6266N48-U THAT

+ + 2-Channel Low-Noise Programmable- Gain Preamplifier - ADC Driver IC THAT 6261, 6263, 6266 FEATURES APPLICATIONS 1 Low noise: 127 dBu EIN (max gain) Digitally controlled input stages 8 dB to +34 dB gain Microphone preamplifiers Choice of step size: 1, 3, or 6dB Instrumentation amplifiers +16.5 dBu maximum input (min gain) Differential amplifiers Integrated ADC driver with reference input High common-mode rejection: >65dB Audio mixing consoles Very low power: 30 mW per channel PC audio interfaces Unipolar or Bipolar power supplies Digital video cameras Analog: +10V +5V or 5V Digital: +3.3V Digital audio snakes Small form factor: 7x7mm QFN package Zero crossing detectors minimize zipper noise Portable audio recorders Daisy-chainable SPI control interface Programmable gain amplifiers Individually controlled Standby and Mute Description The THAT 626x is a family of two-channel all-in- BUSY pin for each channel allows external events to be one digitally controlled preamplifiers with integrated synchronized with zero crossings. This enables exter- ADC drivers. Gain is programmable from -8 to +34 dB. nal gain changes to by seamless with internal ones. The 626x family includes three products distinguished The low-power (60mW) devices can be powered primarily by step size: from unipolar (+10V and +5 V) or bipolar (5 V) Part 6261 6263 6266 supplies. The parts are controlled via a 4-wire SPI interface running at up to 7.5 MHz (+3.3V supply). Step size 1dB 3dB 6dB Multiple devices may be daisy-chained using one chip All three parts offer excellent noise performance: at select. +34dB gain, the 6261 EIN is 127dBu, while the 6263 Four general purpose logic outputs (GPOs) are and 6266 are -126dBu. Dynamic range at -8dB gain is available to control external circuitry (e.g., pad, phan- up to 118.7 dB. tom power). The GPOs may be synchronized with ze- The parts outputs interface directly to commonly ro-crossings. Each channel may be set to low-power used 5 V ADC ICs with 2Vrms differential full-scale standby mode, and can be muted by about 62 dB. inputs. Therefore, they serve as a complete solution to connect an audio input to an A/D converter. The 626x comes in a 7X7 mm 48-pin QFN pack- To minimize audibility of gain changes with signal, age. They are truly all-in-one mic preamps from XLR all 626x family members can be programmed to syn- to ADC. chronize gain changes with signal zero crossings. A +5V -5V +5V GND V V PO+ DI+ PO- DI- V V AGND A+ A- CM AD MIC / LINE RFB- REF INPUT CFB- IN+ OUT- RFI CH1 CG1 ADC AND ADC CH1 PHANTOM OUT+ 2 VRMS FS DRIVER PREAMP CG2 POWER CFB+ PROTECTION IN- RFB+ RFB RG GAIN ZCD GPO 1-4 1 4 V D SERIAL SPI +3.3V INTERFACE DGND 4 GND ZCD 2 Figure 1. 626x simplified block diagram, bipolar supplies (one channel shown). 1 6261, 150 termination, 20kHz bandwidth, unweighted 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 2018, THAT Corporation Doc 600190 Rev 05 Document 600190 Rev 05 Page 2 of 20 THAT 626x 2-Channel Low-Noise Programmable Gain Preamplifier ADC Driver IC 2 SPECIFICATIONS 3 Absolute Maximum Ratings Total Analog Supply (V V ) 13 V Maximum Analog Dix Input Voltage V V +2.5V A+ A- IAMAX DI A+ Preamp Positive Supply (V AGND) 6.5 V Minimum Analog Dix Input Voltage (V ) V - 0.3V A+ IAMIN DI A- Preamp Negative Supply (V AGND) -6.5 V Maximum Analog Inx Input Voltage (V ) V + 0.3V A- IAMAX IN A+ Digital Logic Supply (V DGND) +4.5 V Minimum Analog Inx Input Voltage (V ) V - 0.3V D IAMIN IN A- AGND DGND Difference (AGND DGND) 0.3 V Maximum Digital Input Voltage (V ) V + 0.3 V IDMAX D (IN+ , IN- , CH1 CH1 Maximum Input Current 20 mA Minimum Digital Input Voltage ( V ) DGND 0.3 V IDMIN IN+ , IN- ) CH2 CH2 Maximum V DGND Current 65 mA Storage Temperature Range (T ) -40 to +125 C D STG ADC Driver Supply (V AGND) +5.5V Operating Temperature Range (T ) -40 to +85 C AD OP Maximum Junction Temperature (T ) +125 C JMAX 4 626x Electrical Characteristics Parameter Symbol Conditions Min. Typ. Max. Units Power Supply Recommended Operating Voltages Bipolar supply +3.9 +5.0 +5.5 V Preamp Positive Supply VA+ Unipolar supply +7.8 +10.0 +11.0 V Bipolar supply -3.9 -5.0 -5.5 V Preamp Negative Supply V A- Unipolar supply -0.1 0 +0.1 V ADC Driver Supply V +3.8 +5.0 +5.25 V AD Digital Logic Supply V +3.0 +3.3 +3.6 V D Quiescent Current I Normal operation 4.8 6.5 mA A+ Preamp Positive Supply Current I Both channels in standby 100 A A+ off I Normal operation 4.8 6.5 mA A- Preamp Negative Supply Current I Both channels in standby 100 A A- off I Normal operation 2.5 4.0 mA AD ADC Driver Supply Current I Both channels in standby 100 A AD off 6261/6263 10 A Digital Logic Supply Current I D 6266 0.5 A System AC Characteristics 6261 6263 6266 Parameter Symbol Conditions Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Units Gain Range -8 34 -8 34 -8 34 dB Step Size 0.5 1 1.5 2 3 4 4 6 8 dB Gain: -8dB ~30dB -0.5 0.2 0.5 -0.5 0.2 0.5 -0.5 0.2 0.5 dB Gain Error Gain: 31dB ~ 34dB -1 0.3 1 -1 0.3 1 -1 0.3 1 dB Gain Matching -0.25 0.02 0.25 -0.25 0.02 0.25 -0.25 0.02 0.25 dB Between Channels Mute Attenuation -62 -62 -62 dB Rs=150 ohm Channel Isolation -100 -100 -100 dB f=1kHz f=1kHz,Gain=-8dB 65 65 65 dB CMRR Gain= +34dB 104 104 104 dB Max Differential (-8 dB Gain THD: V 16.5 16.5 16.5 dBu ID Input Level 0.15% 1kHz) Input Common- V Linear operation V +1.2 V -1.2 V +1.2 V -1.2 V +1.2 V -1.2 V ICM A- A+ A- A+ A- A+ Mode Range 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 2018, THAT Corporation All rights reserved.