AD7398BR Analog Devices Inc, AD7398BR Datasheet - Page 19
![no-image](/images/manufacturer_photos/0/0/57/analog_devices_inc_sml.jpg)
AD7398BR
Manufacturer Part Number
AD7398BR
Description
D/A Converter (D-A) IC
Manufacturer
Analog Devices Inc
Datasheet
1.AD7399BRUZ.pdf
(24 pages)
Specifications of AD7398BR
Resolution (bits)
12bit
Digital Ic Case Style
SOIC
No. Of Pins
16
Operating Temperature Range
-40°C To +125°C
Update Rate
0.167MSPS
Mounting Type
Surface Mount
Peak Reflow Compatible (260 C)
No
Rohs Status
RoHS non-compliant
Settling Time
6µs
Number Of Bits
12
Data Interface
Serial
Number Of Converters
4
Voltage Supply Source
Dual ±
Power Dissipation (max)
16mW
Operating Temperature
-40°C ~ 125°C
Package / Case
16-SOIC (0.300", 7.5mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD7398BR
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Part Number:
AD7398BRUZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Company:
Part Number:
AD7398BRZ
Manufacturer:
Analog Devices Inc
Quantity:
135
Part Number:
AD7398BRZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
PROGRAMMABLE DAC REFERENCE VOLTAGE
With the flexibility of the AD7398/AD7399, one of the internal
DACs can be used to control a common programmable V
for the remainder of the DACs.
The circuit configuration is shown in Figure 37. The relationship of
V
R1 and R2, and is given by
where:
D = decimal equivalent of input code.
N = number of bits.
V
V
REF
REFX
REFX
= applied external reference.
V
V
= reference voltage for DAC A to DAC D.
to V
REFX
REFX
REF
=
=
V
is dependent upon the digital code and the ratio of
V
REF
REF
1
+
×
×
2
D
+
+
N
1
1
×
R
R
R
R
R
R
2
1
2
1
2
1
−
V
REFX
×
2
D
N
×
R
R
2
1
DAC A
DAC B
DAC C
DAC D
V
V
V
V
REF
REF
REF
REF
AD7398/AD7399
A
B
C
D
Figure 37. Programmable DAC Reference
REFX
Rev. C | Page 19 of 24
(4)
(5)
V
V
V
V
OUT
OUT
OUT
OUT
A
B
C
D
VIN
Table 7. V
R1, R2
R1 = R2
R1 = R2
R1 = R2
R1 = 3R2
R1 = 3R2
R1 = 3R2
The accuracy of V
Therefore, tight tolerance, low tempco, thin film resistors
should be used.
R1 ±0.1%
TO OTHER
COMPONENTS
ADR293
R2 ±0.1%
REFX
V
REF
vs. R1 and R2
REFX
Digital Code
0000 0000 0000
1000 0000 0000
1111 1111 1111
0000 0000 0000
1000 0000 0000
1111 1111 1111
is affected by the quality of R1 and R2.
AD7398/AD7399
V
2 V
1.3 V
V
4 V
1.6 V
V
REF
REF
REFX
REF
REF
REF
REF