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| 型号： | AD7946BRMZRL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 18/24页 |
| 文件大小： | 0K |
| 描述： | IC ADC 14BIT 500KSPS 10-MSOP |
| 标准包装： | 1,000 |
| 系列： | PulSAR® |
| 位数： | 14 |
| 采样率（每秒）： | 500k |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 19mW |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 1 个伪差分，单极 |
| 配用： | EVAL-AD7946CBZ-ND - BOARD EVALUATION FOR AD7946 |
AD7946
Rev. A | Page 3 of 24
SPECIFICATIONS
VDD = 4.5 V to 5.5 V, VIO = 2.3 V to VDD, REF = VDD, TA = 40°C to +85°C, unless otherwise noted.
Table 2.
Parameter
Conditions
Min
Typ
Max
Unit
RESOLUTION
14
Bits
ANALOG INPUT
Voltage Range
IN+ IN
0
REF
V
Absolute Input Voltage
IN+
0.1
VDD + 0.1
V
IN
0.1
V
Analog Input CMRR
fIN = 200 kHz
65
dB
Leakage Current at 25°C
Acquisition phase
1
nA
Input Impedance
See the Analog Input section
ACCURACY
No Missing Codes
14
Bits
Differential Linearity Error
0.7
±0.3
+0.7
LSB1
Integral Linearity Error
1
±0.4
+1
LSB
Transition Noise
REF = VDD = 5 V
0.33
LSB
±0.3
±6
LSB
Gain Error Temperature Drift
±1
ppm/°C
±0.3
±6
LSB
Offset Temperature Drift
±1
ppm/°C
Power Supply Sensitivity
VDD = 5 V ± 5%
±0.1
LSB
THROUGHPUT
Conversion Rate
0
500
kSPS
Transient Response
Full-scale step
400
ns
AC ACCURACY
Signal-to-Noise
fIN = 20 kHz, REF = 5 V
84.5
85
dB3
fIN = 20 kHz, REF = 2.5 V
84
dB
Spurious-Free Dynamic Range
fIN = 20 kHz
100
dB
Total Harmonic Distortion
fIN = 20 kHz
100
dB
Signal-to-(Noise + Distortion)
fIN = 20 kHz, REF = 5 V
84.5
85
dB
fIN = 20 kHz, REF = 5 V, 60 dB input
25
dB
Intermodulation Distortion4
100
dB
1 LSB means least significant bit. With the 5 V input range, one LSB is 305.2 μV.
2 See the Terminology section. These specifications do include full temperature range variation but do not include the error contribution from the external reference.
3 All specifications in dB are referred to a full-scale input, FS. Tested with an input signal at 0.5 dB below full scale, unless otherwise specified.
4 fIN1 = 21.4 kHz, fIN2 = 18.9 kHz, each tone at 7 dB below full scale.
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