LTC1863L/LTC1867L
3
1863l7lfc
CONVERTER CHARACTERISTICS The l denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. VDD = 2.7V, external VREF = 1.25V (Notes 5, 6)
PARAMETER
CONDITIONS
LTC1863L
LTC1867L
LTC1867LA
UNITS
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
Gain Error
Unipolar
Bipolar
±6
±96
±64
LSB
Gain Error Match
Unipolar
Bipolar
±1
±4
±3
LSB
Gain Error Tempco
Internal Reference
External Reference
±20
±3
±20
±3
±20
±3
ppm/°C
Power Supply Sensitivity
VDD = 2.7V – 3.6V
±1
±3
LSB
DYNAMIC ACCURACY V
DD = 3V, external VREF = 1.25V (Note 5)
SYMBOL
PARAMETER
CONDITIONS
LTC1863L
LTC1867L/LTC1867LA
UNITS
MIN
TYP
MAX
MIN
TYP
MAX
SNR
Signal-to-Noise Ratio
1kHz Input Signal
73.1
83.7
dB
S/(N+D)
Signal-to-(Noise + Distortion) Ratio 1kHz Input Signal
73
83.1
dB
THD
Total Harmonic Distortion
1kHz Input Signal, Up to 5th Harmonic
–91.8
– 92.3
dB
Peak Harmonic or Spurious Noise
1kHz Input Signal
–94.8
– 95.1
dB
Channel-to-Channel Isolation
100kHz Input Signal
–100
–112
dB
Full Power Bandwidth
–3dB Point
1.25
MHz
ANALOG INPUT
SYMBOL
PARAMETER
CONDITIONS
LTC1863L/LTC1867L/LTC1867LA
UNITS
MIN
TYP
MAX
Analog Input Range
Unipolar Mode (Note 9)
Bipolar Mode
●
0 to 2.5
±1.25
V
CIN
Analog Input Capacitance for CH0 to
CH7/COM
Between Conversions (Sample Mode)
During Conversions (Hold Mode)
32
4
pF
tACQ
Sample-and-Hold Acquisition Time
●
2.01
1.68
μs
Input Leakage Current
On Channels, CHX = 0V or VDD
●
±1
μA
The
● denotes the specications which apply over the full operating temperature range, otherwise
specications are at TA = 25°C. (Note 5)
DIGITAL INPUTS AND DIGITAL OUTPUTS
SYMBOL
PARAMETER
CONDITIONS
LTC1863L/LTC1867L/LTC1867LA
UNITS
MIN
TYP
MAX
VIH
High Level Input Voltage
VDD = 3.6V
●
1.9
V
VIL
Low Level Input Voltage
VDD = 2.7V
●
0.45
V
The
● denotes the specications which apply over the
full operating temperature range, otherwise specications are at TA = 25°C. (Note 5)
INTERNAL REFERENCE CHARACTERISTICS
PARAMETER
CONDITIONS
LTC1863L/LTC1867L/LTC1867LA
UNITS
MIN
TYP
MAX
VREF Output Voltage
IOUT = 0
1.235
1.25
1.265
V
VREF Output Tempco
IOUT = 0
±20
ppm/°C
VREF Line Regulation
2.7V ≤ VDD ≤ 3.6V
0.3
mV/V
VREF Output Resistance
IOUT ≤0.1mA
3
kΩ
REFCOMP Output Voltage
IOUT = 0
2.5
V
(Note 5)