ES51932
22,000 Counts Auto DMM
Features
•
22,000 counts LCD driver with 46-segment
bargraph display
•
Conversion rate : 2 times/s
•
Full automatic measurement
*Voltage measurement:
Manual 220.00mV / Auto 2.2000V – 1000.0V /
Auto 220.00 – 1000.0V
*Current measurement:
μA/mA/A
*Resistance measurement:
220.00Ω – 220.00MΩ
*Capacitance measurement:
22.000nF – 220.00mF(25sec)
(Taiwan
patent no.: 323347, 453443)
*Frequency counter
22.00Hz – 220.00MHz
•
Current modes for clamp meter
•
Duty cycle measurement (5.0% ~ 94.9%)
•
Diode measurement & continuity check
•
ADP mode with independent reference voltage
•
Temperature mode with internal scale translation
circuit from
o
C to
o
F
•
Push functions
*Range change function
*VAHZ function
*Peak Hold with automatic calibration
(Taiwan
patent no.: 476418)
*Relative function
*Zero function in manual DCA mode
*Data
hold function with delay hold feature
*MAX/MIN function
*Back-light function
*KEY function
Ver. 1.2
1
10/05/27
•
Programmable LCD segment display
•
Support a selectable low pass filter 3dB
bandwidth for ACV & ACA measurement
(Taiwan patent no.: 362409)
(China
patent no.: 1363073)
•
SHIFT function
•
High-crest-factor signal detection
(Taiwan
patent no.: 234661)
•
Band-gap reference voltage output
•
CE selection (610V, 1010V or 1500V)
•
Serial data output (RS232 format)
•
LCD segment check when power on
•
Auto power off with idle time selection
•
Sleep output
•
On-chip buzzer driver
•
3V DC power supply
•
Low battery detection for 3V or 9V battery
Description
ES51932 is an integrated analog-to-digital
converter (ADC) with 22,000 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 peak detection with calibration mode,
relative value display, Zero function, 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.
ES51932
22,000 Counts Auto DMM
Application
Digital multimeter
Clamp meter
Thermometer
Pin Assignment
LQFP-128L
1
2
3
4
C
B
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
BKLIT
PEAK
M AX/MIN
KEY
REL_ZERO
RANGE
HOLD
ANNUNC
BP1
BP2
BP3
BP4
SEG01
SEG02
SEG03
SEG04
SEG05
SEG06
SEG07
SEG08
SEG09
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
D
102
101
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
75
74
73
72
71
70
69
68
67
66
65
D
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
A
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
26
27
28
29
30
31
32
33
34
35
36
37
38
V+
V+
DGND
AGND
AGND
CH+
CH-
CIH
BUFFH
CAZH
CL+
CL-
CIL
CAZL
BUFL
RAZ
IVSH
IVSL
OVX
OVH
OVSG
OR1
VR5
VR4
VR3
VR2
TEST5
ACVL
ACVH
ADI
ADO
OHM C4
OHM C3
OHM C2
OHM C1
NC
VRH
VR
VAHZ
BUZOUT
BKOUT
OS
C2
OS
C1
SCLK
SDATA
uPLCD
RS232
APOSEL
BKSEL
VS
T
SHIFT
CESEL
SLACDC
FC5
FC4
FC3
FC2
FC1
SDO
C+
C-
V-
V-
LB
AT9
ES51932
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
FREQ
SLEEP
BUZIN
LPFC3
LPFOUT
LPFC2
LPFC1
PM
AX
PM
IN
R1K
R9K
CA+
CA-
VB
AR
VR
1
V220m
VA-
VA+
ADP
SGND
C
B
A
1
2
3
4
Ver. 1.2
2
10/05/27
ES51932
22,000 Counts Auto DMM
Pin Description
Pin No
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
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
Ver. 1.2
Symbol
V+
V+
DGND
AGND
AGND
CH+
CH-
CIH
BUFFH
CAZH
CL+
CL-
CIL
CAZL
BUFFL
RAZ
IVSH
IVSL
OVX
OVH
OVSG
OR1
VR5
VR4
VR3
VR2
TEST5
ACVL
ACVH
ADI
ADO
OHMC1
OHMC2
OHMC3
OHMC4
NC
VRH
VR
SGND
ADP
VA+
VA-
V220m
VR1
VBAR
CA-
Type
O
O
P/G
P/G
P/G
IO
IO
O
O
O
IO
IO
O
O
O
O
I
I
I
I
O
O
O
O
O
O
IO
O
O
I
O
O
O
O
O
-
O
I
G
I
I
I
I
I
I
IO
Description
Output of on-chip DC-DC converter.
