ES51911_11 [CYRUSTEK]
11,000 Counts Auto DMM; 11000自动计数数字万用表
| 型号： | ES51911_11 |
| 厂家： | 
Cyrustek corporation |
| 描述： | 11,000 Counts Auto DMM |
| 文件： | 总29页 (文件大小：670K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ES51911
11,000 Counts Auto DMM
• Band-gap reference voltage output
• High crest factor signal detection
(Taiwan patent no.: 234661)
• CE selection
Features
• 11,000 counts LCD display
• Conversion rate : 4 times/s
• Full automatic measurement
*Voltage measurement:
110.00mV – 1000.0V
• On-chip independent OPAMP
• Serial data output (RS232 format)
• LCD segment check when power on
• Auto power off with idle time selection
• Sleep output
*Current measurement: μA/mA/A
*Resistance measurement:
110.00Ω – 110.0MΩ
• Re-power on
*Capacitance measurement:
• On-chip buzzer driver
11.000nF – 110.00mF(12.5sec)
(Taiwan patent no.: 453443)
• 3V DC power supply
*Frequency counter:
• Low battery detection for 3V or 9V battery
• Back light function
1.1000KHz – 110.00MHz
• Current modes for clamp meter
• Diode measurement
Description
ES51911 is an integrated analog-to-digital
converter (ADC) with 11,000 counts LCD
display, automatic range selection, and 3V DC
power supply. Automatic range selection is
provided for voltage (AC/DC) measurement,
resistance measurement, current measurement,
capacitance measurement, and frequency
counter. Expensive and bulky mechanical
range switches are not required. Other features
include relative value display, zero-offset
removing feature in manual DCA mode for
clampmeter, data holding, maximum and
minimum holding, diode measurement,
temperature measurement, continuity checking,
low battery detection, auto power off, re-power
on, and RS232 data output.
• Continuity check
• ADP mode with independent reference
voltage
• Temperature mode with internal scale
conversion circuit from 0C to 0F
• VAHZ function
(Taiwan patent no.: 510502)
• Relative function
• Zero function in manual DCA mode
• Data hold function
• MAX/MIN function
• SHIFT function
v1.2
1
11/09/06
Application
Digital multimeter
Clamp meter
Thermometer
Pin Assignment
50
45
40
35
NC
OSC1
OSC2
APOSEL
CESEL
BKLIT
KEY
SLACDC
FC5
SEG17
OHMC3
OHMC2
RS232
FREQ
SLEEP
OHMC1
CA+
CA-
R1K
R9K
NC
NC
VBAR
VR1
SGND
ADP
VA-
85
Cyrustek.
com.tw
FC4
FC3
FC2
FC1
90
LBAT9
SDO
C+
C-
V-
95
ES51911
DGND
AGND
AGND
VA+
100
v1.2
2
11/09/06
Pin Description
Pin No
Symbol
V+
Type
O
O
Description
Output of on-chip DC-DC converter.
Output of on-chip DC-DC converter.
1
2
3
4
5
6
7
8
V+
CREF+
CREF-
CINT
CAZ
BUFF
RAZ
I/O Positive connection for reference capacitor.
I/O Negative connection for reference capacitor.
O
I
O
O
Integrator output. Connect to integral capacitor
Auto-zero capacitor connection.
Buffer output pin. Connect to integral resistor
Buffer output pin in high-speed mode. Connect to high-speed integral
resistor.
9
IVSH
IVSL
OVX
OVH
OVSG
OR1
VR5
VR4
VR3
VR2
I
I
I
I
I
O
O
O
O
O
Current measurement input for 1100μA, 110mA and 11A modes.
Current measurement input for 110μA, 11mA.
Input high voltage for resistance measurement
Output connection for resistance measurement
Sense low voltage for resistance measurement
Reference resistor connection for 110.00Ω range
Voltage measurement ÷10000 attenuator(1000.0V)
Voltage measurement ÷1000 attenuator(110.00V)
Voltage measurement ÷100 attenuator(11.000V)
Voltage measurement ÷10 attenuator(1.1000V)
10
11
12
13
14
15
16
17
18
19
20
TEST 5
ACVL
I/O Test pin
O
DC signal low input in ACV/ACA mode. Connect to negative output
of external AC to DC converter.
21
ACVH
O
DC signal high input in ACV/ACA mode. Connect to positive output o
external AC to DC converter.
22
23
24
25
26
27
28
29
30
31
ADI
ADO
ADOHZ
OPO
OPIN+
OPIN-
PWD
VRH
I
O
I
O
I
I
I
O
I
I
Negative input of internal AC to DC OP Amp.
Output of internal AC to DC OP Amp.
Frequency input under voltage/current mode, offset to AGND.
Output of internal independent OP Amp.
Positive input terminal of on-chip independent OP Amp.
Negative input terminal of on-chip independent OP Amp.
Power-down enable for on-chip independent OP Amp.
Output of band-gap voltage reference. Typically –1.23V
Reference input voltage connection. Typically –100mV
For ADP mode. De-integrating voltage positive input. The input
should be higher than VA-.
VR
VA+
32
VA-
I
For ADP mode. De-integrating voltage negative input. The input
should be lower than VA+.
33
34
35
36
ADP
SGND
VR1
I
G
I
Measurement input in ADP mode.
Signal Ground.
Measurement input.
In capacitance mode, a compensation capacitor is connected.
In temperature mode, it is used to control decimal point.
In µA or mA modes, it is used to control the ‘µ’ or ‘m’ sign.
VBAR
I
37
38
39
40
41
42
43
NC
NC
R9K
R1K
CA-
O
O
Connect to a precise 9KΩ resister for capacitor measurement.
Connect to a precise 1KΩ resister for capacitor measurement.
I/O Negative auto-zero capacitor connection for capacitor measurement
I/O Positive auto-zero capacitor connection for capacitor measurement
O
CA+
OHMC1
Filter capacitor connection for resistance mode.
v1.2
3
11/09/06
44
45
46
47
48
49
50
SLEEP
FREQ
O
I
I
O
O
O
Sleep mode indicator, asserts low in SLEEP mode.
Frequency counter input, offset V-/2 internally by the chip.
