參數(shù)資料
型號： EVAL-AD5757SDZ
廠商： Analog Devices Inc
文件頁數(shù)： 29/44頁
文件大?。?/td> 0K
描述： BOARD EVAL FOR AD5757
標(biāo)準(zhǔn)包裝： 1
DAC 的數(shù)量： 4
位數(shù)： 16
數(shù)據(jù)接口： 串行
設(shè)置時(shí)間： 15µs
DAC 型： 電流
工作溫度： -40°C ~ 105°C
已供物品： 板
已用 IC / 零件： AD5757
Data Sheet
AD5757
Rev. D | Page 35 of 44
If the error check fails, the FAULT pin goes low and the PEC
error bit in the status register is set. After reading the status
register, FAULT returns high (assuming there are no other
faults), and the PEC error bit is cleared automatically. It is not
recommended to tie both AD1 and AD0 low as a short low on
SDIN could possibly lead to a zero-scale update for DAC A.
SDIN
SYNC
SCLK
UPDATE ON SYNC HIGH
MSB
D23
LSB
D0
24-BIT DATA
24-BIT DATA TRANSFER—NO ERROR CHECKING
SDIN
FAULT
SYNC
SCLK
UPDATE ON SYNC HIGH
ONLY IF ERROR CHECK PASSED
FAULT PIN GOES LOW
IF ERROR CHECK FAILS
MSB
D31
LSB
D8
D7
D0
24-BIT DATA
8-BIT CRC
32-BIT DATA TRANSFER WITH ERROR CHECKING
09225-
008
Figure 54. PEC Timing
The PEC can be used for both transmit and receive of data
packets. If status readback during a write is enabled, the PEC
values returned during the status readback during a write
operation should be ignored. If status readback during a write is
disabled, the user can still use the normal readback operation to
monitor status register activity with PEC.
WATCHDOG TIMER
When enabled, an on-chip watchdog timer generates an alert
signal if 0x195 has not been written to the software register
within the programmed timeout period. This feature is useful
to ensure that communication has not been lost between the
MCU and the AD5757 and that these datapath lines are working
properly (that is, SDIN, SCLK, and SYNC). If 0x195 is not
received by the software register within the timeout period,
the ALERT pin signals a fault condition. The ALERT signal is
active high and can be connected directly to the CLEAR pin to
enable a CLEAR in the event that communication from the
MCU is lost.
The watchdog timer is enabled, and the timeout period (5 ms,
10 ms, 100 ms, or 200 ms) is set in the main control register (see
OUTPUT ALERT
The AD5757 is equipped with an ALERT pin. This is an active
high CMOS output. The AD5757 also has an internal watchdog
timer. When enabled, it monitors SPI communications. If 0x195
is not received by the software register within the timeout period,
the ALERT pin goes active.
INTERNAL REFERENCE
The AD5757 contains an integrated 5 V voltage reference with
initial accuracy of ±5 mV maximum and a temperature drift
coefficient of ±10 ppm maximum. The reference voltage
is buffered and externally available for use elsewhere within
the system. REFOUT must be connected to REFIN to use the
internal reference.
EXTERNAL CURRENT SETTING RESISTOR
Referring to Figure 49, RSET is an internal sense resistor as part
of the voltage to current conversion circuitry. The stability of
the output current value over temperature is dependent on the
stability of the value of RSET. As a method of improving the
stability of the output current over temperature, an external
15 k low drift resistor can be connected to the RSET_x pin of
the AD5757 to be used instead of the internal resistor, R1.
The external resistor is selected via the DAC control register
(see Table 19).
Table 1 outlines the performance specifications of the AD5757
with both the internal RSET resistor and an external, 15 k RSET
resistor. Using an external RSET resistor allows for improved
performance over the internal RSET resistor option. The external
RSET resistor specification assumes an ideal resistor; the actual
performance depends on the absolute value and temperature
coefficient of the resistor used. This directly affects the gain error
of the output, and thus the total unadjusted error. To arrive at
the gain/TUE error of the output with a particular external RSET
resistor, add the percentage absolute error of the RSET resistor
directly to the gain/TUE error of the AD5757 with the external
RSET resistor, shown in Table 1 (expressed in % FSR).
