AD7887ARZ Analog Devices Inc, AD7887ARZ Datasheet - Page 19
![IC ADC 12BIT 2CHAN SRL 8SOIC](/photos/5/66/56684/505-8-soic_sml.jpg)
AD7887ARZ
Manufacturer Part Number
AD7887ARZ
Description
IC ADC 12BIT 2CHAN SRL 8SOIC
Manufacturer
Analog Devices Inc
Datasheet
1.AD7887WARMZ.pdf
(24 pages)
Specifications of AD7887ARZ
Data Interface
DSP, MICROWIRE™, QSPI™, Serial, SPI™
Design Resources
Software Calibrated, 1 MHz to 8 GHz, 70 dB RF Power Measurement System Using AD8318 (CN0150)
Number Of Bits
12
Sampling Rate (per Second)
125k
Number Of Converters
1
Power Dissipation (max)
3.5mW
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Resolution (bits)
12bit
Sampling Rate
125kSPS
Input Channel Type
Single Ended
Supply Voltage Range - Analog
2.7V To 5.25V
Supply Current
850µA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AD7887ARZ
Manufacturer:
ADI
Quantity:
388
Company:
Part Number:
AD7887ARZ
Manufacturer:
Analog Devices Inc
Quantity:
135
Part Number:
AD7887ARZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
AD7887 to MC68HC11
The serial peripheral interface (SPI) on the MC68HC11 is
configured for master mode (MSTR = 1) when the clock
polarity bit (CPOL) = 1 and the clock phase bit (CPHA) = 1.
The SPI is configured by writing to the SPI Control Register
(SPCR)—see the M68HC11 reference manual from Freescale
Semiconductor, Inc., for more information. The serial transfer
takes place as two 8-bit operations. A connection diagram is
shown in Figure 25.
AD7887 to 8051
It is possible to implement a serial interface using the data ports
on the 8051. This allows a full duplex serial transfer to be imple-
mented. The technique involves bit-banging an input/output
port (for example, P1.0) to generate a serial clock and using two
other input/output ports (for example, P1.1 and P1.2) to shift
data in and out—see Figure 26.
1
ADDITIONAL PINS OMITTED FOR CLARITY.
AD7887
1
SCLK
DOUT
DIN
CS
Figure 25. Interfacing to the MC68HC11
SCLK/PD4
MISO/PD2
MOSI/PD3
PA0
MC68HC11
1
Rev. D | Page 19 of 24
AD7887 to PIC16C6x/PIC16C7x
The PIC16C6x synchronous serial port (SSP) is configured as an
SPI master with the clock polarity bit = 1. This is done by writing to
the synchronous serial port control register (SSPCON). See the
PIC16/PIC17 Microcontroller User Manual. Figure 27 shows the
hardware connections needed to interface to the PIC16C6x/
PIC16C7x. In this example, input/output port RA1 is being used to
pulse CS . This microcontroller only transfers eight bits of data
during each serial transfer operation. Therefore, two consecutive
read/write operations are needed.
1
1
ADDITIONAL PINS OMITTED FOR CLARITY.
ADDITIONAL PINS OMITTED FOR CLARITY.
AD7887
AD7887
Figure 26. Interfacing to the 8051 Using Input/Output Ports
Figure 27. Interfacing to the PIC16C6x/PIC16C7x
1
1
DOUT
SCLK
SCLK
DOUT
DIN
DIN
CS
CS
P1.0
P1.1
P1.2
P1.3
SCK/RC3
SDI/RC4
SDO/RC5
RA1
PIC16C7x
PIC16C6x/
8051
AD7887
1
1