ADC0831BIP [TI]
1-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP8, 0.300 INCH, PLASTIC, DIP-8;
| 型号： | ADC0831BIP |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 1-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP8, 0.300 INCH, PLASTIC, DIP-8 光电二极管 转换器 |
| 文件： | 总9页 (文件大小：149K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ADC0831A, ADC0832A, ADC0831B, ADC0832B
A/D PERIPHERALS WITH SERIAL CONTROL
SLAS006 – AUGUST 1985 – REVISED JUNE 1986
ADC0831 . . . P PACKAGE
(TOP VIEW)
8-Bit Resolution
Easy Microprocessor interface or
Stand-Alone Operation
CS
IN+
IN–
V
CC
CLK
DO
REF
1
2
3
4
8
7
6
5
Operates Ratiometrically or With 5-V
Reference
Single Channel or Multiplexed Twin
Channels With Single-Ended or Differential
Input Options
GND
ADC0832 . . . P PACKAGE
(TOP VIEW)
Input Range 0 to 5 V With Single 5-V Supply
Inputs and Outputs Are Compatible With
TTL and MOS
CS
CH0
CH1
GND
V
/REF
CC
1
2
3
4
8
7
6
5
Conversion Time of 32 µs at CLK = 250 kHz
CLK
DO
DI
Designed to Be interchangeable With
National Semiconductor ADC0831 and
ADC0832
TOTAL UNADJUSTED ERROR
DEVICE
A-SUFFIX
± 1 LSB
B-SUFFIX
± 1/2 LSB
± 1/2 LSB
ADC0831
ADC0832
± 1 LSB
description
These devices are 8-bit successive-approximation analog-to-digital converters. The ADC0831A and
ADC0831B have single input channels; the ADC0832A and ADC0832B have multiplexed twin input channels.
Theserialoutputisconfiguredtointerfacewithstandardshiftregistersormicroprocessors. Detailedinformation
on interfacing to most popular microprocessors is readily available from the factory.
The ADC0832 multiplexer is software configured for single-ended or differential inputs. The differential analog
voltage input allows for common-mode rejection or offset of the analog zero input voltage value. In addition,
the voltage reference input can be adjusted to allow encoding any smaller analog voltage span to the full 8 bits
of resolution.
The operation of the ADC0831 and ADC0832 devices is very similar to the more complex ADC0834 and
ADC0838 devices. Ratiometric conversion can be attained by setting the REF input equal to the maximum
analog input signal value, which gives the highest possible conversion resolution. Typically, REF is set equal
to V
(done internally on the ADC0832). For more detail on the operation of the ADC0831 and ADC0832
CC
devices, refer to the ADC0834/A DC0838 data sheet.
The ADC0831AC, ADC0831BC, ADC0832AC, and ADC0832BC are characterized for operation from 0°C
to 70°C. The ADC0831AI, ADC0831BI, ADC0832AI, and ADC0832BI are characterized for operation from
–40°C to 85°C.
Copyright 1996, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
ADC0831A, ADC0832A, ADC0831B, ADC0832B
A/D PERIPHERALS WITH SERIAL CONTROL
SLAS006 – AUGUST 1985 – REVISED JUNE 1986
functional block diagram
7
Start
CLK
Flip-Flop
1
CS
CLK
Shift Register
5
Odd/Even
DI
D
S
R
(ADC0832
Only)
Start
CLK
To Internal
Circuits
CLK
Single/Differential
Comparator
S
R
CH0/IN+
CH1/IN–
Analog
Mux
Time
Delay
EN
1
CS
CS
R
CS
CS
1
R
CLK
1
1
CS
1
EN
R
EN
CLK
6
SAR
Logic
and
DO
5
Ladder
and
Decoder
EOC
REF
9-Bit
Shift
Register
Bits 0–7
Bits 0–7
D
(ADC0831
Only)
Bit 1
LSB
Latch
MSB
First
First
One
Shot
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
ADC0831A, ADC0832A, ADC0831B, ADC0832B
A/D PERIPHERALS WITH SERIAL CONTROL
SLAS006 – AUGUST 1985 – REVISED JUNE 1986
sequence of operation
ADC0831
1
2
3
4
5
6
7
8
9
10
CLK
t
su
t
conv
CS
MSB-First Data
MUX
Settling Time
Hi-Z
HI-Z
DO
MSB
7
LSB
0
6
5
4
3
2
1
ADC0832
1
2
3
4
5
6
10
11
12
13
14
18
19
20
21
CLK
CS
t
conv
t
su
Start
Bit
+Sign
Odd
SGL
DI
(ADC0832
only)
Don’t Care
Dif Even
MUX
MSB-First Data
LSB-First Data
Settling Time
Hi-Z
MSB
7
LSB
0
MSB
DO
6
2
1
1
2
6
7
ADC0832 MUX ADDRESS CONTROL LOGIC TABLE
MUX ADDRESS
ODD/EVEN
CHANNEL NUMBER
0
1
SGL/DIF
+
–
+
–
+
L
L
L
H
L
H
H
+
H
H = high level, L = low level,
– or + = polarity of selected input pin
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
ADC0831A, ADC0832A, ADC0831B, ADC0832B
A/D PERIPHERALS WITH SERIAL CONTROL
SLAS006 – AUGUST 1985 – REVISED JUNE 1986
absolute maximum ratings over recommended operating free-air temperature range (unless
otherwise noted)
Supply voltage, V
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5 V
CC
Input voltage range: Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 15 V
Analog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to V + 0.3
CC
Input current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±5 mA
Total input current for package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Operating free-air temperature range: C-suffix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
I-suffix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to 85°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
NOTE 1: All voltage values, except differential voltages, are with respect to the network ground terminal.
