Low-Noise, Differential Audio Preamplifier IC THAT1583 FEATURES APPLICATIONS Low Noise: Microphone Preamplifiers -128.9dBu (1.9nV/Hz) EIN 60dB gain Digitally-Controlled Microphone Low THD+N: Preamplifiers 0.001% 40 dB gain 0.006% 60 dB gain Differential Low-Noise Preamplifiers Low Current: 7.0 mA typ Differential Summing Amplifiers Wide Bandwidth: 1.7MHz 40dB gain Differential Variable-Gain Amplifiers High Slew Rate: 50 V/s Moving-Coil Transducer Amplifiers Wide Output Signal Swing: > +28dBu Line Input Stages Gain adjustable from 0 to >60 dB Differential output Audio Small 4 x 4mm QFN16 package Sonar Mates with THAT s family of Digital Instrumentation Preamplifier Controller ICs Description The THAT 1583 is a versatile, high performance optimize the output differential amplifier to suit current-feedback amplifier suitable for differential the specific application. microphone preamplifier and bus summing In analog variable-gain applications the part applications. It improves on previous, traditional supports the traditional approach using fixed R A current-feedback designs (viz. THAT s 1510 & and R and a single-section variable element for B 1512) by offering a more versatile configuration R . But, it also supports a dual-element alternative G that can yield lower noise at low gains, lower that offers improved performance. distortion overall, and higher slew rate. In addition to analog-controlled applications, the Amplifier gain is determined by three external 1583 is designed to mate perfectly with THAT s resistors (R , R , and R ). This makes it possible to A B G series of Digital Preamplifier Controller ICs to optimize noise and bandwidth over a wide range of produce an optimized, digitally controlled gains, as well as optimize the taper of gain vs. preamplifier. rotation in variable-gain, pot-controlled applications. The 1583 operates from as little as 5 V up The 1583 s differential output simplifies connec- through 18 V supplies. It accepts greater than tions to differential input devices such as A/D +28 dBu input signals at unity gain when converters. When required, designers are free to operated from 18V supplies. Pin Name QFN Pin N/C* 1 OUT2 2 OUT1 3 N/C* 4 N/C* 5 Rg1 6 IN1 7 N/C* 8 N/C* 9 IN2 10 N/C* 11 V- 12 V+ 13 N/C* 14 Rg2 15 N/C* 16 V- Thermal Pad Figure 1. THAT1583 Block Diagram Table 1. Pin Assignments * N/C pins should be left open and not connected to other traces on the PCB THAT Corporation 45 Sumner Street Milford, Massachusetts 01757-1656 USA Tel: +1 508 478-9200 Fax +1 508 478-0990 Web: www.thatcorp.com Copyright 2016, THAT Corporation Doc 600173 Rev 03 THAT 1583 Low-Noise Page 2 of 16 Document 600173 Rev 03 Differential Audio Preamplifier IC 1 SPECIFICATIONS 2 Absolute Maximum Ratings Supply Voltage (V+) - (V-) 40 V Operating Temperature Range (T ) -40 to +85 C OP Maximum Input Voltage (V ) (V+) +0.5V to (V-)-0.5V Junction Temperature (T ) +125 C IMax JMAX Storage Temperature Range (T ) -40 to +125 C Output Short-Circuit Duration, STG between outputs and/or GND (t ) Continuous SH 3 ,4 ,5 Electrical Characteristics Parameter Symbol Conditions Min Typ Max Units Power Supply Supply Voltage V+ - (V-) Referenced to GND 5 18 V Supply Current I+ -(I-) No Signal 7.0 10 mA Input Characteristics Input Bias Current I No signal either input connected to GND 2.0 4.4 A B Input Offset Current I No signal -440 +440 nA B-OFF R Input Bias Current I No signal -20 +2 +20 A G BRG R Input Offset Current I No signal -4.5 +4.5 A G BRG-OFF Differential Input Offset Voltage V No signal, Includes I * R OS BRG-OFF G 0 dB gain -15 +15 mV +60 dB gain -450 +450 V Input Common Mode Voltage Range V Common Mode (V-) + 1.5 (V+) -4 V IN CM Maximum Differential Input Level V R = 26.4 dBu IN-BAL G Supply Voltage 18V 28.0 dBu Output Characteristics Differential Output Offset G = gain -(15 + 0.45*G) (15 + 0.45*G) mV Common Mode Output Voltage V No signal -630 mV OSCM IN1, IN2 connected to GND Maximum Single Output Voltage V G=20dB, R = 2 k (V-) + 1.2 (V+) - 2 V OUT-SINGLE L Differential Short Circuit Current I R = 0 70 mA SC L Maximum Capacitive Load C Over entire temperature range 30 pF L MAX Stable operation 30% overshoot 75 pF Maximum Differential Output Level V R = 2 k 28 dBu OUT L Gain > 2 dB 1. All specifications are subject to change without notice. 2. Stresses above those listed underAbsolute Maximum Rating may cause permanent damage to the device. These are stress ratings only the functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. 3. Unless otherwise noted, T = 25C, V+ = +15V, V- = -15V. A 4. 0 dBu = 0.775 Vrms 5. Unless otherwise noted, feedback resistors = 2.21 k C = 10 pF. Circuit is as shown in Figure 15. L THAT Corporation 45 Sumner Street Milford, Massachusetts 01757-1656 USA Tel: +1 508 478-9200 Fax +1 508 478-0990 Web: www.thatcorp.com Copyright 2016, THAT Corporation All rights reserved.