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參數(shù)資料
| 型號： | AD5392 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 8-/16-Channel, 3 V/5 V, Serial Input, Single- Supply, 12-/14-Bit Voltage Output DACs |
| 中文描述： | 8-/16-Channel，3伏/ 5伏，串行輸入，單電源，12-/14-Bit電壓輸出DAC |
| 文件頁數(shù)： | 23/44頁 |
| 文件大?。?/td> | 1319K |
| 代理商： | AD5392 |
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AD5390/AD5391/AD5392
FUNCTIONAL DESCRIPTION
DAC ARCHITECTURE—GENERAL
The AD5390/AD5391 are complete single-supply, 16-channel,
voltage output DACs offering a resolution of 14 bits and 12 bits,
respectively. The AD5392 is a complete single-supply, 8-channel,
voltage output DAC offering 14-bit resolution. All devices are
available in 64-lead LFCSP and 52-lead LQFP packages and
feature serial interfaces. This family includes an internal select-
able 1.25 V/2.5 V, 10 ppm/°C reference that can be used to drive
the buffered reference inputs (alternatively, an external refer-
ence can be used to drive these inputs). All channels have an on-
chip output amplifier with rail-to-rail output capable of driving
a 5 kΩ in parallel with a 200 pF load.
Rev. A | Page 23 of 44
The architecture of a single DAC channel consists of a 12-bit
and 14-bit resistor-string DAC followed by an output buffer
amplifier operating at a gain of 2. This resistor-string archi-
tecture guarantees DAC monotonicity. The 12-bit and 14-bit
binary digital code loaded to the DAC register deter-mines at
what node on the string the voltage is tapped off before being
fed to the output amplifier. Each channel on these devices con-
tains independent offset and gain control registers, allowing the
user to digitally trim offset and gain.
0
x1 INPUT
REG
m REG
c REG
x2
DAC
14-BIT
INPUT
DATA
R
R
AVDD
VOUT
VREF
Figure 31. AD5390/92 Single-Channel Architecture
These registers let the user calibrate out errors in the complete
signal chain including the DAC using the internal m and c
registers, which hold the correction factors. All channels are
double-buffered, allowing synchronous updating of all channels
using the LDAC pin. Figure 31 shows a block diagram of a
single channel on the AD5390/AD5391/AD5392.
The digital input transfer function for each DAC can be
represented as
(
)
(
)
1
2
1
2
/
(
2
+
×
+
=
n
n
c
x
m
x
where:
x
2 is the data-word loaded to the resistor-string DAC.
x
1 is the 12-bit and 14-bit data-word written to the DAC input
register.
m
is the 12-bit and 14-bit gain coefficient (default is all 0x3FFE
on the AD5390/AD5392 and 0xFFE on the AD5391). The LSB
of the gain coefficient is zero.
n
= DAC resolution (
n
= 14 for the AD5390/AD5392 and
n
= 12 for the AD5391).
c
is the 12-bit and 14-bit offset coefficient (default is 0x2000 on
the AD5390/AD5392 and 0x800 on the AD5391).
The complete transfer function for these devices can be
represented as
n
x
VREF
VOUT
2
/
2
×
×
=
where:
x
2 is the data-word loaded to the resistor-string DAC.
V
REF
is the reference voltage applied to the REFIN/REFOUT pin
on the DAC when an external reference is used, 2.5 V for
specified performance on the AD539x-5 products and 1.25 V
on the AD539x-3 products.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD5392BST-3 | 8-/16-Channel, 3 V/5 V, Serial Input, Single- Supply, 12-/14-Bit Voltage Output DACs |
| AD5392BST-5 | 8-/16-Channel, 3 V/5 V, Serial Input, Single- Supply, 12-/14-Bit Voltage Output DACs |
| AD5392BST-5-REEL | Quad 12-bit 125MSPS ADC with serialized LVDS output 64-VQFN -40 to 85 |
| AD5390BCP-3 | 8-/16-Channel, 3 V/5 V, Serial Input, Single- Supply, 12-/14-Bit Voltage Output DACs |
| AD5391BCP-3 | 8-/16-Channel, 3 V/5 V, Serial Input, Single- Supply, 12-/14-Bit Voltage Output DACs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD5392BCP | 制造商:Analog Devices 功能描述:DAC OCTAL RES-STRING 14BIT 64LFCSP - Bulk |
| AD5392BCP-3 | 制造商:Rochester Electronics LLC 功能描述:8/16-CHANNEL, 14/12-BIT, 3V/5V VOLTAGE OUT DAC - Bulk 制造商:Analog Devices 功能描述: |
| AD5392BCP-3-REEL7 | 制造商:Analog Devices 功能描述:DAC 8-CH Resistor-String 14-bit 64-Pin LFCSP EP T/R 制造商:Rochester Electronics LLC 功能描述:8-CHN 3V SINGLE SUPPLY 14-BIT VOUT I.C. - Tape and Reel |
| AD5392BCP-5 | 制造商:Analog Devices 功能描述:DAC 8-CH Resistor-String 14-bit 64-Pin LFCSP EP 制造商:Analog Devices 功能描述:14BIT DAC 8CH 5V 5392 LFCSP-64 |
| AD5392BCP-5-REEL | 制造商:Analog Devices 功能描述:DAC 8-CH Resistor-String 14-bit 64-Pin LFCSP EP T/R |
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