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WM5628 데이터시트 PDF




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부품번호 WM5628 기능
기능 3 & 5V Octal 8-Bit Voltage Output DAC with Serial Interface
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WM5628 데이터시트, 핀배열, 회로
WM5628L, WM5628
Production Data
Sept. 1996 Rev 2
3 & 5V Octal 8-Bit Voltage Output DAC
with Serial Interface
Description
WM5628L and WM5628 are Octal 8-bit digital to analogue
converters (DAC) controlled via a serial interface. Each
DAC's output voltage range is programmable for either x1
or x 2 its reference input voltage, allowing near rail to rail
operation for the x 2 output range. High impedance
buffered voltage reference inputs are provided for each
group of four DACs. WM5628L operates on a single
supply voltage of 3 V while WM5628 operates on 5 V.
WM5628/L interfaces to all popular microcontrollers and
microprocessors via a three wire serial interface with CMOS
compatible, schmitt trigger, digital inputs. An 12 bit
command word comprises 3 DAC select bits, an output
range selection bit and 8-bits of data.
Individual or all DAC outputs are changed using
WM5628/L's double buffered DAC registers and the
separate LOAD and LDAC inputs. DAC outputs are
updated simultaneously by writing a complete set of new
values and then pulsing the LDAC input.
The DAC outputs are optimised for single supply
operation and driving ground referenced loads.
An internal power-on-reset function sets the DAC's input
codes to zero at power up.
Ideal in space critical applications WM5628/L is available
in wide-bodied and DIP packages for commercial (0oC to
70oC) and industrial (-40oC to 85oC) temperature ranges.
Pin Configuration
Features
• Eight 8-bit voltage output DAC's
• Three wire serial interface
• Programmable x1 or x 2 output range.
• Power-on-reset sets outputs to zero
• Buffered voltage reference inputs
• Simultaneous DAC output update
Key Specifications
• Single supply operation:
WM5628L : 3 V
WM5628 : 5 V
• 0 to 4 V output (x 2 output range) at 5 V VDD
• 0 to 2.5 V output (x 2 output range) at 3 V VDD
• Guaranteed monotonic output
Applications
• Programmable d.c. voltage sources
• Digitally controlled attenuator/amplifier
• Signal synthesis
• Mobile communications
• Automatic test equipment
• Process control
Ordering Information
Top View
16 pin N and DW packages
DACB
DACA
GND
Data
CLK
VDD
DACE
DACF
1
2
3
4
5
6
7
8
16 DACC
15 DACD
14 Ref1
13 LDAC
12 Load
11 Ref2
10 DACH
9 DAC G
DEVICE
TEMP. RANGE
WM5628CN
0oC to 70oC
WM5628CDW
WM5628IN
WM5628IDW
WM5628LCN
WM5628LCDW
WM5628LIN
WM5628LIDW
0oC to 70oC
-40oC to 85oC
-40oC to 85oC
0oC to 70oC
0oC to 70oC
-40oC to 85oC
-40oC to 85oC
PACKAGE
16 pin plastic DIP
16 pin wide-bodied plastic SO
16 pin plastic DIP
16 pin wide-bodied plastic SO
16 pin plastic DIP
16 pin wide-bodied plastic SO
16 pin plastic DIP
16 pin wide-bodied plastic SO
Production Data data sheets contain
final specifications current on publication
date. Supply of products conforms to
Wolfson Microelectronics standard terms
and conditions
Wolfson Microelectronics © 1996 Wolfson Microelectronics
Lutton Court, Bernard Terrace, Edinburgh EH8 9NX, UK
Tel: +44 (0) 131 667 9386 Fax: +44 (0) 131 667 5176
www: http://www.wolfson.co.uk




