PGA2500IDBR

The PGA2500IDBR is an electronic component from Texas Instruments. View the full PGA2500IDBR datasheet below including key specifications, electrical characteristics, absolute maximum ratings.

Manufacturer

Texas Instruments

Key Specifications

Parameter	Value
Case/Package	SSOP
Dual Supply Voltage	5 V
Features	Differential Inputs, Microphone
Height	2 mm
Interface	SPI
Lead Free	Lead Free
Length	10.2 mm
Lifecycle Status	Production (Last Updated: 1 day ago)
Manufacturer Lifecycle Status	ACTIVE (Last Updated: 1 day ago)
Max Dual Supply Voltage	5.25 V
Max Operating Temperature	85 °C
Min Dual Supply Voltage	4.75 V
Min Operating Temperature	-40 °C
Mounting Type	Surface Mount
Number of Pins	28
Operating Supply Voltage	5.25 V
Operating Temperature	-40°C ~ 85°C (TA)
Output Type	1-Channel (Mono)
Package / Case	28-SSOP (0.209", 5.30mm Width)
Quiescent Current	30 mA
Radiation Hardening	No
RoHS	Compliant
Schedule B	8542390000, 8542390000\|8542390000, 8542390000\|8542390000\|8542390000, 8542390000\|8542390000\|8542390000\|8542390000
Supplier Device Package	28-SSOP
Thickness	1.95 mm
Type	Class AB
Supply Voltage	±4.75V ~ 5.25V
Weight	208.397344 mg
Width	5.3 mm

Overview

The PGA2500 is a digitally controlled, analog microphone preamplifier designed for use as a front end for highperformance audio analog-to-digital converters (ADCs). The PGA2500 features include low noise, wide dynamic range, and a differential signal path. An on-chip DC servo loop is employed to minimize DC offset, while a common-mode servo function may be used to enhance common-mode rejection.

The PGA2500 features a gain range of 10dB through 65dB (1dB/step), along with a unity gain setting. The wide gain range allows the PGA2500 to be used with a variety of microphones. Gain settings and internal functions are programmed using a 16-bit control word, which is loaded using a simple serial port interface. A serial data output pin provides support for daisy-chained connection of multiple PGA2500 devices. Four programmable digital outputs are provided for controlling the external switching of input pads, phantom power, high pass filters, and polarity reversal functions. The PGA2500 requires both +5V and -5V power supplies and is available in a small SSOP-28 package.

SBOS289A - NOVEMBER 2003 - REVISED DECEMBER 2003

Features

D Fully Differential Input-to-Output Architecture
D Digitally Controlled Gain Using Serial Port Interface:
Gain Range: 10dB through 65dB, 1dB per step
Unity (0dB) Gain Setting via Serial Port or Dedicated Control Pin
D Dynamic Performance:
Equivalent Input Noise with Z S = 150 Ω and Gain = 30dB: -128dBu
Total Harmonic Distortion plus Noise (THD+N) with Gain = 30dB: 0.0004%
D Zero Crossing Detection Minimizes Audible Artifacts when Gain Switching
D Integrated DC Servo Minimizes Output Offset Voltage
D Common-Mode Servo Improves CMRR
D Four-Wire Serial Control Port Interface:
Simple Interface to Microprocessor or DSP Serial Ports
Supports Daisy-Chaining of Multiple PGA2500 Devices
D Dedicated Input Pin for Selecting Unity Gain
D Overload Output Pin Provides Clipping Indication
D Four General-Purpose Digital Output Pins
D Requires ± 5V Power Supplies
D Available in an SSOP-28 Package

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of T exas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PGA2500

