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參數(shù)資料
| 型號： | LTC2495CUHF#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | ADC |
| 英文描述： | 16-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PQCC38 |
| 封裝： | 5 X 7 MM, PLASTIC, MO-220WKHD, QFN-38 |
| 文件頁數(shù)： | 2/32頁 |
| 文件大小： | 619K |
| 代理商： | LTC2495CUHF#TR |
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LTC2495
0
2495fa
GND (Pins 1, 4, 6, 31, 32, 33, 34): Ground. Multiple
groundpinsinternallyconnectedforoptimumgroundcur-
rent flow and VCC decoupling. Connect each one of these
pins to a common ground plane through a low impedance
connection. All seven pins must be connected to ground
for proper operation.
SCL (Pin 2): Serial Clock Pin of the I2C Interface. The
LTC2495 can only act as a slave and the SCL pin only ac-
cepts an external serial clock. Data is shifted into the SDA
pinontherisingedgesoftheSCLclockandoutputthrough
the SDA pin on the falling edges of the SCL clock.
SDA (Pin 3): Bidirectional Serial Data Line of the I2C Inter-
face.Inthetransmittermode(Read),theconversionresult
is output through the SDA pin, while in the receiver mode
(Write), the device channel select and configuration bits
are input through the SDA pin. The pin is high impedance
during the data input mode and is an open drain output
(requires an appropriate pull-up device to VCC) during the
data output mode.
NC (Pin 5): No Connect. This pin can be left floating or
tied to GND.
COM (Pin 7): The Common Negative Input (IN–) for All
Single-Ended Multiplexer Configurations. The voltage on
CH0-CH15 and COM pins can have any value between
GND – 0.3V to VCC + 0.3V. Within these limits, the two
selected inputs (IN+ and IN– ) provide a bipolar input range
VIN = (IN+ – IN–) from –0.5 VREF/Gain to 0.5 VREF/Gain.
Outside this input range, the converter produces unique
over-range and under-range output codes.
CH0 to CH15 (Pin 8-Pin 23): Analog Inputs. May be pro-
grammed for single-ended or differential mode.
MUXOUTP (Pin 24): Positive Multiplexer Output. Connect
to the input of external buffer/amplifier or short directly
to ADCINP.
ADCINP (Pin 25): Positive ADC Input. Connect to the
output of a buffer/amplifier driven by MUXOUTP or short
directly to MUXOUTP.
Typical perFormance characTerisTics
PSRR vs Frequency at VCC
(2x Speed Mode)
PSRR vs Frequency at VCC
(2x Speed Mode)
pin FuncTions
PSRR vs Frequency at VCC
(2x Speed Mode)
FREQUENCY AT VCC (Hz)
1
0
–20
–40
–60
–80
–100
–120
–140
1k
100k
2495 G36
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
2495 G37
–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
2495 G38
–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
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