參數(shù)資料
型號(hào)： EVAL-AD5621EBZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 10/24頁(yè)
文件大小： 0K
描述： BOARD EVALUATION FOR AD5621
產(chǎn)品培訓(xùn)模塊： DAC Architectures
標(biāo)準(zhǔn)包裝： 1
系列： nanoDAC™
DAC 的數(shù)量： 1
位數(shù)： 12
采樣率（每秒）： 1.7M
數(shù)據(jù)接口： 串行
設(shè)置時(shí)間： 6µs
DAC 型： 電壓
工作溫度： -40°C ~ 125°C
已供物品： 板
已用 IC / 零件： AD5621
AD5601/AD5611/AD5621
Data Sheet
Rev. G | Page 18 of 24
APPLICATIONS
CHOOSING A REFERENCE AS POWER SUPPLY FOR
THE AD5601/AD5611/AD5621
The AD5601/AD5611/AD5621 come in tiny LFCSP and SC70
packages with less than a 100 A supply current. Because of
this, the choice of reference depends on the application
requirements. For applications with space-saving requirements,
the ADR02 is recommended. It is available in an SC70 package
and has excellent drift at 9 ppm/°C (3 ppm/°C in the R-8 package)
and provides very good noise performance at 3.4 V p-p in the 0.1
Hz to 10 Hz range.
Because the supply current required by the AD5601/AD5611/
AD5621 is extremely low, the parts are ideal for low supply
applications. The ADR395 voltage reference is recommended in
this case. It requires less than 100 A of quiescent current and
can, therefore, drive multiple DACs in one system, if required. It
also provides very good noise performance at 8 V p-p in the
0.1 Hz to 10 Hz range.
Figure 51. ADR395 as Power Supply to the AD5601/AD5611/AD5621
Some recommended precision references for use as supplies to
the AD5601/AD5611/AD5621 are listed in Table 7.
Table 7. Precision References for the AD5601/AD5611/AD5621
Part No.
Initial
Accuracy
(mV max)
Temp Drift
(ppm/°C max)
0.1 Hz to 10 Hz
Noise (V p-p typ)
±2
3 (R-8)
8
±2
3 (R-8)
3.4
±3
3 (R-8)
10
±3
3 (SC70)
10
±5
9 (TSOT-23)
8
BIPOLAR OPERATION USING THE
AD5601/AD5611/AD5621
The AD5601/AD5611/AD5621 have been designed for single-
supply operation, but a bipolar output range is also possible
using the circuit shown in Figure 52. The circuit in Figure 52
gives an output voltage range of ±5 V. Rail-to-rail operation at
the amplifier output is achievable using an AD820 or OP295 as
the output amplifier.
Figure 52. Bipolar Operation with the AD5601/AD5611/AD5621
The output voltage for any input code can be calculated as
×
+
×
×
=
R1
R2
V
R1
R2
R1
D
V
DD
N
DD
OUT
2
where D represents the input code in decimal (0 – 2N).
With VDD = 5 V, R1 = R2 = 10 k
V
5
2
10
×
=
N
OUT
D
V
This is an output voltage range of ±5 V, with 0x0000 corre-
sponding to a 5 V output and 0x3FFF corresponding to a
+5 V output.
3-WIRE
SERIAL
INTERFACE
SYNC
SCLK
SDIN
7V
5V
VOUT = 0V TO 5V
ADR395
06853-
050
AD5601/AD5611/
AD5621
R2 = 10kΩ
06853-
051
+5V
–5V
AD820/
OP295
3-WIRE
SERIAL
INTERFACE
+5V
AD5601/AD5611/
AD5621
10F
0.1F
V
DD
V
OUT
R1 = 10kΩ
+5V
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