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| Analog Standard Cell DAC8 - 8-Bit Digital to Analog Converter DATA SHEET Process CUE (0.6 m) General Description This Macro Cell is an 8-Bit digital to analog converter. Key Features - Functional Description The architecture is based on two resistor dividers. Because of its high output impedance, which is also code dependent, it must be used together with a low offset operational amplifier at the output (e.g. OP03B). VRN and VRP must be within the common mode range of the opamp (e.g. between 1.5V and 3.5V). Full 8-Bit Resolution and Linearity Small Area 0.044 mm; Size x = 216m, y = 202m Supply Voltage 5V 10% Only Single Power Supply Required Symbol Pinlist Pin RP RN DACOUT b<7:0 Description Positive Reference Voltage Negative Reference Voltage Analog Output Data Input b(0) = LSB Cap. Revision A, 26.11.02 Page 1 of 3 Data Sheet DAC8 - CUX POWER SUPPLIES The converter requires one power supply (vdda, gnd). TECHNICAL DATA FOR 5V SUPPLY (Tjunction = 0 to +85 C, VDDA = 5V 10%, unless otherwise specified) GENERAL PARAMETERS Symbol Vin Parameter Resolution Input Voltage Range VRP = 3.5V VRN = 1.5V VDD = 5V temp = 25 C VRP = 3.5V VRN = 1.5V VDD = 5V temp = 25 C VRP = 3.5V VRN = 1.5V VDD = 5V temp = 25 C 5.9 4.5 Conditions Min 8 VSS VDD Typ Max Unit Bit V DNL Differential Nonlinearity 0.25 LSB INL Integral Nonlinearity 0.25 LSB Vos Input Offset Voltage 0.25 LSB Rref Vdd Idd PVdd Rout 1) 2) Reference Impedance Power Supply Range Power Supply Current Power Consumption Output Resistance 8 5.0 0.13 0.13 21 1) 1) 10.7 5.5 kOhms V mA mW kOhms 2) Vrefp - Vrefn = 1V Middle of the resistor string; Code: 0111 0111 (output resistance is code-dependent) Idd includes the current through the resistor string TRANSIENT PARAMETERS Symbol Ts Parameter Settling Time Conditions 5V, 25 C Cload = 30pF Min <1 Typ Max Unit s Vout = (VRP - VRN) / 256 * code_in + VRN Revision A, 26.11.02 Page 2 of 3 Data Sheet DAC8 - CUX Contact austriamicrosystems AG A 8141 Schloss Premstatten, Austria T. +43 (0) 3136 500 5333 F. +43 (0) 3136 525 5755 support@austriamicrosystems.com www.austriamicrosystems.com Copyright Copyright (c) 2002 austriamicrosystems. Trademarks registered (R). All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. To the best of its knowledge, austriamicrosystems asserts that the information contained in this publication is accurate and correct. Revision A, 26.11.02 Page 3 of 3 |
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