ES218
2000 Counts Manual DMM
Features
Band-gap reference voltage output
Current mode overflow selection
Voltage mode overflow selection
( DC / AC : 1010V, DC / AC : 610V)
2,000 counts manual type DMM with LCD display
100L LQFP package
3V DC power supply
Fast ADC Conversion rate : 4 times/s for V/R modes
Manual type measurement
＊
Voltage measurement :
200mV/ 2V/20V/200V/ 1000V
＊
Current measurement :
20.00u/200.0u/2000u/20.00m/200.0m/20A
＊
Resistance measurement :
200/2k/20k/200k/2M/ 20M/200MΩ
＊
Capacitance measurement:
2n/20n/200n/2u/20u/200u/2m/20mF
＊
Not contact AC electric field detection
＊
Diode voltage measurement
＊
Continuity check
LCD segment check when power on
Auto power off ( 30min idle time )
Sleep state indicative signal output
Re-power on
On-chip buzzer driver
Low battery detection
Description
Auto frequency measurement mode
200.0Hz ~ 20.00MHz auto range
Hazardous AC/DC voltage (HV) indication
4 ADP modes for extension application
Temperature mode with internal scale translation
circuit from
0
C to
0
F (1
o
C resolution)
K-type thermocouple reference table compensation
(-200 ~ 1350
o
C range)
Push functions :
＊
MAX/MIN
＊
KEY function (AC/DC or
o
C/
o
F swap)
＊
Data Hold & Backlight function
ES218 is an integrated analog-to-digital converter
with 2,000-count LCD, manual type DMM IC
which is operated 3V DC power supply.
Automatic range selection is provided for
frequency measurement only. It could support
AC/DC
voltage
measurement,
resistance
measurement, capacitance measurement, and
AC/DC current measurement. Expensive and
bulky mechanical range switches are not required.
Other features include data holding, maximum and
minimum value holding, diode measurement,
temperature measurement, continuity checking,
low battery detection, auto power off, re-power on,
backlight driver and buzzer driver.
Application
Manual type digital multimeter
Manual type digital clamp meter
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2015/12/11
ES218
2000 Counts Manual DMM
Pin Assignment
100L LQFP package
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
IVS
ADP
NC
NC
AGND
AGND
DGND
V+
V+
V-
V-
LBAT9
CN
CP
SLACDC
FC1
FC2
FC3
FC4
FC5
FC6
BUZOUT
OSC2
NC
NC
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
NC
NC
NC
CIN
T
CA
Z
RA
Z
CR
EFP
CR
EFN
VR
H
VR
VR
_ADP
OH
MC3
OH
MC2
OH
MC1
OR
1
VR
5
VR
4
VR
3
VR
2
OV
SG
VR
1
mV
in
OV
X
OV
H
NC
ES218
NC
NC
NC
OS
C1
S20uA
HO
LD
KE
Y
MM
X
SEG
01
SEG
02
SEG
03
SEG
04
SEG
05
SEG
06
SEG
07
SEG
08
SEG
09
SEG
10
SEG
11
SEG
12
SEG
13
SEG
14
SEG
15
AN C
NUN
NC
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
V 1.5
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
SGND
ACVL
ACVH
ADI
ADO
TEST5
CAP
CAN
R10K
R1K
NC
FREQ
ALARM
BKOUT
CESEL
DISDGBP
VST
SLEEP
ASEL
DIOV
BUZIN
BP4
BP3
BP2
BP1
2
2015/12/11
ES218
2000 Counts Manual DMM
Pin Description
Pin No
1-3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
Symbol
NC
CINT
CAZ
RAZ
CREFP
CREFN
VRH
VR
VR_ADP
OHMC3
OHMC2
OHMC1
OR1
VR5
VR4
VR3
VR2
OVSG
VR1
mVin
OVX
OVH
NC
SGND
ACVL
Type
-
O
O
O
O
O
O
I
I
O
O
O
O
O
O
O
O
O
I
I
I
O
-
I
I
external AC to DC converter.
Not Connected.
Description
High-resolution integrator output. Connect to integrate capacitor. (Metalized
Polypropylene Film Capacitor type is recommended)
High-resolution auto-zero capacitor connection.
Buffer output pin in AZ and ZI phase.
Positive connection for reference capacitor of A/D.
Negative connection for reference capacitor of A/D.
Output of band-gap voltage reference. Typically –1.23V.
Reference input voltage connection. Typically –400mV.
Reference input voltage connection. Typically –400 mV.
Filter capacitor connection for resistance mode.
Filter capacitor connection for resistance mode.
Filter capacitor connection for resistance mode.
