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參數(shù)資料
| 型號： | AS1521-T |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | ADC |
| 英文描述： | 10-Bit, 8-Ch, 300ksps, ADC; Package Type: TSSOP-20 |
| 封裝： | TSSOP-20 |
| 文件頁數(shù)： | 23/29頁 |
| 文件大?。?/td> | 1043K |
| 代理商： | AS1521-T |
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Revision 1.00
23 - 29
AS1520/AS1521
Data Sheet
- Application Information
9 Application Information
Initialization
When power is first applied to the AS1520/AS1521 internal power-on reset circuitry sets the devices for normal opera-
tion. At this point, the devices can perform data conversions with CSN held low.
Note:
The device requires 10μs after the power supplies stabilize; no conversions should be initiated during this time.
The digital output at pin DOUT will be all 0s until an analog-to-digital conversion is initiated.
Serial Interface
The AS1520/AS1521 fully support SPI, QSPI, and Microwire interfaces. For SPI, select the correct clock polarity and
sampling edge in the SPI control registers (set CPOL = 0 and CPHA = 0).
Note:
Microwire, SPI, and QSPI all transmit a byte and receive a byte at the same time.
Using the circuit shown in
Figure 33 on page 24
, the simplest software interface requires only three 8-bit transfers to
perform a conversion (one 8-bit transfer to configure the AS1520/AS1521, and two more 8-bit transfers to clock out the
10-bit conversion result).
Serial Interface Configuration
The following steps describe how to configure the serial interface:
1. Confirm that the CPU serial interface is in master mode (so the CPU generates the serial clock).
2. Choose a clock frequency from 500kHz to 6.4MHz (AS1520) or 4.8MHz (AS1521).
3. Set up the control byte and call it TB1. TB1 should be in the format 1XXXXXXX binary, where the Xs indicate the
selected channel, conversion mode, and power mode.
4. Use a general-purpose I/O line on the CPU to pull CSN low.
5. Transmit TB1 and simultaneously receive a byte (RB1). Ignore this byte.
6. Transmit a byte of all zeros ($00
h
) and simultaneously receive byte RB2.
7. Transmit a byte of all zeros ($00
h
) and simultaneously receive byte RB3.
8. Pull CSN high.
Bytes RB2 and RB3 (see
Figure 21 on page 17
) contain the results of the conversion, padded with three leading zeros
and one trailing zero. The total conversion time is a function of the serial-clock frequency and the amount of idle time
between 8-bit transfers. To avoid excessive track/hold droop, make sure the total conversion time does not exceed
120μs.
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| AS1526-BSOT | 10-bit ADC 1-CH, 73ksps intRef; Package Type: SOIC-8 |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AS1522 | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:10-Bit, Single-Supply, Low-Power, 400/300ksps, 4-Channel A/D Converters |
| AS1522BTST | 制造商:AMS 功能描述:IC ADC 10BIT 400KSPS TSSOP-16 制造商:AMS 功能描述:IC, ADC, 10BIT, 400KSPS, TSSOP-16; Resolution (Bits):10bit; Sampling Rate:400kSPS; Supply Voltage Type:Single; Supply Voltage Min:4.5V; Supply Voltage Max:5.5V; Supply Current:3.3mA; Digital IC Case Style:TSSOP; No. of Pins:16 ;RoHS Compliant: Yes |
| AS1522-BTST | 功能描述:IC ADC 10BIT 4CH 400K 16-TSSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:250 系列:- 位數(shù):12 采樣率（每秒）:1.8M 數(shù)據(jù)接口:并聯(lián) 轉換器數(shù)目:1 功率耗散（最大）:1.82W 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-LQFP 供應商設備封裝:48-LQFP（7x7） 包裝:管件 輸入數(shù)目和類型:2 個單端，單極 |
| AS1522-T | 制造商:ams 功能描述:IC ADC 10BIT 4CH 400K 16-TSSOP 制造商:ams 功能描述:T&R / TSSOP 16 |
| AS1523 | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:10-Bit, Single-Supply, Low-Power, 400/300ksps, 4-Channel A/D Converters |
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