MCP3911 데이터 시트보기 (PDF) - Microchip Technology
부품명
상세내역
일치하는 목록
MCP3911 Datasheet PDF : 76 Pages
| |||
MCP3911
TABLE 1-1: ANALOG SPECIFICATIONS TARGET TABLE (CONTINUED)
Electrical Specifications: Unless otherwise indicated, all parameters apply at AVDD = DVDD = 2.7V to 3.6V, MCLK = 4 MHz;
PRE<1:0> = 00; OSR = 256; GAIN = 1; VREFEXT = 0, CLKEXT = 1, AZ_FREQ = 0, DITHER<1:0> = 11, BOOST<1:0> = 10;
VCM = 0V; TA = -40°C to +125°C; VIN = 1.2VPP = 424 mVRMS at 50/60 Hz on both channels.
Characteristic
Sym
Min
Typ
Max
Units
Conditions
Internal Voltage Reference
Tolerance
Temperature Coefficient
VREF
TCVREF
1.176
1.2
1.224
V VREFEXT = 0,
TA = +25°C only
—
7
—
ppm/°C TA = -40°C to +125°C,
VREFEXT = 0
Output Impedance
ZOUTVREF
—
2
—
kΩ VREFEXT = 0
Internal Voltage Refer-
AIDDVREF
—
25
—
µA VREFEXT = 0,
ence Operating Current
SHUTDOWN<1:0> = 11
Voltage Reference Input
Input Capacitance
—
—
10
pF
Differential Input Voltage
Range (VREF+ – VREF-)
Absolute Voltage on
REFIN+ pin
VREF
VREF+
1.1
—
VREF- + 1.1 —
1.3
VREF-
+ 1.3
V VREFEXT = 1
V VREFEXT = 1
Absolute Voltage on
REFIN- pin
Master Clock Input
VREF-
-0.1
—
+0.1
V REFIN- should be connected
to AGND when VREFEXT = 0
Master Clock Input
Frequency Range
fMCLK
—
20
MHz CLKEXT = 1, Note 6
Crystal Oscillator
Operating Frequency
Range
fXTAL
1
—
20
MHz CLKEXT = 0, Note 6
Analog Master Clock
AMCLK
—
—
16
MHz Note 6
Power Supply
Operating Voltage, Ana-
log
AVDD
2.7
—
3.6
V
Operating Voltage, Digital
Operating Current,
Analog (Note 2)
DVDD
IDD,A
2.7
—
3.6
—
1.5
2.3
—
1.8
2.8
V
mA BOOST<1:0> = 00
mA BOOST<1:0> = 01
—
2.5
3.5
mA BOOST<1:0> = 10
—
4.4
6.25
mA BOOST<1:0> = 11
Note 1:
2:
3:
4:
5:
6:
This specification implies that the ADC output is valid over this entire differential range and that there is no distortion or
instability across this input range. Dynamic Performance specified at -0.5 dB below the maximum signal range,
VIN = 1.2VPP = 424 mVRMS, VREF = 1.2V at 50/60 Hz. See Section 4.0, Terminologies And Formulas for definition.
This parameter is established by characterization and not 100% tested. See performance graphs for other than default
settings provided here.
For these operating currents, the following configuration bit settings apply: SHUTDOWN<1:0> = 00,
RESET<1:0> = 00, VREFEXT = 0, CLKEXT = 0.
For these operating currents, the following configuration bit settings apply: SHUTDOWN<1:0> = 11, VREFEXT = 1,
CLKEXT = 1.
Applies to all gains. Offset and gain errors depend on PGA gain setting, see Section 2.0, Typical Performance
Curves for typical performance.
Outside of this range, the ADC accuracy is not specified. An extended input range of ±2 V can be applied continuously
to the part with no damage.
For proper operation and optimizing ADC accuracy, AMCLK should be limited to the maximum frequency defined in
Table 5-2 as a function of the BOOST and PGA settings chosen. MCLK can take larger values as long as the prescaler
settings (PRE<1:0>) limit AMCLK = MCLK/PRESCALE in the defined range in Table 5-2.
2012-2013 Microchip Technology Inc.
DS20002286C-page 5
Share Link: 