參數(shù)資料
型號(hào)： AD7856ARZ-REEL7
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 2/32頁(yè)
文件大小： 0K
描述： IC ADC 14BIT 8CHAN 5V 24SOIC
產(chǎn)品變化通告： Product Discontinuance 27/Oct/2011
標(biāo)準(zhǔn)包裝： 400
位數(shù)： 14
采樣率（每秒）： 285k
數(shù)據(jù)接口： 8051，QSPI?，串行，SPI? µP
轉(zhuǎn)換器數(shù)目： 2
功率耗散（最大）： 89.25mW
電壓電源： 模擬和數(shù)字
工作溫度： -40°C ~ 105°C
安裝類型： 表面貼裝
封裝/外殼： 24-SOIC（0.295"，7.50mm 寬）
供應(yīng)商設(shè)備封裝： 24-SOIC W
包裝： 帶卷 (TR)
輸入數(shù)目和類型： 8 個(gè)單端，單極；4 個(gè)偽差分，單極
AD7856
–10–
REV. A
CONTROL REGISTER
The arrangement of the Control Register is shown below. The control register is a write only register and contains 14 bits of data.
The control register is selected by putting two 1s in ADDR1 and ADDR0. The function of the bits in the control register are de-
scribed below. The power-up status of all bits is 0.
MSB
SGL/ DIFF
CH2
CH1
CH0
PMGT1
PMGT0
RDSLT1
RDSLT0
2/3 MODE
CONVST
CALMD
CALSLT1
CALSLT0
STCAL
LSB
CONTROL REGISTER BIT FUNCTION DESCRIPTION
Bit
Mnemonic
Comment
13
SGL/
DIFF
A 0 in this bit position configures the input channels in pseudo-differential mode. A 1 in this bit position
configures the input channels in single-ended mode (see Table III).
12
CH2
These three bits are used to select the channel on which the conversion is performed. The channels can
11
CH1
be configured as eight single-ended channels or four pseudo-differential channels. The default selection
10
CH0
is AIN1 for the positive input and AIN2 for the negative input (see Table III for channel selection).
9
PMGT1
Power Management Bits. These two bits are used with the
SLEEP pin for putting the part into various
8
PMGT0
power-down modes (see Power-Down section for more details).
7
RDSLT1
These two bits determine which register is addressed for the read operations (see Table II).
6
RDSLT0
52/
3 MODE
Interface Mode Select Bit. With this bit set to 0, Interface Mode 2 is enabled. With this bit set to 1,
Interface Mode 1 is enabled where DIN is used as an output as well as an input. This bit is set to 0 by
default after every read cycle; thus when using the Two-Wire Interface Mode, this bit needs to be set to
1 in every write cycle.
4
CONVST
Conversion Start Bit. A logic one in this bit position starts a single conversion, and this bit is automatically
reset to 0 at the end of conversion. This bit may also used in conjunction with system calibration (see
Calibration section.)
3
CALMD
Calibration Mode Bit. A 0 here selects self-calibration, and a 1 selects a system calibration (see Table IV).
2
CALSLT1
Calibration Selection Bits and Start Calibration Bit. These bits have two functions.
1
CALSLT0
With the STCAL bit set to 1 the CALSLT1 and CALSLT0 bits determine the type of calibration per-
0
STCAL
formed by the part (see Table IV). The STCAL bit is automatically reset to 0 at the end of calibration.
With the STCAL bit set to 0 the CALSLT1 and CALSLT0 bits are decoded to address the calibration
register for read/write of calibration coefficients (see section on the Calibration Registers for more details).
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AD7856KR-REEL 功能描述:IC ADC 14BIT 8CH 5V 24-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類型:1 個(gè)單端，單極；1 個(gè)單端，雙極
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