ADC0831A, ADC0832A, ADC0831B, ADC0832B

A/D PERIPHERALS WITH SERIAL CONTROL

SLAS006 – AUGUST 1985 – REVISED JUNE 1986

5

POST OFFICE BOX 655303

POST OFFICE BOX 1443

electrical

characteristics

over

recommended

range

of

operating

free-air

temperature,

analog and converter section

PARAMETER

TEST CONDITIONS†

MIN

TYP‡

MAX

UNIT

VICR

Common-mode input voltage range

See Note 3

– 0.05

to

VCC+ 0.05

V

On-channel

VI = 5 V

1

II( tdb )

Standby input current (see Note 4)

Off-channel

VI = 0

–1

µA

II(stdby)

Standby input current (see Note 4)

On-channel

VI = 0

–1

µA

Off-channel

VI = 5 V

1

ri(REF)

Input resistance to reference ladder

1.3

2.4

5.9

k

Ω

total device

PARAMETER

TEST CONDITIONS†

MIN

TYP‡

MAX

UNIT

ICC

Supply current

ADC0831

1

2.5

mA

ICC

Supply current

ADC0832

3

5.2

mA

† All parameters are measured under open-loop conditions with zero common-mode input voltage.

‡ All typical values are at VCC = 5 V, TA = 25°C.

NOTES:

3. If channel IN– is more positive than channel IN+, the digital output code will be 0000 0000. Connected to each analog input are two

on-chip diodes that conduct forward current for analog input voltages one diode drop above VCC .Care must be taken during testing

at low VCC levels (4.5 V) because high-level analog input voltage (5 V) can, especially at high temperatures, cause this input diode

to conduct and cause errors for analog inputs that are near full-scale. As long as the analog voltage does not exceed the supply

voltage by more than 50 mV, the output code will be correct. To achieve an absolute 0 V to 5 V input voltage range requires a minimum

VCC of 4.95 V for all variations of temperature and load.

4. Standby input currents are currents going into or out of the on or off channels when the A/D converter is not performing conversion

and the clock is in a high or low steady-state condition.

noted)

PARAMETER

TEST CONDITIONS§

AI, AC SUFFIX

BI, BC SUFFIX

UNIT

PARAMETER

TEST CONDITIONS§

MIN

TYP

MAX

MIN

TYP

MAX

UNIT

Supply-voltage variation error

VCC = 4.75 V to 5.25 V

±1/16

±1/4

±1/16

±1/4

LSB

Total unadjusted error (see Note 5)

Vref = 5 V,

TA = MIN to MAX

±1

±1/2

LSB

Common-mode error

Differential mode

±1/16

±1/4

±1/16

±1/4

LSB

t d

Propagation delay time,

ouput data after CLK

↑

MSB-first data

CL = 100 pF

650

1500

650

1500

ns

tpd

ouput data after CLK

↑

(see Note 6)

LSB-first data

CL = 100 pF

250

600

250

600

ns

tdi

Output disable time,

CL = 10 pF, RL = 10 kΩ

125

250

125

250

ns

tdis

,

DO after CS

↑

CL = 100 pF, RL = 2 kΩ

500

500

ns

tconv

Conversion time (multiplexer addressing

time not included)

8

8

clock

periods

§ All parameters are measured under open-loop conditions with zero common-mode input voltage. For conditions shown as MIN or MAX, use the

appropriate value specified under recommended operating conditions.

NOTES:5. Total unadjusted error includes offset, full-scale, linearity, and multiplexer errors.

6. The most significant-bit-first data is output directly from the comparator and therefore requires additional delay to allow for comparator response

time. Least-significant-bit-first data applies only to ADC0832.