1203S08-U THAT Corporation, 1203S08-U Datasheet - Page 10

• Manufacturer Part Number: 1203S08-U
• Description: Difference Amplifiers High-CMRR Bal Input Line Rec. -3dB SO-8
• Manufacturer: THAT Corporation

Specifications of 1203S08-U

• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Operating Temperature Range: 0 C to + 85 C
• Output Current: +/- 25 mA
• Operating Supply Voltage: +/- 18 V
• Package / Case: SOIC-8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Page 10
pins, but directs high-energy ESD impulses to the
rails. So long as the supply rails are adequately de-
coupled and the diodes themselves are reasonably
robust, all but the most drastic ESD events will not
affect the 1203/6 IC itself. Figure 14, which works
similarly, is appropriate for the 1200, which is lim-
ited to input signals up to about the supply rails.
1N4148 types, while the 12V Zener diodes should be
½ watt to allow them to support relatively high cur-
rents with 12V across them for the short duration of
an ESD pulse.
tions to the often difficult problem of ESD protection.
D
We will continue to work to find real world solu-
1
5 4 3 1
through D
5 4 3 1
2
2
2
3
2
1
3
1
J1
XLR-F
4
THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA
J1
XLR-F
in figures 13 and 14 can be
100R
100R
R2
100R
R1
100R
Tel: [phone]; Fax: [phone]; Web: www.thatcorp.com
R2
R1
RFI protection
RFI protection
470pF
C1
C2
470pF
470pF
C1
C2
470pF
Figure 13. RFI and ESD protection for the 1203 and 1206
Figure 14. RFI and ESD protection for the 1200
C3
100pF
C3
100pF
4k7
R3
4k7
R3
D1
D1
D3
D3
ESD protection
ESD protection
Vcc
Vcc
Vee
12V
Vee
D5
Please look to our web site for future application
notes regarding this subject.
against really strong ESD, such as lightning, so
please do not take this advice as suggesting that the
circuits of Figures 13 and 14 are completely immune
to ESD!
AC Coupling Inputs
inputs. However, if desired, we recommend the cir-
cuit of Figure 15. In this circuit Resistors R
benefit from the common-mode bootstrap via their
connection to CM
common-mode input impedance, preserving the ben-
12V
D6
InGenius High-CMRR Balanced Input Line Receiver ICs
D2
D2
Note that we know of no circuit that will protect
It is not necessary to AC couple the 1200-series
D4
D4
(see text)
(see text)
220uF
220uF
C b
C b
2
5
3
2
5
3
+
CM
IN-
IN+
+
IN
in
IN+
IN-
CM
IN
. This reduces their impact on
1203 or
1206
1
8
OUT
REF
CM
1
8
1200
OUT
REF
CM
Vcc
7
4
Vee
Vcc
Vee
7
Vcc
4
Vee
Vcc
Vee
OUT
100nF
U1
100nF
OUT
C5
100nF
U1
C4
100nF
C5
C4
6
6
OUT
OUT
1
and R
2