參數(shù)資料
型號(hào)： EVAL-AD7799EBZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 24/28頁(yè)
文件大?。?/td> 0K
描述： BOARD EVALUATION FOR AD7799
標(biāo)準(zhǔn)包裝： 1
ADC 的數(shù)量： 1
位數(shù)： 24
采樣率（每秒）： 470
數(shù)據(jù)接口： 串行
輸入范圍： ±VREF/增益
在以下條件下的電源（標(biāo)準(zhǔn)）： 2.5mW @ 470SPS
工作溫度： -40°C ~ 105°C
已用 IC / 零件： AD7799
已供物品： 板，纜線，CD
相關(guān)產(chǎn)品： AD7799BRU-REEL-ND - IC ADC 24BIT 3CH LP 16-TSSOP
AD7799BRUZ-REEL-ND - IC ADC 24BIT 3CH LP 16-TSSOP
AD7799BRUZ-ND - IC ADC 24BIT SIG-DEL 3CH 16TSSOP
AD7799BRU-ND - IC ADC 24BIT 3CH LP 16-TSSOP
Data Sheet
AD7798/AD7799
Rev. B | Page 5 of 28
Parameter
AD7798B/AD7799B1
Unit
Test Conditions/Comments
SYSTEM CALIBRATION2
Full-Scale Calibration Limit
1.05 × FS
V max
FS = Full-scale analog input. When VREF = AVDD, the
differential input must be limited to (0.9 × VREF/gain)
if the in-amp is active.
Zero-Scale Calibration Limit
1.05 × FS
V min
Input Span
0.8 × FS
V min
2.1 × FS
V max
POWER REQUIREMENTS7
Power Supply Voltage
AVDD – GND
2.7/5.25
V min/max
DVDD – GND
2.7/5.25
V min/max
Power Supply Currents
IDD Current
140
A max
Unbuffered mode, 110 A typ @ AVDD = 3 V,
125 A typ @ AVDD = 5 V
180
A max
Buffered mode, gain = 1 or 2, 130 A typ @ AVDD = 3 V,
165 A typ @ AVDD = 5 V
400
A max
AD7798: gain = 4 to 128, 300 A typ @ AVDD = 3 V,
350 A typ @ AVDD = 5 V
500
A max
AD7799: gain = 4 to 128, 380 A typ @ AVDD = 3 V,
440 A typ @ AVDD = 5 V
IDD (Power-Down Mode)
1
A max
1
Temperature range is –40°C to +105°C. At the 19.6 Hz and 39.2 Hz update rates, the INL, power supply rejection (PSR), common-mode rejection (CMR), and normal
mode rejection (NMR) do not meet the data sheet specification if the voltage on the AIN(+) or AIN() pins exceeds AVDD 1.6 V typically. When this voltage is
exceeded, the INL, for example, is reduced to 18 ppm of FS typically and the PSR is reduced to 69 dB typically. Therefore, for guaranteed performance at these update
rates, the absolute voltage on the analog input pins needs to be below AVDD 1.6 V.
2
Specification is not production tested, but is supported by characterization data at initial product release.
3
Following a calibration, this error is in the order of the noise for the programmed gain and update rate selected.
4
Recalibration at any temperature removes these errors.
5
Full-scale error applies to both positive and negative full-scale and applies at the factory calibration conditions (AVDD = 4 V, gain = 1, TA = 25°C).
6
FS[3:0] are the four bits used in the mode register to select the output word rate.
7
Digital inputs equal to DVDD or GND.
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