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| 型号： | ADS1601IPFBR |
| 厂商： | Texas Instruments |
| 文件页数： | 10/29页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT 1.25MSPS 48-TQFP |
| 产品培训模块： | Data Converter Basics |
| 视频文件： | Nuts and Bolts of the Delta-Sigma Converter |
| 标准包装： | 1,000 |
| 位数： | 16 |
| 采样率（每秒）： | 1.25M |
| 数据接口： | 串行 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 380mW |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-TQFP |
| 供应商设备封装： | 48-TQFP（7x7） |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 1 个差分，双极 |
| 配用： | 296-17825-ND - EVALUATION MODULE FOR ADS1601 |
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10 F
m
0.1 F
m
0.1 F
m
10 F
m
0.1 F
m
10 F
m
0.1 F
m
0.1 F
m
VREFP
VMID
VCAP
VREFN
392W
OPA2822
ADS1601
0.001 F
m
4V
392W
OPA2822
0.001 F
m
1V
392W
OPA2822
0.001 F
m
2.5V
AGND
+0.94V
2
1
REF
-
15
-0.94V
2
1
REF
-
15
-
REF
0.94V
2
1
-
15
(
)
-
REF
0.94V
2
1
-
15
(
)
SBAS322D
– DECEMBER 2004 – REVISED OCTOBER 2011
Table 1. Maximum Allowable Clock Source Jitter
for Different Input Signal Frequencies and
Amplitude
INPUT SIGNAL
MAXIMUM
MAXIMUM ALLOWABLE
FREQUENCY
AMPLITUDE
CLOCK SOURCE JITTER
500kHz
–0.5dB
6ps
500kHz
–20dB
60ps
100kHz
–0.5dB
30ps
100kHz
–20dB
300ps
DATA FORMAT
The
16-bit
output
data
are
in
binary
two
’s
complement format as shown in Table 2. When the
input is positive out-of-range, exceeding the positive
full-scale value of +0.94VREF, the output clips to all
7FFFh and the OTR output goes high.
Likewise, when the input is negative out-of-range by
going
below
the
negative
full-scale
value
of
–0.94VREF, the output clips to 8000h and the OTR
output goes high. The OTR remains high while the
input signal is out-of-range.
Figure 42. Recommended Buffer Circuit When
Using an External Reference
Table 2. Output Code versus Input Signal
INPUT SIGNAL (INP
–
IDEAL OUTPUT
CLOCK INPUT (CLK)
INN)
CODE(1)
OTR
≥ +0.94VREF (> 0dB)
7FFFh
1
The ADS1601 requires an external clock signal to be
–0.94VREF (0dB)
7FFFh
0
applied to the CLK input pin. The sampling of the
modulator is controlled by this clock signal. As with
001h
0
any high-speed data converter, a high quality clock is
essential for optimum performance. Crystal clock
0
0000h
0
oscillators are the recommended CLK source; other
sources, such as frequency synthesizers, are usually
FFFFh
0
inadequate. Make sure to avoid excess ringing on the
CLK input; keeping the trace as short as possible
helps.
8000h
0
Measuring high-frequency, large amplitude signals
requires tight control of clock jitter. The uncertainty
during sampling of the input from clock jitter limits the
8000h
1
maximum achievable SNR. This effect becomes more
pronounced
with
higher
frequency
and
larger
(1) Excludes effects of noise, INL, offset and gain errors.
magnitude
inputs.
Fortunately,
the
ADS1601
oversampling topology reduces clock jitter sensitivity
OUT-OF-RANGE INDICATION (OTR)
over that of Nyquist rate converters such as pipeline
If the output code exceeds the positive or negative
and successive approximation converters by a factor
full-scale, the out-of-range digital output OTR will go
of
√16.
high on the falling edge of SCLK. When the output
In order to not limit the ADS1601 SNR performance,
code returns within the full-scale range, OTR returns
keep the jitter on the clock source below the values
low on the falling edge of SCLK.
shown in Table 1. When measuring lower frequency
and lower amplitude inputs, more CLK jitter can be
tolerated. In determining the allowable clock source
jitter, select the worst-case input (highest frequency,
largest amplitude) that will be seen in the application.
18
Copyright
2004–2011, Texas Instruments Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADS1601IPFBRG4 | 功能描述:模数转换器 - ADC 16-Bit 1.25MSPS RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| ADS1601IPFBT | 功能描述:模数转换器 - ADC 16-Bit 1.25MSPS RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| ADS1601IPFBTG4 | 功能描述:模数转换器 - ADC 16-Bit 1.25MSPS RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| ADS1602EVM | 功能描述:数据转换 IC 开发工具 ADS1602EVM Eval Mod RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| ADS1602IPFBR | 功能描述:模数转换器 - ADC 16-Bit 2.5MSPS RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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