices are sonically trans-
parent.
typically a low 6 mA (3 mA per amplifier).
package. The 1280 is pin-compatible with the TI
INA2134, and the 1286 is pin-compatible with
the TI INA2137 and the ADI AD8273.
• Balanced Audio Line Receivers
• Instrumentation Amplifiers
• Differential Amplifiers
• Precision Summers
• Current Shunt Monitors
Document 600114 Rev 01
All three versions of the part typically exhibit
The 1280 series is available in a 14-pin SOIC
Moreover,
APPLICATIONS
THAT 1280, 1283, 1286
Pin Name
SENSE B
SENSE A
REF B
OUT B
OUT A
REF A
IN+ A
IN+ B
IN- A
IN- B
N/C
N/C
current
V
V
Table 1. Pin assignments
EE
CC
Line Receiver ICs
Dual Balanced
consumption
Pin Number
10
11
12
13
14
1
2
3
4
5
6
7
8
9
is

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that1286 Summary of contents

Page 1

... Part No. Gain R THAT1280 0 dB THAT1283 -3 dB THAT1286 -6 dB Figure 1. Equivalent circuit THAT Corporation; 45 Sumner Street; Milford, MA 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com Copyright © 2007, THAT Corporation • Balanced Audio Line Receivers • Instrumentation Amplifiers • ...

Page 2

... While specific resistor ratios are very closely trimmed, absolute resistance values can vary ±25% from the typical values show n. Input impedance is monitored by lot sampling. 6. Defined with respect to differential gain. 7. Parameter guaranteed over the entire range of power supply and temperature. THAT Corporation; 45 Sumner Street; Milford, MA 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com Page SPECIFICATIONS ...

Page 3

... IN(DIFF) ½v IN(DIFF IN(CM) Figure 2. Simplified test circuit (1/2 of 128x shown) THAT Corporation; 45 Sumner Street; Milford, MA 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com Page Conditions R = 2kΩ 1280 (0dB gain) 1283 (-3dB gain) ...

Page 4

... Figure 3. Representative input protection circuit THAT Corporation; 45 Sumner Street; Milford, MA 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com Page Theory of Operation A further consideration is that after trimming, the two resistor divider ratios are tightly controlled, but the actual value of any individual resistor is not ...

Page 5

... So, we must consider the inputs of the opamp. For common-mode signals (V ), the common-mode IN(CM) input current splits to flow through both R THAT Corporation; 45 Sumner Street; Milford, MA 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com Page Because v ...

Page 6

... With ±15 V supply rails, the maximum output signal swing is ~+21.1 dBu; here the maximum gain. In THAT Corporation; 45 Sumner Street; Milford, MA 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com Page each case, a 1283 configured for -3 dB gain is the ideal choice ...

Page 7

... In+ Ref Figure line receiver THAT Corporation; 45 Sumner Street; Milford, MA 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com Page Applications Instrumentation Amplifier Application Figure 11 shows one half of a 1280 configured as an instrumentation amplifier. The two opamps ...

Page 8

... U2B V OP-270 EE Figure 11. Instrumentation amplifier THAT Corporation; 45 Sumner Street; Milford, MA 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com Page this signal down by 18.8 dB while attenuating the noise of the line receivers as well. In ADC applications such as this, noise is This usually a significant consideration ...

Page 9

... In+ 10n V- U1B 8 4 1283 V EE Control Voltage 2 6.2mV/dB Figure 13. Voltage-controlled gain control of a balanced signal THAT Corporation; 45 Sumner Street; Milford, MA 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com Page -18 In- Sense 13 R1 Vout 909R ...

Page 10

... H 0.41/1.27 0.016/0.05 Figure 14. SO package outline drawing THAT Corporation; 45 Sumner Street; Milford, MA 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com Page Package Information Neither the lead-frame nor the the plastic mold compound used in the 1280-series contains any ...

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