Linear Technology DC1010A-B - LTC2489 16-Bit 4/2-ch I²C Easy Drive Delta Sigma ADC (req DC590B) DC1010A-B DC1010A-B 데이터 시트
제품 코드
DC1010A-B
QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1010
2/4 CHANNEL 24,16,16/PGA-BIT ADC WITH I2C
3
HARDWARE SET-UP
JUMPERS
JP1, JP2 – Select the source for REF+ and REF-,
respectively. REF+ can be 5.00 volts from the on-
board LT1236 reference (default) or supplied exter-
nally. REF- can be Ground (0 volts, default) or sup-
plied externally.
respectively. REF+ can be 5.00 volts from the on-
board LT1236 reference (default) or supplied exter-
nally. REF- can be Ground (0 volts, default) or sup-
plied externally.
JP3, JP4 – Control for I
2
C address lines A0 and A1
respectively. These lines can be floated by removing
the jumpers, grounded (Low) or tied to Vcc (High).
The default mode is JP3, JP4 tied to Vcc. This is
required for use with Quick Eval software. The ad-
dresses generated are shown below.
the jumpers, grounded (Low) or tied to Vcc (High).
The default mode is JP3, JP4 tied to Vcc. This is
required for use with Quick Eval software. The ad-
dresses generated are shown below.
CA1
CA0
ADDRESS
LOW
LOW
0010100
LOW
HIGH
0010110
LOW
FLOAT
0010101
HIGH
LOW
0100110
HIGH
HIGH
0110100 (Default)
HIGH
FLOAT
0100111
FLOAT
LOW
0010111
FLOAT
HIGH
0100101
FLOAT
FLOAT
0100100
CONNECTION TO DC590 SERIAL CONTROLLER
J2 is the power and digital interface connector.
Connect to a DC590 serial controller with the sup-
plied 14-conductor ribbon cable. Digital signals are
also connected to through-hole test points on the
circuit board.
Connect to a DC590 serial controller with the sup-
plied 14-conductor ribbon cable. Digital signals are
also connected to through-hole test points on the
circuit board.
ANALOG CONNECTIONS
Analog signal connections are made via the row of
turret posts along the edge of the board.
turret posts along the edge of the board.
GND – Ground turrets are connected directly to the
internal analog ground plane.
internal analog ground plane.
VCC – This is the supply for the ADC. Do not draw
any power from this point. External power may be
applied to this point after disabling the Vcc supply
on DC590. See the DC590 quick start guide for de-
tails.
any power from this point. External power may be
applied to this point after disabling the Vcc supply
on DC590. See the DC590 quick start guide for de-
tails.
REF+, REF- - These turrets are connected to the
LTC2487/2489/2493 REF+ and REF- pins. If the on-
board reference is being used, the reference voltage
may be monitored from this point. An external ref-
erence may be connected to these terminals if JP1
and JP2 are configured for external reference.
LTC2487/2489/2493 REF+ and REF- pins. If the on-
board reference is being used, the reference voltage
may be monitored from this point. An external ref-
erence may be connected to these terminals if JP1
and JP2 are configured for external reference.
CH0 – CH3 – These are the differential inputs to the
LTC2493/2489/2487. They may be configured as
single–ended inputs with respect to the COM pin, or
as differential inputs (CH0-CH1, CH2-CH3) with the
polarity software selected.
LTC2493/2489/2487. They may be configured as
single–ended inputs with respect to the COM pin, or
as differential inputs (CH0-CH1, CH2-CH3) with the
polarity software selected.
DIGITAL CONNECTION
FO – Connects to the Frequency Control Pin. When
F
F
O
is connected to GND (Default connection), the
converter uses its internal oscillator running at
307.2 kHz. The conversion clock may also be over-
ridden by driving the F
307.2 kHz. The conversion clock may also be over-
ridden by driving the F
O
pin with an external clock in
order to change the output rate and the digital filter
rejection null.
rejection null.