Analog Standard Cell DAC8 – 8-Bit Digital to Analog Converter DATA SHEET Process General Description CUE (0.6µ m) This Macro Cell is an 8-Bit digital to analog converter. Key Features Functional Description - Full 8-Bit Resolution and Linearity Small Area 0.044 mm²; - Size x = 216µm, y = 202µm - Supply Voltage 5V ± 10% Only Single Power Supply Required - - Symbol Revision A, 26.11.02 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). Pinlist Pin Description RP Positive Reference Voltage RN Negative Reference Voltage DACOUT Analog Output b<7:0 Data Input b(0) = LSB Cap. Page 1 of 3 Data Sheet DAC8 - CUX POWER SUPPLIES TECHNICAL DATA FOR 5V SUPPLY The converter requires one power supply (vdda, gnd). (T junction = 0 to +85° C, VDDA = 5V ± 10%, unless otherwise specified) GENERAL PARAMETERS Symbol Parameter Resolution 8 Vin Input Voltage Range VSS Typ Max Unit Bit VDD V Differential Nonlinearity ± 0.25 LSB Integral Nonlinearity VRP = 3.5V VRN = 1.5V VDD = 5V temp = 25° C ± 0.25 LSB Vos Input Offset Voltage VRP = 3.5V VRN = 1.5V VDD = 5V temp = 25° C ± 0.25 LSB Rref Reference Impedance 5.9 8 10.7 kOhms Vdd Power Supply Range 4.5 5.0 5.5 V INL 2) Min VRP = 3.5V VRN = 1.5V VDD = 5V temp = 25° C DNL 1) Conditions Idd Power Supply Current 0.13 1) PVdd Power Consumption 0.13 1) Rout Output Resistance 21 2) mA mW kOhms 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 Parameter Conditions Min Ts Settling Time 5V, 25° C C load = 30pF <1 Typ Max Unit µs Vout = (VRP – VRN) / 256 * code_in + VRN Revision A, 26.11.02 Page 2 of 3 Data Sheet DAC8 - CUX Contact Copyright austriamicrosystems AG A 8141 Schloss Premstätten, Austria T. +43 (0) 3136 500 5333 F. +43 (0) 3136 525 5755 [email protected] www.austriamicrosystems.com Copyright © 2002 austriamicrosystems. Trademarks registered ®. 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