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參數資料
| 型號： | TLC5540CPWR |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 8-BIT HIGH-SPEED ANALOG-TO-DIGITAL CONVERTER |
| 中文描述： | 8位高速模擬數字轉換器 |
| 文件頁數： | 13/18頁 |
| 文件大?。?/td> | 230K |
| 代理商： | TLC5540CPWR |
SLAS105D JANUARY 1995 REVISED APRIL 2004
www.ti.com
13
PRINCIPLES OF OPERATION
internal reference voltage conversion
Three internal resistors allow the device to generate an internal reference voltage. These resistors are brought
out on terminals V
DDA
, REFTS, REFT, REFB, REFBS, and AGND. Two different bias voltages are possible
without the use of external resistors.
Internal resistors are provided to develop REFT = 2.6 V and REFB = 0.6 V (bias option one) with only two
external connections. This is developed with a 3-resistor network connected to V
DDA
. When using this feature,
connect REFT to REFTS and connect REFB to REFBS. For applications where the variance associated with
V
DDA
is acceptable, this internal voltage reference saves space and cost (see Figure 14).
A second internal bias option (bias two option) is shown in Figure 15. Using this scheme REFB = AGND and
REFT = 2.28 V nominal. These bias voltage options can be used to provide the values listed in the following
table.
Table 1. Bias Voltage Options
BIAS OPTION
BIAS VOLTAGE
VRT
2.63
VRB
0.61
VRT VRB
2.02
1
2
AGND
2.28
2.28
To use the internally-generated reference voltage, terminal connections should be made as shown in
Figure 14 or Figure 15. The connections in Figure 14 provide the standard video 2-V reference.
R1
320
NOM
Rref
270
NOM
R2
80
NOM
VDDA
5 V (Analog)
REFTS
REFT
REFB
REFBS
AGND
TLC5540
16
17
22
21
23
18
0.1
μ
F
0.1
μ
F
2.63 V dc
0.61 V dc
Figure 14. External Connections Using the Internal Bias One Option
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TLC5540CPWRG4 | 功能描述:模數轉換器 - ADC 8-Bit 40 MSPS 1-Ch Internal S&H Lo Pwr RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TLC5540EVM | 功能描述:數據轉換 IC 開發(fā)工具 TLC5540 Eval Mod RoHS:否 制造商:Texas Instruments 產品: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 |
| TLC5540INS | 功能描述:模數轉換器 - ADC 8B,40MSPS ADC Sgl Ch Internal S&H,Lo Pwr RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TLC5540INS | 制造商:Texas Instruments 功能描述:IC 8BIT ADC SMD 5540 SOIC24 |
| TLC5540INSG4 | 功能描述:模數轉換器 - ADC 8B,40 MSPS ADC RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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