参数资料
| 型号： | AD7734BRU |
| 厂商： | Analog Devices Inc |
| 文件页数： | 20/32页 |
| 文件大小： | 0K |
| 描述： | IC ADC 24BIT 4-CH 28-TSSOP |
| 标准包装： | 1 |
| 位数： | 24 |
| 采样率（每秒）： | 15.4k |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 100mW |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 28-TSSOP |
| 包装： | 管件 |
| 输入数目和类型： | 4 个单端，单极；4 个单端，双极 |
| 配用： | EVAL-AD7734EBZ-ND - BOARD EVALUATION FOR AD7734 |
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Data Sheet
AD7734
Rev. A | Page 27 of 32
ANALOG INPUT’S EXTENDED VOLTAGE RANGE
The AD7734 output data code span corresponds to the nominal
input voltage range. The ADC is functional outside the nominal
input voltage range, but the performance might degrade. The
sigma-delta modulator was designed to fully cover a ±11.6 V
analog input voltage; outside this range, the performance might
degrade more rapidly. The adjacent channels are not affected by
up to ±16.5 V analog input voltage (Figure 8).
When the CLAMP bit in the mode register is set to 1, the
channel data register will be digitally clamped to either all 0s or
all 1s when the analog input voltage goes outside the nominal
input voltage range.
As shown in Table 16 and Table 17, when CLAMP = 0, the data
reflects the analog input voltage outside the nominal voltage
range. In this case, the SIGN and OVR bits in the channel status
register should be considered along with the data register value
to decode the actual conversion result.
Note that the OVR bit in the channel status register is generated
digitally from the conversion result and indicates the sigma-
delta modulator (nominal) overrange. The OVR bit DOES NOT
indicate exceeding the AIN pin’s absolute voltage limits
Table 16. Extended Input Voltage Range, Nominal Voltage
Range ±10 V, 16 Bits, CLAMP = 0
Input (V)
Data (hex)
SIGN
OVR
11.60039
147B
0
1
10.00061
0001
0
1
10.00031
0000
0
1
10.00000
FFFF
0
0.00031
8001
0
0.00000
8000
0
–0.00031
7FFF
1
0
–10.00000
0000
1
0
–10.00031
FFFF
1
–10.00061
FFFE
1
–11.60040
EB85
1
Table 17. Extended Input Voltage Range, Nominal Voltage
Range 0 V to +10 V, 16 Bits, CLAMP = 0
Input (V)
Data (hex)
SIGN
OVR
11.60006
28F5
0
1
10.00031
0001
0
1
10.00015
0000
0
1
10.00000
FFFF
0
0.00015
0001
0
0.00000
0000
0
–0.00015
0000
1
CHOPPING
With chopping enabled, the multiplexer repeatedly reverses the
ADC inputs. Every output data result is then calculated as an
average of two conversions, the first with the positive and the
second with the negative offset term included. This effectively
removes any offset error of the input buffer and sigma-delta
modulator.
However, chopping is applied only behind the input resistor
divider stage; therefore, chopping does not eliminate the offset
error and drifts caused by the resistors. Figure 24 shows the
channel signal chain with chopping enabled.
+
-
DIGITAL
INTERFACE
CHOP
fMCLK/2
BUFFER
MULTIPLEXER
DIGITAL
FILTER
SCALING
ARITHMETIC
(CALIBRATIONS)
OUTPUT DATA
AT THE SELECTED
DATA RATE
AI N
BI ASHI
BI AS
BI ASL O
Σ
MODULATOR
Figure 24. Channel Signal Chain Diagram with Chopping Enabled
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7734BRU-REEL | 制造商:Analog Devices 功能描述:ADC Single Delta-Sigma 3.05Msps 24-bit Serial 28-Pin TSSOP T/R 制造商:Analog Devices 功能描述:ADC SGL DELTA-SIGMA 15.437KSPS 24BIT SERL 28TSSOP - Tape and Reel |
| AD7734BRU-REEL7 | 制造商:Analog Devices 功能描述:ADC Single Delta-Sigma 3.05Msps 24-bit Serial 28-Pin TSSOP T/R 制造商:Analog Devices 功能描述:ADC SGL DELTA-SIGMA 15.437KSPS 24BIT SERL 28TSSOP - Tape and Reel |
| AD7734BRUZ | 功能描述:IC ADC 24BIT 4-CH 28-TSSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 其它有关文件:TSA1204 View All Specifications 标准包装:1 系列:- 位数:12 采样率（每秒）:20M 数据接口:并联 转换器数目:2 功率耗散（最大）:155mW 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:Digi-Reel® 输入数目和类型:4 个单端，单极；2 个差分，单极 产品目录页面:1156 (CN2011-ZH PDF) 其它名称:497-5435-6 |
| AD7734BRUZ | 制造商:Analog Devices 功能描述:IC 24BIT ADC SMD 7734 TSSOP28 |
| AD7734BRUZ-REEL | 功能描述:IC ADC 24BIT 4CH SIG-DEL 28TSSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:12 采样率（每秒）:300k 数据接口:并联 转换器数目:1 功率耗散（最大）:75mW 电压电源:单电源 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-SOIC（0.295"，7.50mm 宽） 供应商设备封装:24-SOIC 包装:带卷 (TR) 输入数目和类型:1 个单端，单极；1 个单端，双极 |
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