AD9146 Analog Devices, AD9146 Datasheet - Page 26

• Manufacturer Part Number: AD9146
• Description: Dual, 16-Bit, 1230 MSPS, TxDAC+® Digital-to-Analog Converter
• Manufacturer: Analog Devices

Specifications of AD9146

• Resolution (bits): 16bit
• Dac Update Rate: 1.23GSPS
• Dac Settling Time: n/a
• Max Pos Supply (v): +3.47V
• Single-supply: No
• Dac Type: Current Out
• Dac Input Format: Byte,LVDS,Nibble

AD9146
Register
Name
Q DAC
Control
Q Aux DAC
Data
Q Aux DAC
Control
Die Temp
Range
Control
Die Temp
LSB
Die Temp
MSB
SED Control
Address
(Hex)
0x45
0x46
0x47
0x48
0x49
0x4A
0x67
Bits
7
[1:0]
[7:0]
7
6
5
[1:0]
[6:4]
[3:1]
0
[7:0]
[7:0]
7
5
3
1
0
Name
Q DAC sleep
Q DAC FS Adj[9:8]
Q Aux DAC[7:0]
Q aux DAC sign
Q aux DAC current
direction
Q aux DAC sleep
Q Aux DAC[9:8]
FS Current[2:0]
Reference Current[2:0]
Capacitor value
Die Temp[7:0]
Die Temp[15:8]
SED compare enable
Sample error detected
Autoclear enable
Compare fail
Compare pass
Rev. A | Page 26 of 56
Description
1 = puts the Q DAC into sleep mode (fast wake-up mode).
Q DAC FS Adj[9:0] sets the full-scale current of the Q DAC.
The full-scale current can be adjusted from 8.64 mA to
31.68 mA in step sizes of approximately 22.5 µA.
0x000 = 8.64 mA.
…
0x200 = 20.16 mA.
…
0x3FF = 31.68 mA.
See Register 0x47, Bits[1:0].
0 = the Q auxiliary DAC sign is positive, and the current is
directed to the IOUT2P pin (Pin 38).
1 = the Q auxiliary DAC sign is negative, and the current is
directed to the IOUT2N pin (Pin 39).
0 = the Q auxiliary DAC sources current.
1 = the Q auxiliary DAC sinks current.
1 = puts the Q auxiliary DAC into sleep mode.
Q Aux DAC[9:0] sets the magnitude of the auxiliary DAC
current. The range is 0 mA to 2 mA, and the step size is 2 µA.
0x000 = 0.000 mA.
0x001 = 0.002 mA.
…
0x3FF = 2.046 mA.
Auxiliary ADC full-scale current.
000 = lowest current.
…
111 = highest current.
Auxiliary ADC reference current.
000 = lowest current.
…
111 = highest current.
Auxiliary ADC internal capacitor value.
0 = 5 pF.
1 = 10 pF.
See Register 0x4A.
Die Temp[15:0] indicates the approximate die temperature.
For more information, see the Temperature Sensor section.
1 = enable the SED circuitry. None of the flags in this
register or the values in Register 0x70 through
Register 0x73 are significant if the SED is not enabled.
1 = indicates an error was detected. The bit remains set until
cleared. Any write to this register clears this bit to 0.
1 = enable autoclear mode. This activates Bit 1 and Bit 0 of
this register and causes Register 0x70 through Register 0x73
to be autocleared when eight consecutive sample data sets
are received error free.
1 = indicates an error was detected. This bit remains set until
it is autocleared by the reception of eight consecutive error-
free comparisons or is cleared by a write to this register.
1 = indicates that the last sample comparison was error free.
Data Sheet
Default
0
01
00000000
0
0
0
00
000
001
0
N/A
N/A
0
0
0
0
0