ADC78H89CIMT National Semiconductor, ADC78H89CIMT Datasheet - Page 2

• Manufacturer Part Number: ADC78H89CIMT
• Description: IC, 12BIT ADC 500KSPS, POWERWISE
• Manufacturer: National Semiconductor

Specifications of ADC78H89CIMT

• Resolution (bits): 12bit
• Input Channel Type: Single Ended
• Data Interface: Serial, SPI
• Supply Voltage Range - Analogue: 2.7V To 5.25V
• Supply Voltage Range - Digital: -0.3V To 5.25V, 2.7V To 5.25V
• Sampling Rate: 500kSPS
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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ANALOG I/O
DIGITAL I/O
POWER SUPPLY
Block Diagram
Pin Descriptions and Equivalent Circuits
Pin No.
5 - 11
4, 12
16
15
14
13
2
1
3
AIN1 to AIN7
Symbol
DOUT
SCLK
AV
DV
GND
DIN
NC
CS
DD
DD
Equivalent Circuit
2
Analog inputs. These signals can range from 0V to AV
This pin is not connected internally, and can be left floating,
or tied to ground.
Digital clock input. The range of frequencies for this input is
50 kHz to 8 MHz, with guaranteed performance at 8 MHz.
This clock directly controls the conversion and readout
processes.
Digital data output. The output samples are clocked out of this
pin on falling edges of the SCLK pin.
Digital data input. The ADC78H89’s Control Register is
loaded through this pin on rising edges of the SCLK pin.
Chip select. On the falling edge of CS, a conversion process
begins. Conversions continue as long as CS is held low.
Positive analog supply pin. This pin should be connected to a
quiet +2.7V to +5.25V source and bypassed to GND with 0.1
µF ceramic monolithic and 1 µF tantalum capacitors located
within 1 cm of the power pin.
Positive digital supply pin. This pin should be connected to a
+2.7V to AV
ceramic monolithic capacitor located within 1 cm of the power
pin.
The ground return for both analog and digital supplies. These
pins are tied directly together internally, so must be connected
to the same potential. If any potential exists across these
pins, large currents will flow through the device.
DD
supply, and bypassed to GND with a 0.1 µF
Description
20061607
DD
.