6,600 Counts Auto DMM
Features
•
6,600 counts LCD display
•
100L QFP package
•
3V DC power supply
•
Conversion rate : 3 times/s
•
Full automatic measurement
*Voltage measurement: 660.0mV – 1000V
*Current measurement:
μA/mA/A
•
Auto power off (30min/15min)
•
Sleep state indicative signal output
•
Re-power on
•
On-chip buzzer driver
•
Low battery detection for 3V or 9V battery
ES51969
Description
•
•
•
•
•
•
•
ES51969 is an integrated analog-to-digital
converter (ADC) with 6,600 counts LCD
*Resistance measurement: 660.0Ω
–
66.00MΩ
display, automatic range selection, and 3V DC
*Capacitance measurement: 6.600nF –
66.00mF(6.6sec) (Taiwan
patent no.: 453443)
power supply. Automatic range selection is
*Frequency counter: 660.0Hz – 66.00MHz
provided for voltage (AC/DC) measurement,
Current modes for clamp meter with ZERO
resistance measurement, current measurement,
function
capacitance measurement, and frequency
Duty cycle measurement: 10.0% – 94.9% (0.66sec)
counter. Expensive and bulky mechanical
Diode measurement
range switches are not required. Other features
Continuity check
include inrush function, relative value display,
4 ADP modes with external reference voltage and
zero feature for DCA clampmeter, VAHZ
independent “ADP” segment on LCD panel
data holding, maximum and
Temperature mode with internal scale translation
function,
0
0
circuit from C to F
minimum value holding, duty cycle
Push functions:
measurement, diode measurement, temperature
*KEY function
measurement, continuity checking, low battery
*Range change function
detection, auto power off, re-power on,
*Inrush
function: ACA for clampmeter only
backlight driver, buzzer driver and RS232 data
*Relative function
output.
*Zero
function: DCA for clampmeter only
*VAHz function (Taiwan
patent no.: 510502)
*Data hold function
*MAX/MIN function
*Back light function
•
High crest factor signal detection
(Taiwan
patent no. 234661)
•
Band-gap reference voltage output
•
OL/UL state indicator in ADP modes.
•
CE selection (DC/AC 1010V, DC/AC 610V)
•
Serial data output (RS232 format)
•
LCD segment check when power on
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1
10/09/27
Application
Digital multimeter
Clamp meter
Thermometer
Pin Assignment
VAHZ
MAX/MIN
VST
OSC2
OSC1
BKOUT
R_OVH
ENIR
ZERO
BUZIN
OR
BUZOUT
ANNUNC
BP1
BP2
BP3
BP4
SEG01
SEG02
SEG03
SEG04
SEG05
SEG06
SEG07
SEG08
SEG09
SEG10
SEG11
SEG12
SEG13
50
10
15
20
25
v2.61
V+
CREF+
CREF-
CINT
CAZ
BUFF
RAZ
IVSH
IVSL
OVX
OHMC
OVH
OVSG
OR1
VR5
VR4
VR3
VR2
TEST5
ACVL
ACVH
ADI
ADO
ADOHZ
VRH
VR
VA+
VA-
ADP
SGND
2
30
5
REL
HOLD
RANGE
CESEL
BKSET
KEY
SLACDC
FC5
FC4
FC3
FC2
FC1
LBAT9
SDO
C-
C+
V-
DGND
AGND
AGND
85
90
Cyrustek.
com.tw
45
95
ES51969
40
35
100
SEG14
SEG15
SEG16
SEG17
APOSEL
BKLIT
DSHIFT
RS232
FREQ
SLEEP
OHMC2
CSH-
CSH+
CA+
CA-
R1K
R9K
VBAR
VR1
OHMC1
80
75
70
65
60
55
10/09/27
Pin Description
Pin No
1
2
3
4
5
6
7
V+
CREF+
CREF-
CINT
CAZ
BUFF
RAZ
IVSH
IVSL
OVX
OHMC
OVH
OVSG
OR1
VR5
VR4
VR3
VR2
TEST5
ACVL
ACVH
ADI
ADO
ADOHZ
VRH
VR
VA+
VA-
ADP
SGND
OHMC1
VR1
VBAR
R9K
R1K
CA-
CA+
CSH+
CSH-
OHMC2
SLEEP
FREQ
RS232
DSHIFT
BKLIT
Symbol
Type
O
I/O
I/O
O
I
O
O
I
I
I
O
I
I
O
O
O
O
O
I/O
O
O
I
O
I
O
I
I
I
I
G
O
I
I
O
O
I/O
I/O
O
O
O
O
I
I
I
I
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
v2.61
Output of on-chip DC-DC converter.
Positive connection for reference capacitor.
Negative connection for reference capacitor.
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.
High current measurement input.
Low current measurement input
Input high voltage for resistance measurement
Filter capacitor connection for resistance mode below 6.600MΩ
range.
Output connection for resistance measurement
Sense low voltage for resistance measurement
Reference resistor connection for 660.0Ω range
Voltage measurement ÷10000 attenuator(1000V)
Voltage measurement ÷1000 attenuator(660.0V)
Voltage measurement ÷100 attenuator(66.00V)
Voltage measurement ÷10 attenuator(6.600V)
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.
