
LTC2641/LTC2642
4
26412fc
For more information www.linear.com/LTC2641
elecTrical characTerisTics
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Reference Input
VREF
Reference Input Range
l
2.0
VDD
V
RREF
Reference Input Resistance (Note 5)
Unipolar Mode (LTC2641)
Bipolar Mode (LTC2642)
l
11
8.5
14.8
11.4
k
Ω
k
Ω
Dynamic Performance—VOUT
SR
Voltage Output Slew Rate
Measured from 10% to 90%
15
V/s
Output Settling Time
To ±0.5LSB of FS
1
s
DAC Glitch Impulse
Major Carry Transition
0.5
nVs
Digital Feedthrough
Code = 0000hex; NCS = VDD;
SCLK, DIN 0V to VDD Levels
0.2
nVs
Dynamic Performance—Reference Input
BW
Reference –3dB Bandwidth
Code = FFFFhex
1.3
MHz
Reference Feedthrough
Code = 0000hex, VREF = 1VP-P at 100kHz
1
mVP-P
SNR
Signal-to-Noise Ratio
92
dB
CIN(REF)
Reference Input Capacitance
Code = 0000hex
Code = FFFFhex
75
120
pF
Digital Inputs
VIH
Digital Input High Voltage
VCC = 3.6V to 5.5V
VCC = 2.7V to 3.6V
l
2.4
2.0
V
VIL
Digital Input Low Voltage
VCC = 4.5V to 5.5V
VCC = 2.7V to 4.5V
l
0.8
0.6
V
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VDD = 3V or 5V, VREF = 2.5V, CL = 10pF, GND = 0, RL = ∞unless otherwise
specified.
SYMBOL PARAMETER
CONDITIONS
LTC2641-12
LTC2642-12
LTC2641-14
LTC2642-14
LTC2641-16
LTC2642-16
LTC2641A-16
LTC2642A-16
UNITS
MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX
Static Peformance
N
Resolution
l
12
14
16
Bits
Monotonicity
l
12
14
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
LSB
ZSTC
Zero Code Tempco
±0.05
ppm/°C
GE
Gain Error
l
±0.5 ±2
±1
±4
±2
±5
±2
±5
LSB
GETC
Gain Error Tempco
±0.1
ppm/°C
ROUT
DAC Output Resistance
(Note 4)
6.2
k
Ω
Bipolar Resistor Matching (LTC2642) RFB/RINV
1
Ratio Error (Note 7) l
±0.1
±0.03
±0.015
%
BZE
Bipolar Zero Offset Error
(LTC2642)
l
±0.5 ±2
±0.5 ±4
±2
±5
±2
±5
LSB
BZSTC
Bipolar Zero Tempco
(LTC2642)
±0.1
ppm/°C
PSR
Power Supply Rejection
ΔVDD = ±10%
l
±0.5
±1
LSB
The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
VDD = 3V or 5V, VREF = 2.5V, CL = 10pF, GND = 0, RL = ∞unless otherwise specified.