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DAC8228FPN/a18avaiDual 8-Bit CMOS D/A Converter with Voltage Output
DAC8228FPADN/a26avaiDual 8-Bit CMOS D/A Converter with Voltage Output
DAC8228FSN/a10avaiDual 8-Bit CMOS D/A Converter with Voltage Output


DAC8228FP ,Dual 8-Bit CMOS D/A Converter with Voltage OutputCHARACTERISTICS at vDD = MW :5%, vREF = ov, v2 = +2.5v and Vor, = +15V 15%,VHEF Ir. ov, v, = +5v_ ..
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DAC8228FP-DAC8228FS
Dual 8-Bit CMOS D/A Converter with Voltage Output
ANALOG
DEVICES
Dual 8-Bit CMOS
MI Converter with Voltage Output
FEATURES
. Two 8-Bit Voltage Out DACs in a Single Chip
. Fits 7528/7628 Sockets
. Adjustment Free Internal CMOS Op Amps
. Single +12V to +15V Operation
TTL Compatible Over Full VDD Range
Fast Interface Timing ....................................... Tw,, = sons
Improved Resistance to ESD
Available in Small Outline Package
CerDlP and Epoxy Packages Come in the Extended
Industrial Temperature Range of -40°C to +85°C
. Available in Die Form
APPLICATIONS
. Disk Drive Systems
- Automatic Test Equipment
. Process/Industrial Controls
. Energy Controls
. Programmable instrumentation
. Multi-Channei Microprccessor-Controiled Systems
. Servo Control Systems
ORDERING INFORMATION'
PACKAGE: 20-PIN mp/sm.
EXTENDED
INDUSTRIAL
RELATIVE GAIN TEMPERATURE
ACCU RACY ERROR M0'C to +85°C
21/2 LSB " LSB DAC8228FR
21/2 L88 " LSB DAC8228FP
11/2 L53 A LSB DA08228FS
t All commercial and industrial temperature range parts are available with burn-
FUNCTIONAL DIAGRAM vm,
I INPUT
1 BUFFER LATCH A
VE CONTROL LATCH a
- cs LOGIC
DAG A/DAC B
REV. A
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.
DACBZZB
The DAC-8228 is a dual e-bit. voltage output, CMOS, D/A con-
verterin asingle chip. itwas designed to drop into AD7528/7628
sockets eliminating two external op amps in applications such
as hard disk drives. These applications generally operate the
AD7528/7628 with zero volts applied to VREF and offset AGND
to +2.5 or +5 volts. The DAC-8228 is tested under both these
conditions.
The DAC-8228 can also be used in those applications requiring
a unipolar output voltage. it can deliver an output voltage be-
tween 0V and +10V with V = +14V (maximum output voltage
is VDD --4V). The DAC-8228's reference input can accept a
negative voltage from 0V to -10V (the DAC's internal unity-gain
inverting amplifier inverts the input signal). Choose the DAC-
8229 for bipolar operation.
Continued
PIN CONNECTIONS
20-PIN
0.3" CERDIP
(R-Suffix)
20-PIN SOL
(S-Suffix)
20-PIN
EPOXY DIP
(P-Suffix)
VitEFA
VOUT A
One Technology Way, PO. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700 Fax: 617/326-8703 wa: 710/394-6577
Telex: 924491 Cable: ANALOG NORWOODMASS
DA08228
GENERAL DESCRIPTION Continued
The DAC-8228 offers CerDIP and plastic packaged devices in
the extended industrial temperature range of -Aty'C to +85°C.
Applications requiring the military temperature range should
use the DAC-8229. To make the DAC-8229 pin and functionally
compatible with the DAC-8228, AGND A and AGND Bshould be
tied together to function as Vz, and Vss connected to GND.
The DAC-8228 consists of two CMOS voltage output amplifiers,
two high-accuracy R-2Fi resistor ladder networks, interface
control logic, and two 8-bit registers. An internal regulator main-
tains TTL logic compatibility and fast microprocessor interface
timing over the full VD D range.
The DAC-8228 dissipates only 90mW in the space saving 20-
pin 0.3" DIP or the 20-lead SO surface mount package. Its
compact size, low power, and economical cost per channel,
makes it attractive for applications requiring multiple D/A con-
verters without sacrificing circuit-board space. Reduced parts
count also improves system reliability.
Using PMi's advanced oxide-isolated, silicon-gate CMOS proc-
ess, coupled with its highly-stable thin-film resistor ladder, al-
lows the DAC-8228 to offer superior matching and temperature
tracking between DACs.
ABSOLUTE MAXIMUM RATINGS
(T, = +25°C, unless otherwise noted.)
