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TC3405

16-Bit, Low Cost, Low Power Sigma-Delta A/D Converter

Microchip Technology 

TC3405

TC3405 DC ELECTRICAL SPECIFICATIONS (CONTINUED)

Electrical Characteristics: TA = 25°C and VDD = 2.7V, unless otherwise specified. Boldface type specifications apply for

temperatures of 0°C to 85°C. VREF = 1.25V, Internal Clock Frequency = 520kHz.

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

SCLK, A0 A1, ENABLE

VIL

Input Low Voltage

—

VIH

ILEAK

Input High Voltage

Leakage Current

SDAT, RESET

0.7 x VDD

—

VOL

VOH

VDDMIN

Output Low Voltage

Output High Voltage (SDAT)

Minimum VDD for PFO, RESET Valid

—

0.9 x VDD

—

VTH, PFI

VCCPFI

PFI Input Voltage Range

0

VTH, PFI Input Current

-0.1

VTHR

Threshold (VTH, PFI)

—

Threshold Hysteresis

—

Threshold Tempco

—

Note 1: Differential input voltage defined as (VIN+ – VIN-).

2: Resistance from INn+ to INn- or INn to GND.

3: @ VDD = 1.8V, ISOURCE ≤ 200µA.

—

—

1

—

—

1.1

—

.01

1.23

30

30

0.3 x

V

VDD

—

V

—

µA

0.4

V

IOL = 1.5mA

—

V

ISOURCE = 400µA (Note 3)

1.3

µA

VDD

V

0.1

µA

—

V

—

mV

—

ppm/°C

TC3405 AC ELECTRICAL SPECIFICATIONS

Electrical Characteristics: TA = 25°C and VDD = 2.7V, unless otherwise specified. Boldface type specifications apply for

temperatures of 0°C to 85°C. VREF = 1.25V, Internal Clock Frequency = 520kHz.

Symbol

Parameter

Min

Typ

Max Unit

Test Conditions

t1

Resolution Reduction Clock Width

1

—

—

µsec Width of SCLK (Negative)

t2

Resolution Reduction Clock Width

1

—

—

µsec Width of SCLK (Positive)

t3

Conversion Time (15-bit Plus Sign) —

125

—

msec 16-bit Conversion, TA = 25°C (Note 1)

Conversion Time (14-bit Plus Sign) —

t3/2.0

—

msec 15-bit Conversion

Conversion Time (13-bit Plus Sign) —

t3/4.0

—

msec 14-bit Conversion

Conversion Time (12-bit Plus Sign) —

t3/7.8

—

msec 13-bit Conversion

Conversion Time (11-bit Plus Sign) —

t3/15.1

—

msec 12-bit Conversion

Conversion Time (10-bit Plus Sign) —

t3/28.6

—

msec 11-bit Conversion

Conversion Time (9-bit Plus Sign)

—

t3/51.4

—

msec 10-bit Conversion

t4

Resolution Reduction Window

—

t3/85.7

—

msec Width of SCLK

t5

SCLK to Data Valid

1000

—

—

nsec SCLK Falling Edge to SDAT Valid

t6

Address Setup

0

—

—

nsec Address Valid to SCLK

t7

Address Hold

1000

—

—

nsec SCLK to Address Valid Hold

t8

Acknowledge Delay

—

—

1000 nsec SCLK to SDAT Delay

t9

RESET Active Time-out Period

—

t3*2

—

msec Delay from POR or Brown-out

Recovery to RESET = VOH

t11

RESET Delay

5

—

64

µsec Delay VTH Falling at 10V/msec to

RESET Low

Note 1: Nominal temperature drift is -2830ppm/C° for temperature less than 25°C and -1340ppm/°C for temperatures

greater than 25°C.

DS21414B-page 4

© 2002 Microchip Technology Inc.

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