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參數(shù)資料
| 型號： | AS1539-BTST |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | ADC |
| 英文描述： | 10-bit, 8-CH, 50ksps ADC, I2C; Package Type: TSSOP-16; Temperature Range: -40 - +85 °C; Output Interface: I"C; Supply Voltage: 2,70-5,50 |
| 封裝： | TSSOP-16 |
| 文件頁數(shù)： | 11/20頁 |
| 文件大?。?/td> | 744K |
| 代理商： | AS1539-BTST |
www.austriamicrosystems.com
Revision 1.03
11 - 20
AS1539/AS1541
Data Sheet - Detailed Description
Reference Voltage
The AS1539/AS1541 can operate with an internal 2.5V reference or an external reference. If a +5V supply is used, an
external +5V reference is required in order to provide full dynamic range for a 0V to +V
DD
analog input. The external
reference can be as low as 1V. When using a +2.7V supply, the internal +2.5V reference will provide full dynamic range
for a 0V to +2.5V analog input.
As the reference voltage is reduced, the analog voltage weight of each digital output code is reduced. This is often
referred to as the LSB (least significant bit) size and is equal to the reference voltage divided by 1024. This means that
any offset or gain error inherent in the A/D converter will appear to increase, in terms of LSB size, as the reference volt-
age is reduced.
Digital Interface
The AS1539/AS1541 supports the I
2
C serial bus and data transmission protocol in high-speed mode at 3.4MHz. The
AS1539/AS1541 operates as a slave on the I
2
C bus. The bus must be controlled by a master device that generates the
serial clock (SCL), controls the bus access, and generates the START and STOP conditions. Connections to the bus
are made via the open-drain I/O pins SCL and SDA.
Figure 24. Bus Protocol
The bus protocol (as shown in
Figure 24
) is defined as:
- Data transfer may be initiated only when the bus is not busy.
- During data transfer, the data line must remain stable whenever the clock line is HIGH. Changes in the data line
while the clock line is HIGH will be interpreted as control signals.
The bus conditions are defined as:
-
Bus Not Busy
. Data and clock lines remain HIGH.
-
Start Data Transfer
. A change in the state of the data line, from HIGH to LOW, while the clock is HIGH, defines a
START condition.
-
Stop Data Transfe
r. A change in the state of the data line, from LOW to HIGH, while the clock line is HIGH,
defines the STOP condition.
-
Data Valid
. The state of the data line represents valid data, when, after a START condition, the data line is stable
for the duration of the HIGH period of the clock signal. There is one clock pulse per bit of data.
Each data transfer is initiated with a START condition and terminated with a STOP condition. The number of data
bytes transferred between START and STOP conditions is not limited and is determined by the master device.
The information is transferred byte-wise and each receiver acknowledges with a ninth-bit.
Within the I
2
C bus specifications a high-speed mode (3.4MHz clock rate) is defined.
-
Acknowledge
: Each receiving device, when addressed, is obliged to generate an acknowledge after the recep-
tion of each byte. The master device must generate an extra clock pulse that is associated with this acknowledge
SDA
SCL
Slave Address
R/W
Direction Bit
START
1
2
6
7
8
9
1
2
3-8
8
9
ACK
MSB
Repeat if More Bytes Transferred
STOP or
Repeated
START
ACK from
Receiver
ACK from
Receiver
ACK
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相關代理商/技術參數(shù) |
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|---|---|
| AS1539BTSU | 制造商:AMS 功能描述:IC ADC 10BIT 50KSPS TSSOP-16 制造商:AMS 功能描述:IC, ADC, 10BIT, 50KSPS, TSSOP-16; Resolution (Bits):10bit; Sampling Rate:50kSPS; Supply Voltage Type:Single; Supply Voltage Min:2.7V; Supply Voltage Max:5.25V; Supply Current:850A; Digital IC Case Style:TSSOP; No. of Pins:16 ;RoHS Compliant: Yes |
| AS1539-BTSU | 功能描述:模數(shù)轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)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 |
| AS1539-EB | 制造商:ams 功能描述:AS1539 Evaluation Board |
| AS1539-TS_EK_ST | 功能描述:AS1539 - 10 Bit 50k Samples per Second Analog to Digital Converter (ADC) Evaluation Board 制造商:ams 系列:- 零件狀態(tài):過期 A/D 轉換器數(shù):1 位數(shù):10 采樣率（每秒）:50k 數(shù)據(jù)接口:I2C 輸入范圍:0 ~ VREF 不同條件下的功率（典型值）:- 使用的 IC/零件:AS1539 所含物品:板 標準包裝:1 |
| AS153R6FLF | 制造商:TT Electronics / IRC 功能描述:AS153R6FLF |
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