TDA7237
QUAD DIFFERENTIAL LINE DRIVER
PRODUCT PREVIEW
DESCRIPTION
The quad differential line driver is a monolithic in-
tegrated circuit intended to provide low noise, low
distortion voltage gain.
Additionally, the signal is converted from a single
ended to a differential signal pair for applications
reuiring signal isolation from DC grounded.
The four channel's gains are matched within 1dB.
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
November 1995
BIAS
GENERATOR
CH1
18
3
5
16
15
CH2
4
14
13
CH3
7
12
11
CH4
8
10
9
17
1,2,6
N.C.
C(ext)
V
CC
CH1I
GND
CH2I
CH3I
CH4I
CH1Iout
CH1Nout
CH2Iout
CH2Nout
CH3Iout
CH3Nout
CH4Iout
CH4Nout
10
F
10
F
10
F
10
F
10
F
D95AU385
BLOCK DIAGRAM
DIP18
ORDERING NUMBER: TDA7237
1/5
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
S
Supply Voltage
20
V
P
tot
Total Power Dissipation
750
mW
T
amb
Operating Ambient Temperature
-40 to 85
C
T
stg
Storage Temperature
-55 to 150
C
THERMAL DATA
Symbol
Parameter
Value
Unit
R
th j-pins
Thermal Resistance junction - pins
90
C/W
PIN FUNCTIONS
N.
Name
Function
1
N.C.
2
N.C.
3
CH1I
Input to channel one
4
CH2I
Input to channel two
5
GND
Ground
6
N.C.
7
CH3I
Input to channel three
8
CH4I
Input to channel four
9
CH4NO
Channel four non inverting output
10
CH4IO
Channel four inverting output
11
CH3NO
Channel three non inverting output
12
CH3IO
Channel three inverting output
13
CH2NO
Channel two non inverting output
14
CH2IO
Channel two inverting output
15
CH1NO
Channel one non inverting output
16
CH1IO
Channel one inverting output
17
V
S
Supply Voltage
18
CEXT
By-pass Capacitor
N.C.
N.C.
CH1I
CH2I
GND
CH3I
N.C.
CH4I
CH4NO
1
3
2
4
5
6
7
8
9
CH4IO
CH3NO
CH3IO
CH2IO
CH2NO
CH1NO
CH1IO
V
S
CEXT
18
17
16
15
14
12
13
11
10
D95AU386
PIN CONNECTION
TDA7237
2/5
ELECTRICAL CHARACTERISTICS (V
CC
= 10V; T
amb
= 25C; f = 1KHz, unless otherwise specified.)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
V
S
Supply Voltage
9
11
V
Z
I
Input Impedance
15
23
30
K
SVR
Supply Voltage Rejection
f = 10KHz
35
45
dB
Isg
Output Short Circuit Current to
GND
each pin
40
mA
all pins
300
mA
Output Short Circuit Current to
V
CC
each pin
20
mA
all pins
150
mA
Is
Supply Current
35
50
mA
S
R
Slew Rate
R
L
= 10KW; C
L
= 1000pF
3
V/
s
S/N
Signal to Noise Ratio (1)
83
91
dB
THD
Total Harmonic Distortion
V
O
= 4V
RMS
; R
L
= 10KW;
C
L
= 1000pF
0.07
0.1
%
C
S
Channel Separation
(2)
70
80
dB
V
IDC
DC Input Voltage
5.8
6.25
6.6
V
V
ODC
DC Output Voltage
3.9
4.75
5.3
V
V
CDC
DC C
ext
Voltage
pin 18
5.8
6.25
6.6
V
Z
O
Output Impedance
50
100
G
v
Voltage Gain
15.9
16.7
17.5
dB
Notes:
1) Bw = 20Hz to 20KHz with 60dB/decade Rolloff (referred to 1.4V
RMS
)
2) All input AC grounded via 10
F capacitor
TDA7237
3/5
DIP18 PACKAGE MECHANICAL DATA
DIM.
mm
inch
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
a1
0.254
0.010
B
1.39
1.65
0.055
0.065
b
0.45
0.018
b1
0.25
0.010
D
25.4
1.000
E
8.5
0.335
e
2.54
0.100
e3
22.86
0.900
F
7.1
0.280
I
3.93
0.155
L
3.3
0.130
Z
1.34
0.053
TDA7237
4/5
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectronics.
1995 SGS-THOMSON Microelectronics All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore -
Spain - Sweden - Switzerland - Taiwan - Thaliand - United Kingdom - U.S.A.
TDA7237
5/5
PDF 
ZIP