AMSCO DAC8

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
support@austriamicrosystems.com
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