
AD9879
Rev. A | Page 4 of 32
SPECIFICATIONS
VAS = 3.3 V ± 5%, VDS = 3.3 V ± 10%, fOSCIN = 27 MHz, fSYSCLK = 216 MHz, fMCLK = 54 MHz (M = 8), ADC clock from OSCIN,
RSET = 4.02 k, 75 DAC load, unless otherwise noted.
Table 1.
Parameter
Temp
Test Level
Min
Typ
Max
Unit
OSCIN AND XTAL CHARACTERISTICS
Frequency Range
Full
II
3
29
MHz
Duty Cycle
Full
II
35
50
65
%
Input Impedance
25°C
III
100||3
M||pF
MCLK Cycle to Cycle Jitter
25°C
III
6
ps rms
Tx DAC CHARACTERISTICS
Resolution
N/A
12
Bits
Maximum Sample Rate
Full
II
232
MHz
Full-Scale Output Current
Full
II
4
10
20
mA
Gain Error (Using Internal Reference)
25°C
I
2.0
1.0
+2.0
% FS
Offset Error
25°C
I
±1.0
% FS
Reference Voltage (REFIO Level)
25°C
I
1.18
1.23
1.28
V
Differential Nonlinearity (DNL)
25°C
III
±2.5
LSB
Integral Nonlinearity (INL)
25°C
III
±8
LSB
Output Capacitance
25°C
III
5
pF
Phase Noise @ 1 kHz Offset, 42 MHz
Crystal and OSCIN Multiplier Enabled at 16×
25°C
III
110
dBc/Hz
Output Voltage Compliance Range
Full
II
0.5
+1.5
V
Wideband SFDR
5 MHz Analog Out, IOUT = 10 mA
Full
III
60.8
66.9
dBc
65 MHz Analog Out, IOUT = 10 mA
Full
III
44.0
46.2
dBc
Narrow-band SFDR (±1 MHz Window)
5 MHz Analog Out, IOUT = 10 mA
Full
III
65.4
72.3
dBc
Tx MODULATOR CHARACTERISTICS
I/Q Offset
Full
II
50
55
dB
Pass-Band Amplitude Ripple (f < fIQCLK/8)
Full
II
±0.1
dB
Pass-Band Amplitude Ripple (f < fIQCLK/4)
Full
II
±0.5
dB
Stop-Band Response (f > fIQCLK × 3/4)
Full
II
63
dB
Tx GAIN CONTROL
Gain Step Size
25°C
III
0.5
dB
Gain Step Error
25°C
III
<0.05
dB
Settling Time to 1% (Full-Scale Step)
25°C
III
1.8
s
IQ ADC CHARACTERISTICS
N/A
6
Bits
Maximum Conversion Rate
Full
II
14.5
MHz
Pipeline Delay
N/A
3.5
ADC cycles
Offset Matching Between I and Q ADCs
Full
III
±4.0
LSBs
Gain Matching Between I and Q ADCs
Full
III
±2.0
LSBs
Analog Input
Full
III
1
Vppd
Input Capacitance
25°C
III
2.0
pF
Differential Input Resistance
25°C
III
4
k
AC Performance (AIN = 0.5 dBFS, fIN = 5 MHz)
Effective Number of Bits (ENOB)
25°C
I
5.00
5.8
Bits
Signal-to-Noise Ratio (SNR)
25°C
I
34.7
36.5
dB
Total Harmonic Distortion (THD)
25°C
I
50
36.2
dB
Spurious-Free Dynamic Range (SFDR)
25°C
I
41.3
51
dB