Analog Devices AD5934, Руководство пользователя, Страница: 4 / 40

AD5934
Rev. A | Page 4 of 40
SPECIFICATIONS
VDD = 3.3 V, MCLK = 16.776 MHz, 2 V p-p output excitation voltage @ 30 kHz, 200 kΩ connected between Pin 5 and Pin 6; feedback
resistor = 200 kΩ connected between Pin 4 and Pin 5; PGA gain = ×1, unless otherwise noted.
Table 1.
Y Version
1
Parameter Min Typ Max Unit Test Conditions/Comments
SYSTEM
Impedance Range 1 k 10 M Ω 100 Ω to 1 kΩ requires extra buffer circuitry,
see Measuring Small Impedances section
Total System Accuracy 0.5 %
2 V p-p output excitation voltage at 30 kHz,
200 kΩ connected between Pin 5 and Pin 6
System Impedance Error Drift 30 ppm/°C
TRANSMIT STAGE
Output Frequency Range 2 1 100 kHz
Output Frequency Resolution 0.1 Hz <0.1 Hz resolution achievable using
direct digital synthesis (DDS) techniques
MCLK Frequency 16.776 MHz Maximum system clock frequency
TRANSMIT OUTPUT VOLTAGE
Range 1
AC Output Excitation Voltage
3
1.98 V p-p Refer to Figure 4 for output voltage distribution
DC Bias
4
1.48 V DC bias of the ac excitation signal; see Figure 5
DC Output Impedance 200 Ω T
A
= 25°C
Short-Circuit Current to Ground at VOUT ±5.8 mA T
A
= 25°C
Range 2
AC Output Excitation Voltage
3
0.97 V p-p See Figure 6
DC Bias
4
0.76 V DC bias of output excitation signal; see Figure 7
DC Output Impedance 2.4 kΩ
Short-Circuit Current to Ground at VOUT ±0.25 mA
Range 3
AC Output Excitation Voltage 3 0.383 V p-p See Figure 8
DC Bias
4
0.31 V DC bias of output excitation signal; see Figure 9
DC Output Impedance 1 kΩ
Short-Circuit Current to Ground at VOUT ±0.20 mA
Range 4
AC Output Excitation Voltage
3
0.198 V p-p See Figure 10
DC Bias
4
0.173 V DC bias of output excitation signal; see Figure 11
DC Output Impedance 600 Ω
Short-Circuit Current to Ground at VOUT ±0.15 mA
SYSTEM AC CHARACTERISTICS
Signal-to-Noise Ratio 60 dB
Total Harmonic Distortion −52 dB
Spurious-Free Dynamic Range
Wide Band (0 MHz to 1 MHz) −56 dB
Narrow Band (±5 kHz) −85 dB