Reference resistor connection for 200.0Ω range
Voltage measurement ÷10000 attenuator(1000V)
Voltage measurement ÷1000 attenuator(200.0V)
Voltage measurement ÷100 attenuator(20.00V)
Voltage measurement ÷10 attenuator(2.000V)
Sense low voltage for resistance/voltage measurement
Voltage measurement Input. Connect to an accurate
10MΩ resistor.
Measurement input in 200.0mV mode.
Sense input for resistance / capacitance measurement.
Output connection for resistance measurement.
Not Connected.
Signal Ground input.
Rectified signal low input in ACV/ACA mode. Connect to negative output of
Rectified signal high input in ACV/ACA mode. Connect to positive output of
28
29
30
31
32
33
34
35
36
37
38
V 1.5
ACVH
ADI
ADO
TEST5
CAP
CAN
R10K
R1K
NC
FREQ
ALARM
I
external AC to DC converter.
I
O
O
O
O
O
O
-
I
O
Negative input of internal AC to DC OP Amp.
Output of internal AC to DC OP Amp.
Buffer output of OVSG.
Positive auto-zero capacitor connection for capacitor measurement.
Negative auto-zero capacitor connection for capacitor measurement.
Connect to a precise 10KΩ
resister for capacitor measurement.
Connect to a precise
1KΩ resister for capacitor measurement.
No connection
Frequency counter input, offset V-/2 internally by the chip.
HV signal detection in Voltage mode and EF mode indication output.
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ES218
2000 Counts Manual DMM
Pin Description ( Continued )
Pin No
39
40
41
42
43
44
45
46
47-50
51
Symbol
BKOUT
CESEL
DISDGBP
VST
SLEEP
ASEL
DIOV
BUZIN
BP4-1
NC
Type
O
I
I
I
Description
Push Hold key lager than 2 sec. to enable the back light function. This pin will
change from V- to V+ and lasts for 5 minutes.. Once press Hold key lager than 1
sec. again , this pin will change level back to V-.
Voltage OL selection feature control pin. (1010V/610V)
Control warning buzzer output at HV mode. Pulled to low and buzzer is disabled.
In µA or mA modes, it is used to control the ‘µ’ or ‘m’ sign. Set to V- to enable
clamp current mode. The initial voltage range will be set to 200.0V range also.
O
I
Sleep mode indicator, asserts low in SLEEP mode.
Current mode OL indication for 2000A (VST = V-) or 20A (VST = Floating)
ranges
I
I
O
-
Pulled to V- to set the 2.8V OL level in diode mode measurement
Pulled to V- to enable the buzzer output (BUZOUT) always.
LCD backplane 4 - LCD backplane1
Not connected
Square wave output at the backplane frequency, synchronized to BP1. ANNUNC
52
ANNUNC
O
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.
53-67
68
69
70
71
72
73-77
78
79
80
81
82
83
84
85
86
87
88
SEG15 - SEG01
MMX
KEY
HOLD
S20uA
OSC1
NC
OSC2
BUZOUT
FC6
FC5
FC4
FC3
FC2
FC1
SLACDC
CP
CN
O
I
I
I
I
-
-
LCD segment line 01 – 14.
Pulse to V- to enable MAX/MIN function.
Pulse to V- to change mode.
Pulse to V- less than 1 second. to enable HOLD function.
Pulled to V- to change 200.0uA to 20.00uA display
Connect to 4MHz crystal oscillator
Not connected
Connect to 4MHz crystal oscillator
O
I
I
I
I
I
I
I
O
O
Outputs a 2KHz audio frequency signal for driving piezoelectric buzzer
Switch 6 for function selection.
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.
Select initial DC/AC state.
Positive capacitor connection for on-chip DC-DC converter.
Negative capacitor connection for on-chip DC-DC converter.
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ES218
2000 Counts Manual DMM
Pin Description ( Continued )
Pin No
Symbol
Type
Description
Low battery configuration. If 3V battery is used, connect it to DGND. The default
89
LBAT9
I
low-battery threshold voltage is –2.3V. If 9V battery is used, the low battery
enunciator is displayed when the voltage of this pin is less than VRH (-1.2V)
90
91
92
93
94
95
96
97-98
99
100
V-
V-
V+
V+
DGND
AGND
AGND
NC
ADP
IVS
P
P
O/P
O/P
P/G
P/G
P/G
-
I
I
Negative supply voltage.
Negative supply voltage.
Output of on-chip DC-DC converter.
Output of on-chip DC-DC converter.
Digital ground.
Analog ground.
Analog ground.
Not connected
Measurement input in ADP/Temp mode.
Measurement input in uA/mA/A current mode.
V 1.5
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2015/12/11
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