Features: 400 MSPS internal clock speed
Integrated 14-bit DAC
32-bit tuning word
Phase noise 120 dBc/Hz @ 1 kHz offset (DAC output)
Excellent dynamic performance >80 dB SFDR @ 160 MHz (±100 kHz offset) AOUT
Serial I/O control
1.8 V power supply
Software and hardware controlled power-down
48-lead TQFP/EP package
Support for 5 V input levels on most digital inputs
PLL REFCLK multiplier (4* to 20*)
Internal oscillator, can be driven by a single crystal
Phase modulation capability
Multichip synchronization
ApplicationAgile LO frequency synthesis
Programmable clock generators
Test and measurement equipment
Acousto-optic device drivers
Pinout
Specifications
| Compliance Range (V) |
2.05V |
| FS Iout (mA nom) |
10mA |
| I Supply total (max) |
n/a |
| I/O Interface |
Serial |
| Master fclk |
400MHz |
| Nominal Supply (V) |
Multi(+1.8, +3.3),Single(+1.8) |
| On-Board Comparator |
No |
| REFCLK Multiplier |
Yes |
| Resolution (Bits) |
14bit |
| Parameter |
Rating |
Maximum Junction Temperature
DVDD_I/O (Pin 43)
AVDD, DVDD
Digital Input Voltage (DVDD_I/O = 3.3 V)
Digital Input Voltage (DVDD_I/O = 1.8 V)
Digital Output Current
Storage Temperature
Operating Temperature
Lead Temperature (10 sec Soldering)
JA
JC |
150°C
4 V
2 V
0.7 V to +5.25 V
0.7 V to +2.2 V
5 mA
65°C to +150°C
40°C to +105°C
300°C
38°C/W
15°C/W |
DescriptionThe AD9951 is a direct digital synthesizer (DDS) featuring a 14-bit DAC operating up to 400 MSPS. The AD9951 uses advanced DDS technology, coupled with an internal high speed, high performance DAC to form a digitally programmable, complete high frequency synthesizer capable of generating a frequency-agile analog output sinusoidal waveform at up to 200 MHz. The AD9951 is designed to provide fast frequency hopping and fine tuning resolution (32-bit frequency tuning word). The frequency tuning and control words are loaded into the AD9951 via a serial I/O port.
The AD9951 is specified to operate over the extended industrial temperature range of 40°C to +105°C.
AD9951 Data Sheet
