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| 型号： | ADS1601IPFBR |
| 厂商： | Texas Instruments |
| 文件页数： | 9/29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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S
1
ADS1601
S
2
VREFP
50pF
300W
S
1
VREFN
VREFP
VREFN
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
ADS1601
AGND
VREFP
VMID
VCAP
VREFN
SBAS322D
– DECEMBER 2004 – REVISED OCTOBER 2011
REFERENCE INPUTS (VREFN, VREFP, VMID)
EXTERNAL REFERENCE (REFEN = HIGH)
The ADS1601 can operate from an internal or
To use an external reference, set the REFEN pin
external
voltage
reference.
In
either
case,
the
high. This deactivates the internal generators for
reference voltage VREF is set by the differential
VREFP,
VREFN,
and
VMID,
and
saves
voltage
between
VREFN
and
VREFP:
VREF =
approximately 25mA of current on the analog supply
(VREFP
– VREFN). VREFP and VREFN each use
(AVDD). The voltages applied to these pins must be
two pins, which should be shorted together. VMID
within
the
values
specified
in
the
Electrical
equals approximately 2.5V and is used by the
Characteristics table. Typically, VREFP = 4V, VMID =
modulator. VCAP connects to an internal node and
2.5V, and VREFN = 1V. The external circuitry must
must also be bypassed with an external capacitor.
be capable of providing both a dc and a transient
current. Figure 41 shows a simplified diagram of the
internal circuitry of the reference when the internal
INTERNAL REFERENCE (REFEN = LOW)
reference is disabled. As with the input circuitry,
To use the internal reference, set the REFEN pin low.
switches S1 and S2 open and close as shown by the
This activates the internal circuitry that generates the
timing in Figure 37.
reference voltages. The internal reference voltages
are applied to the pins. Good bypassing of the
reference
pins
is
critical
to
achieve
optimum
performance and is done by placing the bypass
capacitors as close to the pins as possible. Figure 40
shows the recommended bypass capacitor values.
Use high-quality ceramic capacitors for the smaller
values. Avoid loading the internal reference with
external circuitry. If the ADS1601 internal reference is
to be used by other circuitry, buffer the reference
voltages to prevent directly loading the reference
pins.
Figure 41. Conceptual Internal Circuitry for the
Reference When REFEN = High
Figure 42 shows the recommended circuitry for
driving these reference inputs. Keep the resistances
used in the buffer circuits low to prevent excessive
thermal noise from degrading performance. Layout of
these circuits is critical; be sure to follow good
high-speed layout practices. Place the buffers, and
especially the bypass capacitors, as close to the pins
as possible. VCAP is unaffected by the setting on
REFEN and must be bypassed when using the
internal or an external reference.
Figure 40. Reference Bypassing When Using the
Internal Reference
Copyright
2004–2011, Texas Instruments Incorporated
17
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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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