Datasheet

7
LTC1666/LTC1667/LTC1668
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Differential Nonlinearity
DIGITAL INPUT CODE
0
DIFFERENTIAL NONLINEARITY (LSB)
0
1.0
65535
1666/7/8 G19
–1.0
–2.0
16384
32768
49152
2.0
–0.5
0.5
–1.5
1.5
(LTC1668)
UU
U
PI FU CTIO S
LTC1666
REFOUT (Pin 15): Internal Reference Voltage Output.
Nominal value is 2.5V. Requires a 0.1µF bypass capacitor
to AGND.
I
REFIN
(Pin 16): Reference Input Current. Nominal value is
1.25mA for I
FS
= 10mA. I
FS
= I
REFIN
• 8.
AGND (Pin 17): Analog Ground.
LADCOM (Pin 18): Attenuator Ladder Common. Normally
tied to GND.
I
OUT B
(Pin 19): Complementary DAC Output Current. Full-
scale output current occurs when all data bits are 0s.
I
OUT A
(Pin 20): DAC Output Current. Full-scale output
current occurs when all data bits are 1s.
COMP1 (Pin 21): Current Source Control Amplifier Com-
pensation. Bypass to V
SS
with 0.1µF.
COMP2 (Pin 22): Internal Bypass Point. Bypass to V
SS
with 0.1µF.
V
SS
(Pin 23): Negative Supply Voltage. Nominal value is
–5V.
DGND (Pin 24): Digital Ground.
V
DD
(Pin 25): Positive Supply Voltage. Nominal value is 5V.
CLK (Pin 26): Clock Input. Data is latched and the output
is updated on positive edge of clock.
DB11 to DB0 (Pins 27, 28, 1 to 10 ): Digital Input Data Bits.