LTC1402
U W
TYPICAL PERFOR A CE CHARACTERISTICS
(Bipolar Mode Plots Run with Dual ±5V Supplies.
Unipolar Mode Plots Run with a Single 5V Supply. VDD = 5V, VSS = –5V for Bipolar, VDD = 5V, VSS = 0V for Unipolar), TA = 25°C.
Differential Nonlinearity
vs Output Code (Bipolar)
Positive Power Supply Rejection
for VREF
Integral Nonlinearity
vs Output Code (Bipolar)
4.095
4.090
4.085
4.080
4.075
4.070
4.065
1.00
0.75
0.50
0.25
0
1.00
0.75
0.50
0.25
0
f
= 2.2MHz
f
= 2.2MHz
SAMPLE
SAMPLE
–0.25
–0.50
–0.75
–1.00
–0.25
–0.50
–0.75
–1.00
4.5
4.75
5.0
5.25
(V)
5.5
5.75
6.0
2048 2560
CODE
2048 2560
CODE
0
512 1024 1536
3072 3584 4096
0
512 1024 1536
3072 3584 4096
V
DD
1402 G21
1402 G15
1402 G14
Differential Nonlinearity
vs Output Code (Unipolar)
Integral Nonlinearity
vs Output Code (Unipolar)
Negative Power Supply Rejection
for VREF
4.095
4.090
1.00
0.75
0.50
0.25
0
1.00
0.75
0.50
0.25
0
f
= 2.2MHz
f
= 2.2MHz
SAMPLE
SAMPLE
4.085
4.080
–0.25
–0.50
–0.75
–1.00
–0.25
–0.50
–0.75
–1.00
4.075
4.070
4.065
–5
–4
–3
–2
(V)
–1
0
2048 2560
CODE
2048 2560
CODE
0
512 1024 1536
3072 3584 4096
0
512 1024 1536
3072 3584 4096
V
SS
1402 G19
1402 G17
1402 G16
U
U
U
PIN FUNCTIONS
AVDD (Pin 1): 5V Analog Power Supply. Bypass to AGND1 AIN– (Pin4):NegativeAnalogSignalInput.Canbegrounded
and solid analog ground plane with 10µF ceramic (or 10µF or driven differentially with AIN+. Identical to AIN+, except
tantalum in parallel with 0.1µF ceramic).
that it inverts the input signal. (Note 3)
AGND1(Pin2):AnalogGround. Tietosolidanalogground VREF (Pin 5): 4.096V Reference Voltage Output. Bypass to
plane. The analog ground plane should be solid and have AGND1 and solid analog ground plane with 10µF ceramic
no cuts near the LTC1402.
(or 10µF tantalum in parallel with 0.1µF ceramic).
AIN+ (Pin 3): Positive Analog Signal Input. 0V to 4.096V in AGND2 (Pin 6): Analog Ground Return for the Reference
unipolar mode and ±2.048V in bipolar mode when AIN– is and Internal CDAC. AGND2 could be overdriven externally
grounded. Both of these ranges operate fully differentially above ground. Tie to solid analog ground plane.
with respect to AIN–. (Note 3)
7
Linear [ Linear ]
