AD9707-EB Analog Devices Inc, AD9707-EB Datasheet - Page 38

• Manufacturer Part Number: AD9707-EB
• Description: BOARD EVAL FOR AD9707
• Manufacturer: Analog Devices Inc
• Series: TxDAC®r

Specifications of AD9707-EB

• Number Of Dac's: 1
• Number Of Bits: 14
• Outputs And Type: 1, Differential
• Sampling Rate (per Second): 175M
• Data Interface: Serial
• Settling Time: 11ns
• Dac Type: Current
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: AD9707
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

AD9704/AD9705/AD9706/AD9707
Sleep and Power-Down Operation (Pin Mode)
The AD9704/AD9705/AD9706/AD9707 have a sleep mode
that turns off the output current and reduces the total power
consumed by the device. This mode is activated by applying
a Logic 1 to the SLEEP/CSB pin. The SLEEP/CSB pin logic
threshold is equal to 0.5 × DVDD. This digital input also
contains an active pull-down circuit.
The AD9704/AD9705/AD9706/AD9707 take less than 50 ns to
power down and approximately 5 μs to power back up.
Sleep and Power-Down Operation (SPI Mode)
The AD9704/AD9705/AD9706/AD9707 offer three power-
down functions that can be controlled through the SPI. These
power-down modes can be used to minimize the power
dissipation of the device. The power-down functions are
controlled through SPI Register 0x00, Bit 1 to Bit 3. Table 26
summarizes the power-down functions that can be controlled
through the SPI. The power-down mode can be enabled by
writing a Logic 1 to the corresponding bit in Register 0x00.
Table 26. Power-Down Mode Selection
Power-Down
Mode
Clock Off
Sleep
Power Down
(Reg. 0x00)
Bit Number
1
2
3
Functional Description
Turn off clock
Turn off output current
Turn off output current and
internal band gap reference
Rev. A | Page 38 of 52
SELF-CALIBRATION
The AD9704/AD9705/AD9706/AD9707 have a self-calibration
feature that improves the DNL of the device. Performing a self-
calibration on the device improves device performance in low
frequency applications. The device performance in applications
where the analog output frequencies are above 1 MHz are
generally influenced more by dynamic device behavior than by
DNL, and in these cases, self-calibration is unlikely to provide
any benefits for single-tones, as shown in Figure 87. Figure 88
shows that self-calibration is helpful up to 20 MHz for two-tone
IMD spaced 10 kHz apart.
Figure 87. AD9707 SFDR vs. f
Figure 88. IMD vs. Lower f
88
86
84
82
80
78
88
87
86
85
84
83
82
81
80
79
78
0
0
UNCALIBRATED
UNCALIBRATED
0.2
5
CALIBRATED
CALIBRATED
LOWER
OUT
f
OUT
OUT
@ 175 MSPS and I
@ 175 MSPS and I
0.4
10
f
(MHz)
OUT
(MHz)
0.6
15
OUTFS
OUTFS
= 2 mA
= 2 mA
0.8
20