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TC500COE View Datasheet(PDF) - TelCom Semiconductor Inc => Microchip

Part NameTC500COE TelCom-Semiconductor
TelCom Semiconductor Inc => Microchip TelCom-Semiconductor
DescriptionPRECISION ANALOG FRONT ENDS
TC500COE Datasheet PDF : 17 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
EVALUATION
KIT
AVAILABLE
1 TC500
TC500A
TC510
TC514
PRECISION ANALOG FRONT ENDS
2
FEATURES
GENERAL DESCRIPTION
s Precision (up to 17 Bits) A/D Converter "Front End"
The TC500/500A/510/514 family are precision analog
s 3-Pin Control Interface to Microprocessor
front ends that implement dual slope A/D converters having
s Flexible: User Can Trade-Off Conversion Speed
a maximum resolution of 17 bits plus sign. As a minimum,
for Resolution
each device contains the integrator, zero crossing compara-
s Single Supply Operation (TC510/514)
s 4 Input, Differential Analog MUX (TC514)
s Automatic Input Voltage Polarity Detection
tor and processor interface logic. The TC500 is the base
3 (16 bit max) device and requires both positive and negative
power supplies. The TC500A is identical to the TC500,
s Low Power Dissipation ........... TC500/500A: 10mW except it has improved linearity allowing it to operate to a
TC510/514: 18mW maximum resolution of 17 bits. The TC510 adds an on-
s Wide Analog Input Range ....... ±4.2V (TC500A/510) board negative power supply converter for single supply
s Directly Accepts Bipolar and Differential Input
operation. The TC514 adds both a negative power supply
Signals
converter and a 4 input differential analog multiplexer.
ORDERING INFORMATION
Part No.
Package
Temp. Range
Each device has the same processor control interface
4 consisting of 3 wires: control inputs A and B and zero-
crossing comparator output (CMPTR). The processor ma-
nipulates A, B to sequence the TC5xx through four phases
TC500ACOE
TC500ACPE
TC500COE
TC500CPE
TC510COG
TC510CPF
TC514COI
16-Pin SOIC
16-Pin Plastic DIP (Narrow)
16-Pin SOIC
16-Pin Plastic DIP (Narrow)
24-Pin SOIC
24-Pin Plastic DIP (300 Mil.)
28-Pin SOIC
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
of conversion: Auto Zero, Integrate, Deintegrate and Inte-
grator Zero. During the Auto Zero phase, offset voltages in
the TC5xx are corrected by a closed-loop feedback mecha-
nism. The input voltage is applied to the integrator during the
Integrate phase. This causes an integrator output dv/dt
5 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
TC514CPJ
28-Pin Plastic DIP (300 Mil.) 0°C to +70°C start of the Deintegrate phase, an external voltage reference
TC500EV
Evaluation Kit for TC500/500A/510/514
is applied to the integrator, and at the same time, the external
host processor starts its on-board timer. The processor main-
FUNCTIONAL BLOCK DIAGRAM
A0 A1
CR+EF
CREF
VR+EF
VR–EF
CR–EF
RINT
CINT
CAZ
BUF CAZ
A
0
0
1
CINT 1
CONTROL LOGIC
B
CONVERTER STATE
0
ZERO INTEGRATOR OUTPUT
1
AUTO-ZERO
0
SIGNAL INTEGRATE
1
DEINTEGRATE
6
CH1 +
CH2 +
CH3 +
CH4 +
CH1
CH2
CH3
CH4
ACOM
VS
OSC
DIF.
MUX
(TC514)
SWI
SWZ
SWI
SWR SWR
SWR–I SWR+I
BUFFER
+
INTEGRATOR
CMPTR 1
+
+
TC500
TC500A
TC510
CMPTR 2 TC514
LEVEL
+
SHIFT
SWR+I SWR–I
SWIZ SWZ
POLARITY
DETECTION
SW1
DC-TO-DC
CONVERTER
(TC510 & TC514)
ANALOG
SWITCH
CONTROL
SIGNALS
VO–UT CAP– CAP+
PHASE
DECODING
LOGIC
CMPTR
OUTPUT
DGND
7
TELCOM SEMICONDUCTOR, INC.
1.0µF
CO–UT
1.0µF
VSS
(TC500
TC500A)
AB
CONTROL LOGIC
8
TC500/A/510/514-3 10/3/96
3-19
Direct download click here
 

GENERAL DESCRIPTION
The TC500/500A/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, except 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.

FEATURES
■ Precision (up to 17 Bits) A/D Converter "Front End"
■ 3-Pin Control Interface to Microprocessor
■ Flexible: User Can Trade-Off Conversion Speed for Resolution
■ Single Supply Operation (TC510/514)
■ 4 Input, Differential Analog MUX (TC514)
■ Automatic Input Voltage Polarity Detection
■ Low Power Dissipation ........... TC500/500A: 10mW
                                          TC510/514: 18mW
■ Wide Analog Input Range ....... ±4.2V (TC500A/510)
■ Directly Accepts Bipolar and Differential Input Signals

 

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