HART
The AD5757 has four CHART pins, one corresponding to each
output channels. A HART signal can be coupled into these pins.
The HART signal appears on the corresponding current output,
if the output is enabled. Table 30 shows the recommended input
voltages for the HART signal at the CHART pin. If these
voltages are used, the current output should meet the HART
amplitude specifications. Figure 55 shows the recommended
circuit for attenuating and coupling in the HART signal.
Table 30. CHART Input Voltage to HART Output Current
R
SET
CHART Input
Voltage
Current Output
(HART)
Internal R
SET
150 mV p-p
1 mA p-p
External R
SET
170 mV p-p
1 mA p-p
HART MODEM
OUTPUT
C1
C2
CHARTx
09225-
076
Figure 55. Coupling HART Signal
A minimum capacitance of C1 + C2 is required to ensure that
the 1.2 kHz and 2.2 kHz HART frequencies are not significantly
相關(guān)PDF資料
PDF描述
EVAL-AD5760SDZ BOARD EVAL FOR AD5760SDZ
HKQ0603S4N7C-T INDUCTOR HI FREQ 4.7NH 0201
LGU2D471MELZ CAP ALUM 470UF 200V 20% SNAP
SEK331M100ST CAP ALUM 330UF 100V 20% RADIAL
MC56F8006DEMO DEMO BOARD FOR MC56F8006
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
EVAL-AD5760SDZ 功能描述:BOARD EVAL FOR AD5760SDZ RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 數(shù)模轉(zhuǎn)換器 (DAC) 系列:* 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- DAC 的數(shù)量:4 位數(shù):12 采樣率（每秒）:- 數(shù)據(jù)接口:串行，SPI? 設(shè)置時(shí)間:3µs DAC 型:電流/電壓 工作溫度:-40°C ~ 85°C 已供物品:板 已用 IC / 零件:MAX5581
EVAL-AD5764EB 制造商:Analog Devices 功能描述:EVALUATION BOARD FOR QUAD, 16-BIT, HIGH ACCURACY, SERIAL INPUT, BIPOLAR VOLTAGE OUTPUT DAC 制造商:Analog Devices 功能描述:EVALUATION CONTROL BOARD I.C. - Bulk
EVAL-AD5764EBZ 功能描述:BOARD EVAL FOR AD5764 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 數(shù)模轉(zhuǎn)換器 (DAC) 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- DAC 的數(shù)量:4 位數(shù):12 采樣率（每秒）:- 數(shù)據(jù)接口:串行，SPI? 設(shè)置時(shí)間:3µs DAC 型:電流/電壓 工作溫度:-40°C ~ 85°C 已供物品:板 已用 IC / 零件:MAX5581
EVAL-AD5764REBZ 功能描述:EVAL BOARD FOR AD5764 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 數(shù)模轉(zhuǎn)換器 (DAC) 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- DAC 的數(shù)量:4 位數(shù):12 采樣率（每秒）:- 數(shù)據(jù)接口:串行，SPI? 設(shè)置時(shí)間:3µs DAC 型:電流/電壓 工作溫度:-40°C ~ 85°C 已供物品:板 已用 IC / 零件:MAX5581
EVAL-AD5765EBZ 功能描述:BOARD EVAL FOR AD5765 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 數(shù)模轉(zhuǎn)換器 (DAC) 系列:* 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- DAC 的數(shù)量:4 位數(shù):12 采樣率（每秒）:- 數(shù)據(jù)接口:串行，SPI? 設(shè)置時(shí)間:3µs DAC 型:電流/電壓 工作溫度:-40°C ~ 85°C 已供物品:板 已用 IC / 零件:MAX5581
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*