参数资料
型号: AD7854LARSZ-REEL
厂商: Analog Devices Inc
文件页数: 12/28页
文件大小: 0K
描述: IC ADC 12BIT PARALLEL LP 28SSOP
标准包装: 1,500
位数: 12
采样率(每秒): 100k
数据接口: 并联
转换器数目: 2
功率耗散(最大): 30mW
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: 28-SSOP(0.209",5.30mm 宽)
供应商设备封装: 28-SSOP
包装: 带卷 (TR)
输入数目和类型: 1 个伪差分,单极;1 个伪差分,双极
Parameter
A Version
1
B Version
1
S Version
1
Units
Test Conditions/Comments
DYNAMIC PERFORMANCE
Signal to Noise + Distortion Ratio
3
70
71
70
dB min
Typically SNR is 72 dB
(SNR)
VIN = 10 kHz Sine Wave, fSAMPLE = 200 kHz
(L Version: fSAMPLE = 100 kHz @ fCLKIN = 2 MHz)
Total Harmonic Distortion (THD)
–78
dB max
VIN = 10 kHz Sine Wave, fSAMPLE = 200 kHz
(L Version: fSAMPLE = 100 kHz @ fCLKIN = 2 MHz)
Peak Harmonic or Spurious Noise
–78
dB max
VIN = 10 kHz Sine Wave, fSAMPLE = 200 kHz
(L Version: fSAMPLE = 100 kHz @ fCLKIN = 2 MHz)
Intermodulation Distortion (IMD)
Second Order Terms
–78
dB typ
fa = 9.983 kHz, fb = 10.05 kHz, fSAMPLE = 200 kHz
(L Version: fSAMPLE = 100 kHz @ fCLKIN = 2 MHz)
Third Order Terms
–78
dB typ
fa = 9.983 kHz, fb = 10.05 kHz, fSAMPLE = 200 kHz
(L Version: fSAMPLE = 100 kHz @ fCLKIN = 2 MHz)
DC ACCURACY
Resolution
12
Bits
Integral Nonlinearity
±1
±0.5
±1
LSB max
5 V Reference VDD = 5 V
Differential Nonlinearity
±1
LSB max
Guaranteed No Missed Codes to 12 Bits
Unipolar Offset Error
±3
±4
LSB max
±2
LSB typ
Unipolar Gain Error
±4
LSB max
±2
LSB typ
Bipolar Positive Full-Scale Error
±4
±5
LSB max
±2
LSB typ
Negative Full-Scale Error
±4
±5
LSB max
±2
LSB typ
Bipolar Zero Error
±4
±5
LSB max
ANALOG INPUT
Input Voltage Ranges
0 to VREF
Volts
i.e., AIN(+) – AIN(–) = 0 to VREF, AIN(–) can be
biased up but AIN(+) cannot go below AIN(–).
±VREF/2
Volts
i.e., AIN(+) – AIN(–) = –VREF/2 to +VREF/2, AIN(–)
should be biased to +VREF/2 and AIN(+) can go below
AIN(–) but cannot go below 0 V.
Leakage Current
±1
A max
Input Capacitance
20
pF typ
REFERENCE INPUT/OUTPUT
REFIN Input Voltage Range
2.3/VDD
V min/max
Functional from 1.2 V
Input Impedance
150
k
typ
REFOUT Output Voltage
2.3/2.75
2.3/2.7
V min/max
REFOUT Tempco
20
ppm/
°C typ
LOGIC INPUTS
Input High Voltage, VINH
3
V min
AVDD = DVDD = 4.5 V to 5.5 V
2.1
V min
AVDD = DVDD = 3.0 V to 3.6 V
Input Low Voltage, VINL
0.4
V max
AVDD = DVDD = 4.5 V to 5.5 V
0.6
V max
AVDD = DVDD = 3.0 V to 3.6 V
Input Current, IIN
±10
A max
Typically 10 nA, VIN = 0 V or VDD
Input Capacitance, CIN
4
10
pF max
LOGIC OUTPUTS
Output High Voltage, VOH
ISOURCE = 200
A
4
V min
AVDD = DVDD = 4.5 V to 5.5 V
2.4
V min
AVDD = DVDD = 3.0 V to 3.6 V
Output Low Voltage, VOL
0.4
V max
ISINK = 0.8 mA
Floating-State Leakage Current
±10
A max
Floating-State Output Capacitance
4
10
pF max
Output Coding
Straight (Natural) Binary
Unipolar Input Range
Twos Complement
Bipolar Input Range
CONVERSION RATE
tCLKIN
× 18
Conversion Time
4.6 (10)
4.6 (9)
s max
(L Versions Only, 0
°C to +70°C, 1.8 MHz CLKIN)
Track/Hold Acquisition Time
0.5 (1)
s min
(L Versions Only, –40
°C to +85°C, 1 MHz CLKIN)
AD7854/AD7854L–SPECIFICATIONS1, 2 (AV
DD = DVDD = +3.0 V to +5.5 V, REFIN/REFOUT = 2.5 V
External Reference, fCLKIN = 4 MHz (for L Version: 1.8 MHz (0 C to +70 C) and 1 MHz (–40 C to +85 C)); fSAMPLE = 200 kHz (AD7854), 100 kHz
(AD7854L); TA = TMIN to TMAX, unless otherwise noted.) Specifications in () apply to the AD7854L.
–2–
REV. B
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