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參數(shù)資料
| 型號： | AS1538-BTST |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | ADC |
| 英文描述： | 12-bit, 8-CH, 50ksps ADC, I2C; Package Type: TSSOP-16 |
| 封裝： | TSSOP-16 |
| 文件頁數(shù)： | 15/20頁 |
| 文件大小： | 746K |
| 代理商： | AS1538-BTST |
www.austriamicrosystems.com
Revision 1.03
15 - 20
AS1538/AS1540
Data Sheet - Application Information
Reading with Internal Reference On/Off
The internal reference defaults to off when the AS1538/AS1540 power is on. If the reference (internal or external) is
continuously turned on and off, a proper amount of settling time must be added before a normal conversion cycle can
be started. The exact amount of settling time needed varies depending on the reference capacitor. For example for a
reference capacitor of 4.7μF and considering the output impedance of the internal reference of 30
Ω
and the amount of
time to fully charge the capacitor will be 1.4ms. If the reference capacitor is not fully discharged this time can be
reduced greatly.
Figure 29
shows the correct internal reference enable sequence before issuing the typical read sequences required for
the mode when an internal reference is used.
Note:
Typical read sequences can be re-used once the internal reference has settled.
Figure 29. Internal Reference Enable Sequence and Typical Read Sequence
Where:
A: Acknowledge (SDA Low)
N: Not Acknowledge (SDA High)
S: START Condition
P: STOP Condition
Sr: Repeated START Condition
W: 0 (Write)
R: 1 (Read)
X: Dont Care
S
1
0
0
1
0
A1
A0
W
X
X
X
X
1
X
X
X
A
A
Write-Addressing Byte
Command Byte
Internal-Reference Enable Sequence
P
Wait until required settling time reached
From Master to Slave
From Slave to Master
Internal-Reference
Enable Settling Time
Sr
1
0
0
1
0
A1
A0
W
SD
C2
C1
C0
1
PD0
X
X
A
A
Write-Addressing Byte
Command Byte
ADC Powerdown Mode
ADC Sampling Mode
0
0
0
0
D11 D10 D9
D8
D7
A
D0
N
P
D6 ... D1
Sr
1
0
0
1
0
A1
A0
R
A
ADC Conversion Mode
ADC Powerdown Mode *
Read-Addressing Byte
2 x (8-bits +ACK/NACK
Settled Internal Reference
Typical Mode Read Sequence
**
* Dependant on powerdown selection
bits PD0 and PD1.
** To remain in HS mode, use repeated
STARTs instead of STOPs
Settled Internal Reference
S
I
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|---|---|
| AS1538BTSU | 制造商:AMS 功能描述:IC ADC 12BIT 50KSPS TSSOP-16 制造商:AMS 功能描述:IC, ADC, 12BIT, 50KSPS, TSSOP-16 制造商:AMS 功能描述:IC, ADC, 12BIT, 50KSPS, TSSOP-16; Resolution (Bits):12bit; 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 |
| AS1538-BTSU | 功能描述:模數(shù)轉(zhuǎn)換器 - 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| AS1538-EB | 制造商:ams 功能描述:AS1538 Evaluation Board |
| AS1538-TS_EK_ST | 功能描述:AS1538 - 12 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(zhuǎn)換器數(shù):1 位數(shù):12 采樣率（每秒）:50k 數(shù)據(jù)接口:I2C 輸入范圍:±0.3 V 不同條件下的功率（典型值）:- 使用的 IC/零件:AS1538 所含物品:板 標準包裝:1 |
| AS1539 | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:8/4-Channel, 10-Bit IC Analog-to-Digital Converter |
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