Instrukcja obsługi Microchip MCP6S91

Microchip Niesklasyfikowane MCP6S91

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2004 Microchip Technology Inc. DS21908A-page 1
MCP6S91/2/3
Features
• Multiplexed Inputs: 1 or 2 channels
• 8 Gain Selections:
- +1, +2, +4, +5, +8, +10, +16 or +32 V/V
• Serial Peripheral Interface (SPI™)
• Rail-to-Rail Input and Output
• Low Gain Error: ±1% (max.)
• Offset Mismatch Between Channels: 0 µV
• High Bandwidth: 1 to 18 MHz (typ.)
• Low Noise: 10 nV/√Hz @ 10 kHz (typ.)
• Low Supply Current: 1.0 mA (typ.)
• Single Supply: 2.5V to 5.5V
• Extended Temperature Range: -40°C to +125°C
Typical Applications
• A/D Converter Driver
• Multiplexed Analog Applications
• Data Acquisition
• Industrial Instrumentation
• Test Equipment
• Medical Instrumentation
Block Diagram
Description
The Microchip Technology Inc. MCP6S91/2/3 are
analog Programmable Gain Amplifiers (PGAs). They
can be configured for gains from +1 V/V to +32 V/V and
the input multiplexer can select one of up to two chan-
nels through a SPI port. The serial interface can also
put the PGA into shutdown to conserve power. These
PGAs are optimized for high-speed, low offset voltage
and single-supply operation with rail-to-rail input and
output capability. These specifications support single-
supply applications needing flexible performance or
multiple inputs.
The one-channel MCP6S91 and the two-channel
MCP6S92 are available in 8-pin PDIP, SOIC and MSOP
packages. The two-channel MCP6S93 is available in a
10-pin MSOP package. All parts are fully specified from
-40°C to +125°C.
Package Types
VOUT
VREF
VDD
CS
SI
SO
SCK
CH1
CH0
VSS
8
RF
RG
MUX
SPI™
Logic
Gain
Switches
Resistor Ladder (RLAD)
VREF
CH0
VSS
SI
SCK
1
2
3
4
8
7
6
5
VDD
CS
VOUT
MCP6S91
PDIP, SOIC, MSOP
CH1
CH0
VSS
SI
SCK
1
2
3
4
8
7
6
5
VDD
CS
VOUT
MCP6S92
PDIP, SOIC, MSOP
CH0
VOUT
CH1
CS
1
2
3
4
10
9
8
7 SI
SCK
5 6
VREF
VDD
SO
VSS
MCP6S93
MSOP
Single-Ended, Rail-to-Rail I/O, Low-Gain PGA
2004 Microchip Technology Inc. DS21908A-page 2
MCP6S91/2/3
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings †
VDD – VSS ........................................................................7.0V
All inputs and outputs..................... VSS – 0.3V to VDD + 0.3V
Difference Input voltage ....................................... |V
DD – V SS|
Output Short Circuit Current ..................................continuous
Current at Input Pin .............................................................±2 mA
Current at Output and Supply Pins ................................ ±30 mA
Storage temperature .....................................-65°C to +150°C
Junction temperature .................................................. +150°C
ESD protection on all pins (HBM; MM) ................ ≥4 kV; 200V
† Notice: Stresses above those listed under “Maximum
Ratings” may cause permanent damage to the device. This is
a stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operational listings of this specification is not implied.
Exposure to maximum rating conditions for extended periods
may affect device reliability.
PIN FUNCTION TABLE
Name Function
VOUT Analog Output
CH0, CH1 Analog Inputs
VREF External Reference Pin
VSS Negative Power Supply
CS SPI Chip Select
SI SPI Serial Data Input
SO SPI Serial Data Output
SCK SPI Clock Input
VDD Positive Power Supply
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, TA= +25°C, VDD = +2.5V to +5.5V, V SS = GND, VREF = VSS, G = +1 V/V,
