参数资料
型号: AD7478ARTZ-500RL7
厂商: Analog Devices Inc
文件页数: 24/25页
文件大小: 0K
描述: IC ADC 8BIT 1MSPS LP SOT23-6
标准包装: 500
位数: 8
采样率(每秒): 1M
数据接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
转换器数目: 1
功率耗散(最大): 17.5mW
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: SOT-23-6
供应商设备封装: SOT-23-6
包装: 带卷 (TR)
输入数目和类型: 1 个单端,单极
AD7476/AD7477/AD7478
Rev. F | Page 7 of 24
AD7478 SPECIFICATIONS
VDD = 2.7 V to 5.25 V, fSCLK = 20 MHz, TA = TMIN to TMAX, unless otherwise noted.
Table 3.
Parameter
A Version1,2
Unit
Test Conditions/Comments
DYNAMIC PERFORMANCE
fIN = 100 kHz sine wave, fSAMPLE = 1 MSPS
Signal-to-(Noise + Distortion) (SINAD)3
49
dB min
Total Harmonic Distortion (THD)3
65
dB max
Peak Harmonic or Spurious Noise (SFDR)3
65
dB max
Intermodulation Distortion (IMD)3
Second-Order Terms
68
dB typ
fa = 498.7 kHz, fb = 508.7 kHz
Third-Order Terms
68
dB typ
fa = 498.7 kHz, fb = 508.7 kHz
Aperture Delay
10
ns typ
Aperture Jitter
30
ps typ
Full Power Bandwidth
6.5
MHz typ
@ 3 dB
DC ACCURACY
Resolution
8
Bits
Integral Nonlinearity3
±0.5
LSB max
Differential Nonlinearity3
±0.5
LSB max
Guaranteed no missed codes to eight bits
Offset Error
±0.5
LSB max
Gain Error
±0.5
LSB max
Total Unadjusted Error (TUE)
±0.5
LSB max
ANALOG INPUT
Input Voltage Ranges
0 to VDD
V
DC Leakage Current
±1
μA max
Input Capacitance
30
pF typ
LOGIC INPUTS
Input High Voltage, VINH
2.4
V min
Input Low Voltage, VINL
0.8
V max
VDD = 5 V
0.4
V max
VDD = 3 V
Input Current, IIN, SCLK Pin
±1
μA max
Typically 10 nA, VIN = 0 V or VDD
Input Current, IIN, CS Pin
±1
μA typ
Input Capacitance, CIN4
10
pF max
LOGIC OUTPUTS
Output High Voltage, VOH
VDD 0.2
V min
ISOURCE = 200 μA, VDD = 2.7 V to 5.25 V
Output Low Voltage, VOL
0.4
V max
ISINK = 200 μA
Floating-State Leakage Current
±10
μA max
Floating-State Output Capacitance4
10
pF max
Output Coding
Straight (Natural) Binary
CONVERSION RATE
Conversion Time
800
ns max
16 SCLK cycles with SCLK at 20 MHz
Track-and-Hold Acquisition Time
400
ns max
Throughput Rate
1
MSPS max
POWER REQUIREMENTS
VDD
2.7/5.25
V min/max
IDD
Digital I/Ps = 0 V or VDD
Normal Mode (Static)
2
mA typ
VDD = 4.75 V to 5.25 V, SCLK on or off
1
mA typ
VDD = 2.7 V to 3.6 V, SCLK on or off
Normal Mode (Operational)
3.5
mA max
VDD = 4.75 V to 5.25 V, fSAMPLE = 1 MSPS
1.6
mA max
VDD = 2.7 V to 3.6 V, fSAMPLE = 1 MSPS
Full Power-Down Mode
1
μA max
SCLK off
80
μA max
SCLK on
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