1646 查看數據表（PDF） - THAT Corporation
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1646 Datasheet PDF : 12 Pages
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Document 600078 Rev 05
Page 8 of 12
THAT1606/1646 Balanced Line Driver ICs
Vcc C1
C4
100n
In
C5
100n
100n
12
4
7 Vcc
14
In+ Cap1
6 In-
Out+
5
Out-
Gnd Cap2
Vee
3
13 U1
11
THAT1606
Vee
R1
1M0
Out+
Out-
Figure 6. THAT 1606 with output common-mode offset reduction and single-ended input drive
Vcc C1
C4
100n
In+
In-
C5
100n
100n
12
4
7 Vcc
14
In+ Cap1
6 In-
Out+
Out-
5 Gnd Cap2
Vee
3
13 U1
11
THAT1606
Vee
R1
1M0
Out+
Out-
Figure 7. THAT 1606 with output common-mode offset reduction and differential input drive
put offset voltage, as indicated in the specifications
section. C1 and C2 are typically high quality
non-polarized electrolytic capacitors.
1606 circuits
Figures 6 and 7 show the basic amplifier configu-
rations for a 1606. The 1606 differs from the 1646
in two respects. First, the 1606 includes a nega-
tive-sense input pin (pin 6), so offers a differential in-
put. This can be useful in connecting the output
driver to the output of modern D/A converters, which
usually present differential outputs. Second, instead
of two 10uF capacitors, the 1606 uses an 0.1uf ca-
pacitor (C1) and 1MW (R1) resistor to reduce com-
mon-mode dc offset. Generally, these components
will cost less, and take up less space on the circuit
board than the two large capacitors required for the
1646. C1 should be a high-quality film type capaci-
tor to minimize low-frequency distortion when driv-
ing single-ended loads.
RFI protection
These line drivers can easily drive cables hun-
dreds of feet in length without becoming unstable,
but such long cables can act as antennae which can
pick up RFI and direct it into the circuit. The circuit
THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA
Tel: +1 (508) 478-9200; Fax: +1 (508) 478-0990; Web: www.thatcorp.com
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