參數(shù)資料
型號： MAX5235
廠商： Maxim Integrated Products, Inc.
英文描述： Single-Supply 3V/5V, Voltage-Output, Dual, Precision 12-Bit DACs
中文描述： 單電源、3V/5V、電壓輸出、雙路、高精度12位DAC
文件頁數(shù)： 10/19頁
文件大?。?/td> 565K
代理商： MAX5235
M
Detailed Description
The MAX5234/MAX5235 12-bit, voltage-output DACs
are easily configured with a 3-wire SPI, QSPI,
MICROWIRE serial interface. The devices include a 16-
bit data-in/data-out shift register and have an input con-
sisting of an input register and a DAC register. In
addition, these devices employ precision trimmed inter-
nal resistors to produce a gain of 1.6384V/V, maximizing
the output voltage swing, and a programmable shut-
down output impedance of 1k
or 200k
. The full-scale
output voltage is 4.095V for the MAX5235 and 2.0475V
for the MAX5234. These devices produce a weighted
output voltage proportional to the digital input code with
an inverted rail-to-rail ladder network (Figure 3).
External Reference
The reference inputs accept both AC and DC values
with a voltage range extending from 0.25V to 2.6V for
the MAX5235 and 0.25V to 1.5V for the MAX5234. For
proper operation
do not
exceed the input voltage
range limits. Determine the output voltage using the fol-
lowing equation:
V
OUT
_ = (V
REF
_ x NB / 4096) x 1.6384V/V
where NB is the numeric value of the DACs binary input
code (0 to 4095), V
REF
_ is the reference voltage, and
1.6384V/V is the gain of the internal output amplifier.
The code-dependent reference input impedance
ranges from a minimum of 28k
to several G
at code
0. The code-dependent reference input capacitance is
typically 23pF.
Output Amplifier
The output amplifiers have internal resistors that pro-
vide for a gain of 1.6384V/V. These trimmed resistors
minimize gain error. The output amplifiers have a typi-
cal slew rate of 0.6V/μs and settle to 1/2LSB within 10μs
(typ) with a load of 5k
in parallel with 100pF. Use the
serial interface to set the shutdown output impedance
of the amplifiers to 1k
or 200k
.
Single-Supply 3V/5V, Voltage-Output, Dual,
Precision 12-Bit DACs
10
______________________________________________________________________________________
Pin Description
PIN
NAME
FUNCTION
1
OUTA
DAC A Output
2
3
4
5
6
7
REFA
GND
LDAC
CS
SCLK
DIN
Reference for DAC A
Ground
Load DACs A and B
Chip Select Input
Shift Register Serial Clock Input
Serial Data Input
8
V
DD
REFB
Positive Supply
9
Reference for DAC B
10
OUTB
DAC B Output
2
μ
s/div
MAX5235
MAJOR-CARRY GLITCH
CS
2V/div
MAX5234 toc28
OUT_
50mV/div
AC-COUPLED
0
0.50
0.25
1.25
1.00
0.75
2.00
1.75
1.50
2.25
0
0.50
0.25
0.75
1.00
1.25
MAX5234
FULL-SCALE OUTPUT VOLTAGE
vs. REFERENCE VOLTAGE
M
V
REF
(V)
V
O
0
1.0
0.5
2.5
2.0
1.5
4.0
3.5
3.0
4.5
0
1.0
0.5
1.5
2.0
2.5
MAX5235
FULL-SCALE OUTPUT VOLTAGE
vs. REFERENCE VOLTAGE
M
V
REF
(V)
V
O
Typical Operating Characteristics (continued)
(V
DD
= +5V (MAX5235) V
DD
= +3V (MAX5234), R
L
= 5k
, C
L
= 100pF, V
REF
= +1.25V (MAX5234), V
REF
= +2.5V (MAX5235), C
REF
= 0.1μF ceramic || 2.2μF electrolytic, both DACs on, V
OUT
= full scale, T
A
= +25
°
C, unless otherwise noted.)
相關PDF資料
PDF描述
MAX5235AEUB Single-Supply 3V/5V, Voltage-Output, Dual, Precision 12-Bit DACs
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相關代理商/技術參數(shù)
參數(shù)描述
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MAX5235AEUB+T 功能描述:數(shù)模轉換器- DAC 12-Bit 2Ch Precision DAC RoHS:否 制造商:Texas Instruments 轉換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
MAX5235AEUB-T 功能描述:數(shù)模轉換器- DAC RoHS:否 制造商:Texas Instruments 轉換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
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