Offset Error vs VCC (2x Speed Mode)
參數(shù)資料
型號(hào)： DC798B
廠商： Linear Technology
文件頁(yè)數(shù)： 3/42頁(yè)
文件大?。?/td> 0K
描述： BOARD DELTA SIGMA ADC LTC2480
軟件下載： QuikEval System
設(shè)計(jì)資源： DC798B Design File
DC798B Schematic
標(biāo)準(zhǔn)包裝： 1
系列： QuikEval™
ADC 的數(shù)量： 1
位數(shù)： 16
采樣率（每秒）： 7.5
數(shù)據(jù)接口： MICROWIRE?，串行，SPI?
已用 IC / 零件： LTC2480
已供物品： 板
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LTC2480
2480fd
Typical perForMance characTerisTics
Offset Error vs VCC
(2x Speed Mode)
Offset Error vs VREF
(2x Speed Mode)
PSRR vs Frequency at VCC
(2x Speed Mode)
PSRR vs Frequency at VCC
(2x Speed Mode)
PSRR vs Frequency at VCC
(2x Speed Mode)
VCC (V)
2
2.5
0
OFFSET
ERROR
(V)
100
250
3
4
4.5
2480 G41
50
200
150
3.5
5
5.5
VREF = 2.5V
VIN = 0V
VIN(CM) = GND
fO = GND
TA = 25°C
VREF (V)
0
OFFSET
ERROR
(V)
190
200
210
3
5
2480 G42
180
170
160
1
2
4
220
230
240
VCC = 5V
VIN = 0V
VIN(CM) = GND
fO = GND
TA = 25°C
FREQUENCY AT VCC (Hz)
1
0
–20
–40
–60
–80
–100
–120
–140
1k
100k
2480 G43
10
100
10k
1M
REJECTION
(dB)
VCC = 4.1V DC
REF+ = 2.5V
REF– = GND
IN+ = GND
IN– = GND
fO = GND
TA = 25°C
FREQUENCY AT VCC (Hz)
0
–140
RREJECTION
(dB)
–120
–80
–60
–40
0
20
100
140
2480 G44
–100
–20
80
180
220
200
40 60
120
160
VCC = 4.1V DC ±1.4V
REF+ = 2.5V
REF– = GND
IN+ = GND
IN– = GND
fO = GND
TA = 25°C
FREQUENCY AT VCC (Hz)
30600
–60
–40
0
30750
2480 G45
–80
–100
30650
30700
30800
–120
–140
–20
REJECTION
(dB)
VCC = 4.1V DC ±0.7V
REF+ = 2.5V
REF– = GND
IN+ = GND
IN– = GND
fO = GND
TA = 25°C
pin FuncTions
SDI (Pin 1): Serial Data Input. This pin is used to select
the GAIN, line frequency rejection, input, temperature
sensor and 2x speed mode. Data is shifted into the SDI
pin on the rising edge of serial clock (SCK).
VCC(Pin2):PositiveSupplyVoltage.BypasstoGND(Pin 8)
witha1Ftantalumcapacitorinparallelwith0.1Fceramic
capacitor as close to the part as possible.
VREF (Pin 3): Positive Reference Input. The voltage on
this pin can have any value between 0.1V and VCC. The
negative reference input is GND (Pin 8).
IN+ (Pin 4), IN– (Pin 5): Differential Analog Inputs. The
voltage on these pins can have any value between GND
– 0.3V and VCC + 0.3V. Within these limits the converter
bipolar input range (VIN = IN+ – IN–) extends from –0.5
VREF/GAIN to 0.5 VREF/GAIN. Outside this input range
the converter produces unique overrange and underrange
output codes.
CS (Pin 6): Active LOW Chip Select. A LOW on this pin
enables the digital input/output and wakes up the ADC.
Following each conversion the ADC automatically enters
the sleep mode and remains in this low power state as
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