AD9777-EB Analog Devices Inc, AD9777-EB Datasheet - Page 18

• Manufacturer Part Number: AD9777-EB
• Description: BOARD EVAL FOR AD9777
• Manufacturer: Analog Devices Inc
• Series: TxDAC+®r

Specifications of AD9777-EB

• Rohs Status: RoHS non-compliant
• Number Of Dac's: 2
• Number Of Bits: 16
• Outputs And Type: 2, Differential
• Sampling Rate (per Second): 160M
• Data Interface: Parallel
• Settling Time: 11ns
• Dac Type: Current
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: AD9777

AD9777
MODE CONTROL (VIA SPI PORT)
Table 9. Mode Control via SPI Port
Address
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
Bit 7
SDIO
Bidirectional
0 = Input
1 = I/O
Filter
Interpolation
Rate
(1×, 2×,
4×, 8×)
0 = Signed
Input Data
1 =
Unsigned
Data Rate
Clock
Output
0 = PLL
OFF
1 = PLL ON
IDAC
Fine Gain
Adjustment
IDAC Offset
Adjustment
Bit 9
IDAC I
Direction
0 = I
I
1 = I
I
QDAC
Fine Gain
Adjustment
OUT
OUTA
B
2
OFFSET
OFFSET
OFFSET
on
2
on
Bit 6
LSB, MSB First
0 = MSB
1 = LSB
Filter
Interpolation
Rate
(1×, 2×,
4×, 8×)
0 = Two-Port
Mode
1 = One-Port
Mode
0 = Automatic
Charge Pump
Control
1 =
Programmable
IDAC
Fine Gain
Adjustment
IDAC Offset
Adjustment
Bit 8
QDAC
Fine Gain
Adjustment
1
Bit 5
Software
Reset on
Logic 1
Modulation
Mode
(None, f
f
DATACLK
Driver
Strength
IDAC
Fine Gain
Adjustment
IDAC Offset
Adjustment
Bit 7
QDAC
Fine Gain
Adjustment
S
/4, f
S
/8)
S
/2,
Bit 4
Sleep Mode
Logic 1
Shuts Down
the DAC
Output
Currents
Modulation
Mode
(None, f
f
DATACLK
Invert
0 = No
Invert
1 = Invert
IDAC
Fine Gain
Adjustment
IDAC Offset
Adjustment
Bit 6
QDAC
Fine Gain
Adjustment
Rev. C | Page 18 of 60
S
/4, f
S
/8)
S
/2,
Bit 3
Power-Down
Mode Logic 1
Shuts Down All
Digital and
Analog
Functions
0 = No Zero
Stuffing on
Interpolation
Filters, Logic 1
Enables Zero
Stuffing
IDAC
Fine Gain
Adjustment
IDAC
Coarse Gain
Adjustment
IDAC Offset
Adjustment
Bit 5
QDAC
Fine Gain
Adjustment
Bit 2
1R/2R Mode
DAC Output
Current Set by
One or Two
External
Resistors
0 = 2R, 1 = 1R
1 = Real Mix
Mode
0 = Complex
Mix Mode
ONEPORTCLK
Invert
0 = No Invert
1 = Invert
PLL
Charge
Pump
Control
IDAC
Fine Gain
Adjustment
IDAC
Coarse Gain
Adjustment
IDAC Offset
Adjustment
Bit 4
QDAC
Fine Gain
Adjustment
Bit 1
PLL_LOCK
Indicator
0 = e
1 = e
IQSEL
Invert
0 = No
Invert
1 = Invert
PLL Divide
(Prescaler)
Ratio
PLL
Charge
Pump
Control
IDAC
Fine Gain
Adjustment
IDAC
Coarse Gain
Adjustment
IDAC Offset
Adjustment
Bit 3
IDAC Offset
Adjustment
Bit 1
QDAC
Fine Gain
Adjustment
−jωt
+jωt
Bit 0
DATACLK/
PLL_LOCK
Select
0 =
PLL_LOCK
1 =
DATACLK
Q First
0 = I First
1 = Q First
PLL Divide
(Prescaler)
Ratio
PLL
Charge
Pump
Control
IDAC
Fine Gain
Adjustment
IDAC
Coarse Gain
Adjustment
IDAC Offset
Adjustment
Bit 2
IDAC Offset
Adjustment
Bit 0
QDAC
Fine Gain
Adjustment
2