recommended operating conditions
MIN NOM
MAX
UNIT
V
V
V
V
Supply voltage
4.5
2
5
6.3
CC
High-level input voltage
Low-level input voltage
Clock frequency
V
IH
0.8
400
60
V
IL
f
10
40
kHz
%
clock
Clock duty cycle (see Note 2)
Pulse duration, CS high
t
220
ns
wH(C
S)
t
Setup time, CS low or ADC0832 data valid before CLK↑
Hold time, ADC0832 data valid after CLK↑
350
90
ns
ns
su
h
t
C-suffix
Operating free-air temperature
I-suffix
0
70
85
T
A
°C
–40
NOTE 2: The clock duty cycle range ensures proper operation at all clock frequencies. If a clock frequency is used outside the recommended
duty cycle range, the minimum pulse duration (high or low) is 1 µs.
electrical characteristics over recommended range of operating free-air temperature, V
clock
= 5 V,
CC
f
= 250 kHz (unless otherwise noted)
digital section
C SUFFIX
I SUFFIX
PARAMETER
TEST CONDITIONS
UNIT
‡
TYP
‡
TYP
MIN
2.8
MAX
MIN
2.4
4.5
0.4
MAX
V
V
V
V
V
V
V
V
V
= 4.75 V,
= 4.75 V,
= 4.75 V,
I
I
I
= –360 µA
= –10 µA
= 1.6 mA
CC
CC
CC
OH
OH
OL
V
V
High-level output voltage
V
OH
4.6
Low-levl output voltage
0.34
V
OL
I
I
I
I
High-level input current
= 5 V
= 0
0.005
–0.005
–14
16
1
0.005
–0.005
–14
16
1
µA
µA
mA
mA
IH
IH
IL
Low-level input current
–1
–1
IL
High-level output (source) current
Low-level output (sink) current
V
T
A
= 25°C
= 25°C
= 25°C
= 25°C
–6.5
8
–6.5
8
OH
OL
OH = O,
= V
,
T
A
OL
CC
= 5 V,
= 0,
T
A
0.01
–0.01
5
3
0.01
–0.01
5
3
High-impedance-state output
current (DO)
O
O
I
µA
OZ
T
A
–3
–3
C
C
Input capacitance
Output capacitance
pF
pF
i
5
5
o
†
‡
All parameters are measured under open-loop conditions with zero common-mode input voltage.
All typical values are at V = 5 V, T = 25°C.
CC
A
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
ADC0831A, ADC0832A, ADC0831B, ADC0832B
A/D PERIPHERALS WITH SERIAL CONTROL
SLAS006 – AUGUST 1985 – REVISED JUNE 1986
electrical characteristics over recommended range of operating free-air temperature,
V
= 5 V, f
= 250 kHz (unless otherwise noted)
CC
clock
analog and converter section
†
‡
TYP
PARAMETER
Common-mode input voltage range
TEST CONDITIONS
MIN
MAX
UNIT
–0.05
to
V
ICR
See Note 3
V
V
CC
+0.05
On-channel
Off-channel
On-channel
Off-channel
V = 5 V
1
I
V = 0
I
–1
–1
1
I
Standby input current (see Note 4)
Input resistance to reference ladder
µA
kΩ
I(stdby)
V = 0
I
V = 5 V
I
r
1.3
2.4
5.9
i(REF)
total device
†
‡
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
2.5
UNIT
ADC0831
ADC0832
1
3
I
Supply current
mA
CC
5.2
†
‡
All parameters are measured under open-loop conditions with zero common-mode input voltage.
All typical values are at V
= 5 V, T = 25°C.
CC
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 V .Care must be taken during testing
A
CC
levels (4.5 V) because high-level analog input voltage (5 V) can, especially at high temperatures, cause this input diode
at low V
CC
to conduct and cause errors for analog inputs that are near full-scale. As long as the analog voltage does not exceed the supply
voltagebymorethan50mV, theoutputcodewillbecorrect. Toachieveanabsolute0Vto5Vinputvoltagerangerequiresaminimum
V
CC
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.
