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TC500A の電気的特性と機能

TC500AのメーカーはMicrochip Technologyです、この部品の機能は「Precision Analog Front Ends」です。


製品の詳細 ( Datasheet PDF )

部品番号 TC500A
部品説明 Precision Analog Front Ends
メーカ Microchip Technology
ロゴ Microchip Technology ロゴ 




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TC500A Datasheet, TC500A PDF,ピン配置, 機能
TC500/A/510/514
Precision Analog Front Ends
Features:
• Precision (up to 17 bits) A/D Converter “Front
End”
• 3-Pin Control Interface to Microprocessor
• Flexible: User Can Trade-off Conversion Speed
www.DataSheet4U.com for Resolution
• Single-Supply Operation (TC510/TC514)
• 4 Input, Differential Analog MUX (TC514)
• Automatic Input Voltage Polarity Detection
• Low Power Dissipation:
- (TC500/TC500A): 10 mW
- (TC510/TC514): 18 mW
• Wide Analog Input Range:
- ±4.2V (TC500A/TC510)
• Directly Accepts Bipolar and Differential
Input Signals
Applications:
• Precision Analog Signal Processor
• Precision Sensor Interface
• High Accuracy DC Measurements
General Description:
TheTC500/A/510/514 family are precision analog front
ends that implement dual slope A/D converters having
a maximum resolution of 17 bits plus sign. As a
minimum, each device contains the integrator, zero
crossing comparator and processor interface logic. The
TC500 is the base (16-bit max) device and requires
both positive and negative power supplies. The
TC500A is identical to the TC500 with the exception
that it has improved linearity, allowing it to operate to a
maximum resolution of 17 bits. The TC510 adds an on-
board negative power supply converter for single-
supply operation. The TC514 adds both a negative
power supply converter and a 4-input differential
analog multiplexer.
Each device has the same processor control interface
consisting of 3 wires: control inputs (A and B) and zero-
crossing comparator output (CMPTR). The processor
manipulates A, B to sequence the TC5XX through four
phases of conversion: auto-zero, integrate, de-inte-
grate and integrator zero. During the auto-zero phase,
offset voltages in the TC5XX are corrected by a closed
loop feedback mechanism. The input voltage is applied
to the integrator during the integrate phase. This
causes an integrator output dv/dt directly proportional
to the magnitude of the input voltage. The higher the
input voltage, the greater the magnitude of the voltage
stored on the integrator during this phase. At the start
of the de-integrate phase, an external voltage
reference is applied to the integrator and, at the same
time, the external host processor starts its on-board
timer. The processor maintains this state until a
transition occurs on the CMPTR output, at which time
the processor halts its timer. The resulting timer count
is the converted analog data. Integrator zero (the final
phase of conversion) removes any residue remaining
in the integrator in preparation for the next conversion.
The TC500/A/510/514 offer high resolution (up to 17
bits), superior 50/60 Hz noise rejection, low-power
operation, minimum I/O connections, low input bias
currents and lower cost compared to other converter
technologies having similar conversion speeds.
© 2006 Microchip Technology Inc.
DS21428D-page 1

1 Page





TC500A pdf, ピン配列
TC500/A/510/514
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings†
TC510/TC514 Positive Supply Voltage
(VDD to GND) ......................................... +10.5V
TC500/TC500A Supply Voltage
(VDD to VSS) .............................................. +18V
TC500/TC500A Positive Supply Voltage
(VDD to GND) ............................................ +12V
TC500/TC500A Negative Supply Voltage
(VSS to GND)................................................-8V
www.DataSheet4U.comAnalog Input Voltage (VIN+ or VIN-) ............VDD to VSS
Logic Input Voltage...............VDD +0.3V to GND - 0.3V
Voltage on OSC:
........................... -0.3V to (VDD +0.3V) for VDD < 5.5V
Ambient Operating Temperature Range:
................................................................ 0°C to +70°C
Storage Temperature Range: ............. -65°C to +150°C
Stresses above those listed under “Absolute Maxi-
mum Ratings” may cause permanent damage to the
device. These are stress ratings only and functional
operation of the device at these or any other conditions
above those indicated in the operation sections of the
specifications is not implied. Exposure to Absolute
Maximum Rating conditions for extended periods may
affect device reliability.
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise specified, TC510/TC514: VDD = +5V, TC500/TC500A: VSS = ±5V.
CAZ = CREF = 0.47 μF.
Parameters
Sym
TA = +25°C
Min. Typ. Max.
TA = 0°C to 70°C
Min.
Typ. Max.
Units
Conditions
Analog
Resolution
60 — —
— — — μV Note 1
Zero-scale Error with ZSE
Auto-zero Phase
— 0.005
— 0.003
— 0.005 0.012 % F.S. TC500/TC510/TC514
— 0.003 0.009
TC500A
End Point Linearity
ENL
— 0.005 0.015
— 0.015 0.060 % F.S. TC500/TC510/TC514
— — 0.010 — 0.010 0.045 % F.S. Note 1, Note 2,
TC500A
Best-Case Straight
NL
— 0.003 0.008
— — % F.S. TC500/TC510/TC514,
Line Linearity
Note 1, Note 2
— — 0.005 — — — % F.S. TC500A
Zero-scale Temp.
ZSTC
Coefficient
—1
2 μV/°C Over Operating
Temperature Range
Full-scale Symmetry SYE
Error (Rollover Error)
— 0.01 —
— 0.03 — % F.S. Note 1
Full-scale
Temperature
Coefficient
FSTC
— 10 — ppm/°C Over Operating
Temperature Range;
External Reference
TC = 0 ppm/°C
Input Current
Common Mode
Voltage Range
IIN — 6 —
— ——
VCMR VSS + 1.5 — VDD – 1.5 VSS + 1.5 — VDD – 1.5
pA VIN = 0V
V
Integrator Output
Swing
VSS + 0.9 — VDD – 0.9 VSS + 0.9 — VSS + 0.9
V
Analog Input Signal
Range
VSS + 1.5 — VDD – 1.5 VSS + 1.5 — VSS + 1.5 V ACOM = GND = 0V
Note 1:
2:
3:
Integrate time 66 msec, auto-zero time 66 msec, VINT (peak) 4V.
End point linearity at ±1/4, ±1/2, ±3/4 F.S. after full-scale adjustment.
Rollover error is related to CINT, CREF, CAZ characteristics.
© 2006 Microchip Technology Inc.
DS21428D-page 3


