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TC7109

12-Bit μA-Compatible Analog-to-Digital Converters

Microchip Technology 

TC7109/A

TC7109/TC7109A ELECTRICAL SPECIFICATIONS (Continued)

Electrical Characteristics: All parameters with V+ = +5V, V- = -5V, GND = 0V, TA = +25°C, unless otherwise indicated.

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

TCFS Scale Factor Temperature Coefficient

I+

Supply Current (V+ to GND)

IS

VREF

Supply Current (V+ to V-)

Reference Out Voltage

TCREF Ref Out Temperature Coefficient

Digital

VOH

Output High Voltage

IOUT = 700μA

VOL

Output Low Voltage

Output Leakage Current

Control I/O Pull-up Current

—

1

5

—

700

1500

—

700

1500

-2.4

-2.8

-3.2

—

80

—

3.5

4.3

—

—

0.2

0.4

—

±0.01

±1

—

5

—

μV/°C

μA

μA

V

ppm/°C

V

μA

μA

μF

VIN = 408.9mV = >77708

Reading, Ext Ref = 0ppm/°C

VIN = 0V, Crystal Oscillator

3.58MHz Test Circuit

Pins 2-21, 25, 26, 27, 29 Open

Referenced to V+, 25kΩ

Between V+ and Ref Out

25kΩ Between V+ and Ref Out

0°C ≤ TA ≤ +70°C

TC7109: IOUT = 100μA

Pins 3 -16, 18, 19, 20

TC7109A: IOUT = 700μA

IOUT = 1.6mA

Pins 3 -16 High-Impedance

Pins 18, 19, 20 VOUT = V+ – 3V

Mode Input at GND

Control I/O Loading

—

—

50

pF

HBEN, Pin 19; LBEN, Pin 18

VIH

VIL

tW

Note

Input High Voltage

2.5

—

—

V

Pins 18 -21, 26, 27

Referenced to GND

Input Low Voltage

—

—

1

V

Pins 18-21, 26, 27

Referenced to GND

Input Pull-up Current

Input Pull-down Current

—

5

—

—

25

—

—

1

—

μA

Pins 26, 27; VOUT = V+ – 3V

μA

Pins 17, 24; VOUT = V+ – 3V

μA

Pins 21, VOUT = GND = +3V

Oscillator Output Current, High

—

1

—

mA

VOUT – 2.5V

Oscillator Output Current, Low

—

1.5

—

mA

VOUT – 2.5V

Buffered Oscillator Output Current High —

2

—

mA

VOUT – 2.5V

Buffered Oscillator Output Current Low

—

5

—

mA

VOUT – 2.5V

Mode Input Pulse Width

60

—

—

nsec

1: Input voltages may exceed supply voltages if input current is limited to ±100μA.

2: Connecting any digital inputs or outputs to voltages greater than V+ or less than GND may cause destructive device

latch-up. Therefore, it is recommended that inputs from sources other than the same power supply should not be applied

to the TC7109A before its power supply is established. In multiple supply systems, the supply to the device should be

activated first.

3: This limit refers to that of the package and will not occur during normal operation.

HANDLING PRECAUTIONS: These devices are CMOS and must be handled correctly to prevent damage. Package

and store only in conductive foam, antistatic tubes, or other conducting material. Use proper antistatic handling pro-

cedures. Do not connect in circuits under “power-on” conditions, as high transients may cause permanent damage.

© 2006 Microchip Technology Inc.

DS21456C-page 5

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