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| 型號： | DDC118IRTCR |
| 英文描述： | Octal Current Input 20-Bit Analog-To-Digital Converter |
| 中文描述： | 八路電流輸入20位模擬數(shù)字轉(zhuǎn)換器 |
| 文件頁數(shù)： | 3/30頁 |
| 文件大?。?/td> | 384K |
| 代理商： | DDC118IRTCR |
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SBAS325A JUNE 2004 REVISED JUNE 2005
www.ti.com
3
ELECTRICAL CHARACTERISTICS
At TA = +25
°
C, AVDD = +5V, DVDD = 3V, VREF = +4.096V, Range 5 (250pC), and continuous mode operation, unless otherwise noted.
Low-Power Mode: TINT = 400
μ
s and CLK = 4MHz; High-Speed Mode: TINT = 320
μ
s and CLK = 4.8MHz.
Low-Power Mode
High-Speed Mode
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
ANALOG INPUT RANGE
Range 0
Range 1
Range 2
Range 3
Range 4
Range 5
Range 6
Range 7
Negative Full-Scale Range
Input Current
(2)
10.2
47.5
95
142.5
190
237.5
285
332.5
0.4% of Positive Full-Scale Range
12
50
100
150
200
250
300
350
13.8
52.5
105
157.5
210
262.5
315
367.5
(1)
pC
pC
pC
pC
pC
pC
pC
pC
pC
μ
A
750
DYNAMIC CHARACTERISTICS
Data Rate
2.5
3.125
kSPS
μ
S
μ
S
Integration Time, T
INT
Continuous Mode
400
50
1,000,000
320
Non-continuous Mode, Range 1 to 7
System Clock Input (CLK)
CLK_4X = 0
CLK_4X = 1
Data Clock (DCLK)
4
4.8
19.2
MHz
MHz
MHz
16
16
ACCURACY
Noise, Low-Level Input
(3)
C
SENSOR(4)
= 50pF, Range 5 (250pC)
5.2
6.5
5.5
7
ppm of
FSR
(5)
, rms
Integral Linearity Error
(6)
±
0.01% Reading
±
0.5ppm FSR, typ
±
0.025% Reading
±
1.0ppm FSR, max
20
16
0.1
0.1
1:1
±
400
±
100
±
0.05
±
25
11
±
10
Resolution
FORMAT = 1
FORMAT = 0
Bits
Bits
pA
Input Bias Current
Range Error Match
(7)
Range Sensitivity to VREF
Offset Error
Offset Error Match
(7)
DC Bias Voltage
(9)
Power-Supply Rejection Ratio
Internal Test Signal
Internal Test Accuracy
10
0.5
All Ranges
V
REF
= 4.096
±
0.1V
Range 5 (250pC)
% of FSR
±
1000
ppm of FSR
ppm of FSR
mV
ppm of FSR/V
pC
%
Low-Level Input (< 1% FSR)
at dc
±
2
±
200
PERFORMANCE OVER TEMPERATURE
Offset Drift
±
0.5
±
3
(8)
ppm of
FSR/
°
C
ppm of FSR/
minute
μ
V/
°
C
pA/
°
C
ppm/
°
C
Offset Drift Stability
±
0.2
±
1
(8)
DC Bias Voltage Drift
(9)
Input Bias Current Drift
Range Drift
(10)
3
T
A
= +25
°
C to +45
°
C
0.01
25
1
(8)
REFERENCE
Voltage
Input Current
(11)
4.000
4.096
150
4.200
V
μ
A
Average Value
190
(1)
indicates that specification is the same as Low-Power Mode.
(2)Exceeding maximum input current specification may damage device.
(3)Input is less than 1% of full scale.
(4)CSENSOR is the capacitance seen at the DDC118 inputs from wiring, photodiode, etc.
(5)FSR is Full-Scale Range.
(6)A best-fit line is used in measuring nonlinearity.
(7)Matching between side A and side B of the same input.
(8)Ensured by design, not production tested.
(9)Voltage produced by the DDC118 at its input which is applied to the sensor.
(10)Range drift does not include external reference drift.
(11)Input reference current decreases with increasing TINT (see the
Voltage Reference
section, page 11).
(12)Data format is Straight Binary with a small offset. The number of bits in the output word is controlled by the FORMAT pin (see text).
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| DDC118IRTCRG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Octal Current-Input 20-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 |
| DDC118IRTCT | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Octal Current-Input 20-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 |
| DDC118IRTCT | 制造商:Texas Instruments 功能描述:IC ADC 20BIT OCTAL 48-VQFN |
| DDC118IRTCT | 制造商:Texas Instruments 功能描述:A/D CONVERTER (A-D) IC ((NW)) |
| DDC118IRTCTG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Octal Current-Input 20-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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