ES51999 [CYRUSTEK]

4 3/4 and 5 3/4 A/D AUTO; 4 3/4和3/4 5 A / D AUTO
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MAX34334CSE前5页PDF页面详情预览
ES51999
4 3/4 and 5 3/4 A/D AUTO
Features
External crystal oscillator
4MHz: count up to 44,000 counts
(input range: ±440mV)
10MHz: count up to 440,000 counts
(input range: ±440mV)
Four selectable conversion rates:
20, 10, 5, 2 conversion/sec
On chip resistance switches for range
Changing.
Voltage (DC/AC), current(DC/AC), resistor,
diode, frequency and duty cycle measurement
400mV independent input
on chip OP amp’ for AC/DC conversion
Auto zeroing function
X10 function
I/O port for microprocessor
400MHz Frequency counter and 1MHz duty
cycle measurement
On chip buzzer driving: 2KHz
Single 5V DC power supply (V+ to V-)
Low battery detection
SLEEP mode
64-pin QFP
Description
The ES51999 is a 44,000/440,000-count
dual-slope analog-to-digital converter
(ADC) with X10 functions. The
ES51999 also include frequency and
duty cycle measurement. The conversion
rate
and
resolution
can
be
selected/decided
by
external
microprocessor. In additional, other
functions are also provided for low
battery detection, on chip buzzer driving,
and I/O port with microprocessor.
1
07/07/06
ES51999
4 3/4 and 5 3/4 A/D AUTO
Absolute Maximum Ratings
Characteristic
Positive Supply Voltage
(V+ to AGND)
Negative Supply Voltage
(V- to AGND)
Analog I/O Voltage
Digital I/O Voltage
Power Dissipation
Operating Temperature
Storage Temperature
Lead Temperature
(soldering, 10sec)
Rating
3.5V
-3.5V
((V-) - 0.5V) to ((V+) + 0.5V)
((V-) - 0.5V) to ((V+) + 0.5V)
800mW
0°C to 70°C
-25°C to 125°C
270°C
Electrical Characteristics
TA=25°C, DGND=AGND=0V
Symbol Parameter
Test Condition
V+
V-
I(V+)
I(GND)
Zero
NLV1
REV1
NLV10
REV10
V12
LBATT
TCRF
Positive Power Supply
Negative Power Supply
Operation
Supply Current
Supply Current of DGND
to V-
Zero Input Reading
Nonlinearity (Voltage x1)
Rollover Error
(Voltage x1)
Nonlinearity
(Voltage x10)
Rollover Error
(Voltage x10)
Band Gap Voltage
Reference
Low Battery Detection
Reference Voltage (V12)
Temperature Coefficient
Normal power on (V+ to V-)
∆V
between DGND and V- is -
0.2V
1 MΩ input resistor, null to zero
by uP.
Best case straight line
1 MΩ input resistor
Best case straight line
1 MΩ input resistor
100 kΩ between V12 and AGND
LBATT to V12
100 kΩ between V12 and AGND
(0°C to 70°C)
Min.
2.3
-2.3
-
5
-0
-0.01
-0.01
-0.1
-0.1
-1.31
-60
-
Typ. Max. Unit
2.5
-2.5
1.0
10
0
-
-
-
-
-1.23
0
50
2.7
-2.7
1.7
-
+0
0.01
0.01
0.1
0.1
-1.10
60
-
V
V
mA
mA
count
%F.S.
%F.S.
%F.S.
%F.S.
V
mV
ppm/°C
2
07/07/06
ES51999
4 3/4 and 5 3/4 A/D AUTO
Pin configuration
QFP-64pin
L
B
A
T VV
T + +
A
G
N
D
A
G
N
D
60
O
S
D
C
G
N V V4
D- - M
S
C
L
K
S
T
A
TVE
UC O
S C C
55
50
CAZ
RAZ
BUF
BUFX10
Cref-
Cref+
NC
IVSH
IVSL
TEST5
ACVL
ACVH
ADI
ADO
NC
OVX
OVH
NC
1
CINT
5
45
10
40
15
35
20
25
30
OSC2
OSC1
BUZOUT
BUZIN
NC
FREQ
NC
NC
NC
NC
NC
NC
NC
VR
VRH
NC
NC
NC
NC
Pin Description
Pin No.
