参数资料
型号: AD7870LPZ
厂商: Analog Devices Inc
文件页数: 23/28页
文件大小: 0K
描述: IC ADC 12BIT SAMPLING 3V 28-PLCC
产品变化通告: Conversion Time Change
标准包装: 1
位数: 12
采样率(每秒): 100k
数据接口: 串行,并联
转换器数目: 1
功率耗散(最大): 95mW
电压电源: 双 ±
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 28-LCC(J 形引线)
供应商设备封装: 28-PLCC(11.51x11.51)
包装: 管件
输入数目和类型: 1 个单端,双极
AD7870/AD7875/AD7876
Rev. C | Page 4 of
28
Parameter
J, A
K, B
L, C
T
Units
Test Conditions/Comments
CONVERSION TIME
External Clock (fCLK = 2.5 MHz)
8
μs max
Internal Clock6
6.5/9
μs min/
μs max
POWER REQUIREMENTS
VDD
+5
V nom
±5% for specified performance
VSS
5
V nom
±5% for specified performance
IDD
13
mA max
Typically 8 mA
ISS
6
mA max
Typically 4 mA
Power Dissipation
95
mW max
Typically 60 mW
1 The temperature range for the J, K, and L versions is from 0°C to +70°C; for the A, B, and C versions is40°C to +85°C; and for the T version is 55°C to +125°C.
2 VIN (p-p) = ±3 V.
3 SNR calculation includes distortion and noise components.
4 Measured with respect to internal reference and includes bipolar offset error.
5 Sample tested @ +25°C to ensure compliance.
6 Conversion time specification for the AD7870A device with internal clock used is 8 μs/10 μs minimum/maximum.
AD7875/AD7876 SPECIFICATIONS
Table 2.
Parameter
AD7875/AD78761
Units
Test Conditions/Comments
K, B
L, C
T
DC ACCURACY
Resolution
12
Bits
Min Resolution for which No Missing
Codes Are Guaranteed
12
Bits
Integral Nonlinearity @ +25°C
±1
±1/2
±1
LSB max
TMIN to TMAX (AD7875 Only)
±1
LSB max
TMIN to TMAX (AD7876 Only)
±1
±1/2
±1
LSB max
Differential Nonlinearity
±1
±1.5/1.0
LSB max
Unipolar Offset Error (AD7875 Only)
±5
LSB max
Bipolar Zero Error (AD7876 Only)
±6
±2
±6
LSB max
Full-Scale Error at +25°C2
±8
LSB max
Typical full-scale error is ±1 LSB
Full-Scale TC2
±60
±35
±60
ppm/°C max
Typical TC is ±20 ppm/°C
Track-and-Hold Acquisition Time
2
μs max
DYNAMIC PERFORMANCE3 (AD7875
ONLY)
Signal-to-Noise Ratio4 (SNR)
@ +25°C
70
72
69
dB min
VIN = 10 kHz sine wave, fSAMPLE = 100 kHz
TMIN to TMAX
70
71
69
dB min
Typically 71.5 dB for 0 < VIN < 50 kHz
Total Harmonic Distortion (THD)
80
78
dB max
VIN = 10 kHz sine wave, fSAMPLE = 100 kHz
Typically 86 dB for 0 < VIN < 50 kHz
Peak Harmonic or Spurious Noise
80
78
dB max
VIN = 10 kHz, fSAMPLE = 100 kHz
Typically 86 dB for 0 < VIN < 50 kHz
Intermodulation Distortion (IMD)
Second Order Terms
80
78
dB max
fa = 9 kHz, fb = 9.5 kHz, fSAMPLE = 50 kHz
Third Order Terms
80
78
dB max
fa = 9 kHz, fb = 9.5 kHz, fSAMPLE = 50 kHz
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