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參數(shù)資料
| 型號： | ADS1610IPAPTG4 |
| 英文描述： | 16-Bit, 10 MSPS ANALOG-TO-DIGITAL CONVERTER |
| 中文描述： | 16位，10 MSPS的模擬數(shù)字轉換器 |
| 文件頁數(shù)： | 13/26頁 |
| 文件大小： | 555K |
| 代理商： | ADS1610IPAPTG4 |
www.ti.com
S
1
S
2
10pF
AINP
ADS1610
8pF
VMID
S
1
S
2
10pF
AINN
8pF
VMID
AGND
ADS1610
THS4503
10pF
V
IN
100pF
100pF
AINP
AINN
100pF
12.5
787
787
12.5
374
374
56.2
10 pF
V
CM
V
IN
5 .2
6
On
S1
S2
Off
On
Off
t
SAMPLE
= 1/f
CLK
DRIVING THE INPUTS
The external circuits driving the ADS1610 inputs
must be able to handle the load presented by the
switching capacitors within the ADS1610. The input
switches S
in
Figure 25
are closed approximately
one half of the sampling period, t
SAMPLE
, allowing
only ~8 ns for the internal capacitors to be charged
by the inputs, when f
CLK
= 60MHz.
Figure 27
and
Figure 28
show the recommended
circuits when using single-ended or differential op
amps, respectively. The analog inputs must be
driven differentially to achieve optimum performance.
If only a single-ended input signal is available, the
configuration in
Figure 27
can be used by shorting
–V
IN
to ground.
This configuration would implement the single-ended
to differential conversion.
392
OPA2822
ADS1610
AGND
OPA2822
20 pF
V
CM(1)
V
CM(1)
V
CM(1)
100pF
AINP
AINN
100pF
(3)
392
20 pF
100pF
(1) Recommended V
CM
= 2.5V.
(2) Optional accoupling circuit provides commonmode input voltage.
(3) Increase to 390pF when f
IN
≤
100kHz for improved SNR and THD.
(2)
(2)
(2)
(2)
V
IN
2
V
IN
2
392
392
392
0.01
μ
F
0.01
μ
F
392
1
μ
F
392
1k
1k
1
μ
F
392
12.5
12.5
ADS1610
SBAS344C–AUGUST 2005–REVISED OCTOBER 2006
driver circuits low-thermal noise in the driver circuits
degrades the overall noise performance. When the
signal can be AC-coupled to the ADS1610 inputs, a
simple RC filter can set the input common mode
voltage.
The
ADS1610
performance ADC. Special care must be taken 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 ADS1610.
is
a
high-speed,
high-
Figure 25. Conceptual Diagram of Internal
Circuitry Connected to the Analog Inputs
Figure 27. Recommended Single-Ended to
Differential Conversion Circuit Using the
THS4503 Differential Amplifier
Figure 26. Timing for the Switches in
Figure 25
The 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
drivers close to the inputs and use good capacitor
bypass techniques on their supplies; usually a
smaller high-quality ceramic capacitor in parallel with
a larger capacitor. Keep the resistances used in the
Figure 28. Recommended Driver Circuit Using
the OPA2822
13
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|---|---|
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| ADS1625IPAPRG4 | 功能描述:模數(shù)轉換器 - ADC 18-Bit 1.25MSPS 1-Ch Delta-Sigma Single RoHS:否 制造商:Texas Instruments 通道數(shù)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 |
| ADS1625IPAPT | 功能描述:模數(shù)轉換器 - ADC 18-Bit 1.25MSPS 1-Ch Delta-Sigma Single RoHS:否 制造商:Texas Instruments 通道數(shù)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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