ES51997(60000counts)
DMM Analog front end
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
CA+
OHMC4
NC
NC
NC
NC
R9K
IO Positive auto-zero capacitor connection for capacitor measurement
O
-
Filter capacitor connection for resistance mode.
Not connected
-
Not connected
-
Not connected
-
Not connected
O
O
O
O
O
O
O
O
I
Connect to a precise 9KΩ resister for capacitor measurement.
Connect to a precise 1KΩ resister for capacitor measurement.
Capacitor C1 connection for internal low-pass filter
Capacitor C2 connection for internal low-pass filter
Capacitor C3 connection for internal low-pass filter
Capacitor C1 connection for internal low-pass filter
Minimum peak hold output
R1K
LPC1
LPC2
LPC3
LPFOUT
PMIN
PMAX
CPKIN
STBEEP
Maximum peak hold output.
Bypass capacitor for peak mode
O
Fast low-impedance sensed output for CONT./Diode mode Build-in a
internal comparator for OVX pin.
65
66-77
78
79
80
81
82
83
FREQ
NC
OSC2
OSC1
CS
IO_CTRL
BZOUT
NC
I
-
O
I
I
I
Frequency counter input, offset V-/2 internally by the chip.
Not connected
Crystal oscillator output connection
Crystal oscillator input connection
Set to high to enable ES51997. Set to low to enter sleep mode
MPU I/O level LOW setting. Connect to DGND or V-.
Buzzer frequency output. Normal low state.
Not connected
I
-
84
85
86
87
88
89
90
DATA_NEW
SCLK
SDATA
C+
O
I
New ADC data ready
Serial clock input
IO Serial data input/output
O
O
I
Positive capacitor connection for on-chip DC-DC converter.
Negative capacitor connection for on-chip DC-DC converter.
Low battery configuration input.
Negative supply voltage.
C-
LBAT
V-
P
91
V-
P
Negative supply voltage.
92
93
94
95
96
97
98
99
uPVCC
V+
V+
DGND
AGND
AGND
CH+
P
Switch 5 for function selection.
Output of on-chip DC-DC converter.
Output of on-chip DC-DC converter.
Digital ground.
Analog ground.
Analog ground.
O
O
G
G
G
IO Positive connection for reference capacitor of high-speed A/D.
IO Negative connection for reference capacitor of high-speed A/D.
CH-
100
CIH
O
High-speed integrator output. Connect to integral capacitor.
ver. 1.7
4
12/01/12
CYRUSTEK [ Cyrustek corporation ]
