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AD7870SQ Datenblatt(PDF) 3 Page - Analog Devices

Teilenummer AD7870SQ
Bauteilbeschribung  LC2MOS Complete, 12-Bit, 100 kHz, Sampling ADCs
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Hersteller  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7870SQ Datenblatt(HTML) 3 Page - Analog Devices

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AD7875/AD7876
Parameter
K, B
1
L, C
1
T
1
Units
Test Conditions/Comments
DC ACCURACY
Resolution
12
12
12
Bits
Minimum Resolution for Which
No Missing Codes Are Guaranteed
12
12
12
Bits
Integral Nonlinearity @ +25
°C
±1
±1/2
±1
LSB max
TMIN to TMAX (AD7875 Only)
±1
±1
±1
LSB max
TMIN to TMAX (AD7876 Only)
±1
±1/2
±1
LSB max
Differential Nonlinearity
±1
±1
±1.5/–1.0 LSB max
Unipolar Offset Error (AD7875 Only)
±5
±5
±5
LSB max
Bipolar Zero Error (AD7876 Only)
±6
±2
±6
LSB max
Full-Scale Error at +25
°C2
±8
±8
±8
LSB max
Typical Full-Scale Error Is
±1 LSB
Full-Scale TC
2
±60
±35
±60
ppm/
°C max
Typical TC is
±20 ppm/°C
Track/Hold Acquisition Time
2
2
2
µs max
DYNAMIC PERFORMANCE
3 (AD7875 ONLY)
Signal-to-Noise Ratio
4 (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
–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
–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
–80
–78
dB max
fa = 9 kHz, fb = 9.5 kHz, fSAMPLE = 50 kHz
Third Order Terms
–80
–80
–78
dB max
fa = 9 kHz, fb = 9.5 kHz, fSAMPLE = 50 kHz
ANALOG INPUT
AD7875 Input Voltage Range
0 to +5 0 to +5 0 to +5
Volts
AD7875 Input Current
500
500
500
µA max
AD7876 Input Voltage Range
±10
±10
±10
Volts
AD7876 Input Current
±600
±600
±600
µA max
REFERENCE OUTPUT
REF OUT @ +25
°C
2.99
2.99
2.99
V min
3.01
3.01
3.01
V max
REF OUT Tempco
±60
±35
±60
ppm/
°C max
Typical Tempco Is
±20 ppm/°C
Reference Load Sensitivity (
∆REF OUT/∆I)
–1
–1
–1
mV max
Reference Load Current Change (0
µA–500 µA)
Reference Load Should Not Be Changed
During Conversion.
LOGIC INPUTS
Input High Voltage, VINH
2.4
2.4
2.4
V min
VDD = 5 V ± 5%
Input Low Voltage, VINL
0.8
0.8
0.8
V max
VDD = 5 V ± 5%
Input Current, IIN
±10
±10
±10
µA max
VIN = 0 V to VDD
Input Current (12/
8/CLK Input Only)
±10
±10
±10
µA max
VIN = VSS to VDD
Input Capacitance, CIN
5
10
10
10
pF max
LOGIC OUTPUTS
Output High Voltage, VOH
4.0
4.0
4.0
V min
ISOURCE = 40 µA
Output Low Voltage, VOL
0.4
0.4
0.4
V max
ISINK = 1.6 mA
DB11–DB0
Floating-State Leakage Current
10
10
10
µA max
Floating-State Output Capacitance5
15
15
15
pF max
CONVERSION TIME
External Clock (fCLK = 2.5 MHz)
8
8
8
µs max
Internal Clock
7/9
7/9
7/9
µs min/µs max
POWER REQUIREMENTS
As per AD7870
NOTES
1Temperature ranges are as follows: AD7875: K, L Versions, 0
°C to +70°C; B, C Versions, –40°C to +85°C; T Version, –55°C to +125°C. AD7876: B, C Versions,
–40
°C to +85°C; T Version, –55°C to +125°C.
2Includes internal reference error and is calculated after unipolar offset error (AD7875) or bipolar zero error (AD7876) has been adjusted out.
Full-scale error refers to both positive and negative full-scale error for the AD7876.
3Dynamic performance parameters are not tested on the AD7876 but these are typically the same as for the AD7875.
4SNR calculation includes distortion and noise components.
5Sample tested @ +25
°C to ensure compliance.
Specifications subject to change without notice.
REV. B
AD7870/AD7875/AD7876
–3–


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