MAX5195EGM MAXIM [Maxim Integrated Products], MAX5195EGM Datasheet - Page 10

• Manufacturer Part Number: MAX5195EGM
• Description: 14-Bit, 260Msps High-Dynamic Performance DAC
• Manufacturer: MAXIM [Maxim Integrated Products]

14-Bit, 260Msps High-Dynamic
Performance DAC
Table 1. I
*Terminated into a 27.4Ω load (see Analog Outputs section for details) referenced to AV CC .
Figure 2. Internal Reference Configuration
Figure 3. External Reference Configuration Using the MAX6520
10
FULL-SCALE CURRENT
I
0.1µF
REF
NOTE: CONNECT REFIN AND REFOUT TOGETHER FOR INTERNAL REFERENCE OPERATION.
= V
______________________________________________________________________________________
REFOUT
1µF
/R
I
FS
SET
10
12
14
16
18
20
(mA)
MAX5195
FS
I
REF
REFOUT
REFIN
and R
RSET
MAX6520
1.5µF
SET
I
REF
REFERENCE
= V
1.2V
REFERENCE CURRENT
REFOUT
Selection Matrix Based on a Typical 1.2V Reference Voltage
/R
3kΩ
SET
1µF
I
REF
156.26
187.50
218.80
250.00
281.30
312.50
REFOUT
CURRENT-SOURCE
(µA)
I
REFIN
REF
RSET
ARRAY
AV
CC
REFERENCE
1.2V
1.5µF
OUTP
OUTN
CALCULATED
3kΩ
7.68
6.40
5.49
4.80
4.27
3.84
where I
V
the reference resistor that determines the amplifier’s
output current (Figure 2) on the MAX5195. See Table 1
for a matrix of different I
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.
REFOUT
AMPOUT
R
REF
SET
/R
CURRENT-SOURCE
SET
(kΩ)
I
is the reference output current (I
ARRAY
AV
FS
) and I
CC
= 64
1% EIA STD
External Reference Operation
7.50
6.34
5.49
4.75
4.22
3.83
FS
✕
MAX5195
I
FS
REF
is the full-scale current. R
and R
- (I
OUTN
OUTP
FS
SET
/ 2
OUTPUT VOLTAGE
V
14
selections.
OUTP/N
)
1000
500
600
700
800
900
* (mV
P-P
REF
SET
)
is
=