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Numéro de référence | TC500A | ||
Description | (TC5xx) PRECISION ANALOG FRONT ENDS | ||
Fabricant | TelCom Semiconductor | ||
Logo | |||
1 Page
( DataSheet : www.DataSheet4U.com )
PRECISION ANALOG FRONT ENDS
PRECISION ANALOG FRONT ENDS
EVALUATION
KIT
AVAILABLE
TTCC55000
TTCC550000A
TTCC55110
TTCC55114
FEATURES
s Precision (up to 17 Bits) A/D Converter "Front End"
s 3-Pin Control Interface to Microprocessor
s Flexible: User Can Trade-Off Conversion Speed
for Resolution
s Single Supply Operation (TC510/514)
s 4 Input, Differential Analog MUX (TC514)
s Automatic Input Voltage Polarity Detection
s Low Power Dissipation ........... TC500/500A: 10mW
TC510/514: 18mW
s Wide Analog Input Range ....... ±4.2V (TC500A/510)
s Directly Accepts Bipolar and Differential Input
Signals
ORDERING INFORMATION
Part No.
TC500ACOE
TC500ACPE
TC500COE
TC500CPE
TC510COG
TC510CPF
TC514COI
TC514CPJ
TC500EV
Package
Temp. Range
16-Pin SOIC
0°C to +70°C
16-Pin Plastic DIP (Narrow) 0°C to +70°C
16-Pin SOIC
0°C to +70°C
16-Pin Plastic DIP (Narrow) 0°C to +70°C
24-Pin SOIC
0°C to +70°C
24-Pin Plastic DIP (300 Mil.) 0°C to +70°C
28-Pin SOIC
0°C to +70°C
28-Pin Plastic DIP (300 Mil.) 0°C to +70°C
Evaluation Kit for TC500/500A/510/514
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 compara-
tor 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.
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 ma-
nipulates A, B to sequence the TC5xx through four phases
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
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 Deintegrate 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
FUNCTIONAL BLOCK DIAGRAM
CH1 +
CH2 +
CH3 +
CH4 +
CH1 –
CH2 –
CH3 –
CH4 –
ACOM
VS
OSC
A0 A1
DIF.
MUX
(TC514)
CR+EF
CREF
VR+EF
VR–EF
CR–EF
RINT
CINT
CAZ
BUF CAZ
CINT
A
0
0
1
1
CONTROL LOGIC
B CONVERTER STATE
0 ZERO INTEGRATOR OUTPUT
1 AUTO-ZERO
0 SIGNAL INTEGRATE
1 DEINTEGRATE
SWR SWR
SWI
SWR–I SWR+I
BUFFER
–
+
INTEGRATOR
– CMPTR 1
+
+
–
TC500
TC500A
TC510
CMPTR 2 TC514
–
LEVEL
+ SHIFT
CMPTR
OUTPUT
SWZ
SWR+I SWR–I
SWIZ SWZ
POLARITY
DETECTION
SW1
SWI
DC-TO-DC
CONVERTER
(TC510 & TC514)
ANALOG
SWITCH
CONTROL
SIGNALS
VO–UT CAP– CAP+
PHASE
DECODING
LOGIC
DGND
1.0µF
CO–UT
1.0µF
VSS
(TC500
TC500A)
AB
CONTROL LOGIC
TC500/A/510/514-3 10/3/96 TelCom Semiconductor reserves the right to make changes in the circuitry1and specifications of its devices.
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Pages | Pages 20 | ||
Télécharger | [ TC500A ] |
No | Description détaillée | Fabricant |
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