3Pages


TC500A 電子部品, 半導体
TC500/A/510/514
3.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1: PIN FUNCTION TABLE
Pin No.
TC500,
TC500A
1
2
3
4
5
www.DataSheet4U.com6
7
8
9
10
11
12
13
14
15
16
TC510
2
Not Used
3
4
5
6
7
8
9
15
16
18
17
19
23
21
22
24
1
20
TC514 Symbol
Function
2
Not Used
3
4
5
6
7
8
9
Not Used
Not Used
22
21
23
27
25
26
28
1
24
18
13
17
12
16
11
15
10
20
19
CINT
VSS
CAZ
BUF
Integrator output. Integrator capacitor connection.
Negative power supply input (TC500/TC500A only).
Auto-zero input. The auto-zero capacitor connection.
Buffer output. The Integrator capacitor connection.
ACOM
CREF-
CREF+
VREF-
VREF+
VIN-
VIN+
A
This pin is grounded in most applications. It is recommended that ACOM and the
input common pin (Ven- or CHn-) be within the analog Common Mode Range (CMR).
Input. Negative reference capacitor connection.
Input. Positive reference capacitor connection.
Input. External voltage reference (-) connection.
Input. External voltage reference (+) connection.
Negative analog input.
Positive analog input.
Input. Converter phase control MSB. (See input B.)
B Input. Converter phase control LSB. The states of A, B place the TC5XX in one of
four required phases. A conversion is complete when all four phases have been
executed:
Phase control input pins: AB = 00: Integrator zero
01: Auto-zero
10: Integrate
11: De-integrate
CMPTR Zero crossing comparator output. CMPTR is high during the integration phase when
OUT a positive input voltage is being integrated and is low when a negative input voltage
is being integrated. A high-to-low transition on CMPTR signals the processor that the
De-integrate phase is completed. CMPTR is undefined during the auto-zero phase. It
should be monitored to time the integrator zero phase.
DGND Input. Digital ground.
VDD Input. Power supply positive connection.
CAP+ Input. Negative power supply converter capacitor (+) connection.
CAP- Input. Negative power supply converter capacitor (-) connection.
VOUT- Output. Negative power supply converter output and reservoir capacitor connection.
This output can be used to power other devices in the circuit requiring a negative
bias voltage.
OSC
CH1+
Oscillator control input. The negative power supply converter normally runs at a
frequency of 100 kHz. The converter oscillator frequency can be slowed down (to
reduce quiescent current) by connecting an external capacitor between this pin and
VDD (see Section 2.0 “Typical Performance Curves”).
Positive analog input pin. MUX channel 1.
CH1- Negative analog input pin. MUX channel 1.
CH2+ Positive analog input pin. MUX channel 2.
CH2- Negative analog input pin. MUX channel 2.
CH3+ Positive analog input pin. MUX channel 3.
CH3- Negative analog input pin. MUX channel 3.
CH4+ Positive analog input pin. MUX channel 4.
CH4- Negative analog input pin. MUX channel 4
A0 Multiplexer input channel select input LSB (see A1).
A1 Multiplexer input channel select input MSB.
Phase control input pins: A1, A0 = 00 = Channel 1
01 = Channel 2
10 = Channel 3
11 = Channel 4
DS21428D-page 6
© 2006 Microchip Technology Inc.

6 Page



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共有リンク

Link :


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