
3
LTC1409
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
S/(N + D)
Signal-to-Noise Plus Distortion Ratio 100kHz Input Signal (Note 12)
q
70
73.0
dB
400kHz Input Signal (Note 12)
q
68
72.5
dB
THD
Total Harmonic Distortion
100kHz Input Signal, First Five Harmonics
– 90
dB
400kHz Input Signal, First Five Harmonics
q
– 86
– 74
dB
Peak Harmonic or Spurious Noise
400kHz Input Signal
q
– 90
– 74
dB
IMD
Intermodulation Distortion
fIN1 = 29.37kHz, fIN2 = 32.446kHz
– 84
dB
Full Power Bandwidth
15
MHz
Full Linear Bandwidth
S/(N + D)
≥ 68dB
1.6
MHz
(Note 5)
ACCURACY
IC
DY
U
W
A
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VREF Output Voltage
IOUT = 0
2.480
2.500
2.520
V
VREF Output Tempco
IOUT = 0
±15
ppm/
°C
VREF Line Regulation
4.75V
≤ VDD ≤ 5.25V
0.01
LSB/V
– 5.25V
≤ VSS ≤ – 4.75V
0.01
LSB/V
VREF Output Resistance
– 0.1mA
≤ |IOUT| ≤ 0.1mA
4
k
REFCOMP Output Voltage
IOUT = 0
4.06
V
(Note 5)
I TER AL REFERE CE CHARACTERISTICS
U
UU
(Note 5)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIH
High Level Input Voltage
VDD = 5.25V
q
2.4
V
VIL
Low Level Input Voltage
VDD = 4.75V
q
0.8
V
IIN
Digital Input Current
VIN = 0V to VDD
q
±10
A
CIN
Digital Input Capacitance
5pF
VOH
High Level Output Voltage
VDD = 4.75V
IO = – 10A
4.5
V
IO = – 200A
q
4.0
V
VOL
Low Level Output Voltage
VDD = 4.75V
IO = 160A
0.05
V
IO = 1.6mA
q
0.10
0.4
V
IOZ
High-Z Output Leakage D11 to D0
VOUT = 0V to VDD, CS High
q
±10
A
COZ
High-Z Output Capacitance D11 to D0
CS High (Note 9 )
q
15
pF
ISOURCE
Output Source Current
VOUT = 0V
– 10
mA
ISINK
Output Sink Current
VOUT = VDD
10
mA
(Note 5)
DIGITAL I PUTS A D DIGITAL OUTPUTS
U
POWER REQUIRE E TS
W U
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VDD
Positive Supply Voltage
(Notes 10, 11)
4.75
5.25
V
VSS
Negative Supply Voltage
(Note 10)
– 4.75
– 5.25
V
IDD
Positive Supply Current
CS High
q
6.0
9.0
mA
Nap Mode
CONVST = CS = RD = SHDN = 0V, NAP/SLP = 5V
0.8
1.2
mA
Sleep Mode
CONVST = CS = RD = SHDN = 0V, NAP/SLP = 0V
1.0
A