LTC2704IGW-16 Linear Technology, LTC2704IGW-16 Datasheet - Page 15

• Manufacturer Part Number: LTC2704IGW-16
• Description: IC,D/A CONVERTER,QUAD,16-BIT,CMOS,SOP,44PIN
• Manufacturer: Linear Technology

OPERATIO
Examples
1. Using a 24-bit loading sequence, load DAC A with the
unipolar range of 0V to 10V, output at zero volts and all
other DACs with the bipolar range of ±10V, outputs at
zero volts. Note all DAC outputs should change at the
same time.
a) CS/LD↓
b) Clock SDI = 0010 1111 0000 0000 0000 0011
c) CS/LD↑
d) CS/LD↓
e) CS/LD↑
f) CS/LD↓
g) CS/LD↑
h) CS/LD↓
i) CS/LD↑
j) CS/LD↓
k) CS/LD↑
l) Alternatively steps j and k could be replaced with
B1-Range of all DACs set to bipolar ±10V.
Clock SDI = 0010 0000 0000 0000 0000 0001
B1-Range of DAC A set to unipolar 0V to 10V.
Clock SDI = 0011 1111 1000 0000 0000 0000
B1-Code of all DACs set to midscale.
Clock SDI = 0011 0000 0000 0000 0000 0000
B1-Code of DAC A set to zero code.
Clock SDI = 0100 1111 XXXX XXXX XXXX XXXX
Update all DACs B1s into B2s for both Code and
Range.
LDAC
.
U
2. Using a 32-bit load sequence, load DAC C with bipolar
±2.5V and its output at zero volts. Use readback to
check B1 contents before updating the DAC output (i.e.,
before copying B1 contents into B2).
a) CS/LD↓ (Note that after power-on, the Code in B1 is
b) Clock SDI = 0000 0000 0011 0100 1000 0000 0000
c) CS/LD↑
d) CS/LD↓
e) Read Data out on SRO = 1000 0000 0000 0000
f) CS/LD↑
g) CS/LD↓
h) CS/LD↓
i) CS/LD↑
j) Alternatively steps h and i could be replaced with
zero)
0000
B1-Code of DAC C set to midscale setting.
Clock SDI = 0000 0000 0010 0100 0000 0000 0000
0100
Verifies that B1-Code DAC C is at midscale setting.
B1-Range of DAC C set to Bipolar ±2.5V range.
Clock SDI = 0000 0000 1010 0100 xxxx xxxx xxxx
xxxx
Data Out on SRO = 0000 0000 0000 0100
Verifies that B1-Range of DAC C set to Bipolar ±2.5V
Range.
CS/LD↑
Clock SDI = 0000 0000 0100 0100 xxxx xxxx xxxx
xxxx
Update DAC C B1 into B2 for both Code and Range
LDAC
.
LTC2704
15
2704f