Datasheet
LTC1669
3
1669fa
ELECTRICAL CHARACTERISTICS
The ● denotes specifi cations which apply over the full operating tempera-
ture range, otherwise specifi cations are at T
A
= 25°C. V
CC
= 2.7V to 5.5V, V
CC
set as reference, V
OUT
unloaded, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
DAC
Resolution
l
10 Bits
Monotonicity (Note 2)
l
10 Bits
DNL Differential Nonlinearity Guaranteed Monotonic (Note 2)
l
±0.2 ±0.75 LSB
INL Integral Nonlinearity (Note 2)
l
±0.5 ± 2.5 LSB
V
OS
Offset Error Measured at Code 20
l
±10 ±30 mV
V
OSTC
Offset Error Temperature Coeffi cient ±15 μV/°C
FSE Full-Scale Error Reference Set to V
CC
Reference Set to Internal Bandgap
l
l
±3
±3
±15
±15
LSB
LSB
V
OUT
DAC Output Span Reference Set to V
CC
Reference Set to Internal Bandgap
0 to V
CC
0 to 2.5
V
V
V
FSTC
Full-Scale Voltage Temperature
Coeffi cient
Reference Set to V
CC
Reference Set to Internal Bandgap
±30
±50
μV/°C
μV/°C
PSRR Power Supply Rejection Ratio Reference Set to Internal Bandgap,
Code = 1023
±0.4 LSB/V
Power Supply
V
CC
Positive Supply Voltage
l
2.7 5.5 V
I
CC
Supply Current V
CC
= 3V (Note 3)
V
CC
= 5V (Note 3)
l
l
60
75
100
125
μA
μA
I
SD
Supply Current in Shutdown Mode (Note 3)
l
12 24 μA
Op Amp DC Performance
Short-Circuit Current (Sourcing) V
OUT
Shorted to GND, Input Code = 1023
l
25 100 mA
Short-Circuit Current (Sinking) V
OUT
Shorted to V
CC
, Input Code = 0
l
30 120 mA
Output Impedance to GND Input Code = 0, V
CC
= 5V
Input Code = 0, V
CC
= 5V
In Shutdown Mode
65
150
500
Ω
Ω
kΩ
Output Impedance to V
CC
Input Code = 1023, V
CC
= 5V
Input Code = 1023, V
CC
= 5V
80
120
Ω
Ω
AC Performance
Voltage Output Slew Rate Rising (Notes 4, 5)
Falling (Notes 4, 5)
0.75
0.25
V/μs
V/μs
Voltage Output Settling Time To ±0.5LSB (Notes 4, 5) 30 μs
Digital Feedthrough 0.75 nV•s
Digital-to-Analog Glitch Impulse 1LSB Change Around Major Carry 70 nV•s
Digital Inputs SCL, SDAs
V
IH
High Level Input Voltage
l
2.1 V
V
IL
Low Level Input Voltage
l
1.5 V
V
LT H
Logic Threshold Voltage 1.8 V
I
LEAK
Digital Input Leakage V
CC
= 5.5V and 0V, V
IN
= GND to V
CC
l
±1 μA
C
IN
Digital Input Capacitance (Note 7)
l
10 pF
Digital Output SDA
V
OL
Digital Output Low Voltage I
PULLUP
= 3mA
l
0.4 V