AD7927BRUZ Analog Devices Inc, AD7927BRUZ Datasheet - Page 6

• Manufacturer Part Number: AD7927BRUZ
• Description: IC ADC 12BIT 8CH 200KSPS 20TSSOP
• Manufacturer: Analog Devices Inc

Specifications of AD7927BRUZ

• Data Interface: DSP, MICROWIRE™, QSPI™, Serial, SPI™
• Number Of Bits: 12
• Sampling Rate (per Second): 200k
• Number Of Converters: 1
• Power Dissipation (max): 7.5mW
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP (0.173", 4.40mm Width)
• Resolution (bits): 12bit
• Sampling Rate: 200kSPS
• Input Channel Type: Single Ended
• Supply Voltage Range - Analog: 2.7V To 5.25V
• Supply Current: 1.5mA
• Number Of Elements: 1
• Resolution: 12Bit
• Architecture: SAR
• Sample Rate: 200KSPS
• Input Polarity: Unipolar
• Input Type: Voltage
• Rated Input Volt: 2.5/5V
• Differential Input: No
• Power Supply Requirement: Analog and Digital
• Single Supply Voltage (typ): 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: 7.5mW
• Differential Linearity Error: -0.9LSB/1.5LSB
• Integral Nonlinearity Error: ±1LSB
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 20
• Package Type: TSSOP
• Input Signal Type: Single-Ended
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: EVAL-AD7927CBZ - BOARD EVALUATION FOR AD7927
• Lead Free Status / Rohs Status: Compliant

AD7927
Pin No.
1
2
3
4, 8, 17, 20
5, 6
7
16–9
18
19
Mnemonic
SCLK
DIN
CS
AGND
AV
REF
V
DOUT
V
IN
DRIVE
DD
0–V
IN
IN
7
Function
Serial Clock. Logic input. SCLK provides the serial clock for accessing data from the part. This clock
input is also used as the clock source for the AD7927s conversion process.
Data In. Logic input. Data to be written to the AD7927s Control Register is provided on this input
and is clocked into the register on the falling edge of SCLK (see the Control Register section).
Chip Select. Active low logic input. This input provides the dual function of initiating conversions on
the AD7927 and framing the serial data transfer.
Analog Ground. Ground reference point for all analog circuitry on the AD7927. All analog input
signals and any external reference signal should be referred to this AGND voltage. All AGND pins
should be connected together.
Analog Power Supply Input. The AV
0 V to 2 ¥ REF
Reference Input for the AD7927. An external reference must be applied to this input. The voltage
range for the external reference is 2.5 V ± 1% for specified performance.
Analog Input 0 through Analog Input 7. Eight single-ended analog input channels that are multiplexed
into the on-chip track-and-hold. The analog input channel to be converted is selected by using the
address bits ADD2 through ADD0 of the Control Register. The address bits in conjunction with the
SEQ and SHADOW bits allow the sequencer to be programmed. The input range for all input channels
can extend from 0 V to REF
Any unused input channels should be connected to AGND to avoid noise pickup.
Data Out. Logic output. The conversion result from the AD7927 is provided on this output as a serial
data stream. The bits are clocked out on the falling edge of the SCLK input. The data stream from the
AD7927 consists of two leading zeros, two address bits indicating which channel the conversion result
corresponds to, followed by the 12 bits of conversion data, MSB first. The output coding may be
selected as straight binary or twos complement via the CODING bit in the Control Register.
Logic Power Supply Input. The voltage supplied at this pin determines at what voltage the serial interface
of the AD7927 will operate.
IN
PIN FUNCTION DESCRIPTIONS
range, AV
PIN CONFIGURATION
AGND
REF
AGND
SCLK
AV
AV
V
V
DIN
CS
IN
IN
DD
DD
IN
7
6
IN
20-Lead TSSOP
DD
10
1
2
3
4
5
6
7
8
9
or 0 V to 2 ¥ REF
(Not to Scale)
should be from 4.75 V to 5.25 V.
AD7927
TOP VIEW
–6–
DD
range for the AD7927 is from 2.7 V to 5.25 V. For the
20
19
18
17
16
15
14
13
12
11
AGND
DOUT
AGND
V
V
V
V
V
V
V
DRIVE
IN
IN
IN
IN
IN
IN
0
1
2
3
4
5
IN
, as selected via the RANGE bit in the Control Register.
REV. 0