THAT1512S08-U Datasheet, PDF (7/8 Pages) List of Unclassifed Manufacturers – Low-Noise, High Performance Audio Preamplifier IC

THAT 1510/1512 Low-Noise
High Performance Audio Preamplifier
Page 7 of 8
Document 600031 Rev 08
impedance (as "seen looking in" from the coupling
capacitors) to the value of R1 + (2*R7) -- approxi-
mately 45 kΩ with the values shown. The increased
common mode impedance from T-bias improves LF
common mode rejection by reducing capacitor
matching requirements by more than a factor of ten
over the simpler circuit wherein R7=0 Ω. The circuit
works well with the values shown.
Note also that the overall common-mode input
impedance of the circuit is dominated by the
phantom-power resistors (R5 and R6). For the circuit
of Figure 5, this is approximately 5.9 kΩ per leg.
The 1510/1512 can be used as a line input
receiver by adding attenuation to the preamplifier
inputs and changing the circuit topology to allow
switching of input, fixed attenuation, and gain adjust-
ment. The optimum circuit depends on the specific
requirements of the application. For more details
and specific applications advice, please consult
THAT's application notes, or our applications
engineers at the address and telephone below or via
email at [e-mail].
Reference Terminal
The "Ref" pin provides a reference for the output
signal, and is normally connected to analog ground.
If necessary, the "Ref" pin can be used for offset
correction or DC level shifting. However, in order to
prevent spoiling the excellent common-mode rejec-
tion of the 1510/1512, the source impedance driving
the “Ref” pin should be under 1Ω.
ON
+48V
+15
R6
+15
D5
C6
6k8
-In
C4 _R3
1N4148
100n
C1
22u
10
470p
R5
D3
1N4004GP
C2
6k8
D4
1N4004GP
+In
470p
C5
R4
D1
1N4004GP
D2
1N4004GP
-In
R1
1k2
RG1
RG
V+
Out
Out
D6
R2
1k2 _1N4148
CG
Ref
RG2 _V-
+In
U1
THAT
22u ¹⁰
C3
47p
-15
R7
22k
1510/1512
C9
100n
-15
Figure 5. Recommended 1510 / 1512 Circuit with Phantom Power
Package Information
Both the THAT 1510 and 1512 are available in
8-pin SOIC, 8-pin DIP, and 14-pin SOIC packages.
The 1510 is also available in a 16-pin (widebody)
SOIC package. Other version/package combinations
will be considered based on customer demand.
The package dimensions are shown in Figures
6, 7, 8, & 9, while pinouts are given in Table 1.
All versions of the 1510 and 1512 are lead free
and RoHS compliant. Material Declaration Data
Sheets on the parts are available at our web site,
www.thatcorp.com or upon request.
THAT Corporation; 45 Sumner Street; Milford, MA 01757-1656; USA
Tel: [phone]; Fax: [phone]; Web: www.thatcorp.com
Copyright © 2013, THAT Corporation