參數(shù)資料
型號： EVAL-AD7607EDZ
廠商： Analog Devices Inc
文件頁數(shù)： 15/32頁
文件大?。?/td> 0K
描述： EVAL BOARD FOR AD7607
標準包裝： 1
ADC 的數(shù)量： 1
位數(shù)： 14
采樣率（每秒）： 200k
數(shù)據(jù)接口： DSP，MICROWIRE?，QSPI?，串行，SPI?
在以下條件下的電源（標準）： 80mW @ 200kSPS
工作溫度： -40°C ~ 85°C
已用 IC / 零件： AD7607
已供物品： 板
AD7607
Data Sheet
Rev. B | Page 22 of 32
TYPICAL CONNECTION DIAGRAM
Figure 39 shows the typical connection diagram for the AD7607.
There are four AVCC supply pins on the part, and each of the
four pins should be decoupled using a 100 nF capacitor at each
supply pin and a 10 F capacitor at the supply source. The AD7607
can operate with the internal reference or an externally applied
reference. In this configuration, the AD7607 is configured to
operate with the internal reference. When using a single AD7607
device on the board, the REFIN/REFOUT pin should be decoupled
with a 10 F capacitor. When using an application with multiple
AD7607 devices, refer to the Internal/External Reference section.
The REFCAPA and REFCAPB pins are shorted together and
decoupled with a 10 F ceramic capacitor.
The VDRIVE supply is connected to the same supply as the
processor. The VDRIVE voltage controls the voltage value of the
output logic signals. For layout, decoupling, and grounding
hints, see the Layout Guidelines section.
POWER-DOWN MODES
Two power-down modes are available on the AD7607: standby
mode and shutdown mode. The STBY pin controls whether
the AD7607 is in normal mode or in one of the two power-
down modes.
The power-down mode is selected through the state of the RANGE
pin when the STBY pin is low. Table 7 shows the configurations
required to choose the desired power-down mode. When the
AD7607 is placed in standby mode, current consumption is 8 mA
maximum and power-up time is approximately 100 s because
the capacitor on the REFCAPA and REFCAPB pins must charge
up. In standby mode, the on-chip reference and regulators
remain powered up, and the amplifiers and ADC core are
powered down.
When the AD7607 is placed in shutdown mode, current
consumption is 6 A maximum and power-up time is
approximately 13 ms (external reference mode). In shutdown
mode, all circuitry is powered down. When the AD7607 is
powered up from shutdown mode, a RESET signal must be
applied to the AD7607 after the required power-up time has
elapsed.
Table 7. Power-Down Mode Selection
Power-Down Mode
STBY
RANGE
Standby
0
1
Shutdown
0
AVCC
AGND
VDRIVE
+
REFIN/REFOUT
DB0 TO DB15
CONVST A, CONVST B
CS
RD
BUSY
RESET
AD7607
1F
10F
100nF
DIGITAL SUPPLY
VOLTAGE +2.3V TO +5V
ANALOG SUPPLY
VOLTAGE 5V1
EIGHT ANALOG
INPUTS V1 TO V8
PARALLEL
INTERFACE
1DECOUPLING SHOWN ON THE AVCC PIN APPLIES TO EACH AVCC PIN (PIN 1, PIN 37, PIN 38, PIN 48).
DECOUPLING CAPACITOR CAN BE SHARED BETWEEN AVCC PIN 37 AND PIN 38.
2DECOUPLING SHOWN ON THE REGCAP PIN APPLIES TO EACH REGCAP PIN (PIN 36, PIN 39).
REGCAP2
+
10F
REFCAPA
REFCAPB
OS 2
OS 1
OS 0
OVERSAMPLING
100nF
V1
PAR/SER SEL
STBY
REF SELECT
RANGE
V2
V3
V4
V5
V6
V7
V8
REFGND
V1GND
V2GND
V3GND
V4GND
V5GND
V6GND
V7GND
V8GND
VDRIVE
M
ICRO
P
RO
CE
S
O
R/
M
ICRO
CO
NV
E
RT
E
R/
DS
P
08096-
039
Figure 39. Typical Connection Diagram
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