Assert low to enable serial data output.
Filter capacitor connection for resistance mode.
Filter capacitor connection for resistance mode.
LCD segment line 17
RS232
OHMC2
OHMC3
SEG17
NC
51 - 66 SEG16 – SEG01
O
O
O
O
O
O
LCD segment line 01 – 16
LCD backplane 4
LCD backplane 3
LCD backplane 2
67
68
69
70
71
BP4
BP3
BP2
BP1
LCD backplane 1
ANNUNC
Square wave output at the backplane frequency, synchronized to
BP1. ANNUNC can be used to control display annunciator. Connect a
LCD segment to ANNUNC to turn it on; connect an LCD segment to
its backplane to turn it off.
72
73
BUZIN
BUZOUT
I
O
Pull to V- to enable the BUZOUT.
Outputs a 2KHz audio frequency signal for driving piezoelectric buzze
when BUZIN is low.
74
BKOUT
O
If BKLIT function is enabled, this pin will change from –3V to +3V
For 60 sec, once press BKLIT pin again within 60 sec, this pin will
Change back to –3V.
75
76
77
78
79
80
81
82
83
84
85
86
MAXMIN
VAHZ
NC
REL_ZERO
HOLD
RANGE
OSC1
OSC2
APOSEL
CESEL
BKLIT
KEY
I
I
Pulse to V- to enable MAX/MIN function.
Pulse to V- to enable VAHZ mode.
I
I
I
I
O
I
I
I
I
Pulse to V- to enable Relative function or Zero function.
Pulse to V- to enable HOLD function.
Pulse to V- to enable manual mode and manual range selection.
Crystal oscillator input connection
Crystal oscillator output connection
Idle time selection for auto power off feature.
CE selection feature control pin.
Back light function. Pulse low to set BKOUT pin output.
Pulse to V- to change mode. In ADP mode, if this pin is connected to
V-, the buzzer output will be off when the ADP input overflows.
Select initial state. Please refer to page 13
Switch 5 for function selection.
Switch 4 for function selection.
Switch 3 for function selection.
Switch 2 for function selection.
Switch 1 for function selection.
Low battery configuration. If 3V battery is used, connect it to AGND.
The default low-battery threshold voltage is –2.3V. If 9V battery is
Used, the low battery annunciator is displayed when the voltage of
this pin is less than VRH (-1.2V)
87
88
89
90
91
92
93
SLACDC
FC5
I
I
I
I
I
I
I
FC4
FC3
FC2
FC1
LBAT9
94
95
96
SDO
C+
C-
O
O
O
P
RS232 compliant serial data output.
Positive capacitor connection for on-chip DC-DC converter.
Negative capacitor connection for on-chip DC-DC converter.
Negative supply voltage. Connecting to 3V battery negative terminal.
97
V-
98
99
100
DGND
AGND
AGND
P/G Digital ground. Connecting to 3V battery positive terminal.
P/G Analog ground.
P/G Analog ground.
v1.2
4
11/09/06
Absolute Maximum Ratings
Characteristic
Supply Voltage (V- to AGND)
Analog Input Voltage
V+
Rating
-4V
V- -0.6 to V+ +0.6
V+ ≥ (AGND/DGND+0.5V)
AGND/DGND
AGND/DGND ≥ (V- -0.5V)
V- -0.6 to DGND +0.6
500mW
Digital Input
Power Dissipation. Flat Package
Operating Temperature
0℃ to 70℃
Storage Temperature
-25℃ to 125℃
Electrical Characteristics
TA=25℃, V- = -3V
Parameter
Power supply
Operating supply current
In DCV mode
Symbol
V-
IDD
Test Condition
Min.
-3.5
—
Typ.
-3.0
1.8
Max
-2.2
2.0
Units
V
mA
Normal operation
In sleep mode
ISS
2.5
—
5
µA
%F.S1
—
—
Voltage roll-over error
REV 10MΩ input resistor
±0.05
Best case straight
—
—
Voltage nonlinearity
NLV
line
±0.05
%F.S
Input Leakage
Low battery flag voltage
Zero input reading
-10
-2.4
1
-2.3
000
10
-2.2
+000
pA
V
counts
V- to AGND
10MΩ input resistor -000
100KΩ resistor
Reference voltage
VREF between VRH and
-1.33
-1.23
-1.13
V
AGND
Peak to peak backplane
drive voltage
Counter time base period
-3.5V≤ V ≤-2.2V
3.1
—
—
3.2
1
3.3
—
—
V
sec
V
fOSC = 4MHZ
Ω and Continuity
Mode
Open circuit voltage for 110Ω range
-3.0
Open circuit voltage for Ω
measurement (except 110Ω)
-0.38
—
-0.34
1.2
-0.30
—
V
Between V- pin and
HOLD, RANGE,
KEY, FC1~FC5,
BKLIT,MAXMIN
Between V- pin
and RS232
Internal pull-high to 0V
current
µA
—
—
11
Internal pull-low to V-
current
AC frequency response at 1.1000V
range
Between GND Pin
and PWN
±1%
1.5
µA
HZ
40-400
—
—
—
—
±5%
400-2000
Input from ADOHZ
Duty cycle=50%
Sensitivity in VAHZ mode
600
mV(Vpp)
v1.2
5
11/09/06
Input from FREQ
Duty cycle=50%
Sensitivity in Frequency mode
600
mV(Vpp)
100KΩ
Between
resister
VRH
Reference voltage temperature
coefficient
—
—
ppm/℃
TCRF
50
0℃<TA<70℃
1.5
15
1.0
10
1.0
5
%
Digits
%
Digits
%
Digits
%
Digits
11nF
110nF/1.1µF
11µF/110µF/1.1mF
11mF/110mF
Capacitance measurement accuracy2
1.5
5
Note:
1.Full Scale
2.Above specification from 11nF to 1.1uF ranges are specified under REL mode.
Function Description
1. Operating Modes
1.1 Voltage Measurement
A re-configurable voltage divider automatically provides a suitable range in voltage
measurement mode. The following table summarizes the full-scale ranges in each
configuration.
