參數(shù)資料
型號： ADS7891
英文描述： CMOS Hex Schmitt Triggers 14-SO -55 to 125
中文描述： 3 MSPS的14位低功耗的SAR模數(shù)轉(zhuǎn)換器
文件頁數(shù)： 3/26頁
文件大?。?/td> 329K
代理商： ADS7891
SLAS410 DECEMBER 2003
www.ti.com
3
SPECIFICATIONS
TA = 40
°
C to 85
°
C, +VA = 5 V, +VBD = 5 V or 3.3 V, Vref = 2.5 V, fsample = 3 MHz (unless otherwise noted)
PARAMETER
ANALOG INPUT
Full-scale input span(1)
+IN – (IN)
TEST CONDITIONS
MIN
TYP
MAX
UNIT
0
Vref
V
Absolute input range
+IN
0.2
Vref + 0.2
V
IN
0.2
+0.2
Input capacitance
27
pF
Input leakage current
500
pA
SYSTEM PERFORMANCE
Resolution
14
Bits
No missing codes
Integral linearity(2)
14
Bits
LSB(3)
LSB(3)
1.5
±
0.75
±
0.75
±
0.2
±
0.2
1.5
Differential linearity
Offset error(4)
Gain error(4)
1
1.5
External reference
1.5
1.5
mV
External reference
1
1
mV
Common-mode rejection ratio
With common mode input signal = 200
mVpp at 1 MHz
60
dB
Power supply rejection
At 3FF0H output code,
+VA = 4.75 V to 5.25 V , Vref = 2.50 V
80
dB
SAMPLING DYNAMICS
Conversion time
+VDB = 5 V
+VDB = 3 V
+VDB = 5 V
+VDB = 3 V
255
273
273
nsec
nsec
nsec
nsec
MHz
nsec
psec
nsec
nsec
Acquisition time
60
60
78
Maximum throughput rate
Aperture delay
Aperture jitter
Step response
Over voltage recovery
DYNAMIC CHARACTERISTICS
3
2
20
50
50
VIN = 2.496 Vpp at 100 kHz/2.5 Vref
VIN = 2.496 Vpp at 1 MHz/2.5 Vref
VIN = 2.496 Vpp at 1.4 MHz/2.5 Vref
VIN = 2.496 Vpp at 100 kHz/2.5 Vref
VIN = 2.496 Vpp at 1 MHz/2.5 Vref
VIN = 2.496 Vpp at 1.4 MHz/2.5 Vref
VIN = 2.496 Vpp at 100 kHz/2.5 Vref
VIN = 2.496 Vpp at 1 MHz/2.5 Vref
VIN = 2.496 Vpp at 1.4 MHz/2.5 Vref
VIN = 2.496 Vpp at 1 MHz/2.5 Vref
93
88.5
79.5
78.5
Total harmonic distortion(5)
87
dB
SNR
78
75
78
77
dB
SINAD
dB
73.8
90
50
SFDR
3 dB Small signal bandwidth
EXTERNAL REFERENCE INPUT
Input VREF range
Resistance(6)
(1)Ideal input span; does not include gain or offset error.
(2)This is endpoint INL, not best fit.
(3)LSB means least significant bit.
(4)Measured relative to actual measured reference.
(5)Calculated on the first nine harmonics of the input frequency.
(6)Can vary
±
20%.
88
dB
MHz
2.4
2.5
500
2.6
V
k
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參數(shù)描述
ADS7891EVM 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 ADS7891 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V
ADS7891IPFBR 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 2.7-5.25V Digital 5V Analog 14 Bit RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS7891IPFBRG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 2.7-5.25V Digital 5V Analog 14 Bit RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS7891IPFBT 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 2.7-5.25V Digital 5V Analog 14 Bit RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS7891IPFBTG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 2.7-5.25V Digital 5V Analog 14 Bit RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
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