AD7927BRUZ Analog Devices Inc, AD7927BRUZ Datasheet - Page 7

• 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

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 4. Pin Function Descriptions
Pin No.
1
2
3
4, 8, 17, 20
5, 6
7
16 to 9
18
19
Mnemonic
SCLK
DIN
CS
AGND
AV
REF
V
DOUT
V
IN
DRIVE
DD
0 to V
IN
IN
7
Description
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 AD7927 conversion process.
Data In. Logic input. Data to be written to the AD7927 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
range, AV
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. ADD2 through ADD0, 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
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 operates.
DD
should be from 4.75 V to 5.25 V.
IN
or 0 V to 2 × REF
Figure 3. 20-Lead TSSOP Pin Configuration
AGND
AGND
REF
SCLK
AV
AV
V
V
DIN
CS
IN
IN
DD
DD
IN
7
6
10
1
2
3
4
5
6
8
9
7
Rev. A | Page 7 of 28
IN
(Not to Scale)
, as selected via the RANGE bit in the control register. Any unused input
AD7927
TOP VIEW
DD
range for the AD7927 is from 2.7 V to 5.25 V. For the 0 V to 2 × REF
19
11
20
18
17
16
15
14
13
12
AGND
V
DOUT
AGND
V
V
V
V
V
V
DRIVE
IN
IN
IN
IN
IN
IN
0
1
2
3
4
5
AD7927
IN