Output of on-chip DC-DC converter.
Digital ground. Connecting to 3V battery positive terminal.
Analog ground.
Analog ground.
Positive connection for reference capacitor of high-speed A/D.
Negative connection for reference capacitor of high-speed A/D.
High-speed integrator output. Connect to integral capacitor.
High-speed buffer output pin. Connect to integral resistor.
High-speed auto-zero capacitor connection.
Positive connection for reference capacitor of high-resolution A/D.
Negative connection for reference capacitor of high- resolution A/D.
High-resolution integrator output. Connect to integral capacitor.
High-resolution auto-zero capacitor connection.
High-resolution Buffer output pin. Connect to integral resistor
Buffer output pin in AZ and ZI phase.
Current measurement input for 2200μA, 220mA and 22A modes.
Current measurement input for 220μA, 22mA.
Input high voltage for resistance measurement
Output connection for resistance measurement
Sense low voltage for resistance measurement
Reference resistor connection for 220.00Ω range
Voltage measurement ÷10000 attenuator(1000.0V)
Voltage measurement ÷1000 attenuator(220.00V)
Voltage measurement ÷100 attenuator(22.000V)
Voltage measurement ÷10 attenuator(2.2000V)
Test pin
DC signal low input in ACV/ACA mode. Connect to negative output
of external AC to DC converter.
DC signal high input in ACV/ACA mode. Connect to positive output
of external AC to DC converter.
Negative input of internal AC to DC OP Amp.
Output of internal AC to DC OP Amp.
Filter capacitor connection for resistance mode.
Filter capacitor connection for resistance mode.
Filter capacitor connection for resistance mode.
Filter capacitor connection for resistance mode.
Output of band-gap voltage reference. Typically –1.23V
Reference input voltage connection. Typically –100mV
Signal Ground.
Measurement input in ADP mode. Connect to AGND if no used.
For ADP mode. De-integrating voltage positive input. The input
should be higher than VA-.
For ADP mode. De-integrating voltage negative input. The input
should be lower than VA+.
Independent input terminal for AC/DC 220.00mV mode.
Measurement Input.
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.
Negative auto-zero capacitor connection for capacitor measurement
3
10/05/27
ES51932
22,000 Counts Auto DMM
47
CA+
48
R9K
49
R1K
50
PMIN
51
PMAX
52
LPFC1
53
LPFC2
54
LPFOUT
55
LPFC3
56
BUZIN
57
SLEEP
58
FREQ
59 - 90 SEG32 – SEG01
91
BP4
92
BP3
93
BP2
94
BP1
95
ANNUNC
IO
O
O
O
O
O
O
O
I
I
O
I
O
O
O
O
O
O
Positive auto-zero capacitor connection for capacitor measurement
Connect to a precise 9KΩ resister for capacitor measurement.
Connect to a precise 1KΩ resister for capacitor measurement.
Minimum peak hold output
Maximum peak hold output.
Capacitor C1 connection for internal low-pass filter
Capacitor C2 connection for internal low-pass filter
Capacitor C1 connection for internal low-pass filter
Capacitor C3 connection for internal low-pass filter
Pull to V- to enable the BUZOUT.
Sleep mode indicator, asserts low in SLEEP mode.
Frequency counter input, offset V-/2 internally by the chip.