Frequency input under voltage/current mode, offset to AGND.
Output of band-gap voltage reference. Typically –1.2V
Reference input voltage connection. Typically –400mV
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+.
Measurement input in ADP mode.
Signal Ground.
Filter capacitor connection for resistance mode under 660.0KΩ
range.
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, pull to V- to disable the ‘µ
2
’ or ‘m
2
’ sign on LCD.
Connect
to a precise 9KΩ resister.
Connect to a precise 1KΩ resister.
Negative auto-zero capacitor connection for capacitor measurement
Positive auto-zero capacitor connection for capacitor measurement
Positive connection to external capacitor.
Negative connection to external capacitor.
Filter capacitor connection for 6.600MΩ range in resistance mode.
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.
Pull to V-
to have 0.01MΩ resolution in 66.00MΩ.
Pull to DGND or keep it float will change the resolution to 0.1MΩ.
Back light function. Pulse low to set BKOUT pin output.
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10/09/27
Description
46
APOSEL
47 - 63 SEG17 – SEG01
64
BP4
65
BP3
66
BP2
67
BP1
68
ANNUNC
69
70
BUZOUT
OR
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
BUZIN
ZERO
ENIR
R_OVH
BKOUT
OSC1
OSC2
VST
MAXMIN
VAHZ
REL
HOLD
RANGE
CESEL
BKSET
KEY
87
88
89
90
91
92
93
SLACDC
FC5
FC4
FC3
FC2
FC1
LBAT9
94
95
96
97
98
99 - 100
SDO
C+
C-
V-
DGND
AGND
Auto power off idle time selection.
LCD segment line 01 – 17
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.
O Outputs a 2KHz audio frequency signal for driving piezoelectric buzzer
when BUZIN is low.
O OL/UL state indicator in
ADP
modes. Origin state is low(V-), it goes to
high(DGND) only when the reading is over 6,600 counts. It comes
back to low only when the reading is less than 600 counts. It will keep
the state when the reading is between 600 and 6600 counts.
I
Pull to V- to enable the BUZOUT.
I
Pulse to V- to enable ZERO function.
I
Pull to V- to enable the INRUSH function.
I
Pull to V- to allow protection resistance increasing at OVH path
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.
I
Crystal oscillator input connection
O Crystal oscillator output connection
I
Set to V- to enable the auto range voltage mode to start from 660.0V
range.
I
Pulse to V- to enable MAX/MIN function.
I
Pulse to V- to enable VAHZ mode.
I
Pulse to V- to enable Relative function.
I
Pulse to V- to enable HOLD function.
I
Pulse to V- to enable manual mode and manual range selection.
I
CE selection feature control pin.
I
Set to V- to change the backligh idle time from 60 sec. to 180 sec.
I
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.
In ACA modes for Clampmeter (FC5=low), pulse low to V- could
enable Inrush function.
I
Select initial state. Please refer to page 14
I
Switch 5 for function selection.
I
Switch 4 for function selection.
I
Switch 3 for function selection.
I
Switch 2 for function selection.
I
Switch 1 for function selection.
I
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)
O RS232 compliant serial data output.
O Positive capacitor connection for on-chip DC-DC converter.
O Negative capacitor connection for on-chip DC-DC converter.
P
Negative supply voltage. Connecting to battery negative terminal.
P/G Digital ground. Connecting to battery positive terminal.
P/G Analog ground.
I
O
O
O
O
O
O
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10/09/27
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
Reference voltage and open circuit
voltage for 660Ω measurement
Peak to peak backplane
drive voltage
Counter time base period
Open circuit voltage for
Ω
measurement (except 660Ω)
Symbol
Test Condition
V-
I
DD
Normal operation
I
SS
In sleep mode
REV 10MΩ
input resistor
NLV
Best case straight
line
V- to AGND
10MΩ input resistor
100KΩ resistor
between VRH and
AGND
-3.5V
≤
V
≤
-2.2V
f
OSC
= 4MHZ
Ω
and Continuity
Mode
Between V- pin and
HOLD, RANGE,
KEY, FC1, FC2,
FC3, FC4, FC5,
BKLIT,MAXMIN
Between V- pin
and RS232
Between GND Pin
and SLACDC
±1%
±5%
100KΩ
resister
Between
VRH
0℃<TA<70℃
5
Min.
-3.5
—
—
—
—
-10
-2.4
-000
-1.3
3.1
—
-0.86
Typ.
-3.0
1.9
2.5
—
—
1
-2.3
000
-1.2
3.2
1
-0.78
Max
-2.2
2.2
5
±0.1
±0.1
10
-2.2
+000
-1.1
3.3
—
-0.70
Units
V
mA
µA
%F.S
1
%F.S
PA
V
counts
V
V
sec
V
V
REF
Internal pull-high to 0V
current
—
1.2
—
µA
—
µA
—
—
—
HZ
ppm/℃
—
11
1.5
Internal pull-low to V-
current
AC frequency response at 6.600V
range
Reference voltage temperature
coefficient
TC
RF
—
—
—
40-400
400-2000
50
v2.61
10/09/27
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