LTC1257C View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LTC1257C Datasheet PDF : 12 Pages
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LTC1257
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = TMIN to TMAX. VCC = 4.75V to 15.75V, internal or external reference
(2.475V ≤ VREF ≤ VCC – 2.7V), unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
OFF
Offset Error
When Using Internal Reference, LTC1257C
l
When Using Internal Reference, LTC1257I
l
±8
LSB
±10
LSB
When Using External Reference, LTC1257C
l
When Using External Reference, LTC1257I
l
±4
mV
±5
mV
OFFTC
Offset Error Tempco
When Using Internal Reference (Note 2)
When Using External Reference (Note 2)
l
±0.02 ±0.066 LSB/°C
l
±15
±30
µV/°C
Gain Error
l
0.5
±2
LSB
Gain Error Tempco
(Note 2)
l
±0.01 ±0.02
LSB/°C
Reference
Reference Output Voltage
Reference Output Tempco
Reference Line Regulation
Reference Load Regulation
Reference Input Range
Reference Input Resistance
IREF = 0, LTC1257C
IREF = 0, LTC1257I
IREF = 0
IREF = 0, LTC1257C
IREF = 0, LTC1257I
0µA ≤ IREF ≤ 100µA
VCC > VREF + 2.7V
l 2.028
l 2.018
l
l
l
l
l 2.475
l
8
2.048
±0.06
14
2.068
2.078
±0.4
±0.7
±1
12
18
V
V
LSB/°C
LSB/V
LSB/V
LSB
V
kΩ
Reference Input Capacitance (Note 2)
15
pF
Short-Circuit Current
Power Supply
VREF Shorted to GND
l
90
mA
VCC
Positive Supply Voltage
ICC
Supply Current
Op Amp DC Performance
For Specified Performance
4.75V ≤ VCC ≤ 5.25V
4.75V ≤ VCC ≤ 15.75V
l 4.75
15.75
V
l
350
600
µA
l
800
1500
µA
Short-Circuit Current Low
Short-Circuit Current High
Output Impedance to GND
VOUT Shorted to GND
VOUT Shorted to VCC
Input Code = 0
l
60
mA
l
60
mA
l
250
500
Ω
AC Performance
Voltage Output Slew Rate
5kΩ in Parallel with 100pF
l 1.0
V/µs
Voltage Output Settling Time
Digital Feedthrough
To ±1/2LSB, 5kΩ in Parallel with 100pF, VCC = 4.75V
(Notes 2, 3)
6
µs
50
nV/s
Digital I/O
VIH
Digital Input High Voltage
VIL
Digital Input Low Voltage
VOH
Digital Output High Voltage
VOL
Digital Output Low Voltage
ILEAK
Digital Input Leakage
CIN
Digital Input Capacitance
Switching (Note 2)
IOUT = –1mA, DOUT Only
IOUT = 1mA, DOUT Only
VIN = GND to VCC
(Note 2)
l 2.4
l
l VCC – 1
l 0.4
l
l
V
0.8
V
V
V
±10
µA
10
pF
t1
DIN Valid to CLK Setup
t2
DIN Valid to CLK Hold
t3
CLK High Time
t4
CLK Low Time
l 100
ns
l 25
ns
l 350
ns
l 350
ns
1257fc
3
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