DAC8426 Analog Devices, DAC8426 Datasheet

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DAC8426

Manufacturer Part Number
DAC8426
Description
Quad 8-Bit Voltage Out CMOS DAC Complete with Internal 10V Reference
Manufacturer
Analog Devices
Datasheet

Specifications of DAC8426

Resolution (bits)
8bit
Dac Update Rate
333kSPS
Dac Settling Time
3µs
Max Pos Supply (v)
+16.5V
Single-supply
Yes
Dac Type
Voltage Out
Dac Input Format
Par

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
DAC8426F
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Part Number:
DAC8426FP
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Part Number:
DAC8426FSZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
a
REV. C
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.
GENERAL DESCRIPTION
The DAC8426 is a complete quad voltage output D/A converter
with internal reference. This product fits directly into any exist-
ing 7226 socket where the user currently has a 10 V external
reference. The external reference is no longer necessary. The
internal reference of the DAC8426 is laser-trimmed to 0.4%
FEATURES
No Adjustments Required, Total Error
Four Voltage-Output DACs on a Single Chip
Internal 10 V Bandgap Reference
Operates from Single
Fast 50 ns Data Load Time, All Temperatures
Pin-for-Pin Replacement for PM-7226 and AD7226,
APPLICATIONS
Process Controls
Multichannel Microprocessor Controlled:
Over Temperature
Eliminates External Reference
System Calibration
Op Amp Offset and Gain Adjust
Level and Threshold Setting
15 V Supply
1 LSB Max
FUNCTIONAL BLOCK DIAGRAM
Complete with Internal 10 V Reference
Quad 8-Bit Voltage Out CMOS DAC
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
offering a 25 ppm/ C temperature coefficient and 5 mA of exter-
nal load driving capability.
The DAC8426 contains four 8-bit voltage-output CMOS D/A
converters on a single chip. A 10 V output bandgap reference
sets the output full-scale voltage. The circuit also includes four
input latches and interface control logic.
One of the four latches, selected by the address inputs, is loaded
from the 8-bit data bus input when the write strobe is active
low. All digital inputs are TTL/CMOS (5 V) compatible. The
on-board amplifiers can drive up to 10 mA from either a single
or dual supply. The on-board reference that is always connected
to the internal DACs has 5 mA available to drive external devices.
Its compact size, low power, and economical cost-per-channel,
make the DAC8426 attractive for applications requiring mul-
tiple D/A converters without sacrificing circuit-board space. Sys-
tem reliability is also increased due to reduced parts count.
PMI’s advanced oxide-based, silicon-gate, CMOS process al-
lows the DAC8426’s analog and digital circuitry to be manufac-
tured on the same chip. This, coupled with PMI’s highly stable
thin-film R-2R resistor ladder, aids in matching and tempera-
ture tracking between DACs.
DAC8426
Fax: 617/326-8703

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DAC8426 Summary of contents

Page 1

... PMI’s advanced oxide-based, silicon-gate, CMOS process al- lows the DAC8426’s analog and digital circuitry to be manufac- tured on the same chip. This, coupled with PMI’s highly stable thin-film R-2R resistor ladder, aids in matching and tempera- ture tracking between DACs ...

Page 2

... Input Capacitance POWER SUPPLIES 4 Positive Supply Current 4 Negative Supply Current 5 Power Dissipation Power Supply Sensitivity ELECTRICAL CHARACTERISTICS DAC8426AR/BR – +85 C applies for DAC8426ER/EP/FR/FP/FS, unless otherwise noted. A Parameter DAC OUTPUT 3 Output Current (Source) 3 Output Current (Sink) Minimum Load Resistance 3 DYNAMIC PERFORMANCE ...

Page 3

... DAC8426ER 1 LSB DAC8426EP 1 LSB 2 DAC8426BR 2 LSB DAC8426FR 2 LSB DAC8426FP 2 LSB 3 DAC8426FS 2 LSB NOTES 1 Burn-in is available on commercial and industrial temperature range parts in cerdip, plastic DIP, and TO-can packages. 2 For devices processed in total compliance to MIL-STD-883, add /883 after part number. Consult factory for 883 data sheet. ...

Page 4

... ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the DAC8426 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality ...

Page 5

... Channel-to-Channel Matching (DACs Superimposed) Long Term Drift Accelerated by Burn-In Power Supply Current vs. Temperature REV. C Typical Performance Characteristics–DAC8426 Relative Accuracy vs. Code –55 C, +25 C, +125 C A (All Superimposed) V Noise Density vs. Frequency OUT PSRR vs. Frequency –5– Zero Code Error vs. Temperature ...

Page 6

... DAC8426–Typical Performance Characteristics V OUT Error from 10.000 V REF vs. Temperature V OUT Line Regulation vs. Temperature REF Output Impedance (V OUT) REF vs. Frequency V REF –6– V OUT Load Regulation REF vs. Temperature OUT Start Up REV. C ...

Page 7

... DACs being up- dated specified in nano-Volt-seconds (nVs). CIRCUIT DESCRIPTION The DAC8426 is a complete quad 8-bit D/A converter. It con- tains an internal bandgap reference, four voltage switched R-2R ladder DACs, four DAC latches, four output buffer amplifiers, and an address decoder. All four DACs share the internal ten volt reference and analog ground(AGND) ...

Page 8

... Settling Time Response (Positive Transition) Figure 3. Dynamic Response four output buffer amplifiers are connected to V the DAC8426 from dual supplies (V improves negative going output settling time near zero volts. When operating single supply (V output sink current decreases as the output approaches zero voltage ...

Page 9

... These tolerances provide the worst case analysis including tem- perature changes. REV. C One additional characteristic guaranteed is a DNL of 1 LSB on all grades. The DAC8426 is therefore guaranteed to be mon- is equal to the otonic. In the situation where a continuously positive 1 LSB OUT digital increment is applied, the output voltage will always in- crease in value, never decrease ...

Page 10

... DAC8426 ESD input protection diodes will forward bias if the applied input logic is at logic “1”. No damage will result to the input since the DAC8426 is designed to withstand mo- mentary currents 130 mA. This situation will likely exist for any DAC or ADC operating from a separate analog supply. 4. ESD input protection— ...

Page 11

... MICROPROCESSOR INTERFACING The DAC8426 easily interfaces to most 8- and 16-bit wide data- bus systems. Serial and 4-bit busses can also be accommodated with additional latches and control circuitry. Interfacing can be accomplished with databus transfers running with 50 ns write pulse widths. Examples of various microprocessor interface circuits are pro- vided in Figures 8 through 12 ...

Page 12

... DAC8426 0.200 (5.08) 0.200 (5.08) 0.125 (3.18) 0.210 (5.33) 0.160 (4.06) 0.115 (2.93) 0.0118 (0.30) 0.0040 (0.10) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 20-Pin Cerdip (Q-20) 0.005 (0.13) MIN 0.098 (2.49) MAX 20 11 0.310 (7.87) 0.220 (5.59 PIN 1 1.060 (26.92) MAX 0.060 (1.52) 0.015 (0.38) MAX 0.150 (3.81) MIN 0.023 (0.58) 0.100 0.070 (1.78) SEATING (2.54) PLANE 0.014 (0.36) 0.030 (0.76) BSC ...

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