Input = CH0 = (0.3V)/G, CH1 = 0.3V, RL= 10 kΩ to VDD/2, SI and SCK are tied low and CS is tied high.
Parameters Sym Min Typ Max Units Conditions
Amplifier Inputs (CH0, CH1)
Input Offset Voltage V OS -4 — +4 mV G = +1
Input Offset Voltage Mismatch ∆VOS — 0 — µV Between inputs (CH0, CH1)
Input Offset Voltage Drift ∆VOS / T∆A— ±1.8 — µV/°C TA = -40°C to +125°C
Power Supply Rejection Ratio PSRR 70 90 — dB G = +1 (Note 1)
Input Bias Current IB— ±1 — pA CHx = VDD/2
Input Bias Current at
Temperature
IB— 30 — pA CHx = VDD/2, TA = +85°C
IB— 600 — pA CHx = V DD/2, TA = +125°C
Input Impedance ZIN — 1013||7 — Ω||pF
Input Voltage Range VIVR VSS − 0.3 — VDD + 0.3 V (Note 2)
Reference Input (VREF)
Input Impedance ZIN_REF — (5/G)||6 — kΩ||pF
Voltage Range VIVR_REF VSS — VDD V (Note 2)
Amplifier Gain
Nominal Gains G — 1 to 32 — V/V +1, +2, +4, +5, +8, +10, +16 or +32
DC Gain Error G = +1 gE-0.2 — +0.2 % VOUT ≈ 0.3V to VDD −0.3V
G ≥ +2 gE-1.0 — +1.0 % VOUT ≈ 0.3V to VDD −0.3V
DC Gain Drift G = +1 ∆ ∆G/ TA— ±0.0002 — %/°C TA = -40°C to +125°C
G G/≥ +2 ∆ ∆TA— ±0.0004 — %/°C TA = -40°C to +125°C
Note 1: RLAD (RF+RG in Figure 4-1) connects VREF, VOUT and the inverting input of the internal amplifier. The MCP6S92 has
VREF tied internally to V SS
, so VSS is coupled to the internal amplifier and the PSRR spec describes PSRR+ only. It is
recommended that the MCP6S92’s V SS
pin be tied directly to ground to avoid noise problems.
2: The MCP6S92’s VIVR and VIVR_REF are not tested in production; they are set by design and characterization.
3: IQ includes current in RLAD (typically 60 µA at VOUT = 0.3V). Both IQ and IQ_SHDN exclude digital switching currents.
2004 Microchip Technology Inc. DS21908A-page 3
MCP6S91/2/3
Ladder Resistance
Ladder Resistance RLAD 3.4 4.9 6.4 kΩ(Note 1)
Ladder Resistance across
Temperature
∆RLAD/ T∆A— +0.028 — %/°C TA = -40°C to +125°C (Note 1)
Amplifier Output
DC Output Non-linearity G = +1 VONL — ±0.18 — % of FSR VOUT ≈ 0.3V to VDD −0.3V, VDD = 5.0V
G ≥ +2 VONL — ±0.050 — % of FSR VOUT ≈ 0.3V to VDD −0.3V, VDD = 5.0V
Maximum Output Voltage Swing V OH_ANA,
VOL_ANA
VSS + 20 — VDD – 100 mV G ≥ +2; 0.5V output overdrive
VSS + 60 — VDD – 60 G ≥ +2; 0.5V output overdrive,
V
REF = VDD/2
Short Circuit Current ISC — ±25 — mA
Power Supply
Supply Voltage VDD 2.5 — 5.5 V
Minimum Valid Supply Voltage V DD_VAL — 0.4 2.0 V Register data still valid
Quiescent Current IQ0.4 1.0 1.6 mA IO = 0 (Note 3)
Quiescent Current, Shutdown
Mode
IQ_SHDN — 30 — pA IO = 0 (Note 3)
DC CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise indicated, TA= +25°C, VDD = +2.5V to +5.5V, VSS = GND, VREF = VSS, G = +1 V/V,
Input = CH0 = (0.3V)/G, CH1 = 0.3V, RL= 10 kΩ to VDD/2, SI and SCK are tied low and CS is tied high.
Parameters Sym Min Typ Max Units Conditions
Note 1: RLAD (RF+RG in Figure 4-1) connects VREF, VOUT and the inverting input of the internal amplifier. The MCP6S92 has
VREF tied internally to VSS, so VSS is coupled to the internal amplifier and the PSRR spec describes PSRR+ only. It is
recommended that the MCP6S92’s V SS pin be tied directly to ground to avoid noise problems.
2: The MCP6S92’s VIVR and V
IVR_REF are not tested in production; they are set by design and characterization.
3: IQ includes current in RLAD (typically 60 µA at VOUT = 0.3V). Both IQ and IQ_SHDN exclude digital switching currents.

Specyfikacje produktu

Marka: Microchip
Kategoria: Niesklasyfikowane
Model: MCP6S91

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