參數資料
型號： ADS1601IPFBT
廠商： Texas Instruments
文件頁數： 8/29頁
文件大?。?/td> 0K
描述： IC ADC 16BIT 1.25MSPS 48-TQFP
產品培訓模塊： Data Converter Basics
視頻文件： Nuts and Bolts of the Delta-Sigma Converter
標準包裝： 1
位數： 16
采樣率（每秒）： 1.25M
數據接口： 串行
轉換器數目： 1
功率耗散（最大）： 380mW
電壓電源： 模擬和數字
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 48-TQFP
供應商設備封裝： 48-TQFP（7x7）
包裝： 標準包裝
輸入數目和類型： 1 個差分，雙極
產品目錄頁面： 890 (CN2011-ZH PDF)
配用： 296-17825-ND - EVALUATION MODULE FOR ADS1601
其它名稱： 296-17631-6
S
1
S
2
10pF
AINP
ADS1601
8pF
VMID
S
1
S
2
10pF
AINN
8pF
VMID
AGND
392W
OPA2822
ADS1601
AGND
OPA2822
40pF
V
CM
(1)
V
CM
(1)
V
CM
(1)
100pF
AINP
AINN
100pF
(3)
392W
40pF
100pF
(2)
392W
0.01 F
m
0.01 F
m
392W
1 F
m
392W
1kW
1 F
m
392W
49.9W
-
V
IN
2
+V
CM
V
IN
2
+V
CM
On
S
1
S
2
Off
On
Off
t
=
f
SAMPLE
CLK
1/
ADS1601
THS4503
22pF
-VIN
+V
IN
100pF
AINP
AINN
100pF
24.9W
392W
24.9W
392W
22pF
V
CM
SBAS322D
– DECEMBER 2004 – REVISED OCTOBER 2011
INPUT CIRCUITRY
drivers close to the inputs and use good capacitor
bypass techniques on their supplies, such as a
The ADS1601 uses switched-capacitor circuitry to
smaller high-quality ceramic capacitor in parallel with
measure the input voltage. Internal capacitors are
a larger capacitor. Keep the resistances used in the
charged by the inputs and then discharged internally
driver circuits low
—thermal noise in the driver circuits
with this cycle repeating at the frequency of CLK.
degrades the overall noise performance. When the
Figure 36 shows a conceptual diagram of these
signal can be ac-coupled to the ADS1601 inputs, a
circuits. Switches S2 represent the net effect of the
simple RC filter can set the input common-mode
modulator
circuitry
in
discharging
the
sampling
voltage.
The
ADS1601
is
a
high-speed,
capacitors; the actual implementation is different. The
high-performance ADC. Special care must be taken
timing for switches S1 and S2 is shown in Figure 37.
when selecting the test equipment and setup used
with this device. Pay particular attention to the signal
sources to ensure they do not limit performance when
measuring the ADS1601.
Figure 36. Conceptual Diagram of Internal
Circuitry Connected to the Analog Inputs
(1) Recommended VCM = 2.7V.
(2) Optional ac-coupling circuit provides common-mode input
voltage.
(3) Increase to 390pF when fIN ≤ 100kHz for improved SNR and
THD.
Figure 38. Recommended Driver Circuit Using
the OPA2822
Figure 37. Timing for the Switches in Figure 36
DRIVING THE INPUTS
The external circuits driving the ADS1601 inputs must
be able to handle the load presented by the switching
capacitors within the ADS1601. The input switches S1
in Figure 36 are closed for approximately one-half of
the sampling period, tSAMPLE, allowing only 24ns for
the internal capacitors to be charged by the inputs
when fCLK = 20MHz.
Figure 38 and Figure 39 show the recommended
circuits when using single-ended or differential op
amps, respectively. The analog inputs must be driven
Figure 39. Recommended Driver Circuit Using
differentially to achieve optimum performance. The
the THS4503 Differential Amplifier
external capacitors, between the inputs and from
each input to AGND, improve linearity and should be
placed as close to the pins as possible. Place the
16
Copyright
2004–2011, Texas Instruments Incorporated
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相關代理商/技術參數
參數描述
ADS1601IPFBTG4 功能描述:模數轉換器 - ADC 16-Bit 1.25MSPS RoHS:否 制造商:Texas Instruments 通道數量: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
ADS1602EVM 功能描述:數據轉換 IC 開發(fā)工具 ADS1602EVM Eval Mod RoHS:否 制造商:Texas Instruments 產品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V
ADS1602IPFBR 功能描述:模數轉換器 - ADC 16-Bit 2.5MSPS RoHS:否 制造商:Texas Instruments 通道數量: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
ADS1602IPFBRG4 功能描述:模數轉換器 - ADC 16-Bit 2.5MSPS RoHS:否 制造商:Texas Instruments 通道數量: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
ADS1602IPFBT 功能描述:模數轉換器 - ADC 16-Bit 2.5MSPS RoHS:否 制造商:Texas Instruments 通道數量: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
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