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參數(shù)資料
| 型號(hào)： | EVAL-AD7610CBZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 16/32頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVALUATION FOR AD7610 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | PulSAR® |
| ADC 的數(shù)量： | 1 |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 250k |
| 數(shù)據(jù)接口： | 串行，并聯(lián) |
| 在以下條件下的電源（標(biāo)準(zhǔn)）： | 90mW @ 250kSPS |
| 工作溫度： | -40°C ~ 85°C |
| 已用 IC / 零件： | AD7610 |
| 已供物品： | 板 |
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Data Sheet
AD7610
Rev. A | Page 23 of 32
INTERFACES
DIGITAL INTERFACE
The AD7610 has a versatile digital interface that can be set up
as either a serial or a parallel interface with the host system. The
serial interface is multiplexed on the parallel data bus. The AD7610
digital interface also accommodates 2.5 V, 3.3 V, or 5 V logic. In
most applications, the OVDD supply pin is connected to the host
system interface 2.5 V to 5.25 V digital supply. Finally, by using
the OB/2C input pin, both twos complement or straight binary
coding can be used.
Two signals, CS and RD, control the interface. When at least
one of these signals is high, the interface outputs are in high
impedance. Usually, CS allows the selection of each AD7610
in multicircuit applications and is held low in a single AD7610
design. RD is generally used to enable the conversion result on
the data bus.
RESET
The RESET input is used to reset the AD7610. A rising edge on
RESET aborts the current conversion (if any) and tristates the
data bus. The falling edge of RESET resets the AD7610 and clears
the data bus and configuration register. See Figure 34 for the
RESET timing details.
RESET
DATA
BUS
BUSY
CNVST
t8
t9
06395-
034
Figure 34. RESET Timing
PARALLEL INTERFACE
The AD7610 is configured to use the parallel interface when
SER/PAR is held low.
Master Parallel Interface
Data can be continuously read by tying CS and RD low, thus
requiring minimal microprocessor connections. However, in
this mode, the data bus is always driven and cannot be used in
shared bus applications (unless the device is held in RESET).
Figure 35 details the timing for this mode.
t1
BUSY
DATA
BUS
PREVIOUS CONVERSION DATA
NEW DATA
CNVST
CS = RD = 0
t10
t4
t11
t3
06395-
035
Figure 35. Master Parallel Data Timing for Reading (Continuous Read)
Slave Parallel Interface
In slave parallel reading mode, the data can be read either after
each conversion, which is during the next acquisition phase, or
during the following conversion, as shown in Figure 36 and
Figure 37, respectively. When the data is read during the conver-
sion, it is recommended that it is read only during the first half
of the conversion phase. This avoids any potential feedthrough
between voltage transients on the digital interface and the most
critical analog conversion circuitry.
CURRENT
CONVERSION
t13
t12
BUSY
DATA
BUS
RD
CS
06395-
036
Figure 36. Slave Parallel Data Timing for Reading (Read After Convert)
PREVIOUS
CONVERSION
t13
t12
t3
BUSY
DATA
BUS
CNVST,
RD
CS = 0
t4
t1
06395-
037
Figure 37. Slave Parallel Data Timing for Reading (Read During Convert)
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