Datasheet

LTC2641/LTC2642
4
26412fc
For more information www.linear.com/LTC2641
elecTrical characTerisTics
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Reference Input
V
REF
Reference Input Range
l
2.0 V
DD
V
R
REF
Reference Input Resistance (Note 5) Unipolar Mode (LTC2641)
Bipolar Mode (LTC2642)
l
l
11
8.5
14.8
11.4
kΩ
k
Ω
Dynamic Performance—V
OUT
SR Voltage Output Slew Rate Measured from 10% to 90% 15 V/µs
Output Settling Time To ±0.5LSB of FS 1 µs
DAC Glitch Impulse Major Carry Transition 0.5 nV•s
Digital Feedthrough Code = 0000hex; NCS = V
DD
;
SCLK, DIN 0V to V
DD
Levels
0.2 nV•s
Dynamic Performance—Reference Input
BW Reference –3dB Bandwidth Code = FFFFhex 1.3 MHz
Reference Feedthrough Code = 0000hex, V
REF
= 1V
P-P
at 100kHz 1 mV
P-P
SNR Signal-to-Noise Ratio 92 dB
C
IN(REF)
Reference Input Capacitance Code = 0000hex
Code = FFFFhex
75
120
pF
pF
Digital Inputs
V
IH
Digital Input High Voltage V
CC
= 3.6V to 5.5V
V
CC
= 2.7V to 3.6V
l
l
2.4
2.0
V
V
V
IL
Digital Input Low Voltage V
CC
= 4.5V to 5.5V
V
CC
= 2.7V to 4.5V
l
l
0.8
0.6
V
V
The l 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 PARAMETER CONDITIONS
LTC2641-12
LTC2642-12
LTC2641-14
L
TC2642-14
LTC2641-16
LTC2642-16
LTC2641A-16
LTC2642A-16
UNITSMIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX
Static Peformance
N Resolution
l
12 14 16 16 Bits
Monotonicity
l
12 14 16 16 Bits
DNL Differential Nonlinearity (Note 3)
l
±0.5 ±0.5 ±1 ±0.5 ±1 ±0.5 ±1 LSB
INL Integral Nonlinearity (Note 3)
l
±0.5 ±0.5 ±1 ±0.5 ±2 ±0.5 ±1 LSB
ZSE Zero Code Offset Error Code = 0
l
1 2 2 2 LSB
ZS
TC
Zero Code Tempco ±0.05 ±0.05 ±0.05 ±0.05 ppm/°C
GE Gain Error
l
±0.5 ±2 ±1 ±4 ±2 ±5 ±2 ±5 LSB
GE
TC
Gain Error Tempco ±0.1 ±0.1 ±0.1 ±0.1 ppm/°C
R
OUT
DAC Output Resistance (Note 4) 6.2 6.2 6.2 6.2
kΩ
Bipolar Resistor Matching (LTC2642) R
FB
/R
INV
1 1 1 1
Ratio Error (Note 7)
l
±0.1 ±0.03 ±0.015 ±0.015 %
BZE Bipolar Zero Offset Error (LTC2642)
l
±0.5 ±2 ±0.5 ±4 ±2 ±5 ±2 ±5 LSB
BZS
TC
Bipolar Zero Tempco (LTC2642) ±0.1 ±0.1 ±0.1 ±0.1 ppm/°C
PSR Power Supply Rejection
ΔV
DD
= ±10%
l
±0.5 ±0.5 ±1 ±1 LSB
The l 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.