ISL22102

32 Tap Dual, Audio, Push-button Controlled Potentiometer (XDCP™)

Product Status: Mass Production

OVERVIEW

The ISL22102 integrates two digitally controlled potentiometers (DCP) with buffered wiper outputs and an internal bias voltage generator (VB) on a monolithic CMOS integrated circuit. The wiper position is adjusted by the user through simple Up and Down push buttons, ideal for stereo volume control in audio applications.

Each potentiometer is implemented using 31 polysilicon resistors in a logarithmic array. Between each of the resistors are tap points connected to the wiper terminal through switches. When powered up, the wipers are reset to the -20dB position.

In addition to the ISL22102's low noise design, the ISL22102 also contains a zero-crossing detection circuitry to further minimize click and pop noise during volume transition. The internal VB generator of the ISL22102 provides a precision middle scale voltage reference that reduces external circuitry and simplifies application design.

The ISL22102 implements two power saving techniques for power critical applications. It is a Standby Mode that can be enabled to reduce the power consumption of the part when DCP is not in use. The part also has an Audio Detection circuitry that provides an indication FLAG to external devices and services. The FLAG can be delayed through D0, D1 and D2 pin configuration. By connecting the FLAG to the standby pin (SB ), it will automatically put the part into Standby Mode.

KEY FEATURES

  • Dual Audio Control - Two 32 Taps Log Pots
  • Buffered Wiper Outputs
  • Audio Detection with Threshold Input and Controlled Delay
  • Zero Amplitude Wiper Switching (ZAWS)
  • Simple Push-button Interface
  • Auto Increment/decrement After 1s Button Press
  • Standby Mode
  • Mute Function
  • Total Resistance: 18.5kΩ each DCP (Typical)
  • Voltage Operation
  • VCC = 2.7V to 5.5V
  • AVCC = 2.7V to 5.5V
  • Temp Range = -40°C to +85°C
  • Package Options
  • 20 Ld TSSOP
  • 20 Ld QFN
  • Pb-Free (RoHS Compliant) Audio Performance
  • 0dB to -72dB Volume Control
  • -90dB Mute
  • SNR: -90dB
  • THD+N: 0.01% @ 1kHz
  • Crosstalk Rejection: -100dB @ 1kHz
  • Channel-to-Channel Variation: ±0.1dB
  • Mid point 3dB-Cutoff: 100kHz

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL22102
Basic Information
生产状态
Mass Production
器件/通道数量
2
抽头数量
32
内存类型
Volatile
总线/输出接口
Pushbutton
阻抗选项 (kΩ)
18.5
供电电压Vcc (最小值) (V)
2.7
供电电压Vcc (最大值) (V)
5.5
供电电流Icc
395 µA
阻抗变化特性
Logarithmic
VL最小终端电压
0 V
VL最大终端电压
5.5 V
Wiper电流 (mA)
15
Wiper电阻 (Ω)
25
双电源范围 (V)
2.7 to 5.5
最高工作温度
85 °C
端到端温度系数 (ppm/øC)
340
中点比率温度系数
10
资质级别
Standard
单电源范围 (V)
0 to 5.5
供电电压Vcc范围 (V)
2.7 to 5.5
CAN 采样
YES
温度范围
-40 to +85

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