STMICROELECTRONICS TDA7237

TDA7237
QUAD DIFFERENTIAL LINE DRIVER
PRODUCT PREVIEW
DESCRIPTION
The quad differential line driver is a monolithic integrated 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.
DIP18
ORDERING NUMBER: TDA7237
BLOCK DIAGRAM
VCC
10µF
10µF
C(ext)
18
CH1I
3
GND
5
CH2I
4
BIAS
GENERATOR
17
16
CH1
15
14
CH2
13
10µF
CH3I
12
7
CH3
11
10µF
CH4I
10µF
10
8
CH4
CH1Nout
CH2Iout
CH2Nout
CH3Iout
CH3Nout
CH4Iout
CH4Nout
1,2,6
N.C.
November 1995
9
CH1Iout
D95AU385
1/5
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
TDA7237
ABSOLUTE MAXIMUM RATINGS
Symbol
VS
Parameter
Supply Voltage
Value
Unit
20
V
Ptot
Tamb
Total Power Dissipation
Operating Ambient Temperature
750
-40 to 85
mW
°C
Tstg
Storage Temperature
-55 to 150
°C
PIN CONNECTION
N.C.
1
18
CEXT
N.C.
2
17
VS
CH1I
3
16
CH1IO
CH2I
4
15
CH1NO
GND
5
14
CH2IO
N.C.
6
13
CH2NO
CH3I
7
12
CH3IO
CH4I
8
11
CH3NO
CH4NO
9
10
CH4IO
D95AU386
THERMAL DATA
Symbol
Rth j-pins
Parameter
Thermal Resistance junction - pins
PIN FUNCTIONS
N.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
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Name
N.C.
N.C.
CH1I
CH2I
GND
N.C.
CH3I
CH4I
CH4NO
CH4IO
CH3NO
CH3IO
CH2NO
CH2IO
CH1NO
CH1IO
VS
CEXT
Function
Input to channel one
Input to channel two
Ground
Input to channel three
Input to channel four
Channel four non inverting output
Channel four inverting output
Channel three non inverting output
Channel three inverting output
Channel two non inverting output
Channel two inverting output
Channel one non inverting output
Channel one inverting output
Supply Voltage
By-pass Capacitor
Value
Unit
90
°C/W
TDA7237
ELECTRICAL CHARACTERISTICS (VCC = 10V; Tamb = 25°C; f = 1KHz, unless otherwise specified.)
Symbol
VS
ZI
SVR
Isg
Parameter
9
Input Impedance
15
11
V
30
KΩ
f = 10KHz
45
dB
40
mA
all pins
each pin
300
20
mA
mA
all pins
150
RL = 10KW; CL = 1000pF
35
3
Signal to Noise Ratio (1)
THD
Total Harmonic Distortion
VO = 4VRMS; RL = 10KW;
CL = 1000pF
Channel Separation
(2)
ZO
Gv
Unit
each pin
SR
CS
23
Max.
Output Short Circuit Current to
GND
S/N
35
Typ.
Supply Voltage Rejection
Supply Current
Slew Rate
VIDC
VODC
VCDC
Min.
Supply Voltage
Output Short Circuit Current to
VCC
Is
Test Condition
83
91
0.07
mA
50
0.1
mA
V/µs
dB
%
70
80
DC Input Voltage
5.8
6.25
6.6
V
DC Output Voltage
DC Cext Voltage
3.9
5.8
4.75
6.25
5.3
6.6
V
V
15.9
50
16.7
100
17.5
Ω
dB
pin 18
Output Impedance
Voltage Gain
dB
Notes:
1) Bw = 20Hz to 20KHz with 60dB/decade Rolloff (referred to 1.4VRMS)
2) All input AC grounded via 10µF capacitor
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TDA7237
DIP18 PACKAGE MECHANICAL DATA
mm
DIM.
MIN.
a1
0.254
B
1.39
TYP.
MAX.
MIN.
TYP.
MAX.
0.010
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
Z
4/5
inch
3.3
0.130
1.34
0.053
TDA7237
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
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