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参数资料
| 型号： | MAX5322EAI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/18页 |
| 文件大小： | 0K |
| 描述： | IC DAC 12BIT DUAL 10V SER 28SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,000 |
| 设置时间： | 10µs |
| 位数： | 12 |
| 数据接口： | 串行 |
| 转换器数目： | 2 |
| 电压电源： | 模拟和数字，双 ± |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 28-SSOP |
| 包装： | 带卷 (TR) |
| 输出数目和类型： | 2 电压，单极；2 电压，双极 |
| 采样率（每秒）： | * |
MAX5322
±10V, Dual, 12-Bit, Serial, Voltage-Output DAC
16
______________________________________________________________________________________
(max), DOUT is high impedance, and OUTA and OUTB
are pulled to SGNDA and SGNDB, respectively, through
the internal feedback resistors of the output amplifier
(Figure 1). When coming out of shutdown, or during
device power-up, allow 350s for the output to stabilize.
Applications Information
Power Supplies
A single supply of +12V to +15V is required to realize an
output swing of 0 to 10V. A dual supply of ±12V to ±15V
is required to realize an output swing of ±10V, and allows
unipolar, 0 to +10V output if UNI/BIP_ is forced high. A
+3V to +5V digital power supply and two +2.000V to
+5.250V external reference voltages are also required.
Always bring up the reference voltages last; the other
power supplies do not require sequencing.
Power-Supply Bypassing and
Ground Management
Bypass VDD and VSS with 1.0F and 0.1F capacitors to
AGND, and bypass VCC with a 1.0F and 0.1F capaci-
tors to DGND. Minimize trace lengths to reduce induc-
tance. Digital and AC transient signals on AGND or
DGND can create noise at the output. Connect AGND
and DGND to the highest quality ground available. Use
proper grounding techniques, such as a multilayer board
with a low-inductance ground plane or star connect all
ground return paths back to AGND. Carefully lay out the
traces between channels to reduce AC cross coupling
and crosstalk. Wire-wrapped boards, sockets, and
breadboards are not recommended.
BINARY DAC CODE
ANALOG OUTPUT
MSB
LSB
UNIPOLAR (UNI/
BIP_ = HIGH)
BIPOLAR (UNI/
BIP_ = LOW)
1111 1111 1111
+2 x VREF (4095 / 4096)
+2 x VREF (2047 / 2048)
1000 0000 0001
+2 x VREF (2049 / 4096)
+2 x VREF (1 / 2048)
1000 0000 0000
+2 x VREF (2048 / 4096) = VREF
0
0111 1111 1111
+2 x VREF (2047 / 4096)
-2 x VREF (1 / 2048)
0000 0000 0001
+2 x VREF (1 / 4096)
-2 x VREF (2047 / 2048)
0000 0000 0000
0
-2 x VREF (2048 / 2048) = -2 x VREF
Table 3. Output Voltage as Input Code Examples
hex DIGITAL INPUT CODE (LSB)
-2048
-2047
-2046
-2045
+2047
+2046
+2045
+2044
+1
0
-1
ANALOG
OUTPUT
VOL
TAGE
(LSB)
001
000
002
003
7FF
800
801
FFC
FFD
FFF
FFE
4x
V
REF
1 LSB =
4 x VREF
4096
Figure 6. Bipolar Transfer Function
hex DIGITAL INPUT CODE (LSB)
0
1
2
3
4095
4094
4093
4092
2049
2048
2047
ANALOG
OUTPUT
VOL
TAGE
(LSB)
001
000
002
003
7FF
800
801
FFC
FFD
FFF
FFE
2x
V
REF
1 LSB =
2 x VREF
4096
Figure 5. Unipolar Transfer Function
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