参数资料
型号: AD7880BRZ-REEL
厂商: Analog Devices Inc
文件页数: 9/16页
文件大小: 0K
描述: IC ADC 12BIT MONO LP 24-SOIC
标准包装: 1,000
位数: 12
采样率(每秒): 66k
数据接口: 并联
转换器数目: 1
功率耗散(最大): 50mW
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: 24-SOIC(0.295",7.50mm 宽)
供应商设备封装: 24-SOIC W
包装: 带卷 (TR)
输入数目和类型: 2 个单端,单极;2 个单端,双极
REV. 0
–2–
AD7880–SPECIFICATIONS
Parameter
B Versions
1
C Versions
1
Units
Test Conditions/Comments
DYNAMIC PERFORMANCE
2
Signal-to-Noise Ratio3 (SNR)
70
dB min
Typically SNR Is 72 dB
VIN = 1 kHz Sine Wave, fSAMPLE = 66 kHz
Total Harmonic Distortion (THD)
–80
dB typ
VIN = 1 kHz Sine Wave, fSAMPLE = 66 kHz
Peak Harmonic or Spurious Noise
–80
dB typ
VIN = 1 kHz, fSAMPLE = 66 kHz
Intermodulation Distortion (IMD)
Second Order Terms
–80
dB typ
fa = 0.983 kHz, fb = 1.05 kHz, fSAMPLE = 66 kHz
Third Order Terms
–80
dB typ
fa = 0.983 kHz, fb = 1.05 kHz, fSAMPLE = 66 kHz
DC ACCURACY
Resolution
12
Bits
All DC ACCURACY Specifications Apply for
the Three Analog Input Ranges
Integral Nonlinearity
±1
LSB max
Differential Nonlinearity
±1
LSB max
Guaranteed Monotonic
Full-Scale Error
±15
±5
LSB max
Bipolar Zero Error
±10
±5
LSB max
Unipolar Offset Error
±5
LSB max
ANALOG INPUT
Input Voltage Ranges
0 to VREF
Volts
See Figure 5
0 to 2 VREF
Volts
See Figure 6
±V
REF
±V
REF
Volts
See Figure 7
Input Resistance
10
M
min
0 to VREF Range
5/12
k
min/max
8 k
typical: 0 to 2 V
REF Range
5/12
k
min/max
8 k
typical: ±V
REF Range
REFERENCE INPUT
VREF (For Specified Performance)
5
V
±5%: Normally V
REF = VDD (See Reference Input Section)
IREF
1.5
mA max
Nominal Reference Range
2.5/VDD
V min/max
See Figure 3 for Degradation in Performance Down to 2.5 V
LOGIC INPUTS
CONVST
, RD, CS, CLKIN
Input High Voltage, VINH
2.4
V min
Input Low Voltage, VINL
0.8
V max
Input Current, IIN
±10
A max
VIN = 0 V or VDD
Input Capacitance, CIN
4
10
pF max
MODE INPUT
Input High Voltage, VINH
4
V min
Input Low Voltage, VINL
1
V max
Input Current, IIN
±125
A max
VIN = 0 V or VDD
Input Capacitance, CIN
4
10
pF max
LOGIC OUTPUTS
DB11–DB0, BUSY
Output High Voltage, VOH
4.0
V min
ISOURCE = 400 A
Output Low Voltage, VOL
0.4
V max
ISINK = 1.6 mA
DB11–DB0
Floating-State Leakage Current
±10
A max
Floating-State Output Capacitance
4
10
pF max
CONVERSION
Conversion Time
12
s max
fCLKIN = 2.5 MHz
Track/Hold Acquisition Time
3
s max
POWER REQUIREMENTS
VDD
+5
V nom
±5% for Specified Performance
IDD
Normal Power Mode @ +25
°C
7.5
mA max
Typically 4 mA; MODE = VDD
TMIN to TMAX
10
mA max
Typically 5 mA; MODE = VDD
Power Save Mode @ +25
°C
750
A max
Logic Inputs @ 0 V or VDD; MODE = 0 V
TMIN to TMAX
1
mA max
Logic Inputs @ 0 V or VDD; MODE = 0 V
Power Dissipation
Normal Power Mode @ +25
°C
37.5
mW max
VDD = 5 V: Typically 20 mW; MODE = VDD
TMIN to TMAX
50
mW max
VDD = 5 V: Typically 25 mW; MODE = VDD
Power Save Mode @ +25
°C
3.75
mW max
VDD = 5 V: Typically 2 mW; MODE = 0 V
TMIN to TMAX
5
mW max
VDD = 5 V: Typically 2.5 mW; MODE = 0 V
NOTES
1Temperature ranges are as follows: B/C Versions, –40
°C to +85°C.
2V
IN = 0 to VREF
3SNR calculation includes distortion and noise components.
4Sample tested @ +25
°C to ensure compliance.
Specifications subject to change without notice.
(VDD = +5 V
5%, VREF = VDD, AGND = DGND = O V, fCLKIN = 2.5 MHz, MODE = VDD
unless otherwise noted. All Specifications TMIN to TMAX unless otherwise noted.)
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