Configuration
VR1
Full Scale Range
110.00mV
1.1000V
Divider Ratio
1
Resister Connection
R1
VR2
VR3
VR4
VR5
1/10
1/100
1/1000
1/10000
R2 / (R1+R2)
R3 / (R1+R3)
R4 / (R1+R4)
R5 / (R1+R5)
11.000V
110.00V
1100.0V
Note: 110.00mV range only exists in manual mode.
1.1.2 CE selection
ES51911 has a CE selection feature archived by configuring an CESEL pin. If pin
CESEL is connected to DGND or floating, ES51911 will have a 610.0V overflow level
in DC and AC 1100.0V ranges. If pin CESEL is connected to V-, ES51911 will have a
1010.0V overflow level in DC and AC 1100.0V ranges. The meter will Show OL when
the measuring signal reaches the overflow level. The configuration of CESEL is listed
below.
CESEL
V-
DGND or floating
DCV
1010.0V
610.0V
ACV
1010.0V
610.0V
v1.2
6
11/09/06
1.1.3 HCF signal detection
ES51911 provides detection of high-crest-factor (HCF) signal in ACV mode. When this
function is enabled, ES51911 senses the signal and determines it as HCF if the Vpp is
large enough. Once the signal is determined as HCF, ES51911 will jump up one
measuring range regardless of current measurement value. It takes 60ms to jump one
range up. The jumping up process will continue until the maximum range is reached.
With HCF detection, a more accurate result could be obtained. For example, when a
input signal with Vpp=500V, Vrms=100V(CF=5) was applied, traditional 4000 counts
DMMs might stay at 400V range but shows counts with the amount of error up to 10%
or even bigger. The error rises from limited input/output swing at internal ADC. With
HCF detection, DMM will stay at 4000V and exhibits more accurate results.
In addition to accuracy improvement, HCF will speed up the measuring process for
high voltage signals. For example, a 1000Vrms is applied, ES51911 will take about
180ms (3 HCF jumps) to enter 1100.0 V range. And it takes 1 or 2 measuring processes
to obtain the stable result. Thus a stable LCD reading could be obtained within 1 sec.
In determining whether the input signal is HCF, ES51911 senses the signal at VR1 for
fast response. However if a signal consists of a small ac part and a large enough dc part,
ES51911 might incorrectly treat it as HCF. This could incur range looping phenomenon,
i.e., the measurement could not settle to a specific range.
v1.2
7
11/09/06
1.1.4 The true RMS-to-DC conversion with ES636
If ES636 is used for true RMS-to-DC measurement, the test circuit is shown in Figure 1.
Make ADO and ADI pin short, and TEST5 pin keeps float. Connect OVSG pin to
AGND through a switch in ACV measurement mode.
OVSG
99.5
ACV
OR1
1K
10K
101K
1.111M
VR5
VR4
AGND
VR3
VR2
+Vs -Vs
TEST5
ACVL
7
4.7u
+
4
2
3
6
AGND
TL061
5
30K
N2
+Vs
14
13
12
11
10
9
1
2
3
4
5
6
7
1
N1
100K
ACVH
10K
-Vs
4.7u
+Vs
PWD
OP-
1.5K
-Vs
AGND
0.1u
AGND
10
1K
8
+Vs
500K
-Vs
OP+
AGND
27k
ADO
ADI
3.3u
5k
AGND
10K
AGND
100K
OPO
ADOHZ
Note: The filter capacitors for +Vs and -Vs
are recommended to near to the power
terminals of ES636 and external OPAMP.
AGND
Figure 1. The true RMS-to-DC conversion with ES636
v1.2
8
11/09/06
1.2 Resistance Measurement
A re-configurable divider automatically provides a suitable full-scale range in resistance
measurement mode. The following table summarizes the full-scale ranges and the
reference resistors in each configuration. In 110.0MΩ, the maximum counting number
is 1100 counts and the resolution is 0.1MΩ. So the full scale becomes 110.0MΩ.
Configuration
OR1
Full Scale Range
110.00Ω
Divider Ratio
Resister Connection
R6
R5
100Ω
1KΩ
OR2
1.1000KΩ
OR3
OR4
11.000KΩ
110.00KΩ
R4
R1‖ R3
10KΩ
100KΩ
OR5
1.1000MΩ
1MΩ
R1‖ R2
R1
OR6
OR7
11.000MΩ
110.0MΩ
10MΩ
10MΩ
R1
1.3 Current measurement
ES51911 has 2 automatic and 1 manual current measurement modes for multimeter and
5 manual current measurement modes for clampmeter. The following table summarizes
the full-scale range of each mode. When ES51911 operate in the current measurement
modes for multimeter, It takes high input from pin IVSH or IVSL, low input from pin
SGND and reference voltage from pin VR. When ES51911 operate in the current
measurement modes for Clampmeter, It takes high input from pin ADP, low input from
pin SGND and reference voltage from pins VA+ and VA-. The test circuits are shown in
page 27-28.
Mode
Range Selection
Full Scale
110.00µA / 1100.0µA
11.000mA / 110.00mA
11.000A
Designed for
Multimeter
Multimeter
Multimeter
Automatic Mode 1
Automatic Mode 2
Manual Mode 1
µA
mA
A
Manual Mode 2
Manual Mode 3
Manual Mode 4
Manual Mode 5
Manual Mode 6
A
A
A
A
A
1.1000A
11.000A
110.00A
1100.0A
11000A
Clampmeter
Clampmeter
Clampmeter
Clampmeter
Clampmeter
Note:
1. In Manual DC current measurement modes for clampmeter, ES51911 provides Zero function for offset
removing.
2. In Automatic mode1 and Automatic mode2, the pin VBAR is used to control the display of “µ” and
“m” sign on the LCD panel. If pin VBAR is floating or connected to DGND, the “µ” and “m” sign will
be displayed. If pin VBAR is connected to V-, the “µ” and “m” sign will not be displayed.
v1.2
9
11/09/06
1.4 Capacitance Measurement
The following table summarizes the eight ranges of capacitance measurement mode.
