LTC2757 Linear Technology, LTC2757 Datasheet - Page 7

• Manufacturer Part Number: LTC2757
• Description: 18-Bit SoftSpan IOUT DAC
• Manufacturer: Linear Technology

TYPICAL PERFORMANCE CHARACTERISTICS
V
(AVERAGED)
WAVEFORM
DD
100μV/DIV
SETTLING
–0.2
–0.4
–0.6
–0.8
–1.0
5V/DIV
GATED
= 5V, V(R
1.0
0.8
0.6
0.4
0.2
0
UPD
2.5
12
10
INL vs V
8
6
4
2
0
±10V RANGE
Settling Full-Scale Step
Supply Current
vs Logic Input Voltage
LT1468 AMP; C
0V TO 10V STEP
V
t
0
SETTLE
REF
3
IN
= –10V; SPAN CODE = 000
) = 5V, T
DD
= 1.8μs to 0.0004% (18 BITS)
1
3.5
LOGIC VOLTAGE (V)
V
V(R
FEEDBACK
DD
A
500ns/DIV
2
IN
4
= 3V
= 25°C, unless otherwise noted.
) (V)
V
+INL
–INL
DD
= 20pF
= 5V
4.5
3
ALL DIGITAL PINS
TIED TOGETHER
(EXCEPT READ
TIED TO GND)
5
4
2757 G10
2757 G16
2757 G13
5.5
5
10mV/DIV
–0.2
–0.4
–0.6
–0.8
–1.0
5V/DIV
1.0
0.8
0.6
0.4
0.2
V
1.75
1.25
0.75
UPD
0
OUT
0.5
1.5
2.5
2
1
DNL vs V
2.5
±10V RANGE
Mid-Scale Glitch (V
Logic Threshold
vs Supply Voltage
0V TO 5V RANGE
LT1468 OUTPUT AMPLIFIER
C
RISING MAJOR CARRY TRANSITION.
FALLING TRANSITION IS SIMILAR OR BETTER.
1.4nV•s TYP
FEEDBACK
3
3
DD
= 50pF
3.5
3.5
V(R
RISING
FALLING
500ns/DIV
V
IN
4
DD
) (V)
+DNL
–DNL
4
(V)
DD
4.5
4.5
= 3V)
5
2757 G11
5
2757 G17
2757 G14
5.5
5.5
10mV/DIV
5V/DIV
–100
–120
–140
1000
–20
–40
–60
–80
V
UPD
100
OUT
0.1
0
10
100
1
10
Multiplying Frequency Response
vs Digital Code
ALL BITS ON
D17
D16
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
ALL BITS OFF
Supply Current
vs Update Frequency
Mid-Scale Glitch (V
0V TO 5V RANGE
LT1468 OUTPUT AMPLIFIER
C
RISING MAJOR CARRY TRANSITION.
FALLING TRANSITION IS SIMILAR OR BETTER.
3nV•s TYP
ALTERNATING ZERO-SCALE/FULL-SCALE
FEEDBACK
V
V
1k
100
DD
DD
= 50pF
= 5V
= 3V
UPD FREQUENCY (Hz)
FREQUENCY (Hz)
10k
0V TO 5V OUTPUT RANGE
LT1468 OUTPUT AMPLIFIER
C
www.DataSheet4U.com
1k
FEEDBACK
500ns/DIV
LTC2757
100k
10k
DD
= 15pF
= 5V)
1M
100k
2757 G12
2757 G15
2757 G18
7
2757f
10M
1M