VDDtoVz or GND ..._..i......t.rr.......i..r.F......... -th3V, +17V
I/z to GND .................i.......----F......r.. --0.3V, VDD
Digital Input Voltage to GND .. . -0.3V, I/m,
VREF A' VREF B to GND ..q............................._.............. -17V, v,
OUT A' VOUT Bto VZ (Note 1) ................................. -0.3V, VDD
Operating Temperature Range
FR/FP/FS Versions ...................................... -u10oC to +85°C
Junction Temperature .................................................. +150°C
Storage Temperature .................................... -E50C to +150°C
Lead Temperature (Soldering, 60 sec) ........................ +300°C
PACKAGE TYPE e,A (NOTE 3) lc UNITS
20-Pin Hermetic DIP (R) 76 11 ''C/W
20-Pin Plastic DIP (P) 69 27 "CM
ao-Pin SOL (S) 86 25 "thw
NOTES:
1. Outputs may be shorted to any terminal provided the package power dlsslpa-
tion is not exceeded. Typical output short-circuit current to GND is tiomA.
2. Use proper anti-static handling procedures when handling these devices.
3. 8A is specified tor worst case mounting conditions, I.e., e A is speclfied for
device in socket for CerDlP and P-DIP packages; 8'A is specified for device
soldered to printed circuit board tor SOL package.
ELECTRICAL CHARACTERISTICS at Vor, = MW :5%, v = ov, v2 = +2.5v and Vor, = +15v 15%, lass: = ov, Vz = +5v.
TA = Full Temperature Range specified under Absolute Maximum Ratings, unless otherwise noted.
DAC-8228
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
STATIC ACCURACY
(Note 1)
Resolution N 8 - - Bits
Relative Accuracy INL _ - 11 LSB
(Note 2)
Differential Nonlinearity DNL - - sl LSB
(Note 3)
Gain Error GFSE DAC Latches Loaded with 1111 1111 - - " LSB
Gain Error
Temperature Coefficient TOGFS - 20.0003 :0.002 %/"C
(Note 4)
Zero Code Error VZSE - - s15 mV
Zero Code Error T
Temperature CDeftityient TCst - =10 - wV/''C
(Note 4)
REFERENCE INPUT
(Note 8)
Input Resistance n Pin 4 and Pin 18 7 - 15 kc:
(Note 5) IN
Input Resistance Match AR‘N - $0.1 el %
(VREFANREFB) RIN
Input Capacitance
- 9 20 F
(Note 4) Cm p
V Input Resistance . .
it = V 2 - - k0
(Note 10) Rvz Digital Inputs 0
REV. A
DAC8228
ELECTRICAL CHARACTERISTICS at Vor, = +12V :5%, vREF = OV, vZ = +2.5v and Vor, = +15V :5%. vREF = OV, v2 = +5v.
T, = Full Temperature Range specified under Absolute Maximum Ratings, unless otherwise noted. Continued
DAC-8228
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DIGITAL INPUTS
Digital Input High VINH 2.4 - _ V
Digital Input Low INL - - 0.8 V
Input Current IIN VIN = 0V or VDD - - 11 pA
Input Capacitance
- 4 8 F
(Note 4) CIN p
POWER SUPPLIES
Supply Current
I - - 7 A
(Note 6) DD m
VD D -- +12V _ - 84
Power 12 x 7mA
_ . . P mW
Dissipation n VD D = +15V - - 105
15 X 7mA
DC Power Supply
Rejection Ratio PSRR AVDD = i5% - - OO" %/%
(AGain/AVD o)
DYNAMIC PERFORMANCE
Slew Rate (voor) TA = +25°C
- 2. - W
(Note 4) SR Digital Inputs = 0V to +5V 5 ”5
Settling Tirre (VOUT)
Positive or Negative ts Digital Inputs = 0V to +5V - 2 5 us
(Note 4, 7)
T = +25°c
Channel-to-Channel A
A V A - - - B
Isolation (Note 4) CCI VREFB to VOUT or SE}: to VOUTB 80 d
VREFB -- VREFA = 20 p p © f = 10kHz
T = +25°C
03113923833“ Q For Code Transition - 4 10 nVS
' 00000000to11111111
T = +25%: I
D: . I Ch A
Isilfctiofge O For Code Transition - 100 - nVs
I 00000000t011111111
AC Feedthrough
FT - - -70 dB
(Notes 4, 1 1)
T = 2 cC
Harmonic Distortion THD A + 5 - -85 - dB
VIN: GVRMS@f=1kHz
REV. A
M08228
ELECTRICAL CHARACTERISTICS at VDD = +12V i5%, VREF = OV, I/z = +2.5V and VDD = +15V i5%, VREF = 0V, VZ = +5V.