Symbol
1
CAZ
2
RAZ
3
CINT
4
BUF
5
BUFX10
6
Cref-
7
Cref+
9
IVSH
10
IVSL
11
TEST5
12
ACVL
13
ACVH
14
ADI
15
ADO
Continued on next page
O
O
O
O
O
I/O
I/O
I
I
I/O
O
O
I
O
O O V V V V N S N V N VN
VR R R R R C G C R C 4 C
S 1 5 4 3 2
N 1
0
0
G
D
m
Type Description
Auto-zero capacitor connection
Auto-zero resistance connection
Integration capacitor connection
Integration resistor connection output
Integration resistor connection output
Negative connection for reference capacitor
Positive connection for reference capacito
High current measurement input
Low current measurement input
Test Pin
Negative output of AC to DC converter
Positive output of AC to DC converter.
Negative input of internal AC to DC OpAmp
Output of internal AC to DC OpAmp.
ES51999
3
07/07/06
ES51999
4 3/4 and 5 3/4 A/D AUTO
Pin No.
17
18
20
21
22
23
24
25
27
29
31
37
38
46
48
49
50
51
52
53
54
55
56
57
58
59
Symbol
OVX
OVH
OVSG
OR1
VR5
VR4
VR3
VR2
SGND
VR1
V400m
VRH
VR
FREQ
BUZIN
BUZOUT
OSC1
OSC2
EOC
VCC
STATUS
SCLK
OSC4M
V-
V-
DGND
Type Description
I
I
I
O
O
O
O
O
G
I
I
O
O
I
I
O
I
O
O
I
I/O
I
I
P
P
G
Input high voltage for resistance measurement.
Output connection for resistance measurement.
Sense low voltage for resistance measurement.
Reference resistor connection for 399.9Ω range.
Voltage measurement
÷
10000 attenuator (4000V.)
Voltage measurement
÷
1000 attenuator (400.0V.)
Voltage measurement
÷
100 attenuator (40.00V.)
Voltage measurement
÷
10 attenuator (4.000V.)
Signal Ground.
Measurement input.
400mV independent input.
Output of band-gap voltage reference. Typically -1.2V
Reference input voltage connection. Typically -200mV
Frequency counter input, offset to V-/2
Enables the buzzer. Low action.
Outputs a 2KHz audio frequency signal for driving piezoelectric buzzer
when BUZIN is low.
Crystal oscillator input connection.
Crystal oscillator output connection.
End of conversion indicator
The high level of digital I/O signals, which is connected to VCC pin of
microprocessor.
ES51966 sends current status to microprocessor or receives controlled
status from microprocessor.
Clock input from microprocessor.
Crystal oscillator selection. NC for 4MHz; connect to V- for 10MHz.
Negative supply voltage, connected to cathode of battery typically..
Negative supply voltage, connected to cathode of battery typically.
Digital Ground ( Output of on-chip DC-DC converter ),
V
DGND
= ( V+ - V- ) / 2
Analog Ground
Analog Ground
Positive supply voltage
Positive supply voltage
Low battery voltage detection
60
AGND
G
61
AGND
G
62
V+
P
63
V+
P
64
LBATT
I
Pin No. :
8 , 16 , 19 , 26 , 28 , 30 , 32-36 , No connected
39-45 , 47
P: Power,
G: Ground,
I: Input,
O: Output
4
07/07/06
ES51999
4 3/4 and 5 3/4 A/D AUTO
Operation `Mode
(1) Digital Interface between ES51999 and Microprocessor
The EOC, SCLK and STATUS of the ES51999 are used as digital communicating
interface between ES51999 and microprocessor. The STATUS pin is bi-directional, and
the others are unilateral: EOC is from ES51999 to microprocessor and SCLK is from
microprocessor to ES51999. The timing and data of the communication are as follows:
mode 1:
ES51999 receives controlled status from microprocessor.
Force A/D entering into AZ phase
t
1
t
6
t
7
SCLK(I)
t
2
START
t
3
t
4
t
5
t
5
END
t
8
E
t
9
D
F
(VCC)
(V-)
STATUS(I/O)
A
B C
status
(VCC)
(V-)
Timing of the above figure:
t
1
(1040 ~ 4096)
T
t
2
512
T
t
3
(4 ~ 256)
T
t
4
> 4
T
t
5
(16 ~ 1024)
T
(T = 0.25µs)
t
6
t
7
t
8
t
9
(32 ~ 512)
T
(520 ~ 1020)
T
(0 ~ 256)
T
520
T
Note: 1. At START:
After time A, ES51999 enter into AZ phase. And at the same time, STATUS is
changed from output pin to input pin with a 3uA pull low current provided by
ES51999 internally. Then microprocessor can send control status to STATUS. It
is suggested that micro-processor begins to drive STATUS between B and C.
2. At END:
The microprocessor stopped driving STATUS between D and E, and ES51999
will begin to drive STATUS after F.
5
07/07/06