Configuration
Full Scale Range
11.000nF
Resistance Ratio
R1‖ R2
R1‖ R3
C1
C2
C3
C4
C5
C6
C7
C8
110.00nF
1.1000uF
11.000uF
110.00uF
1.1000mF
11.000mF
110.00mF
R4
-
-
-
-
-
Note:
1. In order to obtain an accurate reading, a capacitor must be discharged before
measurement begins. The chip has a built-in discharge mode to automatically
discharge the capacitor. In discharge mode, the LCD displays dS.C
2. Discharging through the chip is quite slow. We recommend the user to discharge the
capacitor with some other apparatus.
1.5 Continuity Check
Continuity check shares the same configuration with 110.00Ω manual resistance
measurement mode, but with buzzer output to indicate continuity. The buzzer generates a
2KHz sound whenever the digit number is less than 30Ω. The short circuit detection is
more sensitive and the response time is less than 10ms.
1.6 Diode Measurement
Diode measurement mode shares the same configuration with 1.1000V manual voltage
measurement mode.. The buzzer generates a 2KHz sound whenever the digit number is
less than 30mV. The short circuit detection is more sensitive and the response time is
less than 10ms.
v1.2
10
11/09/06
1.7 Frequency counter
The time base of the frequency counter is derived from an external crystal oscillator by
4,000,000
Tcounter
=
Fosc
where Fosc is the frequency of the crystal oscillator. Thus, the counter has a 1-second
time base when a 4MHz oscillator is used. The frequency counter can select the proper
range automatically or manually. Auto-range operation extends over six decades, from
1111Hz to 110.00MHz. The following table summarizes the full-scale range of the
frequency counter.
Range
FR112
FR12
FR2
FR3
FR4
Full Scale
11.1 – 111.1Hz
112 – 1111Hz
11.000KHz
110.00KHz
1.1000MHz
11.000MHz
110.00MHz
FR5
FR6
NOTE:
1In the range of FR1, if input frequency is less than 11.1Hz, ES51911 will show 0.0Hz.
2When the reading is more than 111.1Hz, the resolution becomes 1Hz.
1.8 Temperature measurement mode
Temperature measurement mode takes input signal from ADP pin and reference voltage
from (VA+ - VA-). ES51911 has a built-in ℃-to-℉ scale translation circuit, and only
needs an external ℃ scale application circuit. The application circuit for ℉ scale is
not required. In temperature measurement mode, the default range is 1100.0 ℃ or ℉.
VBAR pin is used to control the second decimal point (DP2) on the LCD panel. When
VBAR is LOW, DP2 is turned on and the first decimal point (DP1) is turned off.
v1.2
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11/09/06
1.9 Auto power off and Idle Time selection
ES51911 has a default auto power off function. If the meter is idle for more than the
given Idle Time, the chip automatically turns the power off. The Idle Time to trigger the
auto power off function is determined by pin ‘APOSEL’. If pin APOSEL is connected
to V-, the Idle Time will be set to 30 minutes. If pin APOSEL is connected to DGND or
floating, the Idle Time will be set to 15 minutes. When APO happens, the state of the
meter is saved. The APO sign on the LCD panel indicates whether the auto power off is
enabled or not. In some cases, user might want to disable Auto power off. There are two
ways to disable this feature as following:
1. Power on the meter when any of the push functions, except for HOLD, is pressed
down.
2. In addition, when RS232 output is active, the auto power off function is also
disabled.
Note: Powering on the meter while pressing HOLD and lasts 2 seconds turns on all
LCD segments until HOLD is pressed again.
1.10 Sleep
The meter enters sleep mode after auto power off. The SLEEP pin asserts low (-3V) in
the sleep mode, and asserts high (+3V, not 0V) after re-power on.
1.11 Re-power on
After auto power-off, pushing any of the push function or changing the rotary mode can
turn on the meter again. If the meter is re-powered on by changing the rotary mode, the
saved state is cleared. If the meter is re-powered on by push functions, the chip restores
the saved state and enters HOLD mode. The LCD displays the saved value.
v1.2
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11/09/06
1
Measurement Mode Switching
Measurement mode depends on the logic level of SLACDC, FC1, FC2, FC3, FC4, FC5,
and KEY. When FC5 is high, the measurement mode list is below
SLACDC FC1
FC2
0
1
1
0
1
1
0
0
0
0
0
1
0
1
1
0
1
1
0
1
1
0
0
0
0
0
1
0
1
1
1
FC3
1
0
1
0
1
0
0
1
0
1
0
1
1
1
0
1
0
1
0
1
0
0
1
0
1
0
1
1
1
0
0
FC4
1
1
1
0
0
0
0
0
1
1
1
1
0
0
0
1
1
1
0
0
0
0
0
1
1
1
1
0
0
0
1
Mode
Voltage Measurement
Auto DC Current Measurement(µA)
Auto DC Current Measurement(mA)
11A DC Current Measurement(A)
Manual DC 1.1000A
Manual DC 11.000A
Manual DC 110.00A
Manual DC 1100.0A
Manual DC 11000A
Function of KEY
DCV ↔ ACV
DCA ↔ ACA
DCA ↔ ACA
DCA ↔ ACA
DCA ↔ ACA
DCA ↔ ACA
DCA ↔ ACA
DCA ↔ ACA
DCA ↔ ACA
Ω ↔ Continuity
Continuity ↔ Diode
Ω ↔ Continuity ↔ Diode
—
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
X
1
1
1
0
1
1
1
1
1
0
0
0
0
0
0
1
1
1
0
1
1
1
1
1
0
0
0
0
0
0
0
Resistance Measurement
Continuity Check
Resistance Measurement
Frequency Measurement
Capacitance Measurement
Temperature Measurement
Voltage Measurement
Auto AC Current Measurement(µA)
Auto AC Current Measurement(mA)
11A AC Current Measurement(A)
Manual AC 1.1000A
Manual AC 11.000A
Manual AC 110.00A
Manual AC 1100.0A
Manual AC 11000A
—
℃ ↔ ℉
ACV ↔ DCV
ACµA ↔ DCµA
ACmA ↔ DCmA
ACA ↔ DCA
ACA ↔ DCA
ACA ↔ DCA
ACA ↔ DCA
ACA ↔ DCA
ACA ↔ DCA
—
*ADP0
—
—
—
—
*ADP1
*ADP2
*ADP3
*ADP4
Temperature Measurement
Resistance Measurement
℉ ↔ ℃
Ω ↔ Diode
X means “don’t care”.