T, = Full Temperature Range specified under Absolute Maximum Ratings, unless otherwise noted. Continued
DAC-8228
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SWITCHING CHARACTERISTICS (Note 4)
Chip Select to
60 - -
Write Se1-Up Time tcs ns
Chip Select to
Write Hold Time tcr, 10 - - ns
DAC Select to
60 - -
Write Set-Up Time tAS ns
DAC Select to t 10 - - ns
Write Hold Time AH
Data Valid to
Write Set-Up Time trys 60 - - ns
Data Valid to t 10 - - ns
Write Hold Time DH
Write Pulse Width tw R 50 - - ns
NOTES:
Specifications apply to both DAC A and DAC B.
This is an endpoint linearity specification,
All devices are guaranteed to be monotonic overthe full operating temperature
range.
These characteristics are for design guidance only and not subject to produc-
tion test.
. Input resistance temperature coefficient = +300ppm/°C.
. VIN = VINLor VINH: outputs unloaded.
REF = -c2,5V; to where output sellles lo 11/2 LSB.
BURN-IN CIRCUIT
DACA1228
NOTES:
1. c. = mgr
2. C2 = mur
i=V -4V.
. VREF vpliage range is 0V to -10V; the absolute maximum negative value is:
. Digital crosstalk is a measure of the amourt oi digital input pulse appearing at
the analog output of the unselected DAC whwle applying it to the digital inpuxs
of the other DAC.
Resistance looking into the Vz terminal.
REFA, VREFB = 20V _ Sinewave © f = 10kHz; V
REFAtoV
VOUTB. both DAC latches loaded with 0000 0000.
Aorv Bto
REV. A
Illi08228
DICE CHARACTERISTICS
1. AMPLIFIER REFERENCE (V2) 11. DIGITAL INPUT DB,
2. N. C. 12. DIGITAL INPUT DB,
3. VOLTAGE OUTPUT (V0 UTA) 13. DIGITAL INPUT DB,
4. DACA REFERENCE |NA)PUT(VREF 14. DIGITALINPUT Gl o(LSB)
5. GROUND (GND) 15. CHIP SELECT ia7'
6. DAC SELECTION (DAC A/DAC B) 16. WRITE (WA)
7. DIGITAL INPUT DB, (MSB) 17. POSITIVE POWER SUPPLY (VDD)
8. DIGITAL INPUT D86 18. DAC B REFERENCE INPUT (VREFB)
. . 9. DIGITAL INPUT DB5 19. VOLTAGE OUTPUT (VOUTB )
iiiiiiiiTtiiiitiiiiii7sa, IO. DIGITAL INPUT DB, 20. N. C.
, R@iiilg-ga& m,
‘ Substrate (die backside) is internally connected to VDD.
DIE SIZE 0.082x it'',','"'.,,',':', 9,102 sq. mils
(2.08 x 2.82 mm, 5.87 sq. mm)
WAFER TEST LIMITS at VDD = v, = +12v ei%, VREF = OV, v2 = 2.5V or vDD = +15V ce5%, vREF = ov, v2 = +5v, T, = +25°C.
DAC-8228GBC
PARAMETER SYMBOL CONDITIONS LIMITS UNITS
Relative Accu racy ' . .
(Note 3) INL Endpoint Linearity Error 11 LSB MAX
Differential Nonlinearity
(Notes1,3) DNL :1 LSB MAX
Gain Error GFSE DAC Latmes Loaded with 1111 1111 L2 LSB MAX
Zero Code Error Vzse :15 mV MAX
Input Resistance I - RIN Pad 4 and 18 7/15 kQ MIN/kQ MAX
VREFA/VREFB Input ARM Ct
Resistance Match 'TN" 1 '/o MAX
V Input Resistance ' .
(Note 3) Rv7 Digital Inputs - 0V 2 k9 MIN
Digital Input High VIH 2.4 V MIN
Digital Inout Low IL 0.8 V MAX
InputCurrent IIN Vo--0V orVDD url uA MAX
DC Supply Rejection - o fl ,0
(AGain/AVDD) PSRR VDD_i5/o 0.01 /o/ /0 MAX
Positive Supply Current
(Note 2) loo 7 mA MAX
NOTES:
1. All dice guaranteed monolonic over the full operating temperature rarge.
2. VW = VINL or VINH; output unloaded.
3. Resistance looking into the VZ terminal.
Electrical tests are performed at wafer probe to the limits shown. Due to variations in assembly methods and normal yield loss, yield after packaging is not guaranteed for
standard product dice. Consult factory to negotiate specifications based on dice lot qualifications through sample lot assembly and testing.
REV, A
ic,good price


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