AD7869(RevB) Ver la hoja de datos (PDF) - Analog Devices
Número de pieza
componentes Descripción
Fabricante
AD7869 Datasheet PDF : 16 Pages
| |||
AD7869–SPECIFICATIONS
ADC SECTION (VDD = +5 V ؎ 5%, VSS = –5 V ؎ 5%, AGND = DGND = 0 V, fCLK = 2.0 MHz external.
All specifications TMIN to TMAX unless otherwise noted.)
Parameter
J Version1 A Version1 Units
Test Conditions/Comments
DYNAMIC PERFORMANCE2
Signal-to-Noise Ratio3, 4 (SNR) @ +25°C
TMIN to TMAX
Total Harmonic Distortion (THD)
Peak Harmonic or Spurious Noise
Intermodulation Distortion (IMD)
Second Order Terms
Third Order Terms
Track/Hold Acquisition Time
DC ACCURACY
Resolution
Minimum Resolution
Integral Nonlinearity
Differential Nonlinearity
Bipolar Zero Error
Positive Gain Error5
Negative Gain Error5
ANALOG INPUT
Input Voltage Range
Input Current
REFERENCE OUTPUT6
RO ADC @ +25°C
RO ADC TC
Reference Load Sensitivity
(∆RO ADC vs. ∆I)
78
78
–86
–86
–86
–88
2
14
14
±2
±1
± 20
± 20
± 20
±3
±1
2.99/3.01
± 25
–1.5
LOGIC INPUTS
(CONVST, CLK, CONTROL)
Input High Voltage, VINH
2.4
Input Low Voltage, VINL
0.8
Input Current, IIN
± 10
Input Current7 (CONTROL & CLK) ± 10
Input Capacitance, CIN8
10
LOGIC OUTPUTS
DR, RFS Outputs
Output Low Voltage, VOL
0.4
RCLK Output
Output Low Voltage, VOL
0.4
DR, RFS, RCLK Outputs
Floating-State Leakage Current
± 10
Floating-State Output Capacitance8
15
78
dB min
VIN = 10 kHz Sine Wave, fSAMPLE = 83 kHz
77
dB min
–86
dB typ
VIN = 10 kHz Sine Wave, fSAMPLE = 83 kHz
–86
dB typ
VIN = 10 kHz Sine Wave, fSAMPLE = 83 kHz
–86
dB typ
fa = 9 kHz, fb = 9.5 kHz, fSAMPLE = 50 kHz
–88
dB typ
fa = 9 kHz, fb = 9.5 kHz, fSAMPLE = 50 kHz
2
µs max
14
Bits
14
Bits
No Missing Codes Are Guaranteed
±2
LSB max
±1
LSB max
± 20
LSB max
± 20
LSB max
± 20
LSB max
±3
Volts
±1
mA max
2.99/3.01
± 25
± 40
–1.5
V min/ V max
ppm/°C typ
± ppm/°C max
mV max
Reference Load Current Change (0–500 µA),
Reference Load Should Not Be Changed
During Conversion
2.4
V min
VDD = 5 V ± 5%
0.8
V max
VDD = 5 V ± 5%
± 10
µA max
VIN = 0 V to VDD
± 10
µA max
VIN = VSS to DGND
10
pF max
0.4
V max
ISINK = 1.6 mA, Pull-Up Resistor = 4.7 kΩ
0.4
V max
ISINK = 2.6 mA, Pull-Up Resistor = 2 kΩ
± 10
µA max
15
pF max
CONVERSION TIME
External Clock
Internal Clock
POWER REQUIREMENTS
VDD
VSS
IDD
ISS
Total Power Dissipation
10
10
µs max
10
10
µs max
The Internal Clock Has a Nominal Value of 2.0 MHz
For Both DAC and ADC
+5
+5
V nom
± 5% for Specified Performance
–5
–5
V nom
± 5% for Specified Performance
22
22
mA max
Cumulative Current from the Two VDD Pins
12
12
mA max
Cumulative Current from the Two VSS Pins
170
170
mW max
Typically 130 mW
NOTES
1Temperature ranges are as follows: J Version, 0°C to +70°C; A Version, –40°C to +85°C.
2VIN = ± 3 V.
3SNR calculation includes distortion and noise components.
4SNR degradation due to asynchronous DAC updating during conversion is 0.1 dB typ.
5Measured with respect to internal reference.
6For capacitive loads greater than 50 pF, a series resistor is required (see Internal Reference section).
7Tying the CONTROL input to VDD places the device in a factory test mode where normal operation is not exhibited.
8Sample tested @ +25°C to ensure compliance.
Specifications subject to change without notice.
–2–
REV. B
Share Link: 