*When FC5 is high, the ADP0, ADP1, ADP2, ADP3 and ADP4 modes can display minus sign.
Note1: The Manual DC/AC 1.1A, 11A, 110A, 1100A and 11000A modes are designed for clampmeter.
Note2: The 11A DC And 11AAC Current Measurement modes, (FC1~4) = (0, 0, 0, 0), are designed for
multimeter.
v1.2
13
11/09/06
When FC5=low, KEY is disabled and the measurement mode list is below.
SLACDC FC1
FC2
0
1
1
0
1
1
0
0
0
0
0
1
0
1
1
0
1
1
0
1
1
0
0
0
0
0
1
0
1
1
1
FC3
1
0
1
0
1
0
0
1
0
1
0
1
1
1
0
1
0
1
0
1
0
0
1
0
1
0
1
1
1
0
0
FC4
1
1
1
0
0
0
0
0
1
1
1
1
0
0
0
1
1
1
0
0
0
0
0
1
1
1
1
0
0
0
1
Mode
DC Voltage Measurement
Auto DC Current Measurement(µA)
Auto DC Current Measurement(mA)
11A DC Current Measurement(A)
Manual DC 1.1000A
Manual DC 11.000A
Manual DC 110.00A
Manual DC 1100.0A
Manual DC 11000A
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
X
1
1
1
0
1
1
1
1
1
0
0
0
0
0
0
1
1
1
0
1
1
1
1
1
0
0
0
0
0
0
0
Resistance Measurement
Continuity Check
Diode Measurement
Frequency Measurement
Capacitance Measurement
Temperature Measurement (oC)
AC Voltage Measurement
Auto AC Current Measurement(µA)
Auto AC Current Measurement(mA)
11A AC Current Measurement(A)
Manual AC 1.1000A
Manual AC 11.000A
Manual AC 110.00A
Manual AC 1100.0A
Manual AC 11000A
*ADP0
*ADP1
*ADP2
*ADP3
*ADP4
Temperature Measurement (oF)
Resistance Measurement
X means “don’t care”.
*When FC5 is low, the ADP0, ADP1, ADP2, ADP3 and ADP4 modes can not display minus sign.
Note1: The Manual DC1.1A/11A/110A/1100A/11000A modes are designed for clampmeter.
Note2: The 11A DC Current Measurement mode, (FC1~4) = (0, 0, 0, 0), is designed for multimeter.
v1.2
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11/09/06
2
Push function
All the enabled push functions will be reset when the measurement mode is changed by
rotary switch. Change measurement mode by KEY function will reset enabled Range,
Hold, Max/Min, REL and Zero functions. The following table lists the available
function versus measurement mode.
Function
Mode
Range
O
Hold
O
Max/Min
REL
O
Zero
X
VAHz
O
Voltage
O
O
O
O
O
O
O
O
O
O
Current1
Current2
O
O
O
X
O
X
O
AC
O
DC
X
AC
X
Resistance
Capacitance
Frequency
Continuity
Diode
O
O
O
O
O
X
X
O
O
O
X
X
X
O
O
X
X
X
O
O
X
X
Temperature
X
O
O
X
X
ADP
X
O
O
X
X
Note:
Current1 includes Auto µA, Auto mA and 11A modes.
Current2 includes Manual 1.1A, 11A, 110A, 1100A and 11000A modes.
2.1 HOLD
HOLD mode makes the meter stop updating the LCD panel. This mode can be nested in
most of the special modes. Enabling HOLD function in automatic mode makes the
meter switch to manual mode, but the full-scale range remains the same. HOLD
function can be cancelled by changing the measurement mode, pressing RANGE, or
push HOLD again.
v1.2
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11/09/06
2.2 Range
RANGE pin switches to and from automatic and manual mode, and while in manual
mode, changes the full-scale range. The following figure shows the state transition.
1 push < 1 sec
Automatic
Mode
Manual
Mode
1 push > 1 sec
Range up
1 push < 1 sec
Measurement Mode
V(DC/AC)
Auto
Manual
Control Range
110.00mV – 1100.0V
Initial Range
1.1000V
VRi → VRi + 1,
VR5 → VR1
R1 → R2,
VR2 – VR5
Auto µA(DC/AC)
R1 – R2
110.00µA – 1100.0µA 110.00µA
11.000mA – 110.00mA 11.000mA
R2 → R1
R1 → R2
R2 → R1
fixed
ORi → ORi + 1,
OR7 → OR1
R1－R2
fixed
Auto mA(AC/DC)
11 A(DC/AC)
Ω
11.000A
11.000A
OR1 - OR7
110.00Ω – 110.0MΩ
110.00Ω
Ci → Ci + 1,
C8 → C1
fixed
Capacitance
C1 – C8
11.000nF – 110.00mF
11.000nF
Continuity
Diode
fixed
fixed
110.00Ω
1.1000V
110.00Ω
1.1000V
fixed
FRi → FRi + 1
FR6 → FR1
Frequency
FR1 – FR6
1111Hz – 110.00MHz
1111Hz
Note: Pushing RANGE resets all existing special modes.
2.3 KEY
See Section “Measurement Mode Switching” for the function of this pin.
2.4 REL + HOLD
In REL mode, the LCD panel displays DN+K - DN, where DN = 1, 2, 3, … , DN is the
last value before REL is pushed, and DN+K is the current value. If REL is pushed again
in REL mode, the meter displays the reference value. The meter returns to normal
operation if REL is pressed and held for longer than one second. Pressing HOLD in
REL mode makes the meter stop updating the LCD panel.
v1.2
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11/09/06
1 push < 1s
1 push > 1s
Original State
(Auto/Manual)
1 push > 1s
1 push < 1s
〝REL〞active.
〝REL〞blink.
The relative value
The DN value
push HOLD
push HOLD
〝REL〞and〝H〞active.
〝REL〞and〝H〞blink.
1 push < 1s
Hold the relative value
The DN value
Note: It’s possible that the relative value exceeds 11,000 or –11,000 counts, but never
exceeds 19,999 or –19,999 counts. Such relative values are displayed. The LCD shows
OL in REL mode only if DN or DN+K is more than 10,999 counts or the relative value is
more than 19,999.
