AD7225LNZ Analog Devices Inc, AD7225LNZ Datasheet - Page 20
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AD7225LNZ
Manufacturer Part Number
AD7225LNZ
Description
IC DAC 8BIT LC2MOS QUAD 24-DIP
Manufacturer
Analog Devices Inc
Datasheet
1.AD7225CRSZ.pdf
(24 pages)
Specifications of AD7225LNZ
Settling Time
4µs
Number Of Bits
8
Number Of Converters
4
Voltage Supply Source
Dual ±
Power Dissipation (max)
500mW
Operating Temperature
-40°C ~ 85°C
Mounting Type
Through Hole
Package / Case
24-DIP (0.300", 7.62mm)
Resolution (bits)
8bit
Sampling Rate
200kSPS
Input Channel Type
Parallel
Supply Current
10mA
Digital Ic Case Style
DIP
No. Of Pins
24
Data Interface
CMOS, Parallel, TTL
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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AD7225
V
Operating the AD7225 from dual supplies results in enhanced
performance over single-supply operation on a number of
parameters as previously outlined. Some applications may
require this enhanced performance, but may only have a single
power supply rail available. The circuit of Figure 29 shows a
method of generating a negative voltage using one CD4049,
operated from a V
chip are used as an oscillator. The other four inverters are in
parallel and used as buffers for higher output current. The
square wave output is level translated to a negative-going signal,
then rectified and filtered. The circuit configuration shown
provides an output voltage of −5.1 V for current loadings in the
range of 0.5 mA to 9 mA. This satisfies the AD7225 I
ment over the commercial operating temperature range.
SS
GENERATION
DD
of 15 V. Two inverters of the hex inverter
SS
require-
Rev. C | Page 20 of 24
CD4049AE
510kΩ
1/6
5.1kΩ
CD4049AE
0.02µF
1/6
Figure 29. V
CD4049AE
CD4049AE
CD4049AE
CD4049AE
1/6
1/6
1/6
1/6
SS
Generation Circuit
1N4001
47µF
+
1N4001
+
510Ω
47µF
5V1
–V
OUT