THAT Corporation THAT1246, THAT1240, THAT1243 Datasheet

THAT Corporation

Balanced Line Receiver ICs

THAT 1240, 1243, 1246

FEATURES

High CMRR: typically 90dB at 60Hz

·

Wide bandwidth and high slew rate

·

Low distortion and low noise

·

Available in 0 dB, -3 dB, and -6 dB

·

versions

Pin compatible with SSM2143 and

·

INA137

Description

The THAT 124x series of precision differential
amplifiers are designed primarily for use as audio
balanced line receivers. Gains of 0 db, -3 dB, and

-6 dB are available to suit various applications re­quirements.

The THAT 1246 is drop-in compatible with
the Burr-Brown INA137 and Analog Devices
SSM2143, while the THAT 1240 is drop-in com­patible with the SSM2140.

All devices exhibit 90 dB of typical com­mon-mode rejection, slew rates of 12 V/ms, a

APPLICATIONS

Balanced Audio Line Receivers

·

Summing Amplifiers

·

Differential Amplifiers

·

Current Shunt Monitors

·

Ground Loop Eliminator

·

20MHz bandwidth, and 0.0006% THD. Both sur
face-mount and DIP packages are available.

The THAT 124x family are laser-trimmed to
obtain the precision resistor matching needed for
high CMR performance. Fashioned in THAT Cor­poration's proprietary dielectric isolation (DI)
process, the THAT 124x series provides the sonic
benefit of discrete designs, with the compact size,
reliability, matching, and thermal tracking of a
fully integrated solution.

-

Vcc

In-

In+

Vee

Figure 1. THAT1240-series equivalent circuit diagram

THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA

Tel: [phone]; Fax: [phone]; Web: www.thatcorp.com

NC

Sense

Vout

Ref

Pin Name DIP Pin SO Pin

Ref 1 1

In- 2 2

In+ 3 3

Vee 4 4

Sense 5 5

Vout 6 6

Vcc 7 7

NC 8 8

Table 1. 1240 Series pin assignments

Gain Plastic DIP Plastic SO

0 dB 1240P 1240S

-3 dB 1243P 1243S

-6 dB 1246P 1246S

Table 2. Ordering information

Page 2 Balanced Line Receiver ICs

Preliminary Information

SPECIFICATIONS

1

Absolute Maximum Ratings (TA= 25°C)

Positive Supply Voltage (VCC) +18 V Power Dissipation (PD)(TA= 75°C) TBD mW

Negative Supply Voltage (V

Storage Temperature Range (T

Output Short-Circuit Duration (t

) -18 V Operating Temperature Range (TOP) 0 to +70°C

EE

) -40 to +125°C Junction Temperature (TJ) 150°C

ST

) Continuous Lead Temperature (Soldering 60 seconds) TBD °C

SH

Positive Input Voltage (Ref, Sense) +18 V Negative Input Voltage (Ref, Sense) -18 V

THAT1240 THAT1243 THAT1246

Positive Input Voltage (In+,In-) Vcc x 2 Vcc x 2.4 Vcc x 3

Negative Input Voltage (In+, In-) Vee x 2 Vee x 2.4 Vee x 3

Recommended Operating Conditions

Parameter Symbol Conditions Min Typ Max Units

Positive Supply Voltage V

Negative Supply Voltage V

CC

EE

+2.2 +18 V

-2.2 -18 V

Electrical Characteristics

2

Parameter Symbol Conditions Min Typ Max Units

Supply Current I

Input Voltage Range V

CC

IN-DIFF

Differential (equal and opposite swing)

No signal — 2.1 3.4 mA

THAT1240 (0 dB gain) — 21.5 — dBu
THAT1243 (-3 dB gain) — 24.5 — dBu
THAT1246 (-6 dB gain) — 27.5 — dBu

V

IN-CM

Common mode

THAT1240 (0 dB gain) — 27.5 — dBu
THAT1243 (-3 dB gain) — 29.1 — dBu
THAT1246 (-6 dB gain) — 31.0 — dBu

Input Impedance

4

Z

Z

IN-DIFF

IN-CM

Common mode (all versions) — 9 — kW

Differential
THAT1240 — 18 — kW
THAT1243 — 21 — kW
THAT1246 — 24 — kW

Common Mode Rejection CMR Matched source impedances; VCM= ±10V

DC 70 90 — dB

60 Hz 70 90 — dB
20 kHz — 85 — dB
44 kHz — 60 — dB

Power Supply Rejection

5

PSR At 60 Hz, with VCC=-V

EE

THAT1240 — 82 — dB
THAT1243 — 80 — dB

3

1. All specifications are subject to change without notice.

2. Unless otherwise noted, T

3. 0 dBu = 0.775Vrms.

4. See test circuit in Figure 2.

5. Defined with respect to differential gain.

=25°C, VCC= +15V, VEE= -15V, Gain=-6dB

A

THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA

Tel: [phone]; Fax: [phone]; Web: www.thatcorp.com

Rev. 04/29/02 Page 3
Preliminary Information

Electrical Characteristics (Cont’d)

Parameter Symbol Conditions Min Typ Max Units

Total Harmonic Distortion THD V

=10dBV;BW=20kHz;f=1kHz

IN-DIFF

R

=2kW — 0.0006 — %

L

Output Noise e

n(OUT)

BW=20kHz

THAT1240 — -106 — dBu
THAT1243 — -107 — dBu
THAT1246 — -109 — dBu

Slew Rate SR RL=2kW;CL= 300 pF 7 12 — V/µs

Small Signal Bandwidth BW

-3dB

RL=2kW;CL=10pF

THAT1240 12 24 — MHz
THAT1243 17 33 — MHz
THAT1246 23 44 — MHz

R

=2kW;CL= 300 pF

L

THAT1240 11 17 — MHz
THAT1243 13 18 — MHz
THAT1246 14 20 — MHz

Output Gain Error G

ER(OUT)

Output Voltage Swing V

Output Offset Voltage V

Output Short Circuit Current I

Resistive Load R

Capacitive Load C

O

OFF

SC

Lmin

Lmax

f = 1 kHz — ±0.03 ±0.5 %

RL=2kW ±12.5 ±13 — V

No signal -7 0 +7 mV

RL=0W — ±25 — mA

—— 2 kW

300 — — pF

Vcc

In-

½U

diff

~

R

1

b

R

2

Sense

Vout

½U

diff

~

In+

R

3

a

V

~

CM

R

4

Ref

R

L

C

L

Vee

Part no.

THAT1240

THAT1243

THAT1246

Gain

0dB

-3 dB

-6 dB

R=R

13

9k

Ù

Ù

10.5 k

Ù

12 k

R=R

24

9k

Ù

Ù

7.5 k

Ù

6k

Figure 2. THAT1240 series test circuit

THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA

Tel: [phone]; Fax: [phone]; Web: www.thatcorp.com