2.5 Max/Min + HOLD
The meter displays the maximum or minimum value of the input in Max/Min mode.
When Max/Min is pressed for the first time, the meter displays the maximum value.
When Max/Min is pressed again, the meter displays the minimum value. When
Max/Min is pressed for the third time, the meter displays current value. The meter
returns to normal operation if Max/Min is pressed and held for longer than one second.
Pressing HOLD in Max/Min mode makes the meter stop updating the maximum or the
minimum value.
1 push<1s
Original state
(Automatic/manual)
1 push>1 sec
1 push>1s
1 push>1 sec
1push<1s
1push<1s
“MIN” active
min value
“Max” “MIN” blink
current value
“MAX” active
max value
1push<1s
Push HOLD
Push HOLD
Push HOLD
“MAX”“MIN” “H” blink
hold current value.
“MIN” “H” active
hold min value.
“MAX” “H” active
hold max value.
1push<1s
1push<1s
1push<1s
v1.2
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11/09/06
2.6 Relative + Max/Min + HOLD
Max/Min mode can be nested in REL mode. The meter displays the maximum or
minimum value relative to the reference when Max/Min is pressed in REL mode.
Pressing HOLD under REL + Max/Min makes the meter stop updating the LCD panel.
Original State
(Auto/Manual)
1 push < 1s
1 push >1s
〝REL〞active.
〝REL〞blink.
The relative value
1 push < 1s
The DN value
push Max/Min
push Max/Min > 1s
〝REL〞and〝Max〞active.
〝REL〞and〝Min〞active.
〝REL〞〝 Max〞〝 Min〞
Maximum relative value
Minimum relative value
blink. The DN value
1 push < 1s
1 push < 1s
push HOLD
push HOLD
push HOLD
〝REL〞,〝Max〞,
〝H〞active.
〝REL〞,〝Min〞,
〝REL〞,〝Max〞,
〝Min〞,〝H〞blink.
The DN value
〝H〞active.
1 push < 1s
1 push < 1s
Hold max. rel. value
Hold min. rel. value
1 push < 1s
2.7 Zero : In manual DC 1.1000A, 11.000A, 110.00A, 1100.0A and 11000A
measurement modes, the REL_ZERO pin changes to control Zero function instead of
relative function. In Zero mode, the LCD panel displays DN+K - DN, where DN = 1, 2,
3, … , DN is the last conversion value before Zero is pushed, and DN+K is the current
conversion value. If Zero is pushed again in Zero mode, the meter will refresh the DN
value and displays the DN+K - DN again. The meter returns to normal operation if Zero is
pressed and held for longer than one second. Pressing HOLD in Zero mode makes the
meter stop updating the LCD panel. In Zero mode, LCD will not show any symbol to
remind users of Zero mode is active.
State diagram for Zero mode:
v1.2
18
11/09/06
Original State
Press Zero > 1s
Press Zero
‘Zero’Active
Press Zero < 1s
Show DN+K - DN
State diagram for Zero + HOLD mode:
Original State
Press Zero
Press Zero > 1s
‘Zero’Active
Press Zero < 1s
Show DN+K - DN
Press Hold
‘Zero’‘Hold’Active
Stop LCD upgrading
State diagram for Zero + Max/Min + HOLD mode:
Original State
Press Zero
Press Zero > 1s
‘Zero’Active
Show DN+K - DN
Press Max/Min > 1s
Press Zero < 1s
Press Max/Min
‘Zero’ ‘Max’Active
‘Zero’ ‘Min’Active
Show Max. DN+K - DN
Show Min. DN+K - DN
Press HOLD
‘Zero’ ‘Min’ ‘Hold’Active
Hold Min. DN+K - DN Value
Press Max/Min < 1s
Press HOLD
‘Zero’ ‘Max’ ‘Hold’Active
Hold Max. DN+K - DN Value
Press Max/Min < 1s
v1.2
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11/09/06
3
Serial Data Output
The RS232 function will be activated if the RS232 pin is pulled to and asserts at V-.
The serial data sent to SDO pin once every A/D conversion cycle. The data format
complies with JIS 7Bits transmission code with a baud rate of 19230. The host can use
RS232 interface to read the data. A single data packet includes a start bit (always 0), 7
data bits, an odd parity check bit, and a stop bit (always 1). The high and low voltage
levels correspond to DGND and V- respectively. SDO remains at 1 (high) when it is
inactive. Hence the start bit (0) could be used as the triggering signal to begin the
reading process. The following figure shows the data format of a single packet. The
LSB is sent first and the MSB is sent last.
Single packet
0V
p
P 1
D0 ~D6
0
-3V
LSB
MSB
One data block consists of 11 packets, or 110 bits. The following figure shows the
format of a data block. The range packet indicates the full scale range of the meter.
Digit 3 through digit 0 are just the digits on the LCD panel. The function packet
indicates the measurement mode of the meter. Status, option 1 and option 2 give the
status of the meter. CR and LF are delimiters used to separate the blocks.
All packets
p
p
p
0
1 0
1 0
1
range
digit1
status
digit3
digit2
p
p
p
p
p
p
0
0
1 0
1 0
1 0
1 0
1
1
digit0
function
option2
option1
p
p
0
1 0
1
CR
LF
The meter always outputs the current input value to the serial port in spite of HOLD
mode. Each block is repeated twice in one conversion cycle. The detailed data format of
each packet is listed below.
v1.2
20
11/09/06
3.1 FUNCTUON
This packet indicates the measurement mode of the meter. The following table
summarizes the transmitted code for each mode. Note that the encoding of this packet is
different from the encoding of FC1-FC5 switch.
Code
Measurement Mode
Voltage
0111011
0111101
0111111
0110000
0111001
0110011
0110101
0110001
0110010
0110110
0110100
0111110
Auto µA Current
Auto mA Current
11 A current
Manual A Current
Ω
Continuity
Diode
Frequency
Capacitance
*Temperature
ADP
*The judge bit in the Status packet determines whether the unit is Celsius or Fahrenheit.
