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AD5780ACPZ-REEL7 датащи(PDF) 9 Page - Analog Devices

номер детали AD5780ACPZ-REEL7
подробное описание детали  System Ready, 18-Bit 짹1 LSB INL
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

AD5780ACPZ-REEL7 датащи(HTML) 9 Page - Analog Devices

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Data Sheet
AD5780
Rev. C | Page 9 of 28
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
2
1
3
4
5
6
7
18
19
17
16
15
14
13
LDAC
CLR
VDD
RESET
VDD
VREFP
VOUT
SCLK
SYNC
DGND
VREFN
VSS
VSS
AGND
NOTES
1. DNC = DO NOT CONNECT. DO NOT CONNECT TO THIS PIN.
2. NEGATIVE ANALOG SUPPLY CONNECTION (VSS).
A VOLTAGE IN THE RANGE OF –16.5 V TO –2.5 V
CAN BE CONNECTED. VSS SHOULD BE DECOUPLED
TO AGND. THE PADDLE CAN BE LEFT ELECTRICALLY
UNCONNECTED PROVIDED THAT A SUPPLY
CONNECTION IS MADE AT THE VSS PINS. IT IS
RECOMMENDED THAT THE PADDLE BE THERMALLY
CONNECTED TO A COPPER PLANE FOR ENHANCED
THERMAL PERFORMANCE.
AD5780
TOP VIEW
(Not to Scale)
Figure 5. Pin Configuration
Table 5. Pin Function Descriptions
Pin No.
Mnemonic
Description
1
VOUT
Analog Output Voltage.
2
VREFP
Positive Reference Voltage Input. A voltage in the range of 5 V to VDD − 2.5 V can be connected to this pin.
3, 5
VDD
Positive Analog Supply Connection. A voltage in the range of 7.5 V to 16.5 V can be connected to this pin. VDD must be
decoupled to AGND.
4
RESET
Active Low Reset. Asserting this pin returns the AD5780 to its power-on status.
6
CLR
Active Low Input. Asserting this pin sets the DAC register to a user defined value (see
Table 12) and updates the DAC
output. The output value depends on the DAC register coding that is being used, either binary or twos complement.
7
LDAC
Active Low Load DAC Logic Input. This pin is used to update the DAC register and, consequently, the analog output.
When tied permanently low, the output is updated on the rising edge of SYNC. If LDAC is held high during the write cycle,
the input register is updated, but the output update is held off until the falling edge of LDAC. Do not leave the LDAC pin
unconnected.
8
VCC
Digital Supply. Voltage range is from 2.7 V to 5.5 V. VCC should be decoupled to DGND.
9
IOVCC
Digital Interface Supply. Digital threshold levels are referenced to the voltage applied to this pin. Voltage range is from
1.71 V to 5.5 V.
10, 21,
22, 23
DNC
Do Not Connect. Do not connect to these pins.
11
SDO
Serial Data Output.
12
SDIN
Serial Data Input. This device has a 24-bit input shift register. Data is clocked into the register on the falling edge of the
serial clock input.
13
SCLK
Serial Clock Input. Data is clocked into the input shift register on the falling edge of the serial clock input. Data can be
transferred at rates of up to 35 MHz.
14
SYNC
Level Triggered Control Input (Active Low). This is the frame synchronization signal for the input data. When SYNC goes
low, it enables the input shift register, and data is then transferred in on the falling edges of the following clocks. The DAC
is updated on the rising edge of SYNC.
15
DGND
Ground Reference Pin for Digital Circuitry.
16
VREFN
Negative Reference Voltage Input.
17, 18
VSS
Negative Analog Supply Connection. A voltage in the range of −16.5 V to −2.5 V can be connected to this pin.
VSS must be decoupled to AGND.
19
AGND
Ground Reference Pin for Analog Circuitry.
20
RFB
Feedback Connection for External Amplifier. See the
AD5780 Features section for further details.
24
INV
Inverting Input Connection for External Amplifier. See the
AD5780 Features section for further details.
EPAD
VSS
Negative Analog Supply Connection (VSS). A voltage in the range of −16.5 V to −2.5 V can be connected to this pin. VSS
must be decoupled to AGND. The paddle can be left electrically unconnected provided that a supply connection is made
at the VSS pins. It is recommended that the paddle be thermally connected to a copper plane for enhanced thermal
performance.


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