SBOS289A - NOVEMBER 2003 - REVISED DECEMBER 2003

Applications

D Microphone Preamplifiers and Mixers
D Digital Mixers and Recorders

Pin Configuration

PIN NUMBER	NAME	DESCRIPTION
1	GPO1	General-Purpose CMOS Logic Output
2	GPO2	General-Purpose CMOS Logic Output
3	GPO3	General-Purpose CMOS Logic Output
4	GPO4	General-Purpose CMOS Logic Output
5	OVR	Over Range Output (Active High)
6	DGND	Digital Ground
7	DCEN	DC Servo Enable (Active Low)
8	0dB	Unity Gain Enable (Active High)
9	ZCEN	Zero Crossing Detector Enable (Active High)
10	SDI	Serial Data Input
11	CS	Chip Select Input (Active Low)
12	SCLK	Serial Data Clock Input
13	SDO	Serial Data Output
14	VD-	-5V Digital Supply
15	VA-	-5V Analog Supply
16	V OUT -	Analog Output, Inverting
17	V OUT +	Analog Output, Non-Inverting
18	VA+	+5V Analog Supply
19	VA+	+5V Analog Supply
20	VA-	-5V Analog Supply
21	C S22	DC Servo Capacitor #2, Terminal 2
22	C S21	DC Servo Capacitor #2, Terminal 1
23	C S12	DC Servo Capacitor #1, Terminal 2
24	C S11	DC Servo Capacitor #1, Terminal 1
25	V COM IN	Common Mode Voltage Input, 0V to +2.5V
26	V IN -	Analog Input, Inverting
27	V IN +	Analog Input, Noninverting
28	AGND	Analog Ground

Electrical Characteristics

All parameters specified with T A = +25 ° C, VA+ = +5V, VA- = -5V, VD- = -5V, and V COMIN = 0V, unless otherwise noted .

		PGA2500	PGA2500	PGA2500	UNIT UNIT
PARAMETER PARAMETER	TEST CONDITIONS TEST CONDITIONS	MIN	TYP	MAX
DC Characteristics
Step Size	Gain = 10dB through 65dB		1		dB
Gain Error	All Gain Settings		0.5		dB
AC Characteristics
THD+N with f IN = 1kHz	Gain = 0dB, V OUT = 3.5V RMS , V COM IN = 0V Gain = 30dB, V OUT = 3.5V RMS , V COM IN = 0V		-114 -108	-108 -102	dB dB
Analog Input
Maximum Input Voltage	Gain = 0dB	VA- +1.5		VA+ -2.0	V
Per Input Pin					Ω
Differential			4600 9200		Ω
Analog Output
Output Voltage Range	V COM IN = 0V, R L = 600 Ω	VA- +0.9		VA+ -0.9	V
Output Offset Voltage	DC Servo On, Any Gain		± 0.04	± 1	mV
Input Referred Offset	DC Servo Off, Gain = 30dB		± 1		mV
Output Resistive Loading		600			Ω
Load Capacitance Stability			100		pF
Short Circuit Current	10-second duration		100		mA
Digital Characteristics
High-Level Input Voltage, V IH		+2.0		VA+	V
Low-Level Input Voltage, V IL		-0.3		0.8	V
High-Level Output Voltage, V OH	I O = 200 μ A	(VA+) - 1.0			V
Low-Level Output Voltage, V OL	I O = -3.2mA			0.4	V
Input Leakage Current, I IN			2	10	μ A
Switching Characteristics
Serial Clock (SCLK) Frequency	f SCLK	0		6.25	MHz
Serial Clock (SCLK) Pulse Width Low	t PH	80			ns
Serial Clock (SCLK) Pulse Width High	t PL	80			ns
Input Timing
SDI Setup Time	t SDS	20			ns
SDI Hold Time	t SDH	20			ns
CS Falling to SCLK Rising	t CSCR	90			ns
SCLK Falling to CS Rising	t CFCS	35			ns
Output Timing
CS Low to SDO Active	t CSO			35	ns
SCLK Falling to SDO Data Valid	t CFDO			60	ns
CS High to SDO High Impedance	t CSZ			100	ns
Power Supply
Operating Voltage
VA+		+4.75	+5	+5.25	V
VA-		-4.75	-5	-5.25	V
VD-		-4.75	-5	-5.25	V
Quiescent Current
IA+	VA+ = +5V		30	40	mA
IA-	VA- = -5V		30	40	mA
ID-	VD- = -5V		1	2	mA

Absolute Maximum Ratings

Over operating free-air temperature range unless otherwise noted (1)

	PGA2500	UNIT
Supply Voltage, VA+	+5.5	V
Supply Voltage, VA-	-5.5	V
Supply Voltage, VD-	-5.5	V
Voltage Difference, VA- to VD-	Less than 300	mV
Analog input voltage	(VA-) -0.3 to (VA+) +0.3	V
Digital input voltage	-0.3 to (VA+) + 0.3	V
Operating Temperature Range	-40 to +85	° C
Storage Temperature Range	-60 to +150	° C

Typical Application

This section provides practical information for designing the PGA2500 into end applications.

Related Variants

The following components are covered by the same datasheet.

Part Number	Manufacturer	Package
PGA2500	Texas Instruments	—
PGA2500I	Texas Instruments	—
PGA2500IDB	Texas Instruments	—
PGA2500IDBG4	Texas Instruments	—

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