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參數(shù)資料
| 型號(hào)： | THAT1512 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Low Noise, High Performance Microphone Preamplifier IC |
| 中文描述： | 低噪聲，高性能麥克風(fēng)前置放大器IC |
| 文件頁數(shù)： | 5/6頁 |
| 文件大?。?/td> | 129K |
| 代理商： | THAT1512 |
tempco of the internal resistors (±20 ppm/°C typi-
cal).
Noise Performance
Thoughtful design results in these devices having
significantly lower noise at low gains than similar IC
microphone preamps. At zero dB gain, equivalent in-
put noise of the THAT 1510 is 55 nV/ Hz, nearly
6 dB better than competitive IC designs.
usual topology of the THAT 1512 results in an equiv-
The un-
alent input noise of 34 nV/ Hz at zero dB gain, which
makes it comparable to some of the better discrete
designs currently available.
At 1 kHz, the equivalent
input noise for both devices is 1 nV/ Hz at 60 dB
gain.
Inputs
Protection diodes are employed at all pins except
V+ and V- of the THAT 1510/1512. These diodes re-
duce the likelihood of accidental ESD/EOS damage to
the IC. Other diodes across the base-emitter junc-
tions of the input transistors prevent reverse bias of
these junctions and consequent degradation of their
noise performance.
The inputs of the THAT 1510 and1512's are float-
ing, so a dc bias connection is required to maintain
the inputs within the IC's input common-mode range.
Four different schemes are shown in Figures 2, 3, 4,
and 5. Note that the values of R1 and R2 in these fig-
ures should be kept small to minimize pickup of un-
wanted noise and interference.
often used, since some microphones require a differ-
ential input impedance of this magnitude.
nately, one would usually desire a significantly higher
common mode input impedance to minimize the
common mode degradation caused by unbalanced
source impedances.
Figure 5 shows a technique
which allows higher common mode input impedance
while maintaining a lower differential source imped-
ance.
A value of 1 k
is
Unfortu-
Reference Terminal
The "Ref" pin provides the reference for the out-
put signal, and is normally connected to analog
ground.
If necessary, the "Ref" pin can be used for
offset correction or DC level shifting. A non-zero ref-
erence source resistance will reduce the IC's com-
mon-mode
rejection
(CMR)
by
the
ratio
of
10 k /R
REF
.
Phantom Power
Phantom power is required for condensor micro-
phones.
A phantom power circuit is shown in Fig-
ure 4.
Diodes D1 through D6 are necessary to
protect the THAT 1510/1512 from transient voltages
THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA
Tel: +1 508 478-9200; Fax: +1 508 478-0990; Web: www.thatcorp.com
600031 Rev. 7/23/02
Preliminary Information
Page 5
RG
+In
3
4
Out
6
7
5
-In
2
RG1
1
RG2
8
U1
THAT 1510
In-
In+
R1
1k
R2
1k
C1
470p
C2
470p
C3
47p
Out
C4
47u
C5
47u
D1
1N757
D2
1N757
R3
51R
R4
51R
R6
6k8
R5
6k8
+48V
D3
1N5818
D4
1N5818
D5
1N5818
D6
1N5818
-15
+15
C6
100n
C9
100n
Ref
V-
V+
Figure 4. Typical 1510 / 1512 Circuit with Phantom Power
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參數(shù)描述 |
|---|---|
| THAT1512P08-U | 制造商:THAT CORPORATION 功能描述:IC PRE-AMP MICROPHONE DIP8 制造商:THAT CORPORATION 功能描述:IC, PRE-AMP, MICROPHONE, DIP8 制造商:THAT CORPORATION 功能描述:IC, PRE-AMP, MICROPHONE, DIP8; Supply Voltage Range: 5V to 20V; Audio IC Case Style:DIP; No. of Pins:8; Operating Temperature Min:-40C; Operating Temperature Max:85C; Bandwidth:7MHz; Base Number:1512; Control / Process ;RoHS Compliant: Yes |
| THAT1512S08-U | 制造商:THAT CORPORATION 功能描述:PREAMP MICROPHONE SMD 1510 SO8 制造商:THAT CORPORATION 功能描述:PREAMP, MICROPHONE, SMD, 1510, SO8 制造商:THAT CORPORATION 功能描述:PREAMP, MICROPHONE, SMD, 1510, SO8; Supply Voltage Range: 5V to 20V; Audio IC Case Style:SOIC; No. of Pins:8; Operating Temperature Min:-40C; Operating Temperature Max:85C; Bandwidth:7MHz; Base Number:1512; Control / Process ;RoHS Compliant: Yes |
| THAT1606Q16-U | 制造商:THAT CORPORATION 功能描述:LINE DRIVER BALANCED SMD 1606 制造商:THAT CORPORATION 功能描述:LINE DRIVER, BALANCED, SMD, 1606 制造商:THAT CORPORATION 功能描述:LINE DRIVER, BALANCED, SMD, 1606; Device Type:Differential; Supply Voltage Min:4V; Supply Voltage Max:18V; Driver Case Style:QSOP; No. of Pins:16; Operating Temperature Min:-40C; Operating Temperature Max:85C; Base Number:1606; ;RoHS Compliant: Yes |
| THAT1646P08-U | 制造商:THAT CORPORATION 功能描述:LINE DRIVER BALANCED 1646 DIP8 制造商:THAT CORPORATION 功能描述:LINE DRIVER, BALANCED, 1646, DIP8 制造商:THAT CORPORATION 功能描述:IC, BALANCED LINE DRIVER, DIP-8; Device Type:Differential Line; IC Interface Type:-; Supply Voltage Min:4V; Supply Voltage Max:18V; Driver Case Style:DIP; No. of Pins:8; Operating Temperature Min:-40C; Operating Temperature Max:85C;RoHS Compliant: Yes |
| THAT1646S08-U | 制造商:THAT CORPORATION 功能描述:LINE DRIVER BALANCED 1646 SO-8 制造商:THAT CORPORATION 功能描述:LINE DRIVER, BALANCED, 1646, SO-8 制造商:THAT CORPORATION 功能描述:LINE DRIVER, BALANCED, 1646, SO-8; Device Type:Differential; Supply Voltage Min:4V; Supply Voltage Max:18V; Driver Case Style:SOIC; No. of Pins:8; Operating Temperature Min:-40C; Operating Temperature Max:85C; Base Number:1646; ;RoHS Compliant: Yes |
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