Resistance vs C
參數(shù)資料
型號: LTC1257CN8
廠商: Linear Technology
文件頁數(shù): 8/12頁
文件大?。?/td> 0K
描述: IC D/A CONV 12BIT VOLT OUT 8-DIP
標準包裝: 50
設置時間: 6µs
位數(shù): 12
數(shù)據(jù)接口: 串行
轉換器數(shù)目: 1
電壓電源: 單電源
功率耗散(最大): 1.75mW
工作溫度: 0°C ~ 70°C
安裝類型: 通孔
封裝/外殼: 8-DIP(0.300",7.62mm)
供應商設備封裝: 8-PDIP
包裝: 管件
輸出數(shù)目和類型: 1 電壓,單極
采樣率(每秒): *
LTC1257
5
1257fc
TYPICAL PERFORMANCE CHARACTERISTICS
Differential Nonlinearity (DNL)
Reference Compensation
Resistance vs CL
Broadband Noise
Full-Scale Voltage
vs Temperature
Zero-Scale Voltage
vs Temperature
Integral Nonlinearity (INL)
TEMPERATURE (°C)
–50
FULL-SCALE
VOLTAGE
(V)
2.0495
2.0490
2.0485
2.0480
2.0475
2.0470
2.0465
25
75
1257 G07
–25
0
50
100
125
VCC = 5V
INTERNAL REFERENCE
TEMPERATURE (°C)
–50 –25
25
50
ZERO-SCALE
VOLTAGE
(mV)
75
100
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
1257 G08
0
125
VCC = 5V
INTERNAL REFERENCE
CODE
0
ERROR
(LSB)
2.0
1.6
1.2
0.8
0.4
0
–0.4
–0.8
–1.2
–1.6
–2.0
1024
2048 2560
1257 G09
512
1536
3072 3584 4096
VCC = 5V
INTERNAL REFERENCE
TA = 25°C
CODE
0
DNL
ERROR
(LSBs)
0.5
0.0
–0.5
1024
2048 2560
1257 TA05
512
1536
3072 3584 4098
CL (F)
0.01
REFERENCE
COMPENSATION
RESISTANCE
()
70
60
50
40
30
20
10
0
0.1
1
1257 G11
10
100
TIME = 5ms/DIV
0.1V/DIV
1257 G12
CODE = FFFH
BW = 3Hz TO 1MHz
GAIN = 1100
×
PIN FUNCTIONS
CLK(Pin1):TheTTLlevelinputfortheserialinterfaceclock.
DIN (Pin 2): The TTL level input for the serial interface
data. Data on the DIN pin is latched into the shift register
on the rising edge of the serial clock.
LOAD (Pin 3): The TTL level input for the serial interface
load control. Data is loaded from the shift register into the
DAC register, thus updating the DAC output when LOAD
is pulled low. The DAC register is transparent as long as
LOAD is held low.
DOUT(Pin4):Theoutputoftheshiftregisterwhichbecomes
valid on the rising edge of the serial clock. The DOUT pin
is driven from GND to VCC by an internal CMOS inverter.
Multiple LTC1257s may be cascaded by connecting the
DOUT pin to the DIN pin of the next chip.
GND (Pin 5): Ground.
REF (Pin 6): The output of the 2.048V reference and the
input to the DAC resistor ladder. An external reference
with voltage from 2.475V to VCC – 2.7V may be used to
override the internal reference.
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