operatingcharacteristicsV =REF=5V,f
CC
=250kHz,t =t =20ns,T =25°C(unlessotherwise
clock
r
f
A
noted)
AI, AC SUFFIX
BI, BC SUFFIX
PARAMETER
Supply-voltage variation error
Total unadjusted error (see Note 5)
Common-mode error
TEST CONDITIONS§
UNIT
LSB
LSB
LSB
MIN
TYP
MAX
MIN
TYP
MAX
V
= 4.75 V to 5.25 V
= 5 V,
±1/16
±1/4
±1/16
±1/4
CC
V
T
ref
±1
±1/2
= MIN to MAX
A
Differential mode
±1/16
±1/4
±1/16
±1/4
Propagation delay time,
ouput data after CLK↑
(see Note 6)
MSB-first data
LSB-first data
650
1500
650
1500
t
C
= 100 pF
ns
ns
pd
L
250
125
600
250
125
600
C
C
= 10 pF, R = 10 kΩ
250
500
250
500
Output disable time,
DO after CS↑
L
L
L
t
t
dis
= 100 pF, R = 2 kΩ
L
Conversion time (multiplexer addressing
time not included)
clock
periods
8
8
conv
§
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.
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
ADC0831A, ADC0832A, ADC0831B, ADC0832B
A/D PERIPHERALS WITH SERIAL CONTROL
SLAS006 – AUGUST 1985 – REVISED JUNE 1986
PARAMETER MEASUREMENT INFORMATION
V
CC
GND
CLK
CS
50%
50%
t
su
t
su
V
CC
V
CC
CLK
DO
50%
0.4 V
2 V
GND
GND
t
t
t
h
h
pd
V
V
OH
V
CC
2 V
50%
DI
OL
0.4 V
0.4 V
GND
Figure 1. ADC0832 Data Input Timing
Figure 2. Data Output Timing
V
CC
Test
Point
S1
S2
R
L
From Output
Under Test
C
L
(see Note A)
LOAD CIRCUIT
t
r
t
r
V
V
CC
CC
90%
90%
10%
50%
CS
CS
50%
10%
GND
GND
t
t
dis
dis
V
CC
–V
CC
S1 open
S2 closed
90%
S1 open
S2 closed
DO and SARS
Output
DO and SARS
Output
10%
GND
GND
VOLTAGE WAVEFORMS
NOTE A: C includes probe and jig capacitance.
VOLTAGE WAVEFORMS
L
Figure 3. Output Disable Time Test Circuit and Voltage Waveforms
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
ADC0831A, ADC0832A, ADC0831B, ADC0832B
A/D PERIPHERALS WITH SERIAL CONTROL
SLAS006 – AUGUST 1985 – REVISED JUNE 1986
TYPICAL CHARACTERISTICS
LINEARITY ERROR
vs
UNADJUSTED OFFSET ERROR
vs
REFERENCE VOLTAGE
REFERENCE VOLTAGE
1.5
16
14
V
= 5 V
= 250 kHz
= 25°C
V
I+
= V = 0 V
I–
CC
f
T
clock
A
1.25
12
1.0
10
8
0.75
6
4
0.5
0.25
2
0
0
0.01
0.1
1.0
10
0
1
2
3
4
5
V
ref –
Reference Voltage – V
V
ref
– Reference Voltage – V
Figure 5
Figure 4
LINEARITY ERROR
vs
LINEARITY ERROR
vs
CLOCK FREQUENCY
FREE-AIR TEMPERATURE
0.5
3
V
CC
= 5 V
= 5 V
ref
V
clock
= 5 V
ref
V
f
= 250 kHz
2.5
0.45
2
0.4
1.5
85°C
0.35
1
25°C
0.3
–40°C
0.5
0.25
0
0
100
f
200
300
400
500
600
–50
–25
0
25
50
75
100
– Clock Frequency – kHz
T
A
– Free-Air Tempertature – °C
clock
Figure 6
Figure 7
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
ADC0831A, ADC0832A, ADC0831B, ADC0832B
A/D PERIPHERALS WITH SERIAL CONTROL
SLAS006 – AUGUST 1985 – REVISED JUNE 1986
ADC0831
SUPPLY CURRENT
vs
ADC0831
SUPPLY CURRENT
vs
FREE-AIR TEMPERATURE
CLOCK FREQUENCY
1.5
1.5
f
= 250 kHz
clock
CS = High
V
T
A
= 5 V
= 25°C
CC
V
= 5.5 V
= 5 V
CC
1
V
CC
1
0.5
V
CC
= 4.5 V
0.5
–50
0
–25
0
25
50
75
100
0
100
200
300
400
500
T
A
– Free-Air Temperature — °C
f
– Clock Frequency – kHz
clock
Figure 8
Figure 9
OUTPUT CURRENT
vs
FREE-AIR TEMPERATURE
25
V
CC
= 5 V
20
15
10
5
I
(V = 5 V)
OL OL
–I = 0 V)
(V
OH OH
–I = 2.4 V)
(V
OH OH
I
(V
= 0.4 V)
0
OL OL
0
–50
–25
25
50
75
100
T
A
– Free-Air Temperature – °C
Figure 10
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
IMPORTANT NOTICE
Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF
DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO
BE FULLY AT THE CUSTOMER’S RISK.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
semiconductor products or services might be or are used. TI’s publication of information regarding any third
party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright 1998, Texas Instruments Incorporated
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