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參數(shù)資料
| 型號(hào)： | AD7665ASTZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 20/23頁 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT CMOS 5V 48-LQFP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | PulSAR® |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 570k |
| 數(shù)據(jù)接口： | 串行，并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 74mW |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-LQFP |
| 供應(yīng)商設(shè)備封裝： | 48-LQFP（7x7） |
| 包裝： | 托盤 |
| 輸入數(shù)目和類型： | 4 個(gè)單端，單極；4 個(gè)單端，雙極 |
| 配用： | EVAL-AD7665CBZ-ND - BOARD EVALUATION FOR AD7665 |
REV.
AD7665
–6–
PIN FUNCTION DESCRIPTION
Pin
No.
Mnemonic
Type
Description
1
AGND
P
Analog Power Ground Pin.
2
AVDD
P
Input Analog Power Pin. Nominally 5 V.
3, 44–48
NC
No Connect.
4
BYTESWAP
Parallel Mode Selection (8/16 Bit). When LOW, the LSB is output on D[7:0] and the MSB is
output on D[15:8]. When HIGH, the LSB is output on D[15:8] and the MSB is output on D[7:0].
5OB/
2C
DI
Straight Binary/Binary Twos Complement. When OB/
2C is HIGH, the digital output is straight
binary; when LOW, the MSB is inverted, resulting in a twos complement output from its internal
shift register.
6
WARP
DI
Mode Selection. When HIGH and IMPULSE LOW, this input selects the fastest mode, the
maximum throughput is achievable, and a minimum conversion rate must be applied in order
to guarantee full specified accuracy. When LOW, full accuracy is maintained independent of
the minimum conversion rate.
7
IMPULSE
DI
Mode Selection. When HIGH and WARP LOW, this input selects a reduced Power Mode.
In this mode, the power dissipation is approximately proportional to the sampling rate.
8
SER/
PAR
DI
Serial/Parallel Selection Input. When LOW, the Parallel Port is selected; when HIGH, the
Serial Interface Mode is selected and some bits of the data bus are used as a Serial Port.
9, 10
D[0:1]
DO
Bit 0 and Bit 1 of the Parallel Port Data Output Bus. When SER/
PAR is HIGH, these outputs
are in high impedance.
11, 12
D[2:3] or
DI/O
When SER/
PAR is LOW, these outputs are used as Bit 2 and Bit 3 of the Parallel Port Data
Output Bus.
DIVSCLK[0:1]
When SER/
PAR is HIGH, EXT/INT is LOW and RDC/SDIN is LOW, which is the Serial
Master Read after Convert Mode. These inputs, part of the Serial Port, are used to slow down,
if desired, the internal serial clock that clocks the data output. In the other serial modes, these
pins are high impedance outputs.
13
D[4]
DI/O
When SER/
PAR is LOW, this output is used as Bit 4 of the Parallel Port Data Output Bus.
or EXT/
INT
When SER/
PAR is HIGH, this input, part of the Serial Port, is used as a digital select input for
choosing the internal or an external data clock, called respectively, Master and Slave Modes.
With EXT/
INT tied LOW, the internal clock is selected on SCLK output. With EXT/INT set to a
logic HIGH, output data is synchronized to an external clock signal connected to the SCLK
input and the external clock is gated by
CS.
14
D[5]
DI/O
When SER/
PAR is LOW, this output is used as Bit 5 of the Parallel Port Data Output Bus.
or INVSYNC
When SER/
PAR is HIGH, this input, part of the Serial Port, is used to select the active state
of the SYNC signal. When LOW, SYNC is active HIGH. When HIGH, SYNC is active LOW.
15
D[6]
DI/O
When SER/
PAR is LOW, this output is used as Bit 6 of the Parallel Port Data Output Bus.
or INVSCLK
When SER/
PAR is HIGH, this input, part of the Serial Port, is used to invert the SCLK signal.
It is active in both master and slave mode.
16
D[7]
DI/O
When SER/
PAR is LOW, this output is used as Bit 7 of the Parallel Port Data Output Bus.
or RDC/SDIN
When SER/
PAR is HIGH, this input, part of the Serial Port, is used as either an external data
input or a read mode selection input, depending on the state of EXT/
INT.
When EXT/
INT is HIGH, RDC/SDIN could be used as a data input to daisy-chain the conversion
results from two or more ADCs onto a single SDOUT line. The digital data level on SDIN is
output on DATA with a delay of 16 SCLK periods after the initiation of the read sequence.
When EXT/
INT is LOW, RDC/SDIN is used to select the Read Mode. When RDC/SDIN is
HIGH, the previous data is output on SDOUT during conversion. When RDC/SDIN is LOW,
the data can be output on SDOUT only when the conversion is complete.
17
OGND
P
Input/Output Interface Digital Power Ground.
18
OVDD
P
Input/Output Interface Digital Power. Nominally at the same supply as the supply of the host
interface (5 V or 3 V).
19
DVDD
P
Digital Power. Nominally at 5 V.
20
DGND
P
Digital Power Ground.
C
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