3.2 RANGE
This packet indicates the full-scale range of the meter. When the meter operates in
continuity mode or diode mode, this packet is always 0110000 since the full-scale
ranges in these modes are fixed. The following table lists the code for each range in
each measurement mode.
Code
V
Auto mA Auto µA 11 A Manual A ADP
Ω
Frequency Capacitor
1111Hz 11.000nF
0110000 1.1000V 11.000mA 110.00µA
1.1000A ADP4 110.00Ω
0110001 11.000V 110.00mA 1100.0µA 11.000 A 11.000A ADP3 1.1000KΩ
-
110.00nF
0110010 110.00V
0110011 1100.0V
0110100 110.00mV
0110101
110.00A ADP2 11.000KΩ 11.000KHz 1.1000µF
1100.0A ADP1 110.00KΩ 110.00KHz 11.000µF
11000A ADP0 1.1000MΩ 1.1000MHz 110.00µF
11.000MΩ 11.000MHz 1.1000mF
0110110
110.0MΩ 110.00MHz 11.000mF
0110111
110.00mF
v1.2
21
11/09/06
3.3 DIGIT 3 – DIGIT 0
Digit 3 is the second significant digit on the LCD panel, and digit 0 is the least
significant digit.
Digit
Code
0
1
2
3
4
5
6
7
8
9
0110000
0110001
0110010
0110011
0110100
0110101
0110110
0110111
0111000
0111001
Note:
1. The RS232 code of digit4 is in the packet OPTION1
2. Because the cycle time of measurement for continuity/diode mode is only 50ms, the
least significant digit may not be accurate
3.4 STATUS
The format of this package shown below. The Judge field is meaningful only when the
Function packet indicates Temperature mode. In Temperature mode, judge is 1 if the
unit is °F and is 0 of the unit is °C. Sign field indicates whether the minus sign on the
LCD panel is on or off. BATT field is one when battery low condition is true. OL
indicates input overflow.
0
1
1
Judge
BIT 3
Sign
BIT 2
BATT
BIT1
OL
BIT 0
BIT6
BIT 5
BIT 4
3.5 OPTION 1
0
1
1
UL
BIT 3
Digit4
BIT 0
BIT 6
BIT 5
BIT 4
BIT 2
BIT1
UL field will be 1, only when input frequency is less than 11.1Hz in FR1 range of
frequency mode.
The digit4 field will be 1, when the MSD on the LCD is one.
v1.2
22
11/09/06
3.6 OPTION 2
This packet contains information on the operation mode of the meter. The format is
shown below. The DC field indicates that the meter operates in DC measurement mode,
either voltage or current. The AC field indicates that the meter operates in AC
measurement mode, either voltage or current. The AUTO field is set to one if the meter
operates in automatic mode, and is set to zero when the meter operates in manual mode.
0
1
1
DC
BIT 3
AC
BIT 2
AUTO VAHZ
BIT 1 BIT 0
BIT 6
BIT 5
BIT 4
3.7 CR
Carrage return. The transmitted code is 0001101.
3.8 LF
Line feed. The transmitted code is 0001010.
4
Miscellaneous
The conditions on which the meter turns on the buzzer include:
(1) Changing measurement mode generates one beep.
(2) Pressing any of the push functions generates one beep, if the function is valid.
(3) Power on and re-power on generate one beep.
(4) Input overflow in voltage and current mode generates one beep every 0.3 seconds
(or 3.33 beeps per second.)
(5) Continuity(diode) check generates a continuous 2KHz beep whenever the
measurement is less then 30Ω(30mV)
(6) Auto power off generates a 2KHz beep which lasts for 1.5 seconds.
The following figures show the output waveform from the BUZOUT pin.
0.5 mS
(a) Continuous 2KHz beep
v1.2
23
11/09/06
0.15 sec
0.3 sec
(b) 3.33 beep/sec
4.1 LCD Panel
S12
S8 S9S10 S11S15
S17S13
S16 S14
S1 S2
S3
S4 S5
S6S7
BATT AUTO MANU HOLD
REL MAX MIN
BP1 APO
DC
℉
℃
BP2
BP3
BP4
µ1
m1 F
n
AC
µ2 m2
A
V
RS232
Ω Hz
M K
SEG01 SEG02 SEG03 SEG04 SEG05 SEG06 SEG07 SEG08 SEG09
BP1 APO BATT AUTO
MANU A3
B3
G3
HOLD
F2
A2
B2
G2
C2
BP2
BP3
-
DC
F4
E4
A4
G4
D4
B4
C4
F3
E3
D3
AC
BC5
C3
E2
BP4 RS232
DP4
DP3
DP2
D2
SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17
℉
℃
BP1
BP2
BP3
µ2
m2
K
REL
MAX
MIN
n
µ1
m1
F
F1
E1
A1
G1
D1
B1
C1
M
V
A
BP4 DP1
Ω
Hz
Note: The MSD on LCD panel will not shows Zero
v1.2
24
11/09/06
LCD Backplane Waveform
V- +3.2
V-
V- +3.2
V-
V- +3.2
V-
V- +3.2
V-
V- +3.2
V-
4.2 LCD display on condition
LCD Annunciator
Condition
V
A
Ω
F
In voltage measurement mode, and diode measurement mode.
In current measurement mode.
In resistance measurement mode, and continuity mode.
In capacitance measurement mode.
In continuity check mode.
In diode mode.
Hz
DC
AC
In frequency mode.
In DC voltage or DC current mode.
In AC voltage or AC current mode.
AUTO
MANU
HOLD
REL
When automatic full scale range selection is enabled.
In manual mode.
When HOLD function is enabled.
When Relative function is enabled.
MAX / MIN
m1
When Maximum or Minimum function is enabled.
In capacitor measurement mode and the full scale range is in the order of mF.
µ1
n
m2
In capacitor measurement mode and the full scale range is in the order of µF.
In capacitor measurement mode and the full scale range is in the order of nF.
In voltage or current measurement mode and the full scale range is in the order of 10-3.
µ2
M
K
℃
In current measurement mode and the full scale range id in the order of µA.
In resistance measurement mode and the full scale range is in the order of MΩ
In resistance measurement mode and the full scale range is in the order of KΩ
In temperature measurement mode and when the unit is ℃
In temperature measurement mode and when the unit is ℉
When auto power off function is enabled.
