DS1881 Rev 0 1/06 Dual NV Audio Taper Digital Potentiometer General Description Features Dual, Audio Log Taper Potentiometers The DS1881 is a dual, nonvolatile (NV) digital poten- tiometer designed to operate in audio systems that Low THD+N and Crosstalk require 5V signal levels. The potentiometer settings can 5V Analog Supply (Independent of Digital Supply) be stored in EEPROM so that they are retained when the 3V to 5V Digital Supply Range power is cycled. The DS1881 has separate supplies for the potentiometers (V ) and the communication circuit- Potentiometer Settings Configurable as NV CC ry (V ). For clickless/popless operation, a zero-crossing or Volatile DD detector allows the wiper position to change when there Zero-Crossing Detector Eliminates Switching is no voltage across the potentiometer. The device is Noise also designed to minimize crosstalk, and the two digital Two User-Configurable Attenuation Options potentiometers provide 0.5dB channel-to-channel match- Configuration Option 1: 63 Positions Provide 1dB ing to prevent volume differences between channels. Attenuation Steps from 0dB to -62dB Plus Mute Total harmonic distortion (THD) is also minimal as long as the wiper drives a high-impedance load. Configuration Option 2: (Software-Compatible with the DS1808): 33 Positions Plus Mute as Two attenuation configuration options provide optimum Follows flexibility for the specific application. Configuration Positions 012: 1dB per Step for 12 Steps Option 1 provides 63 logarithmic tapered steps (0dB to Positions 1324: 2dB per Step for 12 Steps -62dB, 1dB/step) plus a mute setting. Configuration Positions 2532: 3dB per Step for 8 Steps Option 2 has 32 logarithmic steps plus mute and pro- 2 I C-Compatible Serial Interface vides software compatibility with the DS1808. When Configuration Option 2 is used in combination with the Three Address Pins Allow Up to 8 Devices on 2 I C Bus 16-pin SO package, the DS1881 is both software and pin compatible with the DS1808 in 5V applications. 45k Potentiometer End-to-End Resistance Industrial Temperature Range (-40C to +85C) Applications 16-Pin TSSOP or SO Package Notebook and PC Audio Portable Audio Equipment Ordering Information Car Stereo Consumer Audio/Video TEMP VERSION PIN- PART RANGE (k ) PACKAGE Pin Configuration 16 TSSOP DS1881E-050+ -40C to +85C 45 (173 mils) TOP VIEW + 16 TSS O P GND 1 16 V DD DS1881E-050+T&R -40C to +85C 45 ( 173 mi l s) A2 2 15 V CC Tap e- and - Reel A1 3 14 SCL 16 SO DS1881Z-050+ -40C to +85C 45 N.C. 4 13 SDA DS1881 ( 150 mi l s) A0 5 12 CE 16 SO W0 6 11 W1 DS1881Z-050+T&R -40C to +85C 45 ( 150 mi l s) Tap e- and - Reel L0 7 10 H1 H08L91 +Denotes lead-free package. TSSOP/SO Typical Operating Circuit appears at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.Dual NV Audio Taper Digital Potentiometer ABSOLUTE MAXIMUM RATINGS Voltage on V , SDA, and SCL Relative to GND .....-0.5V to +6.0V Maximum Resistor Current .................................................3mA DD Voltage on A2, A1, A0, and CE Relative Operating Temperature Range ...........................-40C to +85C to GND.................-0.5V to (V + 0.5V), not to exceed +6.0V Programming Temperature Range .........................0C to +70C DD Voltage on V Relative to GND...........................-0.5V to +6.0V Storage Temperature Range .............................-55C to +125C CC Voltage on H1, H0, W1, W0, L1, and L0 Relative Soldering Temperature...................See J-STD-020 Specification to GND...............................................................-0.5V to +6.0V Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. RECOMMENDED OPERATING CONDITIONS (T = -40C to +85C) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V Digital Supply Voltage (Notes 1, 2) 2.7 5.5 V DD V Analog Supply Range CC (Notes 1, 2) 4.5 5.5 V Potentiometer Voltages 0 5.5 V Wiper Current 1 mA DC ELECTRICAL CHARACTERISTICS (V = +2.7V to +5.5V, V = +4.5V to +5.5V, T = -40C to +85C.) DD CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Digital Supply Current I (Note 3) 200 250 A DD Analog Supply Current I (Note 4) 0.9 5 A CC Input Logic 0 0.3x V (Note 5) -0.3 V IL (CE, SDA, SCL, A0, A1, A2) V DD Input Logic 1 0.7 x V + DD V (Note 5) V IH (CE, SDA, SCL, A0, A1, A2) V 0.3 DD I = 4mA 0.4 OL Output-Voltage Low (SDA) V V OL I = 6mA 0.6 OL Input Leakage Current I -1 +1 A LI I/O Pin Input Current (SDA) 0.4V < V < (0.9 x V ) -10 +10 A SDA CC I/O Capacitance C (Note 6) 10 pF I/O Power-Up Time t 1ms PU 2 DS1881