WM5628 pdf, 반도체, 판매, 대치품
WM5628L, WM5628
Electrical Characteristics: WM5628L
VDD = 3 .6V, GND = 0 V, VREF = 2 V x 1 gain, RL = 10 k, CL = 100 pF, TA = full range, unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
Power Supply
Supply current
IDD VDD = 3.3v
Static Accuracy
Resolution
Monotonicity
Differential Nonlinearity DNL
VREF = 1.25 V, Range x 2. (note 3)
Integral Nonlinearity INL
VREF = 1.25 V, Range x 2. (note 4)
Zero-code error
ZCE
VREF = 1.25 V, Range x 2. (note 5)
Zero-code error
Input code = 00 Hex (note 6)
temperature coefficient
Full scale error
FSE
VREF = 1.25 V, Range x 2. (note 8)
Full scale error
Input code = FF Hex (note 9)
temperature coefficient
Output sink current
IO(SINK)
Each DAC output
Output source current IO(SOURCE)
Power supply
IREF VDD = 3.3V, VREF = 1.5V
sensitivity
PSRR
MIN
8
8
0
20
1
TYP
± 1.0
10
± 60
± 25
0.5
MAX
4
± 0.9
30
UNIT
mA
Bits
Bits
LSB
LSB
mV
µV/OC
mV
µV/OC
µA
mA
mV/V
Electrical Characteristics: WM5628 & WM5628L
VDD = 2.7 to 5.5V, GND = 0 V, VREF = 2 V x 1 gain, RL = 10 k, CL = 100 pF, TA = full range, unless otherwise stated.
PARAMETER
Digital Inputs
High level input current
Low level input current
Input capacitance
Timing Parameters
Data input setup time
Data input hold time
CLK to Load
Load to CLK
Load duration
LDAC duration
Load to LDAC
Reference Inputs
Reference input
voltage
Reference input
capacitance
Reference
feedthrough
Channel to channel
isolation
SYMBOL
TEST CONDITIONS
IIH VI = VDD
IIL VI = 0V
CI
tSD
tHD
tHL
tSL
tWL
tWD
tLD
VREF A, B, C, D, inputs
A, B, C, D, inputs
A, B, C, D inputs (note 11)
A, B, C, D inputs (note 12)
MIN
50
50
50
50
250
250
0
GND
TYP
15
15
-60
-60
MAX UNIT
±10 µA
±10 µA
pF
ns
ns
ns
ns
ns
ns
ns
VDD-1.5 V
pF
dB
dB
4 Wolfson Microelectronics

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WM5628 전자부품, 판매, 대치품
WM5628L, WM5628
Typical Performance Characteristics (continued)
Typical DNL, INL and TUE * at VDD = 5 V (continued)
Inte gra l Nonline a rity
VDD = 5 V, Vref = 1.25 V, Ra nge x 2, TA = 25o C
0.4
0.2
0
-0.2
0
32 64 96 128 160 192 224 256
InputC ode
Typical DNL, INL and TUE at VDD = 3 V
Tota l Una d justed Error
VDD = 5 V, Vref = 1.25 V, Ra nge x 2, TA = 25oC
0.5
0.25
0
-0.25
-0.5
0
32 64 96 128 160 192 224 256
Input Code
0.2
0.1
0
-0.1
-0.2
0
Diffe re ntia l Nonlinea rity
VDD = 3 V, V re f = 1.25 V , Ra n g e x 2, TA = 25oC
32 64 96 128 160 192 224 256
Input Code
Integral Nonlinearity
VDD = 3 V, Vref = 1.25 V, Rang e x 2, TA = 25oC
0.5
0.2 5
0
-0.2 5
-0.5
0
32 64 96 128 160 192 224 256
Inp ut Code
Total Unadjusted Error
VDD = 3 V, Vref = 1.25 V, Rang e x 2, TA = 25o C
0.5
0.25
0
-0.25
-0.5
0
32 64 96 128 160 192 224 256
InputC ode
Output Source Current
vs Output Voltage
8
7
6
5
4 VDD = 5 V
TA= 25OC
3 Vref = 2 V
Range = x 2
2 Input code = 255
1
0
012345
V (V)
out
Supply Current vs
Temperature
2.4
2.2
2 Range = x 2
Input Code = 255
1.8
VDD = 5V
Vre f = 2V
VDD + 3V
1.6 Vref = 1.25V
1.4
-50
-25 0 25 50 75
Temperature ('oCC)
100
Wolfson Microelectronics
7

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