LCD segment line 01 – 32
LCD backplane 4
LCD backplane 3
LCD backplane 2
LCD backplane 1
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.
Pulse to V- to enable HOLD function.
Pulse to V- to enable manual mode and manual range selection.
Pulse to V- to enable Relative function or Zero function.
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.
Pulse to V- to enable MAX/MIN function.
Pulse to V- to enable Peak Hold mode.
Back light function. Pulse low to set BKOUT pin output.
Pulse to V- to enable VAHZ mode.
Outputs a 2KHz audio frequency signal for driving piezoelectric
buzzer when BUZIN is low.
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.
Crystal oscillator output connection
Crystal oscillator input connection
Clock signal input for programmable LCD segment display.
Serial data input pin for programmable LCD segment display.
Enable pin for programmable LCD segment display and SDO output
enable
Assert low to enable serial data output.
Idle time selection for auto power off feature.
Set to V- to change the backlight idle time from 60 sec. to 180 sec.
Set to V- to enable the auto range voltage mode to start from 220.00V
range.
Assert low to enable LCD SHIFT future, only works in 220MΩ, and
all capacitor measurement ranges
CE selection feature control pin.
Select initial state.
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.
4
10/05/27
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
Ver. 1.2
HOLD
RANGE
REL_ZERO
KEY
MAX/MIN
PEAK
BKLIT
VAHZ
BUZOUT
BKOUT
OSC2
OSC1
SCLK
SDATA
μPLCD
RS232
APOSEL
BKSEL
VST
SHIFT
CESEL
SLACDC
FC5
FC4
FC3
FC2
FC1
I
I
I
I
I
I
I
I
O
O
O
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
ES51932
22,000 Counts Auto DMM
123
124
125
126
127
128
SDO
C+
C-
V-
V-
LBAT9
O
O
O
P
P
I
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.
Negative supply voltage. Connecting to 3V battery negative terminal.
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)
Absolute Maximum Ratings
Characteristic
Supply Voltage (V- to AGND)
Analog Input Voltage
V+
AGND/DGND
Digital Input
Power Dissipation. Flat Package
Operating Temperature
Storage Temperature
Rating
-4V
V- -0.6 to V+ +0.6
V+
≥
(AGND/DGND+0.5V)
AGND/DGND
≥
(V- -0.5V)
V- -0.6 to DGND +0.6
500mW
0℃ to 70℃
-25℃ to 125℃
Electrical Characteristics
TA=25℃, V- = -3V
Parameter
Power supply
Operating supply current
In DCV mode
Voltage roll-over error
Voltage nonlinearity
Input Leakage
Low battery flag voltage
Zero input reading
Band-gap reference voltage
V
REF
Peak to peak backplane
drive voltage
Counter time base period
Symbol
Test Condition
V-
I
DD
Normal operation
In sleep mode
I
SS
REV 10MΩ input resistor
Best case straight
NLV
line
V- to AGND
10MΩ input resistor
100KΩ resistor
between VRH and
AGND
-3.5V
≤
V
≤
-2.2V
f
OSC
= 4MHZ
Between V- pin and
HOLD, RANGE,
KEY, FC1, FC2,
FC3, FC4, FC5,
BKLIT,MAXMIN
Between V- pin
and RS232
220Ω mode
Min.
-3.5
—
—
—
—
-10
-2.5
-000
-1.3
3.0
—
Typ.
-3.0
2.0
2.5
—
—
1
-2.3
000
-1.2
3.1
1
1.2
Max
-2.5
2.5
5
±0.03
±0.03
10
-2.1
+000
-1.1
3.2
—
Units
V
mA
µA
%F.S
1
%F.S
PA
V
counts
V
V
sec
Internal pull-high to 0V
current
—
—
µA
—
—
11
-3.0
—
—
V
10/05/27
Open circuit voltage for 220Ω
measurement
Ver. 1.2
5
Analog electronics
京公网安备 11010802033920号
EEWORLD
