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| 型号： | AD5390BCP-3-REEL |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | DAC |
| 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： | SERIAL INPUT LOADING, 8 us SETTLING TIME, 14-BIT DAC, QCC64 |
| 封装： | 9 X 9 MM, MO-220VMMD-4, LFCSP-64 |
| 文件页数： | 16/44页 |
| 文件大小： | 1319K |
| 代理商： | AD5390BCP-3-REEL |
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AD5390/AD5391/AD5392
Table 9. Pin Function Descriptions
Mnemonic
VOUTX
Rev. A | Page 16 of 44
Function
Buffered Analog Outputs for Channel X. Each analog output is driven by a rail-to-rail output amplifier operating at a gain
of 2. Each output is capable of driving an output load of 5 k to ground. Typical output impedance is 0.5 .
Analog Ground Reference Points for each group of eight output channels. All SIGNAL_GND pins are tied together
internally and should be connected to the AGND plane as close as possible to the AD539x.
Each group of eight channels contains a DAC_GND pin. This is the ground reference point for the internal 14-bit DACs.
These pins should be connected to the AGND plane.
Analog Ground Reference Point. Each group of eight channels contains an AGND pin. All AGND pins should be
connected externally to the AGND plane.
Analog Supply Pins. Each group of eight channels has a separate AV
DD
pin. These pins should be decoupled with 0.1 uF
ceramic capacitors and 10 μF tantalum capacitors. Operating range is 5 V ± 10%.
Ground for All Digital Circuitry.
Logic Power Supply. Guaranteed operating range is 2.7 V to 5.5 V. Recommended that these pins be decoupled with
0.1 μF ceramic capacitors and 10 μF tantalum capacitors to DGND.
Ground Reference Point for the Internal Reference. Connect to AGND.
The AD539x contains a common REFOUT/REFIN pin. When the internal reference is selected, this pin is the reference
output. If the application necessitates the use of an external reference, it can be applied to this pin and the internal
reference disabled via the control register. The default for this pin is a reference input.
Analog Output Pin. When the monitor function is enabled on the AD5390/AD5391, the MON_OUT acts as the output of
a 16-to-1 channel multiplexer, which can be programmed to multiplex any channel output to the MON_OUT pin. When
the monitor function is enabled on the AD5392, the MON_OUT acts as the output of an 8-to-1 channel multiplexer that
can be programmed to multiplex any channel output to the MON_OUT pin. The MON_OUT pin output impedance is
typically 500 and is intended to drive a high input impedance such as that exhibited by SAR ADC inputs.
Monitor Input Pins. The AD539x contains two monitor input pins to which the user can connect input signals (within the
maximum ratings of the device) for monitoring purposes. Any of the signals applied to the MON_IN pins along with the
output channels can be switched to the MON_OUT pin via software. An external ADC, for example, can be used to
monitor these signals.
Serial Interface Pin.This is the frame synchronization input signal for the serial interface. When taken low, the internal
counter is enabled to count the required number of clocks before the addressed register is updated.
In I
2
C mode, AD0 acts as a hardware address pin.
Interface Control Pin. Operation is determined by the interface select bit SPI/I
2
C.
Serial Interface Mode: Daisy-Chain Select Input (level-sensitive, active high). When high, this pin enables daisy-chain
operation to allow a number of devices to be cascaded together.
I
2
C Mode: This pin acts as a hardware address pin used in conjunction with AD0 to determine the software address for
this device on the I
2
C bus.
Serial Data Output. Three-statable CMOS output. SDO can be used for daisy-chaining a number of devices together. Data
is clocked out on SDO on the rising edge of SCLK and is valid on the falling edge of SCLK.
Digital CMOS Output. BUSY goes low during internal calculations of the data (x2) loaded to the DAC data register. During
this time, the user can continue writing new data to further the x1, c, and m registers (these are stored in a FIFO), but no
further updates to the DAC registers and DAC outputs can take place. If LDAC is taken low while BUSY is low this event is
stored. BUSY also goes low during power-on reset and when the RESET pin is low. During this time the interface is
disabled and any events on LDAC are ignored. A CLR operation also brings BUSY low.
Load DAC Logic Input (active low). If LDAC is taken low while BUSY is inactive (high), the contents of the input registers
are transferred to the DAC registers and the DAC outputs are updated. If LDAC is taken low while BUSY is active and
internal calculations are taking place, the LDAC event is stored and the DAC registers are updated when BUSY goes
inactive. However, any events on LDAC during power-on reset or RESET are ignored.
Asynchronous Clear Input. The CLR input is falling edge sensitive. While CLR is low, all LDAC pulses are ignored. When
CLR is activated, all channels are updated with the data contained in the CLR code register. BUSY is low for a duration of
20 μs (AD5390/91) and 15 μs (AD5392) while all channels are being updated with the CLR code.
Asynchronous Digital Reset Input (falling edge sensitive). The function of this pin is equivalent to that of the power-on
reset generator. When this pin is taken low, the state machine initiates a reset sequence to digitally reset the x1, m, c, and
x2 registers to their default power-on values. This sequence takes 270 μs max. This falling edge of RESET initiates the
RESET process and BUSY goes low for the duration, returning high when RESET
is
complete
. While BUSY is low, all
interfaces are disabled and all LDAC pulses are ignored. When BUSY returns high, the part resumes normal operation
and the status of the RESET pin is ignored until the next falling edge is detected.
SIGNAL_GND (1,
2)
DAC_GND (1, 2)
AGND (1, 2)
AV
DD
(1, 2)
DGND
DV
DD
REF_GND
REFOUT/REFIN
MON_OUT
MON_IN (1, 2)
SYNC/AD0
DCEN/AD1
SDO
BUSY
LDAC
CLR
RESET
相关PDF资料 |
PDF描述 |
|---|---|
| AD5391BCP-3-REEL | 8-/16-Channel, 3 V/5 V, Serial Input, Single- Supply, 12-/14-Bit Voltage Output DACs |
| AD5391BST-3 | 8-/16-Channel, 3 V/5 V, Serial Input, Single- Supply, 12-/14-Bit Voltage Output DACs |
| AD5391BST-5 | 8-/16-Channel, 3 V/5 V, Serial Input, Single- Supply, 12-/14-Bit Voltage Output DACs |
| AD5391BST-5-REEL | 8-/16-Channel, 3 V/5 V, Serial Input, Single- Supply, 12-/14-Bit Voltage Output DACs |
| AD5392 | 8-/16-Channel, 3 V/5 V, Serial Input, Single- Supply, 12-/14-Bit Voltage Output DACs |
相关代理商/技术参数 |
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| AD5390BCP-3-REEL7 | 制造商:Analog Devices 功能描述:DAC 16-CH Resistor-String 14-bit 64-Pin LFCSP EP T/R |
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