LTC2641/LTC2642
ELECTRICAL CHARACTERISTICS
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
DD
= 3V or 5V, V
REF
= 2.5V, C
L
= 10pF, GND = 0, R
L
= ∞ unless
otherwise specified.
LTC2641-12
LTC2642-12
SYMBOL PARAMETER
Static Peformance
N
DNL
INL
ZSE
ZS
TC
GE
GE
TC
R
OUT
Resolution
Monotonicity
Differential Nonlinearity
Integral Nonlinearity
Zero Code Offset Error
Zero Code Tempco
Gain Error
Gain Error Tempco
DAC Output Resistance
Bipolar Resistor Matching
BZE
BZS
TC
PSR
Bipolar Zero Offset Error
Bipolar Zero Tempco
Power Supply Rejection
(Note 4)
(LTC2642) R
FB
/R
INV
Ratio Error (Note 7)
●
(LTC2642)
(LTC2642)
ΔV
DD
= ±10%
●
●
●
●
●
LTC2641-14
LTC2642-14
MAX
MIN
14
14
±0.5
±0.5
1
±0.5
±0.5
±0.05
±2
±1
±0.1
6.2
1
±0.1
±0.03
±0.5
±0.1
±0.5
±0.5
±4
±2
±4
±1
±1
2
TYP
MAX
MIN
16
16
LTC2641-16
LTC2642-16
TYP
MAX
UNITS
Bits
Bits
±0.5
±0.5
±0.05
±2
±0.1
6.2
1
±0.015
±2
±0.1
±1
±5
%
LSB
ppm/°C
LSB
±5
±1
±2
2
LSB
LSB
LSB
ppm/°C
LSB
ppm/°C
kΩ
CONDITIONS
MIN
12
12
TYP
(Note 2)
(Note 2)
Code = 0
●
●
●
±0.05
±0.5
±0.1
6.2
1
±0.5
±0.1
The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
V
DD
= 3V or 5V, V
REF
= 2.5V, C
L
= 10pF, GND = 0, R
L
= ∞ unless otherwise specified.
SYMBOL
Reference Input
V
REF
R
REF
Reference Input Range
Reference Input Resistance (Note 5)
Unipolar Mode (LTC2641)
Bipolar Mode (LTC2642)
Measured from 10% to 90%
To ±0.5LSB of FS
Major Carry Transition
Code = 0000hex; NCS = V
DD
;
SCLK, DIN 0V to V
DD
Levels
Code = FFFFhex
Code = 0000hex, V
REF
= 1V
P-P
at 100kHz
Code = 0000hex
Code = FFFFhex
V
CC
= 3.6V to 5.5V
V
CC
= 2.7V to 3.6V
V
CC
= 4.5V to 5.5V
V
CC
= 2.7V to 4.5V
●
●
●
●
●
●
●
PARAMETER
CONDITIONS
MIN
2.0
11
8.5
TYP
MAX
V
DD
UNITS
V
kΩ
kΩ
V/μs
μs
nV•s
nV•s
14.8
11.4
15
1
0.5
0.2
Dynamic Performance—V
OUT
SR
Voltage Output Slew Rate
Output Settling Time
DAC Glitch Impulse
Digital Feedthrough
Dynamic Performance—Reference Input
BW
SNR
C
IN(REF)
Digital Inputs
V
IH
V
IL
Digital Input High Voltage
Digital Input Low Voltage
2.4
2.0
0.8
0.6
V
V
V
V
26412f
Reference –3dB Bandwidth
Reference Feedthrough
Signal-to-Noise Ratio
Reference Input Capacitance
1.3
1
92
75
120
MHz
mV
P-P
dB
pF
pF
4
LINER [ LINEAR TECHNOLOGY ]
