AD7872BR Просмотр технического описания (PDF) - Analog Devices
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AD7872BR Datasheet PDF : 16 Pages
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(VDD = +5 V ؎ 5%, VSS = –5 V ؎ 5%, AGND = DGND =
AD7871/AD7872–SPECIFICATIONS O V, fCLK = 2 MHz external, fSAMPLE = 83 kHz unless otherwise
noted.) All Specifications TMIN to TMAX unless otherwise noted.
Parameter
J, A
K
T, B
Versions1 Version1 Versions1 Units
Test Conditions/Comments
DYNAMIC PERFORMANCE2
Signal-to-Noise Ratio3 (SNR) @ +25°C 80
TMIN to TMAX
80
Total Harmonic Distortion (THD)
–86
Peak Harmonic or Spurious Noise
–86
Intermodulation Distortion (IMD)
Second Order Terms
–86
Third Order Terms
–86
Track/Hold Acquisition Time
2
80
79
80
79
–88
–85
–88
–85
–88
–85
–88
–85
2
2
dB min
dB min
dB max
dB typ
dB max
dB typ
dB max
dB typ
dB max
dB typ
µs max
VIN = 10 kHz Sine Wave
SNR is Typically 82 dB for <VIN<41.5 kHz;
VIN = 10 kHz Sine Wave
VIN = 10 kHz.
fa = 9 kHz, fb = 9.5 kHz, fSAMPLE = 50 kHz
fa = 9 kHz, fb = 9.5 kHz, fSAMPLE = 50 kHz
DC ACCURACY
Resolution
14
Minimum Resolution for Which
No Missing Codes Are Guaranteed 14
Integral Nonlinearity @ +25°C
Integral Nonlinearity
Bipolar Zero Error
± 12
Positive Gain Error4
± 12
Negative Gain Error4
± 12
14
14
14
14
± 1/2
± 1/2
±1
±1
± 12
± 12
± 12
± 12
± 12
± 12
Bits
Bits
LSB typ
LSB max
LSB max
LSB max
LSB max
ANALOG INPUT
Input Voltage Range
Input Current
±3
± 500
±3
± 500
±3
± 500
Volts
µA max
REFERENCE OUTPUT
REF OUT @ +25°C
TMIN to TMAX
REF OUT Tempco
Reference Load Sensitivity
(∆REF OUT/∆I)
2.99/3.01
2.98/3.02
2.99/3.01 2.99/3.01
2.98/3.02 2.98/3.02
± 40
± 40
V min/V max
V min/V max
ppm/°C max
Typically 35 ppm
± 1.2
± 1.2
± 1.2
mV max
Reference Load Current Change (0 µA–300 µA);
Reference Load Should Not Be Changed During
Conversion
LOGIC INPUTS
Input High Voltage, VINH
2.4
Input Low Voltage, VINL
0.8
Input Current, IIN
± 10
Input Current (14/8/CLK Input Only) ± 10
Input Capacitance, CIN5
10
LOGIC OUTPUTS
Output High Voltage, VOH
4.0
Output Low Voltage, VOL
0.4
DB13 – DB0
Floating-State Leakage Current
10
Floating-State Output Capacitance5 15
2.4
2.4
0.8
0.8
± 10
± 10
± 10
± 10
10
10
4.0
4.0
0.4
0.4
10
10
15
15
V min
V max
µA max
µA max
pF max
V min
V max
µA max
pF max
VDD = 5 V ± 5%
VDD = 5 V ± 5%
VIN = 0 V to VDD
VIN = VSS to VDD
ISOURCE = 40 µA
ISINK = 1.6 mA
CONVERSION TIME
External Clock
Internal Clock
10
10
10
10.5
10.5
11
µs max
µs max
The Internal Clock Has a Nominal Value of 2 MHz
POWER REQUIREMENTS
VDD
VSS
IDD
ISS
Power Dissipation
+5
+5
+5
V nom
± 5% for Specified Performance
–5
–5
–5
V nom
± 5% for Specified Performance
13
13
13
mA max
Typically 6 mA
6
6
6
mA max
Typically 4 mA
95
95
95
mW max
Typically 50 mW
NOTES
1Temperature ranges are as follows: J, K versions, 0°C to +70°C; A, B versions, –40°C to +85°C; T version; –55°C to +125°C.
2VIN = ± 3 V.
3SNR calculation includes distortion and noise components.
4Measured with respect to internal reference.
5Sample tested @ +25°C to ensure compliance.
Specifications subject to change without notice.
–2–
REV. D
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