℉
APO
RS232
When RS232 output is enabled.
v1.2
25
11/09/06
4.3 Operating Timing
ES51911 incorporates a dual slope ADC with four phases: ZI, AZ, INT and DINT.
The timing of each phase are listed below.
*Voltage /Current /ohm /ADP measurement:
Phase
ZI
Time
20ms
AZ
20ms
INT
DINT
100ms
110ms
P.S. In the DC voltage and ohm measurement with auto mode, if the range is
changed, the internal clock rate will increase five times and the new measurement
cycle becomes 1/5 times of the original cycle until the range is stable.
*Continuity/diode measurement
Phase
ZI
Time
4ms
AZ
4ms
INT
DINT
20ms
22ms
*Capacitance measurement:
Range
Total Measurement Time
0.25sec
11.000nF
110.00nF
1.1000uF
11.000uF
110.00uF
1.1000mF
11.000mF
110.00mF
0.25sec
0.25sec
0.25sec
0.5sec
1.0sec
2.5sec
12.5sec
*Frequency measurement
In range FR1, the measurement cycle = 0.5 sec
In range FR2~FR6, the measurement cycle = 1.05 sec
P.S. In the frequency measurement with auto mode, if the range is changed, the
internal clock rate will increase ten times and the new measurement cycle
becomes 1/10 times of the original cycle until the range is stable.
v1.2
26
11/09/06
5
Test Circuit
1. Voltage test
4. Current test
AGND
OVSG
AGND
SGND
99.5
OR1
VR5
VR4
VR3
VR2
0.01
10A
1K
10K
101K
1.111M
0.99
mA
ADO
D2
1.0u
9
4.7u
1.0u
mA
uA
uA
D1
88M
ADI
100K
100K
90
A
ACVL
ACVH
TEST5
mA
uA
0.1u
IVSH
IVSL
7.5K
900
7.5K
6.2K
V
R
1
V
R
2K
5. Diode test
10M
-100mV
AGND
OVH
100
Voltage input
Z1
6V
Z2
PTC
1.5K
VR1
2. Resistor test
10M
OVX
VR2
1.111M
PTC
1.5K
OVSG
OVH
100
6. Low battery
Z1
OVSG
6V
Z2
99.5
OR1
VR5
VR4
VR3
VR2
1K
9V
10K
101K
1.111M
680K
BA
TT
LBAT9
SGND
AGND
0.1u
AGND
V-
270K
0V
3. Current test for clamp meter
8. Frequency test
7. ADP test
F
R
E
Q
VA+
VA-
-100mV
VR
100K
ADPin+
ADPin-
ADP
200
2.2u
ADP
RL
100K
R
SGND
AGND
SGND
AGND
PTC
1.5K
VA+
VA-
Fin
Vref
-
v1.2
27
11/09/06
7. Application Circuit
5.6V ZI
+
7.5V ZI
V-
3V
+
10μ
10μ
0.47μ
4M
0.1μ
0.1μ
μA/mA
μA
μA
V+
V+
CREF+
μA
900
90
0.1μ
100n
470n
90k
30k
100K
100K
(80) RANGE
HOLD
REL_ZERO
NC
mA
mA
CREF-
CINT (5)
CAZ
BUFF
RAZ
IVSH
IVSL (10)
OVX
OVH
OVSG
OR1
VR5 (15)
VR4
VR3
mA
9
VAHZ
(75) MAX/MIN
BKOUT
BUZOUT
BUZIN
ANNUNC
(70) BP1
BP2
10A
10A
0.99
0.01
5.6V ZI
V-
100K
100
220p
Ω
1.5K
PTC
99.5
1K
10K
BP3
BP4
SEG01
(65) SEG02
SEG03
V/Ω/
101K
VR2
1.111M
6K
TEST5
SEG04
ACVL (20)
ACVH
SEG05
SEG06
2K
(60) SEG07
SEG08
0.1μ
ADI
ADO
7.5K
1μ
1μ
88M
SEG09
SEG10
SEG11
+
7.5K
+
4.7μ
(55) SEG12
SEG13
D1
D2
ADOHZ
OPO (25)
OPIN+
OPIN-
PWD
SEG14
SEG15
SEG16
91K
10K
VRH
1μ
VR (30)
+
9K
100K
ADP
1μ
1K
+
Cp
V-
1.5K
PTC
C
Hz
Notes:
1. Most of pins are protected by the ESD protection circuits. However pins, V+, V-, AGND, DGND and
VR1 are not protected enough because the parasitic effect must be decrease. Therefore enough external
protection is needed for assembling, carrying and keeping. In addition, components connecting to these
unprotected pins have to be soldered on board before the IC is soldered.
2. Cp is the compensation capacitor for measuring capacitance. Its value depends on the parasitic
capacitor on the PCB board.
3. Light shielding for the diodes and Zeners.
4. Zener diodes in above circuit are used for IC protection, so MUST be soldered on PCB first.
v1.2
28
11/09/06
8. Package
1 100 Pin QFP Package
Title:
topview.eps
Creator:
fig2dev Version 3.2 Patchlevel 1
預覽:
此EPS圖片尚未將其
縮圖資料一併儲存。
註解:
此EPS圖片將列印至一
印表機， 而非
PostScript
其他類型的印表機。
Title:
sideview.eps
Creator:
fig2dev Version 3.2 Patchlevel 1
預覽:
此EPS圖片尚未將其
縮圖資料一併儲存。
註解:
此EPS圖片將列印至一
印表機， 而非
PostScript
其他類型的印表機。
2 Dimension Paramenters
Milimeter
Mill
Symbol
Min. Typ. Max. Min. Typ. Max.
W
L
19.90 20.00 20.10 783.5 787.4 791.3
13.90 14.00 14.10 547.2 551.2 551.2
A
B
C
d
0.425
0.20 0.30 0.40
0.65
16.7
11.8
25.6
47.2
7.9
11.8
1.05 1.20 1.35 41.3
47.2
a
2.57 2.72 2.87 101.2 107.1 107.1
D
θ
2.50
98.4
0o
10o
v1.2
29
11/09/06
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