AD7891AP-1REEL Просмотр технического описания (PDF) - Analog Devices
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AD7891AP-1REEL Datasheet PDF : 20 Pages
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AD7891–SPECIFICATIONS (VDD = 5 V ؎ 5%, AGND = DGND = 0 V, REF IN = 2.5 V. All specifications TMIN to TMAX,
unless otherwise noted.)
Parameter
DYNAMIC PERFORMANCE2
A Version1 B Version Y Version Unit
Signal-to-(Noise + Distortion) Ratio4
@ 25∞C
70
70
70
dB min
TMIN to TMAX
70
70
70
dB min
Total Harmonic Distortion4
–78
–78
–78
dB max
Peak Harmonic or Spurious Noise4 –80
–80
–80
dB max
Intermodulation Distortion4
Second-Order Terms
–80
–80
–80
dB typ
Third-Order Terms
–80
–80
–80
dB typ
Channel-to-Channel Isolation4
–80
–80
–80
dB max
DC ACCURACY
Resolution
12
Minimum Resolution for which
No Missing Codes Are Guaranteed 12
Relative Accuracy4
±1
Differential Nonlinearity4
±1
Positive Full-Scale Error4
±3
Positive Full-Scale Error Match4, 5 0.6
Unipolar Offset Error
±4
Unipolar Offset Error Match5
0.1
Negative Full-Scale Error4
±3
Negative Full-Scale Error Match4, 5 0.6
Bipolar Zero Error
±4
Bipolar Zero Error Match5
0.2
12
12
12
12
± 0.75
±1
±1
±1
±3
±3
0.6
0.6
±4
±4
0.1
0.1
±3
±3
0.6
0.6
±4
±4
0.2
0.2
Bits
Bits
LSB max
LSB max
LSB max
LSB typ
LSB max
LSB typ
LSB max
LSB typ
LSB max
LSB typ
ANALOG INPUTS
AD7891-1 Input Voltage Range
AD7891-1 VINXA Input Resistance
AD7891-1 VINXA Input Resistance
AD7891-2 Input Voltage Range
AD7891-2 VINXA Input Resistance
AD7891-2 VINXA Input Current
REFERENCE INPUT/OUTPUT
REF IN Input Voltage Range
Input Impedance
Input Capacitance5
REF OUT Output Voltage
REF OUT Error @ 25∞C
TMIN to TMAX
REF OUT Temperature Coefficient
REF OUT Output Impedance
±5
± 10
7.5
15
0 to 2.5
0 to 5
± 2.5
1.5
± 50
±5
± 10
7.5
15
0 to 2.5
0 to 5
± 2.5
1.5
± 50
±5
± 10
7.5
15
0 to 2.5
0 to 5
± 2.5
1.5
± 50
V
V
kW min
kW min
V
V
V
kW min
nA max
2.375/2.625 2.375/2.625 2.375/2.625 V min/V max
1.6
1.6
1.6
kW min
10
10
10
pF max
2.5
2.5
2.5
V nom
± 10
± 10
± 10
mV max
± 20
± 20
± 20
mV max
25
25
25
ppm/∞C typ
5
5
5
kW nom
LOGIC INPUTS
Input High Voltage, VINH
Input Low Voltage, VINL
Input Current, IINH
Input Capacitance5 CIN
2.4
2.4
2.4
V min
0.8
0.8
0.8
V max
± 10
± 10
± 10
mA max
10
10
10
pF max
Test Conditions/Comments
Sample Rate = 454.5 kSPS3 (AD7891-1),
500 kSPS3 (AD7891-2). Any channel.
fa = 9 kHz, fb = 9.5 kHz.
Any channel.
1.5 LSB max.
Input ranges of 0 V to 2.5 V, 0 V to 5 V.
1 LSB max.
Input ranges of ± 2.5 V, ± 5 V, ± 10 V.
1.5 LSB max.
Input ranges of ± 2.5 V, ± 5 V, ± 10 V.
1.5 LSB max.
Input applied to both VINXA and VINXB.
Input applied to VINXA, VINXB = AGND.
Input range of ± 5 V.
Input range of ± 10 V.
Input applied to both VINXA and VINXB.
Input applied to VINXA, VINXB = AGND.
Input applied to VINXA, VINXB = REF IN6.
Input ranges of ± 2.5 V and 0 V to 5 V.
Input range of 0 V to 2.5 V.
2.5 V ± 5%.
Resistor connected to internal reference node.
See REF IN input impedance.
VDD = 5 V ± 5%.
VDD = 5 V ± 5%.
–2–
REV. D
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