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WM2625CD Datasheet(PDF) 1 Page - Wolfson Microelectronics plc |
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WM2625CD Datasheet(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 9 page  WM2625 Low Power Dual 8-bit Serial Input DAC Production Data, April 2001, Rev. 1.0 WOLFSON MICROELECTRONICS LTD Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK Tel: +44 (0) 131 667 9386 Fax: +44 (0) 131 667 5176 Email: sales@wolfson.co.uk www.wolfsonmicro.com Production Data Datasheets contain final specifications current on publication date. Supply of products conforms to Wolfson Microelectronics’ Terms and conditions. 2001 Wolfson Microelectronics Ltd . FEATURES • Dual 8-bit voltage output DAC • Single supply from 2.7V to 5.5V • Low supply current - 0.8mA typical in slow mode - 1.8mA typical in fast mode • DNL ±0.2 LSB, INL ±0.5 LSB (max) • Monotonic over temperature • DSP compatible serial interface • Programmable settling time of 1µs or 3µs typical • High impedance reference input buffer APPLICATIONS • Digital servo control loops • Industrial process control • Battery powered instruments and controls • Machine and motion control devices • Digital offset and gain adjustment ORDERING INFORMATION DEVICE TEMP. RANGE PACKAGE WM2625CD 0° to 70°C 8-pin SOIC WM2625ID -40° to 85°C 8-pin SOIC DESCRIPTION The WM2625 is a dual 8-bit voltage output, resistor string digital-to-analogue converter. It can operate with supply voltages between 2.7V and 5.5V and can be powered down under software control. Power down reduces current consumption to 1 µA. The device has been designed for glueless interface to industry standard microprocessors and DSPs. The WM2625 is programmed with a 16-bit serial word including 4 control bits and 8 data bits. Excellent performance is delivered with a typical DNL of 0.2LSBs. Monotonicity is guaranteed over the operating temperature range. The settling time of the DAC is programmable to allow for optimisation of speed versus power dissipation. The analogue output is buffered by a rail-to-rail amplifier with a gain of two and a Class AB output stage. The reference voltage input features a high impedance buffer which eliminates the need to keep the reference source impedance low. The WM2625 is available in an 8-pin SOIC package. Commercial (0 ° to 70°C) and Industrial (-40° to 85°C) temperature range variants are available. BLOCK DIAGRAM TYPICAL PERFORMANCE WM2625 SERIAL INTERFACE AND CONTROL LOGIC POWER- DOWN AND SPEED CONTROL X1 X1 X2 X2 REF DIN SCLK NCS OUTA OUTB 8 8 2 VDD GND DAC DAC VDD = 5V, VREF = 2.048V, Speed = Fast Mode, TA = 25.5 OC -0.1 -0.08 -0.06 -0.04 -0.02 0 0.02 0.04 0.06 0.08 0.1 0 326496 128 160 192 224 256 DIGITAL CODE |
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