AD9959
SPECIFICATIONS
AVDD and DVDD = 1.8 V 5ꢀ% DVDD_I/O = 3.3 V 5ꢀ% T = 25°C% RSET = 1.91 kΩ% external reference clock frequency = 500 MSPS
(REFCLK multiplier bypassed), unless otherwise noted.
Table 1.
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
REFERENCE CLOCK INPUT CHARACTERISTICS
Frequency Range
See Figure 34 and Figure 35
REFCLK Multiplier Bypassed
REFCLK Multiplier Enabled
Internal VCO Output Frequency Range
VCO Gain Control Bit Set High1
VCO Gain Control Bit Set Low1
Crystal REFCLK Source Range
Input Level
Input Voltage Bias Level
Input Capacitance
Input Impedance
1
10
500
125
MHz
MHz
255
100
20
500
160
30
MHz
MHz
MHz
mV
V
200
1000
Measured at each pin (single-ended)
1.15
2
1500
pF
Ω
Duty Cycle with REFCLK Multiplier Bypassed
Duty Cycle with REFCLK Multiplier Enabled
CLK Mode Select (Pin 24) Logic 1 Voltage
CLK Mode Select (Pin 24) Logic 0 Voltage
DAC OUTPUT CHARACTERISTICS
Resolution
45
35
1.25
55
65
1.8
0.5
%
%
V
V
1.8 V digital input logic
1.8 V digital input logic
Must be referenced to AVDD
10
10
+10
+2.5
25
Bits
mA
%FS
%
μA
LSB
LSB
pF
Full-Scale Output Current
Gain Error
1.25
−10
Channel-to-Channel Output Amplitude Matching Error −2.5
Output Current Offset
Differential Nonlinearity
Integral Nonlinearity
Output Capacitance
1
0.5
1.0
3
Voltage Compliance Range
Channel-to-Channel Isolation
AVDD − 0.50
65
AVDD + 0.50
V
dB
DAC supplies tied together
(see Figure 19)
WIDEBAND SFDR
The frequency range for wideband
SFDR is defined as dc to Nyquist
1 MHz to 20 MHz Analog Output
20 MHz to 60 MHz Analog Output
60 MHz to 100 MHz Analog Output
100 MHz to 150 MHz Analog Output
150 MHz to 200 MHz Analog Output
NARROW-BAND SFDR
dBc
dBc
dBc
dBc
dBc
−65
−62
−59
−56
−53
1.1 MHz Analog Output ( 10 kHz)
1.1 MHz Analog Output ( 50 kHz)
1.1 MHz Analog Output ( 250 kHz)
1.1 MHz Analog Output ( 1 MHz)
15.1 MHz Analog Output ( 10 kHz)
15.1 MHz Analog Output ( 50 kHz)
15.1 MHz Analog Output ( 250 kHz)
15.1 MHz Analog Output ( 1 MHz)
40.1 MHz Analog Output ( 10 kHz)
40.1 MHz Analog Output ( 50 kHz)
40.1 MHz Analog Output ( 250 kHz)
40.1 MHz Analog Output ( 1 MHz)
75.1 MHz Analog Output ( 10 kHz)
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
−90
−88
−86
−85
−90
−87
−85
−83
−90
−87
−84
−82
−87
Rev. B | Page 4 of 44
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