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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
PRECISION ANALOG FRONT ENDS
1 TC500
TC500A
TC510
TC514
PIN DESCRIPTION
Pin No
Pin No
(TC500, 500A) (TC510)
1
2
2
Not Used
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
15
11
16
12
18
13
17
14
19
15
23
16
21
22
24
1
20
Pin No
(TC514)
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
Symbol Description
CINT
VSS
CAZ
BUF
ACOM
CR–EF
CR+ EF
VR– EF
VR+ EF
VI–N
VI+N
A
B
CMPTR OUT
DGND
VDD
CAP+
CAP–
VO– UT
OSC
CH1+
CH1
CH2+
CH2
CH3+
CH3
CH4+
Integrator output. Integrator capacitor connection.
Negative power supply input (TC500/500A only).
Auto-zero input. The Auto-zero capacitor connection.
Buffer output. The Integrator capacitor connection.
This pin is grounded in most applications. It is recommended that
ACOM and the input common pin (VI–N or C–HN ) 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.)
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:
00: Integrator Zero
Phase control input pins: AB =
01: Auto Zero
10: Integrate
11: Deintegrate
Zero crossing comparator output. CMPTR is HIGH during the
Integration phase when 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
Deintegrate phase is completed. CMPTR is undefined during the
Auto-Zero phase. It should be monitored to time the Integrator Zero
phase (see text).
Input. Digital ground.
Input. Power supply positive connection.
Input. Negative power supply converter capacitor (+) connection.
Input. Negative power supply converter capacitor (–) connection.
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.
Oscillator control input. The negative power supply converter normally
runs at a frequency of 100kHz. The converter oscillator frequency can
be slowed down (to reduce quiescent current) by connecting an
external capacitor between this pin and VDD. (See Typical Character-
istics Curves).
Positive analog input pin. MUX channel 1.
Negative analog input pin. MUX channel 1.
Positive analog input pin. MUX channel 2.
Negative analog input pin. MUX channel 2.
Positive analog input pin. MUX channel 3.
Negative analog input pin. MUX channel 3.
Positive analog input pin. MUX channel 4.
2
3
4
5
6
7
8
TELCOM SEMICONDUCTOR, INC.
3-23
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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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