that1570 THAT Corporation, that1570 Datasheet
that1570
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that1570 Summary of contents
Page 1
... Differential output Small 4 x 4mm QFN16 package Mates with THAT5171 Digital Preamplifier Controller IC The THAT1570 is a versatile, high performance current-feedback amplifier suitable for differential microphone preamp and bus summing applications. The IC comes in a small QFN package, which saves PCB space over discrete and other integrated solutions ...
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... No signal; IN1, IN2 connected to GND OSCM kΩ Ω; Cold start Ω; Continuous R L Over entire temperature range L MAX Stable operation 50% overshoot kΩ L THAT1570 Low-Noise Differential Audio Preamplifier IC 2,3 ) -40 to +85 º Continuous SH ) +125 ºC JMAX 2,4,5 Min Typ Max Units — 5 ...
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... THAT1570 Low-Noise Differential Audio Preamplifier Electrical Characteristics (con’t) Parameter Symbol AC Characteristics Gain Equation G Feedback Impedance R Differential Gain G Power Supply Rejection Ratio PSRR Bandwidth -3dB f -3dB Slew Rate Total Harmonic Distortion THD + N Equivalent Input Noise Voltage Equivalent Input Noise Current Noise Figure THAT Corporation ...
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... Document 600132 Rev 01 Gain Setting Three external resistors ( and gain of the THAT1570. Gain follows the formula where A is the (differential voltage gain of the part (See Figure 2, in which R made fixed (R ) portion and a variable (R GF portion) ...
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... THAT1570 Low-Noise Differential Audio Preamplifier this is ~255 mV. As well, if the wiper of the pot loses contact with the element, gain will abruptly change to unity, with an attendant change in dc offset as well. To minimize dc offsets, consider the circuits of Figures 5 and 7, which ac couple Improving Noise Performance The 1570 has extremely low input voltage noise ...
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... THAT 1570 IN1 10k 10 3300u IN2 R2 1k0 THAT1570 Low-Noise Differential Audio Preamplifier IC -A OUT1 V -A OUT2 V Diodes and V . These +15V C9 100n OUT+ Vcc ...
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... THAT1570 Low-Noise Differential Audio Preamplifier However, while the internal diodes are effective against ESD, they should not be relied upon to protect against excessive input voltage, which can result in significant current flow. This is a particular problem when the preamplifier includes a source of +48 V phantom power (see text below) but can be of ...
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... A/D converters require a dc offset at their inputs for proper operation. In such cases, drive circuitry should be configured to add the appropriate dc offset to the 1570 outputs in order to match the converter. As well, the 1570 has common-mode gain of unity, regardless THAT1570 Low-Noise Differential Audio Preamplifier +15V D5 THAT ...
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... THAT1570 Low-Noise Differential Audio Preamplifier PHANTOM POWER +48V R5 R6 6k81 6k81 IN+ 10 47u C1 22p C3 C5 220p R4 + IN- 10 47u C2 22p RFI PHANTOM POWER PROTECTION PROTECTION Figure 8. 1570 Typical Phantom Power Application Circuit With Dual-Gang Pot for Gain Control, AC-Coupled R Common-mode inputs are presented at the output, along with the common-mode dc offset of -610 mV ...
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... Figure 10 to provide uniform heat distribution between the top layer of the PCB to the bottom layer. For current feedback amplifiers such as the THAT1570, stray capacitance to ground or power planes results in higher gains at high frequencies. This compromises common-mode rejection at high frequencies and, in extreme cases, can even lead to oscillation ...
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... THAT1570 Low-Noise Differential Audio Preamplifier Package and Soldering Information Parameter Symbol Package Style Thermal Resistance Environmental Regulation Compliance Soldering Reflow Profile Moisture Sensitivity Level MSL Above-referenced JEDEC soldering profile BOTTOM VIEW Exposed Thermal Pad ...
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... Document 600132 Rev 01 THAT Corporation; 45 Sumner Street; Milford, MA 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com Copyright © 2009, THAT Corporation; All rights reserved. Page Differential Audio Preamplifier IC Notes THAT1570 Low-Noise ...