DAC8420QBC AD [Analog Devices], DAC8420QBC Datasheet

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DAC8420QBC

Manufacturer Part Number
DAC8420QBC
Description
Quad 12-Bit Serial Voltage Output DAC
Manufacturer
AD [Analog Devices]
Datasheet
a
GENERAL DESCRIPTION
The DAC8420 is a quad, 12-bit voltage-output DAC with serial
digital interface, in a 16-pin package. Utilizing BiCMOS tech-
nology, this monolithic device features unusually high circuit
density and low power consumption. The simple, easy-to-use
serial digital input and fully buffered analog voltage outputs
require no external components to achieve specified performance.
The three-wire serial digital input is easily interfaced to micro-
processors running at 10 MHz rates, with minimal additional
circuitry. Each DAC is addressed individually by a 16-bit serial
word consisting of a 12-bit data word and an address header.
The user-programmable reset control CLR forces all four DAC
outputs to either zero or midscale, asynchronously overriding
the current DAC register values. The output voltage range, de-
termined by the inputs VREFHI and VREFLO, is set by the
user for positive or negative unipolar or bipolar signal swings
within the supplies allowing considerable design flexibility.
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
FEATURES
Guaranteed Monotonic Over Temperature
Excellent Matching Between DACs
Unipolar or Bipolar Operation
Buffered Voltage Outputs
High Speed Serial Digital Interface
Reset to Zero- or Center-Scale
Wide Supply Range, +5 V-Only to
Low Power Consumption (35 mW max)
Available in 16-Pin DIP and SOL Packages
APPLICATIONS
Software Controlled Calibration
Servo Controls
Process Control and Automation
ATE
15 V
The DAC8420 is available in 16-pin epoxy DIP, cerdip, and
wide-body SOL (small-outline surface mount) packages. Opera-
tion is specified with supplies ranging from +5 V-only to 15 V,
with references of +2.5 V to 10 V respectively. Power dissipa-
tion when operating from 15 V supplies is less than 255 mW
(max), and only 35 mW (max) with a +5 V supply.
For applications requiring product meeting MIL-STD-883,
contact your local sales office for the DAC8420/883 data sheet,
which specifies operation over the –55 C to +125 C tempera-
ture range.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
CLK
SDI
CS
NC
LD
10
12
13
14
11
GND
9
FUNCTIONAL BLOCK DIAGRAM
REGISTER
DECODE
SHIFT
CLSEL
16
Voltage Output DAC
CLR
15
2
Quad 12-Bit Serial
12
4
REG
REG
REG
REG
REG
A
A
B
C
D
VREFHI
DAC A
DAC B
DAC C
DAC D
5
VREFLO
4
DAC8420
VDD
VSS
1
8
Fax: 617/326-8703
7
6
3
2
VOUTA
VOUTB
VOUTC
VOUTD

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DAC8420QBC Summary of contents

Page 1

FEATURES Guaranteed Monotonic Over Temperature Excellent Matching Between DACs Unipolar or Bipolar Operation Buffered Voltage Outputs High Speed Serial Digital Interface Reset to Zero- or Center-Scale Wide Supply Range, +5 V-Only to Low Power Consumption (35 mW max) Available ...

Page 2

DAC8420–SPECIFICATIONS ELECTRICAL CHARACTERISTICS V = –5 –2.5 V, – VREFLO Parameter STATIC ACCURACY Integral Linearity “E” Integral Linearity “E” Integral Linearity “F” Integral Linearity “F” Differential Linearity Min-Scale Error Full-Scale Error Min-Scale Error ...

Page 3

ELECTRICAL CHARACTERISTICS V = –10.0 V, – +85 C unless otherwise noted. See Note 1 for supply variations.) VREFLO A Parameter STATIC ACCURACY Integral Linearity “E” Integral Linearity “F” Differential Linearity Min-Scale Error Full-Scale Error Min-Scale Tempco Full-Scale ...

Page 4

DAC8420 ( +15 WAFER TEST LIMITS unless otherwise noted) Parameter Symbol Integral Linearity INL Differential Linearity DNL Min-Scale Offset Max-Scale Offset Logic Input High Voltage V Logic Input Low Voltage V Logic Input Current I ...

Page 5

... Model 15 DAC8420EP 14 DAC8420EQ NC DAC8420ES 13 DUT DAC8420FP 12 DAC8420FQ 11 DAC8420FS 10 DAC8420QBC 9 NOTES 1 A complete /883 data sheet is available. For availability and burn-in informa- 10k tion, contact your local sales office. 2 PMI division letter designator. 3 Dice tested at +25 C only. –5– DAC8420 t CSH D4 D3 ...

Page 6

DAC8420 DIP 1 VDD 2 VOUTD 3 VOUTC 4 DAC8420 VREFLO TOP VIEW 5 VREFHI (Not to Scale) VOUTB 6 VOUTA 7 8 VSS CONNECT Power Supplies VDD: Positive Supply +15 V. VSS: Negative ...

Page 7

CLK CS LD CLR Don’t Care. ...

Page 8

DAC8420 DAC Data Word (HEX) FFF 801 800 7FF 000 Typical Performance Characteristics 0 +25° +15V –15V –10V VREFLO 0.1 0 –0.1 –0.2 –0.3 –6 –4 –2 0 ...

Page 9

V = +15V –15V +10V VREFHI V = –10V 0 VREFLO DAC A –0.1 DAC C DAC D –0.2 –0.3 DAC B –0.4 –0.5 –0.6 –75 –50 – ...

Page 10

DAC8420 +31.25mV +25° +15V –15V +10V VREFHI V = –10V VREFLO 4.88mV 1 LSB 0mV –18.75mV +10µs/DIV +90.2µs –9.8µs t ≈ 13µs SETT Figure 17. Settling Time (+)( ...

Page 11

VREFHI Input Requirements The DAC8420 utilizes a unique, patented DAC switch driver circuit which compensates for different supply, reference volt- age, and digital code inputs. This ensures that all DAC ladder switches are always biased equally, ensuring excellent linearity under ...

Page 12

DAC8420 single supply operation is obtained with the output load connected to ground, so the output stage does not have to sink current. Like all amplifiers, the DAC8420 output buffers do generate voltage noise, 52 nV/ Hz typically. This is ...

Page 13

For a single 5 V supply limited to at most 2.5 V, and VREFHI must always be at least 2.5 V less than the positive supply to ensure linearity of the device. For these applications, the REF43 is ...

Page 14

DAC8420 +5V SUPPLY REF-43 2 VIN 0.1µF 2. GND OUT 5 DAC A DAC-8420 DAC B DAC C DIGITAL CONTROL DAC GND DIGITAL INPUTS Figure 31. Dual Programmable Window ...

Page 15

DAC8420 to M68HC11 Interface Assembly Program * M68HC11 Register Definitions PORTC EQU $1003 Port C control register * “0,0,0,0;0,CLSEL,CLR,CS” DDRC EQU $1007 Port C data direction PORTD EQU $1008 Port D data register * “0,0,LD,SCLK;SDI,0,0,0” DDRD EQU $1009 Port D ...

Page 16

DAC8420 PIN 1 0.210 (5.33) MAX 0.160 (4.06) 0.115 (2.93) PIN 1 0.0118 (0.30) 0.0040 (0.10) 0.200 (5.08) 0.125 (3.18) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 16-Pin Epoxy DIP (P Suffix 0.280 (7.11) 0.240 (6.10) 1 ...

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