AVDD = 2.7 V to 5.25 V, DV
參數(shù)資料
型號: AD7794BRU-REEL
廠商: Analog Devices Inc
文件頁數(shù): 32/37頁
文件大小: 0K
描述: IC ADC 24BIT 6CH LP 24-TSSOP
標(biāo)準(zhǔn)包裝: 2,500
位數(shù): 24
采樣率(每秒): 470
數(shù)據(jù)接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 2.5mW
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-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 24-TSSOP
包裝: 帶卷 (TR)
輸入數(shù)目和類型: 6 個(gè)差分,單極;6 個(gè)差分,雙極
配用: EVAL-AD7794EBZ-ND - BOARD EVALUATION FOR AD7794
AD7794/AD7795
Rev. D | Page 3 of 36
SPECIFICATIONS
AVDD = 2.7 V to 5.25 V, DVDD = 2.7 V to 5.25 V, GND = 0 V, all specifications TMIN to TMAX, unless otherwise noted.
Table 1.
Parameter1
AD7794/AD7795
Unit
Test Conditions/Comments
CHOP ENABLED
Output Update Rate
4.17 to 470
Hz nom
Settling time = 2/output update rate
No Missing Codes2
AD7794
24
Bits min
fADC ≤ 242 Hz
AD7795
16
Bits min
Resolution
RMS Noise and Update Rates
Integral Nonlinearity
±15
ppm of FSR
max
Offset Error3
±1
μV typ
Offset Error Drift vs. Temperature4
±10
nV/°C typ
Full-Scale Error3, 5
±10
μV typ
Gain Drift vs. Temperature4
±1
ppm/°C typ
Gain = 1 to 16, external reference
±3
ppm/°C typ
Gain = 32 to 128, external reference
Power Supply Rejection
100
dB min
AIN = 1 V/gain, gain ≥ 4, external reference
ANALOG INPUTS
Differential Input Voltage Ranges
±VREF/gain
V nom
VREF = REFIN(+) REFIN(), or internal reference,
gain = 1 to 128
Absolute AIN Voltage Limits2
Unbuffered Mode
GND 30 mV
V min
Gain = 1 or 2
AVDD + 30 mV
V max
Buffered Mode
GND + 100 mV
V min
Gain = 1 or 2
AVDD 100 mV
V max
In-Amp Active
GND + 300 mV
V min
Gain = 4 to 128
AVDD 1.1
V max
Common-Mode Voltage, VCM
0.5
V min
VCM = (AIN(+) + AIN())/2, gain = 4 to 128
Analog Input Current
Buffered Mode or In-Amp
Active
Average Input Current2
AD7794B/AD7795B
±1
nA max
Gain = 1 or 2, update rate < 100 Hz
±250
pA max
Gain = 4 to 128, update rate < 100 Hz
±1
nA max
AIN6(+)/AIN6()
AD7794C
±3
nA max
Gain = 1 or 2, update rate < 100 Hz
±2
nA max
Gain = 4 to 128, update rate < 100 Hz
±3
nA max
AIN6(+)/AIN6()
Average Input Current Drift
±2
pA/°C typ
Unbuffered Mode
Gain = 1 or 2
Average Input Current
±400
nA/V typ
Input current varies with input voltage
Average Input Current Drift
±50
pA/V/°C typ
Normal Mode Rejection2, 6
Internal Clock
@ 50 Hz, 60 Hz
65
dB min
80 dB typ, 50 ± 1 Hz, 60 ± 1 Hz, FS[3:0] = 1010
@ 50 Hz
80
dB min
90 dB typ, 50 ± 1 Hz, FS[3:0] = 1001
@ 60 Hz
90
dB min
100 dB typ, 60 ± 1 Hz, FS[3:0] = 1000
External Clock
@ 50 Hz, 60 Hz
80
dB min
90 dB typ, 50 ± 1 Hz, 60 ± 1 Hz, FS[3:0] = 1010
@ 50 Hz
94
dB min
100 dB typ, 50 ± 1 Hz, FS[3:0] = 1001
@ 60 Hz
90
dB min
100 dB typ, 60 ± 1 Hz, FS[3:0] = 1000
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