max5331ucb-td Maxim Integrated Products, Inc., max5331ucb-td Datasheet - Page 9

• Manufacturer Part Number: max5331ucb-td
• Description: 12-bit Dacs With 32-channel Sample-and-hold Outputs
• Manufacturer: Maxim Integrated Products, Inc.

The MAX5331/MAX5332/MAX5333 contain 32 buffered
SHA circuits with internal hold capacitors. Internal hold
capacitors minimize leakage current, dielectric absorp-
tion, feedthrough, and required board space. The
MAX5331/MAX5332/MAX5333 provide a very low
1µV/ms droop rate.
The MAX5331/MAX5332/MAX5333 include output buffers
on each channel. The devices contain output resistors in
series with the buffer output (Figure 3) for ease of output
filtering and capacitive load driving stability.
Output loads increase the analog supply current (I
and I
increases power dissipation. Do not exceed the maxi-
mum power dissipation specified in the Absolute
Maximum Ratings.
Figure 2. Serial-Interface Timing Diagram
Table 1. Code Table
SCLK
DIN
CS
SS
MSB
). Excessively loading the outputs drastically
DAC INPUT CODE
1100 0111 0101
1000 0000 0000
0100 1111 0011
0010 1000 0010
1111 1111 1111
0000 0000 0000
t
CSHO
_______________________________________________________________________________________
Sample-and-Hold Amplifiers
LSB
t
CSSO
Detailed Description
t
DS
B23
t
DH
t
CH
NOMINAL OUTPUT
t
VOLTAGE (V)
CL
B22
-4.0535
9.0503
6.15
-2.0
2.5
12-Bit DACs with 32-Channel
0
Output
DD
Sample-and-Hold Outputs
The maximum output voltage range depends on the
analog supply voltages available and the output clamp
voltages (see the Output Clamp section):
The devices have a fixed theoretical output range
determined by the reference voltage, gain, and mid-
scale offset. The output voltage for a given input code
is calculated as follows:
where code is the decimal value of the DAC input
code, V
voltage at the ground-sense input. With a 2.5V refer-
ence, the nominal end points are -4.0535V and
+9.0503V (Table 1). Note that these are “virtual” internal
end-point voltages and cannot be reached with all
Full-scale output.
Maximum output with V
Midscale output.
V
Minimum output with V
Zero-scale output.
OUT_
(
REF
= 0. All outputs default to this code after power-up.
V
V
SS
OUT
B0
is the reference voltage, and V
+
_
0 75
(
.
1 6214
=
t
.
CSH1



V
code
4096
)
t
CSS1
≤
SS
V
DD
V
REF
×
OUT
= -2.75V.

 ×

= 8.55V.
V
= +2.5V
REF
_
V
≤
REF
(
)
V
+
DD
×
V
-
GS
5 2428
2 4
.
.
V
)
GS
-
is the
9