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參數(shù)資料
| 型號(hào)： | AS1528-BTDT |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | ADC |
| 英文描述： | μPower 10-Bit 1-CH 150ksps TD; Package Type: TDFN(3x3)-8 |
| 中文描述： | 微功率，10位，150ksps器，ADC，單端或差分 |
| 封裝： | TDFN(3x3)-8 |
| 文件頁(yè)數(shù)： | 10/21頁(yè) |
| 文件大?。?/td> | 619K |
| 代理商： | AS1528-BTDT |
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www.austriamicrosystems.com
Revision 1.02
10 - 21
AS1528/AS1529
Datasheet - Detailed Description
8 Detailed Description
The AS1528/AS1529 employ a successive approximation conversion (SAR) technique and integrated track/hold cir-
cuitry to convert analog signals into 10-bit digital output. The serial interface provides easy interfacing to microproces-
sors.
Figure 17
shows the simplified internal structure for the AS1529 (2-channels, single ended) and the AS1528
(1-channel, true differential).
True Differential Analog Input Track/Hold
The equivalent circuit of
Figure 17
shows the device input architecture which is composed of track/hold circuitry, input
multiplexer, comparator, and switched-capacitor DAC. The track/hold circuitry enters its tracking mode on the rising
edge of CNVST. The positive input capacitor is connected to AIN1 or AIN2 (AS1529) or AIN+ (AS1528). The negative
input capacitor is connected to GND (AS1529) or AIN- (AS1528).
Figure 17. Equivalent Input Circuit
The track/hold circuitry enters its hold mode on the falling edge of CNVST and the difference between the sampled
positive and negative input voltages is converted. The time required for the track/hold to acquire an input signal is
determined by how quickly its input capacitance is charged. If the input signal’s source impedance is high, the acquisi-
tion time lengthens, and CNVST must be held high for a longer period of time. The acquisition time (
tACQ)
is the maxi-
mum time needed for the signal to be acquired, plus the power-up time.
tACQ
is calculated by:
t
ACQ
= 9 x (R
S
+ R
IN
) x 20pF + t
PWR
Where:
R
S
is the source impedance of the input signal;
R
IN
= 1.5k
Ω
;
t
PWR
of 1μs is the power-up time of the device.
(EQ 1)
Note:
tACQ
is never less than 1.4μs and any source impedance below 300. does not significantly affect the AS1528/
AS1529 AC performance. A high-impedance source can be accommodated either by lengthening
tACQ
or by
placing a 1μF capacitor between the positive and negative analog inputs.
Selecting AIN1 or AIN2 (AS1529)
Select one of the AS1529 two positive input channels using the CNVST pin
(see page 3)
. If AIN1 is selected
(see Fig-
ure 18)
, drive CNVST high to power up the AS1529 and place the track/hold circuitry in track mode with AIN1 con-
nected to the positive input capacitor. Hold CNVST high for
tACQ
to fully acquire the signal. Drive CNVST low to place
the track/hold circuitry in hold mode. The AS1529 then performs a conversion and shutdown automatically. The MSB is
available at DOUT after 3.7μs. Data can then be clocked out using SCLK. Clock out all 12 bits of data before driving
CNVST high for the next conversion. If all 12 bits of data are not clocked out before CNVST is driven high, AIN2 is
selected for the next conversion.
–
+
Comparator
Hold
Hold
10-Bit Capacitive DAC
Track
AIN2
AIN1/AIN+
V
DD/2
R
IN-
C
IN+
REF
GND
GND/AIN-
C
IN-
Hold
R
IN+
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AS1529-BTDT | μPower 10-Bit 2-CH 150ksps SE; Package Type: TDFN(3x3)-8 |
| AS1531-T | 12-Bit, 8-Channels ADC 300ksps; Package Type: TSSOP-20 |
| AS1530-T | 12-Bit, 8-Channels ADC 400ksps; Package Type: TSSOP-20 |
| AS1532-T | 12-Bit, 4-CH, ADC 400ksps; Package Type: TSSOP-16 |
| AS1533-T | 12-Bit, 4-CH, ADC, 300ksps; Package Type: TSSOP-16 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AS1529 | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:Micro-Power, 10-Bit, 150ksps, ADC, Single Ended or Differential |
| AS1529-BTDR | 功能描述:IC A/D 10-BIT 2-CH 150K 8-TDFN RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:microPOWER™ 位數(shù):8 采樣率（每秒）:1M 數(shù)據(jù)接口:串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:- 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-VQFN 裸露焊盤（4x4） 包裝:Digi-Reel® 輸入數(shù)目和類型:8 個(gè)單端，單極 產(chǎn)品目錄頁(yè)面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6 |
| AS1529BTDT | 制造商:AMS 功能描述:IC ADC 10BIT 150KSPS TDFN-8 制造商:AMS 功能描述:IC, ADC, 10BIT, 150KSPS, TDFN-8; Resolution (Bits):10bit; Sampling Rate:150kSPS; Supply Voltage Type:Single; Supply Voltage Min:2.7V; Supply Voltage Max:5.25V; Supply Current:485A; Digital IC Case Style:DFN; No. of Pins:8 ;RoHS Compliant: Yes |
| AS1529-BTDT | 功能描述:IC ADC 10BIT 2CH 150K 8-TDFN RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)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(zhuǎn)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(yīng)商設(shè)備封裝:48-LQFP（7x7） 包裝:管件 輸入數(shù)目和類型:2 個(gè)單端，單極 |
| AS152R3FLF | 制造商:TT Electronics / IRC 功能描述:AS152R3FLF |
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