ISL22102IR20Z-EVAL Renesas

DATASHEET ISL22102 FN6788 Rev 2.00 32 Tap, Push-Button, Dual Audio Logarithmic Potentiometer with Buffer Amplifiers September 21, 2015 and Audio Detection The ISL22102 integrates two digitally controlled Features potentiometers (DCP) with buffered wiper outputs and an Dual Audio Control Two 32 Taps Log Pots internal bias voltage generator (VB) on a monolithic CMOS integrated circuit. The wiper position is adjusted by the user Buffered Wiper Outputs through simple Up and Down push buttons, ideal for stereo Audio Detection with Threshold Input and Controlled volume control in audio applications. Delay Each potentiometer is implemented using 31 polysilicon Zero Amplitude Wiper Switching (ZAWS) resistors in a logarithmic array. Between each of the Simple Push-button Interface resistors are tap points connected to the wiper terminal through switches. When powered up, the wipers are reset to Auto Increment/decrement After 1s Button Press the -20dB position. Standby Mode In addition to the ISL22102s low noise design, the ISL22102 Mute Function also contains a zero-crossing detection circuitry to further Total Resistance: 18.5k each DCP (Typical) minimize click and pop noise during volume transition. Voltage Operation The internal VB generator of the ISL22102 provides a - VCC = 2.7V to 5.5V precision middle scale voltage reference that reduces - AVCC = 2.7V to 5.5V external circuitry and simplifies application design. Temp Range = -40C to +85C The ISL22102 implements two power saving techniques for power critical applications. It is a Standby Mode that can be Package Options enabled to reduce the power consumption of the part when - 20 Ld TSSOP DCP is not in use. The part also has Audio Detection -20 Ld QFN circuitry that provides an indication FLAG to external devices Pb-Free (RoHS Compliant) and services. The FLAG can be delayed through D0, D1 and D2 pin configuration. By connecting the FLAG to the standby Audio Performance pin (SB), it will automatically put the part into Standby Mode. 0dB to -72dB Volume Control Pinout -90dB Mute ISL22102 SNR: -90dB (20 LD QFN) TOP VIEW THD+N: 0.01% 1kHz Crosstalk Rejection: -100dB 1kHz 20 19 18 17 16 Channel-to-Channel Variation: 0.1dB DN 1 15 D0 Mid point 3dB-Cutoff: 100kHz MUTE 2 14 V TH Applications VCC GND 3 13 Set Top Boxes AVCC 4 12 HPB Stereo Amplifiers LEFT IN HPA 5 11 DVD Players Portable Audio Products 67 8 9 10 FN6788 Rev 2.00 Page 1 of 12 September 21, 2015 LEFT OUT UP CB SB VB FLAG RIGHT OUT D2 RIGHT IN D1ISL22102 Ordering Information PART NUMBER TOTAL RESISTANCE TEMP RANGE PACKAGE PKG. (Note) PART MARKING (k ) (C) (Pb-Free) DWG. ISL22102IV20Z* (No longer 22102 IVZ 18.5 -40 to +85 20 Ld TSSOP M20.173 available or supported) ISL22102IR20Z* 221 02IRZ 18.5 -40 to +85 20 Ld QFN L20.4x4C Block Diagram AVCC LEFT IN - 32-TAP LEFT OUT + LOG 2.5M 18.5k CB VB 2.5M 32-TAP - LOG RIGHT OUT + 18.5k GND RIGHT IN HPA HPB V TH AUDIO DETECT AND DELAY VCC CONTROL UNIT FLAG UP DN MUTE SB D0 D1 D2 FN6788 Rev 2.00 Page 2 of 12 September 21, 2015 - +