AD7887ARMZ Analog Devices Inc, AD7887ARMZ Datasheet - Page 19

IC ADC 12BIT 2CH SRL 8-MSOP

AD7887ARMZ

Manufacturer Part Number
AD7887ARMZ
Description
IC ADC 12BIT 2CH SRL 8-MSOP
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD7887ARMZ

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-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Resolution (bits)
12bit
Sampling Rate
125kSPS
Input Channel Type
Single Ended
Supply Voltage Range - Analog
2.7V To 5.25V
Supply Current
850µA
Number Of Elements
1
Resolution
12Bit
Architecture
SAR
Sample Rate
125KSPS
Input Polarity
Unipolar
Input Type
Voltage
Rated Input Volt
2.5V
Differential Input
No
Power Supply Requirement
Single
Single Supply Voltage (typ)
3.3/5V
Single Supply Voltage (min)
2.7V
Single Supply Voltage (max)
5.25V
Dual Supply Voltage (typ)
Not RequiredV
Dual Supply Voltage (min)
Not RequiredV
Dual Supply Voltage (max)
Not RequiredV
Power Dissipation
3.5mW
Differential Linearity Error
±2LSB
Integral Nonlinearity Error
±2LSB
Operating Temp Range
-40C to 125C
Operating Temperature Classification
Automotive
Mounting
Surface Mount
Pin Count
8
Package Type
MSOP
Input Signal Type
Single-Ended
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant

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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

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