DAC1405D750_11 PHILIPS [NXP Semiconductors], DAC1405D750_11 Datasheet - Page 28

• Manufacturer Part Number: DAC1405D750_11
• Description: Dual 14-bit DAC, up to 750 Msps; 4x and 8x interpolating
• Manufacturer: PHILIPS [NXP Semiconductors]

NXP Semiconductors
DAC1405D750
Product data sheet
10.10.1 Regulation
10.10 Full-scale current
10.9 DAC transfer function
The full-scale output current for each DAC is the sum of the two complementary current
outputs:
The output current depends on the digital input data:
The setting applied to CODING (register 00h[2]; see
defines whether the DAC1405D750 operates with a binary input or a two’s complement
input.
Table 38
Table 38.
The DAC1405D750 reference circuitry integrates an internal bandgap reference voltage
which delivers a 1.25 V reference to the GAPOUT pin. It is recommended to decouple pin
GAPOUT using a 100 nF capacitor.
The reference current is generated via an external resistor of 910  (1 %) connected to
pin VIRES. A control amplifier sets the appropriate full-scale output current (I
DACs (see
Data
0
...
8192
...
16383
I
I
I
IOUTP
IOUTN
O fs
 
=
=
=
I
shows the output current as a function of the input data, when I
I13 to I0 and Q13 to Q0
Binary
00 0000 0000 0000
...
10 0000 0000 0000
...
11 1111 1111 1111
IOUTP
I
I
DAC transfer function
O fs
O fs
Figure
 
 
All information provided in this document is subject to legal disclaimers.

+



I


IOUTN
DATA
--------------- -
11).
16383
16383 DATA
------------------------------------ -
16383
Rev. 4 — 7 June 2011


–
Dual 14-bit DAC, up to 750 Msps; 4 and 8 interpolating
Two’s complement
10 0000 0000 0000
...
00 0000 0000 0000
...
01 1111 1111 1111


Table 9 “Register allocation
DAC1405D750
IOUTP (mA)
0
...
10
...
20
© NXP B.V. 2011. All rights reserved.
O(fs)
IOUTN (mA)
20
...
10
...
0
O(fs)
= 20 mA.
) for both
map”)
28 of 42
(3)
(4)
(5)