3
LTC1666/LTC1667/LTC1668
The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VDD = 5V, VSS = – 5V, LADCOM = AGND = DGND = 0V, IOUTFS = 10mA.
ELECTRICAL CHARACTERISTICS
LTC1666
LTC1667
LTC1668
SYMBOL PARAMETER
CONDITIONS
MIN
TYP MAX
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
DC Accuracy (Measured at IOUT A, Driving a Virtual Ground)
Resolution
q
12
14
16
Bits
Monotonicity
12
14
Bits
INL
Integral Nonlinearity
(Note 2)
±1
±2
±8
LSB
DNL
Differential Nonlinearity
(Note 2)
±1
±4
LSB
Offset Error
0.1
±0.2
0.1
±0.2
0.1
±0.2
% FSR
Offset Error Drift
5
ppm/
°C
GE
Gain Error
Internal Reference, RIREFIN = 2k
2
% FSR
External Reference,
1
% FSR
VREF = 2.5V, RIREFIN = 2k
Gain Error Drift
Internal Reference
50
ppm/
°C
External Reference
30
ppm/
°C
PSRR
Power Supply
VDD = 5V ±5%
±0.1
±0.1 % FSR/V
Rejection Ratio
VSS = – 5V ±5%
±0.2
±0.2 % FSR/V
AC Linearity
SFDR
Spurious Free Dynamic
fCLK = 25Msps, fOUT = 1MHz
Range to Nyquist
0dB FS Output
76
78
87
dB
– 6dB FS Output
87
dB
–12dB FS Output
83
dB
fCLK = 50Msps, fOUT = 1MHz
85
dB
fCLK = 50Msps, fOUT = 2.5MHz
81
dB
fCLK = 50Msps, fOUT = 5MHz
79
dB
fCLK = 50Msps, fOUT = 20MHz
70
dB
Spurious Free Dynamic
fCLK = 25Msps,
85
86
96
dB
Range Within a Window
fOUT = 1MHz, 2MHz Span
fCLK = 50Msps,
88
dB
fOUT = 5MHz, 4MHz Span
THD
Total Harmonic Distortion fCLK = 25Msps, fOUT = 1MHz
–75
–77
– 84
– 77
dB
fCLK = 50Msps, fOUT = 5MHz
– 78
dB