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WM2627CDT Datasheet(PDF) 1 Page - Wolfson Microelectronics plc |
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WM2627CDT Datasheet(HTML) 1 Page - Wolfson Microelectronics plc |
1 / 11 page WM2627 Quad 8-Bit Serial Input Voltage Output 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 • Four 8-bit voltage output DACs • Dual 2.7V to 5.5V supply (separate digital and analogue supplies) • DNL ±0.03 LSB, INL ±0.3 LSB typical • Low power consumption: - 3mW, slow mode - 3V supply - 9mW, fast mode - 3V supply • DSP and microprocessor compatible serial interface • Programmable settling time of 2.5µs or 8.5µs typical APPLICATIONS • Battery powered test instruments • Digital offset and gain adjustment • Battery operated/remote industrial controls • Machine and motion control devices • Wireless telephone and communication systems • Arbitrary waveform generation • Robotics ORDERING INFORMATION DEVICE TEMP. RANGE PACKAGE WM2627CDT 0° to 70°C 16-pin TSSOP WM2627IDT -40° to 85°C 16-pin TSSOP DESCRIPTION The WM2627 is a quadruple 8-bit voltage output, resistor string, digital-to-analogue converter. Each DAC can be individually powered down under software control. A hardware controlled mode is provided that powers down all DACs. Power down reduces current consumption to 1 µA. The device has been designed to interface efficiently to industry standard microprocessors and DSPs. It is programmed with a 16-bit serial word comprising of a DAC address, individual DAC control bits and an 8-bit value. The WM2627 has provision for two supplies: one supply for the serial interface (DVDD, DGND), and one for the DACs, reference buffers and output buffers (AVDD, AGND). This enables a typical application where the device can be controlled via a microprocessor operating on a 3V supply, with the DACs operating on a 5V supply. Alternatively, the supplies can be tied together in a single supply application. Excellent performance is delivered with a typical DNL of ±0.03 LSB. The settling time of the DAC is programmable to allow the designer to optimize speed versus power dissipation. The output stage is buffered by a x2 gain near rail-to-rail amplifier, which features a Class AB output stage. DACs A and B can have a different reference voltage to DACs C and D. The device is available in a 16-pin TSSOP package. Commercial temperature (0 ° to 70°C) and Industrial temperature (-40 ° to 85°C) variants are supported. BLOCK DIAGRAM TYPICAL PERFORMANCE (11) OUTD (12) OUTC (13) OUTB (14) OUTA 10-BIT DATA AND CONTROL HOLDING LATCH 8-BIT DAC LATCH 16-BIT SHIFT REGISTER AND CONTROL LOGIC REFINAB (15) POWER-ON RESET DIN (4) FS (7) SCLK (5) NCS (6) (9) AGND (8) DGND (3) NLDAC (2) NPD AVDD (16) DVDD (1) X2 DAC A DAC C DAC D POWERDOWN/ SPEED CONTROL WM2627 2-BIT CONTROL LATCH REFINCD (10) DAC B X1 DAC OUTPUT BUFFER data REFERENCE INPUT BUFFER AVDD = DVDD = 5V, VREF = 2.048V, Slow Mode -0.04 -0.03 -0.02 -0.01 0 0.01 0.02 0.03 0.04 0 32 64 96 128 160 192 224 256 DIGITAL CODE |
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