參數(shù)資料
型號： ADS8507I
英文描述： 16-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH INTERNAL REFERENCE AND PARALLEL/SERIAL INTERFACE
中文描述： 16位40 kSPS的低功耗采樣模擬到數(shù)字轉(zhuǎn)換的內(nèi)部基準(zhǔn)，并行/串行接口
文件頁數(shù)： 22/32頁
文件大?。?/td> 738K
代理商： ADS8507I
www.ti.com
Software Calibration
To calibrate the offset and gain in software, no external resistors are required. However, to get the data sheet
specifications for offset and gain, the resistors shown in
Figure 43
are necessary. See the No Calibration section
for more details on the external resistors. Refer to
Table 8
for the range of offset and gain errors with and
without the external resistors.
1
2
3
4
5
AGND2
CAP
REF
AGND1
+
2.2
μ
F
200
V
IN
R1
IN
R2
IN
6
66.5 k
+
2.2
μ
F
100
+ 5 V
1
2
3
4
5
AGND2
CAP
REF
AGND1
+
200
33.2 k
2.2
μ
F
6
R1
IN
R2
IN
100
V
IN
+
2.2
μ
F
1
2
3
4
5
AGND2
CAP
REF
AGND1
+
200
33.2 k
2.2
μ
F
6
R1
IN
R2
IN
100
V
IN
+
2.2
μ
F
±
10 V
0 V to 5 V
0 V to 4 V
No Calibration
Figure 43
shows circuit connections. Note that the actual voltage dropped across the external resistors is at
least two orders of magnitude lower than the voltage dropped across the internal resistor divider network. This
should be considered when choosing the accuracy and drift specifications of the external resistors. In most
applications, 1% metal-film resistors are sufficient.
ADS8507
SLAS381–DECEMBER 2006
Figure 43. Circuit Diagrams (Without Hardware Trim)
Table 8. Range of Offset and Gain Errors With and Without External Resistors
OFFSET ERROR
GAIN ERROR
INPUT
RANGE
(V)
WITH RESISTORS
RANGE (mV)
WITHOUT RESISTORS
RANGE (mV)
WITH RESISTORS
RANGE (% FS)
-0.4
≤
G
≤
0.4
0.15
≤
G
(1)
≤
0.15
-0.4
≤
G
≤
0.4
0.15
≤
G
(1)
≤
0.1
-0.4
≤
G
≤
0.4
-0.15
≤
G
(1)
≤
0.15
WITHOUT RESISTORS
RANGE (% FS)
-0.3
≤
G
≤
0.5
-0.1
≤
G
(1)
≤
0.2
-1.0
≤
G
≤
0.1
-0.55
≤
G
(1)
≤
-0.05
-1.0
≤
G
≤
0.1
-0.55
≤
G
(1)
≤
-0.05
TYP (mV)
TYP
0.05
0.05
-0.2
-0.2
-0.2
-0.2
±10
-10
≤
BPZ
≤
10
0
≤
BPZ
≤
35
15
0 to 5
-3
≤
UPO
≤
3
-12
≤
UPO
≤
-3
-7.5
0 to 4
-3
≤
UPO
≤
3
-10.5
≤
UPO
≤
-1.5
-6
(1)
High grade
The external resistors, see
Figure 43
, may not be necessary in some applications. These resistors provide
compensation for an internal adjustment of the offset and gain which allows calibration with a single supply. Not
using the external resistors results in offset and gain errors in addition to those listed in the electrical
characteristics section. Offset refers to the equivalent voltage of the digital output when converting with the input
grounded. A positive gain error occurs when the equivalent output voltage of the digital output is larger than the
analog input. Refer to
Table 8
for nominal ranges of gain and offset errors with and without the external
resistors. Refer to
Figure 44
for typical shifts in the transfer functions which occur when the external resistors are
removed.
22
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相關(guān)PDF資料
PDF描述
ADS8507IB 16-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH INTERNAL REFERENCE AND PARALLEL/SERIAL INTERFACE
ADS8507IBDW 16-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH INTERNAL REFERENCE AND PARALLEL/SERIAL INTERFACE
ADS8507IBDWG4 16-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH INTERNAL REFERENCE AND PARALLEL/SERIAL INTERFACE
ADS8507IBDWR 16-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH INTERNAL REFERENCE AND PARALLEL/SERIAL INTERFACE
ADS8507IBDWRG4 16-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH INTERNAL REFERENCE AND PARALLEL/SERIAL INTERFACE
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADS8507IB 制造商:BB 制造商全稱:BB 功能描述:16-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH INTERNAL REFERENCE AND PARALLEL/SERIAL INTERFACE
ADS8507IBDW 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16-Bit 40KSPS ADC 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
ADS8507IBDWG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16-Bit 40KSPS ADC 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
ADS8507IBDWR 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16-Bit 40KSPS ADC 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
ADS8507IBDWRG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16-Bit 40KSPS ADC 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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