參數(shù)資料
型號(hào)： MAX5237EUB+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 2/19頁(yè)
文件大?。?/td> 0K
描述： IC DAC 10BIT DUAL 5V 10-UMAX
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,500
設(shè)置時(shí)間： 10µs
位數(shù)： 10
數(shù)據(jù)接口： 串行
轉(zhuǎn)換器數(shù)目： 2
電壓電源： 單電源
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 10-TFSOP，10-MSOP（0.118"，3.00mm 寬）
供應(yīng)商設(shè)備封裝： 10-µMAX
包裝： 帶卷 (TR)
輸出數(shù)目和類型： 2 電壓，單極；2 電壓，雙極
采樣率（每秒）： *
MAX5236/MAX5237
Detailed Description
The MAX5236/MAX5237 10-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
consisting 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, maximiz-
ing the output voltage swing, and a programmable
shutdown output impedance of 1k
or 200k. The full-
scale output voltage is 4.092V for the MAX5237 and
2.046V for the MAX5236. 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 MAX5237 and 0.25V to 1.5V for the MAX5236. For
proper operation do not exceed the input voltage
range limits. Determine the output voltage using the fol-
lowing equation:
VOUT_ = (VREF_ x NB / 1024) x 1.6384V/V
where NB is the numeric value of the DACs binary input
code (0 to 1023), VREF_ 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 typical
slew rate of 0.6V/s and settle to 1/2LSB within 10s
(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 10-Bit DACs
10
______________________________________________________________________________________
Pin Description
PIN
NAME
FUNCTION
1
OUTA
DAC A Output
2
REFA
Reference for DAC A
3
GND
Ground
4
LDAC
Load DACs A and B
5
CS
Chip Select Input
6
SCLK
Shift Register Serial Clock Input
7
DIN
Serial Data Input
8VDD
Positive Supply
9
REFB
Reference for DAC B
10
OUTB
DAC B Output
2
s/div
MAX5237
MAJOR CARRY GLITCH
CS
2V/div
MAX5236/7 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
MAX5236
FULL-SCALE OUTPUT VOLTAGE
vs. REFERENCE VOLTAGE
MAX5236/7
toc29
VREF (V)
V
OUT
(V)
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
MAX5237
FULL-SCALE OUTPUT VOLTAGE
vs. REFERENCE VOLTAGE
MAX5236/7
toc30
VREF (V)
V
OUT
(V)
Typical Operating Characteristics (continued)
(VDD = +5V (MAX5237) VDD = +3V (MAX5236), RL = 5k
, CL = 100pF, VREF = +1.25V (MAX5236), VREF = +2.5V (MAX5237), CREF
= 0.1F ceramic || 2.2F electrolytic, both DACs on, VOUT = full scale, TA = +25°C, unless otherwise noted.)
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