1570N16-U THAT Corporation, 1570N16-U Datasheet

Microphone Preamplifiers Low Noise Differential Pre-amp

1570N16-U

Manufacturer Part Number

1570N16-U

Description

Microphone Preamplifiers Low Noise Differential Pre-amp

Manufacturer

THAT Corporation

Datasheet

1.1570N16-U.pdf (12 pages)

Specifications of 1570N16-U

Minimum Operating Temperature

- 40 C

Mounting Style

SMD/SMT

Operating Supply Voltage

5 V to 18 V

Operating Temperature Range

- 40 C to + 85 C

Supply Current

7.5 mA

Supply Voltage (max)

18 V

Supply Voltage (min)

5 V

Thd Plus Noise

0.006 %

Voltage Gain Db

60 dB

Available Set Gain

0 dB to 60 dB

Input Offset Voltage

+/- 525 mV

Input Bias Current (max)

22 uA

Maximum Input Resistance

10 KOhms

Maximum Operating Temperature

+ 85 C

Package / Case

QFN-16

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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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.

a wide range of gains. The 1570 supports the tradi-

tional approach to gain control (viz., THAT's 1510 or

1512) by fixing R

gain. However, the 1570 also supports varying all

three resistors simultaneously with a dual-gang poten-

tiometer or a switched resistor network. This flexible

approach enables the designer to optimize noise over a

wider range of gains than is possible with fixed R

Low Noise:

Low THD+N:

Low Current: 7.5 mA typ

Wide Bandwidth: 4.2MHz @40dB gain

High Slew Rate: 53 V/μs

Wide Signal Swing: >28.7dBu

Gain adjustable from 0 to >60 dB

Differential output

Small 4 x 4mm QFN16 package

Mates with THAT5171

Digital Preamplifier Controller IC

, and R

The THAT1570 is a versatile, high performance

Gain is adjusted via three external resistors (R

1 nV/√Hz input noise (60 dB gain)

0.0003% ≤ 30 dB gain

0.0008% @ 40 dB gain

(±18V supplies)

), making it possible to optimize noise over

FEATURES

Figure 1. THAT1570 Block Diagram

and R

Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com

THAT Corporation; 45 Sumner Street; Milford, MA 01757-1656; USA

, and varying R

to control

Description

and

tion to differential input devices such as A/D convert-

ers. The part operates from as little as

through

at unity gain, the part accepts >+28dBu input signals.

THAT’s 5171 Digital Preamplifier Controller IC. The

part-pair comprises an optimized, digitally controlled

audio preamplifier.

mentary

including laser-trimmed Si-Chrome thin-film resistors,

the 1570 improves on existing integrated microphone

preamps by offering more versatile gain configuration,

lower noise at low gains, higher slew rate, and lower

distortion.

The 1570's differential output simplifies connec-

The 1570 is designed to mate perfectly with

Designed from the ground up in THAT's comple-

Microphone Preamplifiers

Digitally-Controlled Microphone

Preamplifiers

Differential Low-Noise Preamplifiers

Differential Summing Amplifiers

Differential Variable-Gain Amplifiers

Moving-Coil Transducer Amplifiers

Line Input Stages

Audio

Sonar

Instrumentation

bipolar

18V supplies. Running on

APPLICATIONS

Pin Name

dielectric-isolation

OUT2

OUT1

Rg1

Rg2

N/C

IN1

IN2

Table 1. Pin Assignments

Low-Noise, Differential

Audio Preamplifier IC

THAT1570

18V supplies,

process

Thermal Pad

QFN Pin

5V up

and

Related parts for 1570N16-U

1570N16-U Summary of contents

Page 1

... Figure 1. THAT1570 Block Diagram 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. Document 600132 Rev 01 APPLICATIONS Microphone Preamplifiers Digitally-Controlled Microphone Preamplifiers Differential Low-Noise Preamplifiers Differential Summing Amplifiers ...

Page 2

... Vrms 5. Unless otherwise noted 2.21 kΩ 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 SPECIFICATIONS Operating Temperature Range (T +0. ...

Page 3

... Total Harmonic Distortion THD + N Equivalent Input Noise Voltage Equivalent Input Noise Current Noise Figure 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 Conditions ...

Page 4

... IN- RFI PROTECTION Figure 2. 1570 Typical Application Circuit Using Single-Gang Pot for Gain Control 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 Applications The potentiometer taper will set the circuit’ ...

Page 5

... IN- RFI PROTECTION Figure 3. 1570 Typical Application Circuit Using Dual-Gang Pot for Gain Control 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 source impedances will increase noise seen (and heard!) with open inputs ...

Page 6

... IN- RFI PROTECTION Figure 5. 1570 Typical Application Circuit With Single-Gang Pot for Gain Control, AC-Coupled R 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 Vcc ...

Page 7

... IN- RFI PROTECTION Figure 6. 1570 Typical Application Circuit With Dual-Gang Pot for Gain Control, AC-Coupled R 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 corner is about 5 Hz. ...

Page 8

... The ultimate floor is set by the impedance of the microphone, but any 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 9

... A dual version of this part, the 1280, and low cost versions (1250 single and 1290 dual) are also 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 10

... The input signal lines are susceptible to magnetic pickup from power supply currents, which often take 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 11

... Figure 10. QFN-16 Thermal Solder Pad Document 600132 Rev 01 Min Typ Max Units 16 Pin QFN 110 ºC/W JEDEC JESD22-A113-D (250 ºC) 1 Order Number 1570N16-U Table 2. Ordering information Hole: 0.254 mm (0.010”) Pad: 0.30 mm (0.012”) 0 ...

Page 12

... 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 ...

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