參數(shù)資料
型號(hào)： ADS7945SRTER
廠商： TEXAS INSTRUMENTS INC
元件分類： ADC
英文描述： 2-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PQCC16
封裝： GREEN, PLASTIC, QFN-16
文件頁(yè)數(shù)： 47/49頁(yè)
文件大?。?/td> 1322K
代理商： ADS7945SRTER
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14
15
16
SCLK
CS
D13
SDO
t
SU1
t
D1
t
H1
t
D2
t
D3
Sample
N
Sample
N+1
t
ACQ
t
CONV
1/f
SAMPLE
DatafromSampleN
1
-
t
D4
t
WL
t
WH
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
t
W1
SBAS539B
– JUNE 2011 – REVISED SEPTEMBER 2011
PARAMETER MEASUREMENT INFORMATION
TIMING DIAGRAM: ADS7945, ADS7946
Table 1. TIMING REQUIREMENTS: ADS7945, ADS7946(1)(2)
PARAMETER
TEST CONDITIONS(2)
MIN
TYP
MAX
UNIT
tCONV
Conversion time
16
SCLK
tACQ
Acquisition time
80
ns
SCLK = 40 MHz,
fSAMPLE
Sample rate (throughput rate)
2
MSPS
16-clock frame
tW1
Pulse width CS high
25
ns
DVDD = 1.8 V
14.5
ns
tD1
Delay time, CS low to first data (D0-15) out
DVDD = 3 V
12.5
ns
DVDD = 5 V
8.5
ns
DVDD = 1.8 V
3.5
ns
tSU1
Setup time, CS low to first rising edge of SCLK
DVDD = 3 V
3.5
ns
DVDD = 5 V
3.5
ns
DVDD = 1.8 V
11
ns
tD2
(3)
Delay time, SCLK falling to SDO
DVDD = 3 V
9
ns
DVDD = 5 V
7.1
ns
DVDD = 1.8 V
4
ns
tH1
Hold time, SCLK falling to data valid
DVDD = 3 V
3
ns
DVDD = 5 V
2
ns
DVDD = 1.8 V
15
ns
tD3
Delay time, CS high to SDO 3-state
DVDD = 3 V
12.5
ns
DVDD = 5 V
8.5
ns
Delay time CS rising edge from conversion end
10
tD4
ns
(refer to the tCONV specification for conversion time)
tWH
Pulse duration, SCLK high
8
ns
tWL
Pulse duration, SCLK low
8
ns
SCLK frequency
40
MHz
tPDSU
Setup time, PDEN high to CS rising edge
2
ns
(refer to Figure 84 and Figure 85)
tPDH
Hold time, CS rising edge to PDEN falling edge (refer to Figure 84)
20
ns
(1)
All specifications are ensured by simulations at TA = –40°C to +125°C, and DVDD = 1.65 V to AVDD, unless otherwise noted.
(2)
1.8 V specifications apply from 1.65 V to 2 V; 3 V specifications apply form 2.7 V to 3.6 V; 5 V specifications apply from 4.75 V to
5.25 V.
(3)
With 20 pF load.
Copyright
2011, Texas Instruments Incorporated
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Product Folder Link(s): ADS7945 ADS7946
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADS7945SRTET 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 14B,2MSPS,DUAL-CH, UNIPOLAR,DIF,SAR 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS7946 制造商:TI 制造商全稱:Texas Instruments 功能描述:14-Bit, 2 MSPS, Dual-Channel, Differential/Single-Ended, Ultralow-Power Analog-to-Digital Converters
ADS7946EVM-PDK 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 ADS7946 PERF DEM KIT RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評(píng)估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V
ADS7946SRTER 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 14B,2MSPS,DUAL-CH, UNIP,PSE-DIF,SAR 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS7946SRTET 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 14B,2MSPS,DUAL-CH, UNIP,PSE-DIF,SAR 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
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