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TC7135CKW

Description
4-1/2 Digit A/D Converter
CategoryAnalog mixed-signal IC    converter   
File Size443KB,28 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
Environmental Compliance
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TC7135CKW Overview

4-1/2 Digit A/D Converter

TC7135CKW Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
Parts packaging codeQFP
package instructionQFP, QFP44,.52SQ,32
Contacts64
Reach Compliance Codecompli
Maximum analog input voltage2 V
Converter typeADC, DUAL-SLOPE
JESD-30 codeS-PQFP-G64
JESD-609 codee3
length10 mm
Maximum linear error (EL)0.005%
Humidity sensitivity level3
Nominal negative supply voltage-5 V
Number of analog input channels1
Number of functions1
Number of terminals64
Maximum operating temperature70 °C
Minimum operating temperature
Output bit codeBINARY CODED DECIMAL
Package body materialPLASTIC/EPOXY
encapsulated codeQFP
Encapsulate equivalent codeQFP44,.52SQ,32
Package shapeSQUARE
Package formFLATPACK
Peak Reflow Temperature (Celsius)260
power supply+-5 V
Certification statusNot Qualified
Maximum seat height2.35 mm
Nominal supply voltage5 V
surface mountYES
Temperature levelCOMMERCIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch0.8 mm
Terminal locationQUAD
Maximum time at peak reflow temperature40
width10 mm
Base Number Matches1
TC7135
4-1/2 Digit A/D Converter
Features
Low Rollover Error: ±1 Count Max
Nonlinearity Error: ±1 Count Max
Reading for 0V Input
True Polarity Indication at Zero for Null Detection
Multiplexed BCD Data Output
TTL-Compatible Outputs
Differential Input
Control Signals Permit Interface to UARTs and
Microprocessors
Blinking Display Visually Indicates Overrange
Condition
Low Input Current: 1 pA
Low Zero Reading Drift: 2 µV/°C
Auto-Ranging Supported with Overrange and
Underrange Signals
Available in PDIP and Surface-Mount Packages
General Description
The TC7135 4-1/2 digit A/D Converter (ADC) offers
50 ppm (1 part in 20,000) resolution with a maximum
nonlinearity error of 1 count. An auto-zero cycle
reduces zero error to below 10 µV and zero drift to
0.5 µV/°C. Source impedance errors are minimized by
a 10 pA maximum input current. Rollover error is
limited to ±1 count.
Microprocessor-based measurement systems are
supported by the BUSY, STROBE and RUN/HOLD
control signals. Remote data acquisition systems with
data transfer via UARTs are also possible. The
additional control pins and multiplexed BCD outputs
make the TC7135 the ideal converter for display or
microprocessor-based measurement systems.
Applications
• Precision Analog Signal Processor
• Precision Sensor Interface
• High Accuracy DC Measurements
Functional Block Diagram
Set V
REF
= 1V
V
REF
IN
100 kΩ
5V
1
2
V–
TC7135
UNDERRANGE
28
REF IN
27
OVERRANGE
3 ANALOG
26
STROBE
COMMON
Analog GND
4
25
RUN/HOLD
INT OUT
1 µF
24
0.47 µF
5
DIGTAL GND
AZ IN
23
6
BUFF OUT POLARITY
22
100 kΩ
7
CLOCK IN
C
REF
Signal
21
1 µF 8
100 kΩ
BUSY
Input
C
REF
+
20
9
–INPUT
(LSD) D1
19
0.1 µF
10
D2
+INPUT
18
11
D3
+5V
V+
17
12
D5 (MSD)
D4
16
13
B1 (LSB)
(MSB) B8
15
14
B2
B4
Clock Input
120 kHz
©
2007 Microchip Technology Inc.
DS21460D-page 1

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