參數(shù)資料
型號： MAX5195EGM
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： DAC
英文描述： 14-Bit, 260Msps High-Dynamic Performance DAC
中文描述： PARALLEL, WORD INPUT LOADING, 14-BIT DAC, QCC48
封裝： 7 X 7 MM, 0.90 MM HEIGHT, QFN-48
文件頁數(shù)： 10/17頁
文件大?。?/td> 599K
代理商： MAX5195EGM
M
I
FS
= 64
I
REF
- (I
FS
/ 2
14
)
where I
REF
is the reference output current (I
REF
=
V
REFOUT
/R
SET
) and I
FS
is the full-scale current. R
SET
is
the reference resistor that determines the amplifier
’
s
output current (Figure 2) on the MAX5195. See Table 1
for a matrix of different I
FS
and R
SET
selections.
External Reference Operation
Figure 3 illustrates a low-impedance reference source
applied to the data converter for external reference
operation. REFIN allows an input voltage range of
1.196V ±8%. Use a fixed output voltage reference
source such as the 1.2V, 25ppm/
°
C (typ) MAX6520
bandgap reference for improved accuracy and drift
performance. Bypass the unused REFOUT pin of the
MAX5195 with a 1μF capacitor to AGND.
14-Bit, 260Msps High-Dynamic
Performance DAC
10
______________________________________________________________________________________
OUTP
OUTN
1.2V
REFERENCE
CURRENT-SOURCE
ARRAY
REFOUT
REFIN
RSET
NOTE:
CONNECT REFIN AND REFOUT TOGETHER FOR INTERNAL REFERENCE OPERATION.
AV
CC
I
REF
0.1
μ
F
1
μ
F
1.5
μ
F
3k
I
REF
= V
REFOUT
/R
SET
MAX5195
OUTP
OUTN
1.2V
REFERENCE
CURRENT-SOURCE
ARRAY
REFOUT
REFIN
RSET
AV
CC
I
REF
1
μ
F
1.5
μ
F
3k
I
REF
= V
REFOUT
/R
SET
AMPOUT
MAX6520
MAX5195
Figure 3. External Reference Configuration Using the MAX6520
R
SET
(k
)
FULL-SCALE CURRENT
I
FS
(mA)
10
12
14
16
18
20
*
Terminated into a 27.4
load (see Analog Outputs section for details) referenced to AVCC.
REFERENCE CURRENT
I
REF
(μA)
156.26
187.50
218.80
250.00
281.30
312.50
CALCULATED
7.68
6.40
5.49
4.80
4.27
3.84
1% EIA STD
7.50
6.34
5.49
4.75
4.22
3.83
OUTPUT VOLTAGE
V
OUTP/N
* (mV
P-P
)
500
600
700
800
900
1000
Table 1. I
FS
and R
SET
Selection Matrix Based on a Typical 1.2V Reference Voltage
Figure 2. Internal Reference Configuration
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